# Resettable Fuse, PPTC, 2920 (7451 Metric), MF-LSMF Series, 60 V, 500 mA, 1 A, 4 s

![Product image](https://novapart.co/image/farnell:4308716/)

**URL**: https://novapart.co/products/MF-LSMF050X-2/resettable-fuse-pptc-2920-7451-metric-mf-lsmf
**SKU**: MF-LSMF050X-2
**Manufacturer**: BOURNS
**Category**: Circuit Protection || Thermistors || Resettable Fuses || Surface Mount PPTCs
**Price**: €0.2110
**Stock**: 1000+
**Lead Time**: 92 days (indicative)

## Specifications

| Parameter | Value |
|---|---|
| Svhc | No SVHC (04-Feb-2026) |
| Time To Trip | 4s |
| Trip Current | 1A |
| Product Range | MF-LSMF Series |
| Voltage Rating | 60V |
| Holding Current | 500mA |
| Pptc Case Style | 2920 (7451 Metric) |
| Current Rating Max | 40A |
| Operating Temperature Max | 85°C |
| Operating Temperature Min | -40°C |
| Automotive Qualification Standard | - |

## Datasheet

📄 [Download PDF](https://novapart.co/datasheet/farnell:4308716/)

## **Features** 

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**----- Start of picture text -----**<br>
n  Standard 2920 footprint n  High power rating and high voltage<br>n  Swift Time-to-Trip (TTT) for safeguarding  n  Agency recognition:<br>against overcurrent events n  TÜV certifications cover IEC 62319-1,<br>n  Excellent solderability with ENIG terminal IEC 60738-1, and IEC 60730-1:2013,<br>n  Symmetric designs and low profile  encompassing clause 15, clause 17, and<br>Annex J.<br>n  RoHS compliant* and halogen free**<br>QL<br>MF-LSMF Series – PTC Resettable Fuses<br>BOURNS  es<br>&<br>RoHS COMPLIANT*<br>HALOGEN FREE**<br>**----- End of picture text -----**<br>


~~**Electrical Characteristics**~~ 

|**Model**<br>~~=.=~~<br>~~po~~|**Vmax**<br>~~=.=~~|**Imax**<br>~~=.=~~|**Ihold**<br>~~=.=~~|**Itrip**<br>~~=.=~~|**Resistance**<br>~~=.=~~|**Resistance**<br>~~=.=~~|**Max. Time**<br>**to Trip**<br>~~=.=~~|**Max. Time**<br>**to Trip**<br>~~=.=~~|**Tripped**<br>**Power**<br>**Dissipation**<br>~~=.=~~|**Agency**<br>**Recognition**<br>~~=.=~~|**Agency**<br>**Recognition**<br>~~=.=~~|**AEC-Q200**<br>**Compliant**<br>~~=.=~~|
|---|---|---|---|---|---|---|---|---|---|---|---|---|
||||**at 23 °C**<br>~~=.=~~||**at 23 °C**<br>**Ohms**<br>~~=.=~~||**at 23 °C**<br>~~=.=~~||**at 23 °C**<br>**Watts**<br>~~=.=~~|**cUL**<br>~~=.=~~|**TÜV**<br>~~=.=~~||
||**Volts**<br>~~=.=~~<br>~~a~~|**Amps**<br>~~=.=~~<br>~~eee~~|**Amps**<br>~~=.=~~<br>~~eee~~||**RMin**<br>~~=.=~~<br>~~eee~~|**R1Max**<br>**1**<br>~~=.=~~<br>~~eee~~|**Amps**<br>~~=.=~~<br>~~eee~~|**Seconds**<br>~~=.=~~<br>~~eee~~|**Typ.**<br>~~=.=~~<br>~~eee~~|E174545<br>~~=.=~~<br>~~eee~~|R50256634<br>~~=.=~~<br>~~eee~~||
|MF-LSMF030X<br>~~=.=~~<br>~~po~~<br>~~po~~|60<br>~~=.=~~<br>~~a~~|40<br>~~=.=~~<br>~~eee~~|0.30<br>~~=.=~~<br>~~eee~~|0.6<br>~~=.=~~<br>~~eee~~|0.9<br>~~=.=~~<br>~~eee~~|4.8<br>~~=.=~~<br>~~eee~~|1.5<br>~~=.=~~<br>~~eee~~|3.0<br>~~=.=~~<br>~~eee~~|1.5<br>~~=.=~~<br>~~eee~~|3<br>~~=.=~~<br>~~eee~~|3<br>~~=.=~~<br>~~eee~~|~~=.=~~|
|MF-LSMF050X<br>~~po~~<br>~~po~~<br>~~po~~|60<br>~~a~~|40<br>~~eee~~|0.50<br>~~eee~~|1.0<br>~~eee~~|0.2<br>~~eee~~|1.4<br>~~eee~~|2.5<br>~~eee~~|4.0<br>~~eee~~|1.5<br>~~eee~~|3<br>~~eee~~|3<br>~~eee~~||
|MF-LSMF075X<br>~~po~~<br>~~po~~<br>~~po~~|30|40|0.75|1.5|0.15|1.00|8.0|0.3|1.5|3|3||
|MF-LSMF075/60X<br>~~po~~<br>~~po~~<br>~~po~~|60|40|0.75|1.5|0.15|1.00|8.0|0.3|1.5|3|3||
|MF-LSMF110X<br>~~po~~<br>~~po~~<br>~~po~~|33|40|1.10|2.2|0.07|0.41|8.0|0.5|1.5|3|3||
|MF-LSMF110/60X<br>~~po~~<br>~~po~~<br>~~po~~|60|40|1.10|2.2|0.07|0.41|8.0|0.5|2.0|3|3||
|MF-LSMF125X<br>~~po~~<br>~~po~~<br>~~po~~|15|40|1.25|2.5|0.05|0.25|8.0|2.0|1.5|3|3||
|MF-LSMF125/33X<br>~~po~~<br>~~po~~<br>~~po~~|33|40|1.25|2.5|0.055|0.25|8.0|2.0|1.5|3|3||
|MF-LSMF150X<br>~~po~~<br>~~po~~<br>~~po~~|15|40|1.5|3.0|0.05|0.23|8.0|2.0|1.5|3|3||
|MF-LSMF150/33X<br>~~po~~<br>~~po~~<br>~~**p**o~~|33|40|1.5|3.0|0.05|0.23|8.0|2.0|1.5|3|3||
|MF-LSMF185X<br>~~po~~<br>~~**p**o~~|15|40|1.85|3.7|0.045|0.15|8.0|2.5|1.5|3|3||
|MF-LSMF185/24X<br>~~**p**o~~<br>~~po~~|24|40|1.85|3.7|0.045|0.15<br>~~o~~|8.0<br>~~o~~|2.5<br>~~o~~|1.5<br>~~o~~|3<br>~~o~~|3<br>~~o~~|~~o~~|
|MF-LSMF185/33X<br>~~po~~<br>~~po~~|33|40|1.85|3.7|0.045|0.15<br>~~o~~|8.0<br>~~o~~|2.5<br>~~o~~|1.5<br>~~o~~|3<br>~~o~~|3<br>~~o~~|3<br>~~o~~|
|MF-LSMF200X<br>~~po~~<br>~~po~~<br>~~po~~|15|40|2.0|4.0|0.035|0.125|8.0|5.0|1.5|3|3||
|MF-LSMF200/24X<br>~~po~~<br>~~po~~<br>~~po~~|24|40|2.0|4.0|0.035|0.125|8.0|5.0|1.5|3|3||
|MF-LSMF260X<br>~~po~~<br>~~po~~<br>~~po~~|24|40|2.6|5.2|0.020|0.075|8.0|5.0|1.5|3|3|3|
|MF-LSMF260/6X<br>~~po~~<br>~~po~~<br>~~po~~|6|40|2.6|5.0|0.020|0.075|8.0|10|1.5|3|3||
|MF-LSMF260/16X<br>~~po~~<br>~~po~~<br>~~po~~|16|40|2.6|5.2|0.020|0.075|8.0|5.0|1.5|3|3||
|MF-LSMF300X<br>~~po~~<br>~~po~~<br>~~po~~|6|40|3.0|5.0|0.015|0.048|8.0|15|1.5|3|3||
|MF-LSMF300/16X<br>~~po~~<br>~~po~~<br>~~po~~|16<br>~~po~~|40|3.0|5.0|0.015|0.048|8.0|15|1.5|3|3||
|MF-LSMF300/24X<br>~~po~~<br>~~po~~<br>~~po~~|24<br>~~po~~|40|3.0|5.2|0.015|0.075|8.0|15|1.5|3|3|3|
|MF-LSMF330X<br>~~po~~<br>~~po~~<br>~~po~~|6<br>~~po~~|40|3.3|5.5|0.010|0.055|8.0|15|2.0|3|3||
|MF-LSMF330/12X<br>~~po~~<br>~~po~~<br>~~po~~|12<br>~~po~~|40|3.3|5.5|0.010|0.055|8.0|15|2.0|3|3||
|MF-LSMF330/16X<br>~~po~~<br>~~po~~<br>~~po~~|16<br>~~po~~|40|3.3|5.5|0.010|0.055|8.0|15|2.0|3|3||
|MF-LSMF330/24X<br>~~po~~<br>~~po~~<br>~~po~~|24<br>~~po~~|40|3.3|5.5|0.010|0.055|8.0|15|2.0|3|3||
|MF-LSMF400/16X<br>~~po~~<br>~~po~~<br>~~po~~|16|40|4.0|8.0|0.005|0.040|20|4.0|1.5|3|3||
|MF-LSMF500/16X<br>~~po~~<br>~~po~~<br>~~po~~|16|40|5.0|10.0|0.005|0.025|20|5.0|1.5|3|3||
|MF-LSMF600/12X<br>~~po~~<br>~~po~~|12|50|6.0|12.0|0.004|0.020|30|2.0|2.0|3|3||



1R1max: measured one hour post reflow. 

## ~~**Additional Information**~~ 

BOURNS’ **Asia-Pacific:** Tel: +886-2 2562-4117 • Email: asiacus@bourns.com **EMEA:** Tel: +36 88 885 877 • Email: eurocus@bourns.com ~~an~~ **The Americas:** Tel: +1-951 781-5500 • Email: americus@bourns.com **www.bourns.com** 

Click these links for more information: 

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PRODUCT  TECHNICAL INVENTORY SAMPLES CONTACT<br>SELECTOR LIBRARY<br>**----- End of picture text -----**<br>


- RoHS Directive 2015/863, Mar 31, 2015 and Annex. 

> ** Bourns considers a product to be “halogen free” if (a) the Bromine (Br) content is 900 ppm or less; (b) the Chlorine (Cl) content is 900 ppm or less; and (c) the total Bromine (Br) and Chlorine (Cl) content is 1500 ppm or less. Specifications are subject to change without notice. Users should verify actual device performance in their specific applications. The products described herein and this document are subject to specific legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf. 

**WARNING Cancer and Reproductive Harm** www.P65Warnings.ca.gov 

## **Applications** 

n Low voltage telecom equipment 

n Powered ethernet IEEE 802.3af ports 

n Security systems n Portable electronics 

n Automotive electronic control modules (AEC-Q200 compliant models) 

n IEEE 1394 ports 

n USB for POS and IPC 

n Industrial control 

## **MF-LSMF Series - PTC Resettable Fuses** 

## ~~**Environmental Characteristics**~~ 

**==> picture [330 x 18] intentionally omitted <==**

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Item Condition Criteria<br>**----- End of picture text -----**<br>


|**Item**|**Condition**|**Criteria**|
|---|---|---|
||||
|Operating Temperature|-40 °C to +85 °C||
|Recommended Storage|+40 °C max. / 70 % R.H. max.||
|Passive Aging|+85 °C, 1000 hours|±5 % typical<br>resistance change|
|Humidity Aging|+85 °C, 85 % R.H. 1000 hours|±5 % typical<br>resistance change|
|Thermal Shock|-40 °C to +85 °C, 20 times|±10 % typical<br>resistance change|
|Solvent Resistance|MIL-STD-202, Method 215|No change<br>(marking still legible)|
|Vibration|MIL-STD-883C, Method 2007.1<br>Condition A|No change<br>(Rmin< R < R1max)|
|Moisture Sensitivity Level (MSL)|See Note||
|ESD Classifcation|Class 6 (per AEC-Q200-2, HBM)||



## ~~**How to Order**~~ 

**MF - LSMF 185/33X - 2** Multifuse[®] Product Designator Series LSMF = 7451 mm (2920 mils) Surface Mount Component Hold Current, Ihold 030-600 (0.3 Amps - 6.0 Amps) Voltage Option /33 =  33 Volt Rated X =  Multifuse[®] freeXpansion[™] Design Packaging -2 =  Tape and Reel packaged per EIA-481 

## ~~**Test Procedures and Requirements**~~ 

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Item Test Conditions Accept/Reject Criteria<br>**----- End of picture text -----**<br>


|**Item**|**Test Conditions**|**Accept/Reject Criteria**|
|---|---|---|
||||
|Visual/Mechanical|Verify dimensions and materials|Per MF physical description|
|Resistance|In still air @ 23 °C|Rmin≤ R ≤ Rmax|
|Time to Trip|At specified current, Vmax, 23 °C, still air|T ≤ max. time to trip (seconds)|
|Hold Current|30 min. at Ihold, still air|No trip|
|Trip Cycle Life|Vmax, Imax, 100 cycles|No arcing or burning|
|Trip Endurance|Vmax, 48 hours|No arcing or burning|
|Solderability|245 °C ± 5 °C, 5 seconds|95 % min. coverage|



## ~~**Typical Part Marking**~~ 

Represents total content. Layout may vary. 

## **PART IDENTIFICATION EXAMPLES:** 

MF-LSMF030X      = 3 MF-LSMF125X      = 7 MF-LSMF260X      = E MF-LSMF330/24X = O MF-LSMF050X      = 4 MF-LSMF125/33X = L MF-LSMF260/6X   = P MF-LSMF400/16X = K MF-LSMF075X      = 5 MF-LSMF150X      = M MF-LSMF260/16X = E MF-LSMF500/16X = S **E** MF-LSMF075/60X = 5 MF-LSMF150/33X = 8 MF-LSMF300X      = F MF-LSMF600/12X = T MF-LSMF110X      = 6 MF-LSMF185X      = N MF-LSMF300/16X = H MF-LSMF110/60X = 6 MF-LSMF185/24X = 9 MF-LSMF300/24X = J MF-LSMF185/33X = 9 MF-LSMF330X      = X **X BI-WEEKLY DATE CODE:** MF-LSMF200X      = A MF-LSMF330/12X = O WEEKS 47-48 = X MF-LSMF200/24X = A MF-LSMF330/16X = O 

Specifications are subject to change without notice. Users should verify actual device performance in their specific applications. The products described herein and this document are subject to specific legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf. 

## **MF-LSMF Series - PTC Resettable Fuses** 

## ~~**Thermal Derating Chart - Ihold (Amps)**~~ 

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Ambient Operating Temperature<br>Model<br>-40 ˚C -20 ˚C 0 ˚C 23 ˚C 40 ˚C 50 ˚C 60 ˚C 70 ˚C 85 ˚C<br>**----- End of picture text -----**<br>


|**Model**|**Ambient Operating Temperature**|**Ambient Operating Temperature**|**Ambient Operating Temperature**|**Ambient Operating Temperature**|**Ambient Operating Temperature**|**Ambient Operating Temperature**|**Ambient Operating Temperature**|**Ambient Operating Temperature**|**Ambient Operating Temperature**|
|---|---|---|---|---|---|---|---|---|---|
||**-40 ˚C**|**-20 ˚C**|**0 ˚C**|**23 ˚C**|**40 ˚C**|**50 ˚C**|**60 ˚C**|**70 ˚C**|**85 ˚C**|
|||||||||||
|MF-LSMF030X|0.44|0.40|0.35|0.30|0.25|0.23|0.20|0.17|0.10|
|MF-LSMF050X|0.73|0.67|0.59|0.50|0.42|0.38|0.33|0.29|0.23|
|MF-LSMF075X|1.10|1.01|0.89|0.75|0.63|0.56|0.50|0.44|0.34|
|MF-LSMF075/60X|1.10|1.01|0.89|0.75|0.63|0.56|0.50|0.44|0.30|
|MF-LSMF110X|1.61|1.47|1.30|1.10|0.92|0.83|0.73|0.64|0.50|
|MF-LSMF110/60X|1.61|1.47|1.30|1.10|0.92|0.83|0.73|0.64|0.50|
|MF-LSMF125X|1.83|1.68|1.48|1.25|1.05|0.94|0.83|0.73|0.56|
|MF-LSMF125/33X|1.83|1.68|1.48|1.25|1.05|0.94|0.83|0.73|0.56|
|MF-LSMF150X|2.19|2.01|1.77|1.50|1.26|1.13|0.99|0.87|0.68|
|MF-LSMF150/33X|2.19|2.01|1.77|1.50|1.26|1.13|0.99|0.87|0.68|
|MF-LSMF185X|2.70|2.48|2.18|1.85|1.55|1.39|1.22|1.07|0.83|
|MF-LSMF185/24X|2.80|2.47|2.17|1.85|1.54|1.39|1.22|1.07|0.85|
|MF-LSMF185/33X|2.80|2.47|2.17|1.85|1.54|1.39|1.22|1.07|0.85|
|MF-LSMF200X|2.92|2.68|2.36|2.00|1.68|1.50|1.32|1.16|0.90|
|MF-LSMF200/24X|2.92|2.68|2.36|2.00|1.68|1.50|1.32|1.16|0.90|
|MF-LSMF260X|3.75|3.35|3.00|2.60|2.35|2.15|2.05|1.80|1.30|
|MF-LSMF260/6X|3.80|3.48|3.07|2.60|2.18|1.95|1.72|1.51|1.17|
|MF-LSMF260/16X|3.75|3.35|3.00|2.60|2.35|2.15|2.05|1.80|1.30|
|MF-LSMF300X|4.53|4.02|3.51|3.00|2.52|2.26|1.99|1.75|1.34|
|MF-LSMF300/16X|4.38|4.02|3.54|3.00|2.52|2.25|1.98|1.74|1.35|
|MF-LSMF300/24X|4.00|3.55|3.20|3.30|2.50|2.25|2.15|1.85|1.50|
|MF-LSMF330X|4.82|4.42|3.89|3.30|2.77|2.48|2.18|1.91|1.49|
|MF-LSMF330/12X|4.82|4.42|3.89|3.30|2.77|2.48|2.18|1.91|1.49|
|MF-LSMF330/16X|4.82|4.42|3.89|3.30|2.77|2.48|2.18|1.91|1.49|
|MF-LSMF330/24X|4.82|4.42|3.89|3.30|2.77|2.48|2.18|1.91|1.49|
|MF-LSMF400/16X|5.84|5.36|4.72|4.00|3.36|3.00|2.64|2.32|1.80|
|MF-LSMF500/16X|7.30|6.70|5.90|5.00|4.20|3.75|3.30|2.90|2.25|
|MF-LSMF600/12X|8.76|8.04|7.08|6.00|5.04|4.50|3.96|3.48|2.70|



Specifications are subject to change without notice. Users should verify actual device performance in their specific applications. The products described herein and this document are subject to specific legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf. 

## **MF-LSMF Series - PTC Resettable Fuses** 

## ~~**Product Dimensions**~~ 

**==> picture [505 x 27] intentionally omitted <==**

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A B C D E<br>Model<br>Min. Max. Min. Max. Min. Max. Min. Max. Min. Max.<br>**----- End of picture text -----**<br>


|**Model**|**A**|**A**|**A**|**B**|**B**|**B**|**B**|**C**|**C**|**C**|**C**|**D**|**D**|**D**|**D**|**E**|**E**|**E**|**E**|
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
||**Min.**|**Max.**||**Min.**||**Max.**||**Min.**||**Max.**||**Min.**||**Max.**||**Min.**||**Max.**||
|||||||||||||||||||||
|MF-LSMF030X|6.73<br>(0.265)||7.98<br>(0.314)||4.80<br>(0.189)||5.44<br>(0.214)||0.75<br>(0.030)||1.25<br>(0.049)||0.30<br>(0.012)||2.50<br>(0.098)||0.25<br>(.010)||2.00<br>(.079)|
|MF-LSMF050X|6.73<br>(0.265)||7.98<br>(0.314)||4.80<br>(0.189)||5.44<br>(0.214)||0.75<br>(0.030)||1.25<br>(0.049)|||||||||
|MF-LSMF075X|6.73<br>(0.265)||7.98<br>(0.314)||4.80<br>(0.189)||5.44<br>(0.214)||0.35<br>(0.014)||0.85<br>(0.033)|||||||||
|MF-LSMF075/60X|6.73<br>(0.265)||7.98<br>(0.314)||4.80<br>(0.189)||5.44<br>(0.214)||0.75<br>(0.030)||1.70<br>(0.067)|||||||||
|MF-LSMF110X|6.73<br>(0.265)||7.98<br>(0.314)||4.80<br>(0.189)||5.44<br>(0.214)||0.35<br>(0.014)||0.85<br>(0.033)|||||||||
|MF-LSMF110/60X|6.73<br>(0.265)||7.98<br>(0.314)||4.80<br>(0.189)||5.44<br>(0.214)||0.75<br>(0.030)||1.70<br>(0.067)|||||||||
|MF-LSMF125X|6.73<br>(0.265)||7.98<br>(0.314)||4.80<br>(0.189)||5.44<br>(0.214)||0.35<br>(0.014)||0.85<br>(0.033)|||||||||
|MF-LSMF125/33X|6.73<br>(0.265)||7.98<br>(0.314)||4.80<br>(0.189)||5.44<br>(0.214)||0.75<br>(0.030)||1.60<br>(0.063)|||||||||
|MF-LSMF150X|6.73<br>(0.265)||7.98<br>(0.314)||4.80<br>(0.189)||5.44<br>(0.214)||0.35<br>(0.014)||0.85<br>(0.033)|||||||||
|MF-LSMF150/33X|6.73<br>(0.265)||7.98<br>(0.314)||4.80<br>(0.189)||5.44<br>(0.214)||0.75<br>(0.030)||1.60<br>(0.063)|||||||||
|MF-LSMF185X|6.73<br>(0.265)||7.98<br>(0.314)||4.80<br>(0.189)||5.44<br>(0.214)||0.35<br>(0.014)||0.85<br>(0.033)|||||||||
|MF-LSMF185/24X|6.73<br>(0.265)||7.98<br>(0.314)||4.80<br>(0.189)||5.44<br>(0.214)||0.75<br>(0.030)||1.60<br>(0.063)|||||||||
|MF-LSMF185/33X|6.73<br>(0.265)||7.98<br>(0.314)||4.80<br>(0.189)||5.44<br>(0.214)||0.75<br>(0.030)||1.60<br>(0.063)|||||||||
|MF-LSMF200X|6.73<br>(0.265)||7.98<br>(0.314)||4.80<br>(0.189)||5.44<br>(0.214)||0.75<br>(0.030)||1.60<br>(0.063)|||||||||
|MF-LSMF200/24X|6.73<br>(0.265)||7.98<br>(0.314)||4.80<br>(0.189)||5.44<br>(0.214)||0.75<br>(0.030)||1.60<br>(0.063)|||||||||
|MF-LSMF260X|6.73<br>(0.265)||7.98<br>(0.314)||4.80<br>(0.189)||5.44<br>(0.214)||0.75<br>(0.030)||1.60<br>(0.063)|||||||||
|MF-LSMF260/6X|6.73<br>(0.265)||7.98<br>(0.314)||4.80<br>(0.189)||5.44<br>(0.214)||0.35<br>(0.014)||0.85<br>(0.033)|||||||||



MM DIMENSIONS: (INCHES) 

**==> picture [499 x 92] intentionally omitted <==**

**----- Start of picture text -----**<br>
Top View Bottom View Side View Terminal material:  Recommended Pad Layout<br> Electroless nickel under<br>A C immersion gold (ENIG)<br>9<br>5.3 ± 0.10<br>B (.209 ± .004)<br>X<br>2.0 ± 0.05 4.6 ± 0.10<br>D E (.079 ± .002) (.181 ± .004)<br>**----- End of picture text -----**<br>


Specifications are subject to change without notice. Users should verify actual device performance in their specific applications. The products described herein and this document are subject to specific legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf. 

## **MF-LSMF Series - PTC Resettable Fuses** 

## ~~**Product Dimensions (continued)**~~ 

**==> picture [505 x 27] intentionally omitted <==**

**----- Start of picture text -----**<br>
A B C D E<br>Model<br>Min. Max. Min. Max. Min. Max. Min. Max. Min. Max.<br>**----- End of picture text -----**<br>


|**Model**|**A**|**A**|**A**|**A**|**B**|**B**|**B**|**B**|**C**|**C**|**C**|**C**|**D**|**D**|**D**|**D**|**E**|**E**|**E**|**E**|
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
||**Min.**||**Max.**||**Min.**||**Max.**||**Min.**||**Max.**||**Min.**||**Max.**||**Min.**||**Max.**||
||||||||||||||||||||||
|MF-LSMF260/16X||6.73<br>(0.265)||7.98<br>(0.314)||4.80<br>(0.189)||5.44<br>(0.214)||0.75<br>(0.030)||1.60<br>(0.063)||0.30<br>(0.012)||2.50<br>(0.098)||0.25<br>(.010)||2.00<br>(.079)|
|MF-LSMF300X||6.73<br>(0.265)||7.98<br>(0.314)||4.80<br>(0.189)||5.44<br>(0.214)||0.35<br>(0.014)||0.85<br>(0.033)|||||||||
|MF-LSMF300/16X||6.73<br>(0.265)||7.98<br>(0.314)||4.80<br>(0.189)||5.44<br>(0.214)||0.75<br>(0.030)||1.60<br>(0.063)|||||||||
|MF-LSMF300/24X||6.73<br>(0.265)||7.98<br>(0.314)||4.80<br>(0.189)||5.44<br>(0.214)||0.75<br>(0.030)||1.60<br>(0.063)|||||||||
|MF-LSMF330X||6.73<br>(0.265)||7.98<br>(0.314)||4.80<br>(0.189)||5.44<br>(0.214)||0.35<br>(0.014)||0.85<br>(0.033)|||||||||
|MF-LSMF330/12X||6.73<br>(0.265)||7.98<br>(0.314)||4.80<br>(0.189)||5.44<br>(0.214)||0.75<br>(0.030)||1.60<br>(0.063)|||||||||
|MF-LSMF330/16X||6.73<br>(0.265)||7.98<br>(0.314)||4.80<br>(0.189)||5.44<br>(0.214)||0.75<br>(0.030)||1.60<br>(0.063)|||||||||
|MF-LSMF330/24X||6.73<br>(0.265)||7.98<br>(0.314)||4.80<br>(0.189)||5.44<br>(0.214)||0.75<br>(0.030)||1.60<br>(0.063)|||||||||
|MF-LSMF400/16X||6.73<br>(0.265)||7.98<br>(0.314)||4.80<br>(0.189)||5.44<br>(0.214)||0.75<br>(0.030)||1.60<br>(0.063)|||||||||
|MF-LSMF500/16X||6.73<br>(0.265)||7.98<br>(0.314)||4.80<br>(0.189)||5.44<br>(0.214)||0.75<br>(0.030)||1.60<br>(0.063)|||||||||
|MF-LSMF600/12X||6.73<br>(0.265)||7.98<br>(0.314)||4.80<br>(0.189)||5.44<br>(0.214)||0.75<br>(0.030)||1.60<br>(0.063)|||||||||



MM DIMENSIONS: (INCHES) 

## ~~**Typical Time to Trip at 23 °C**~~ 

**==> picture [319 x 166] intentionally omitted <==**

**----- Start of picture text -----**<br>
100<br>2<br>1 3 4<br>10<br>1<br>0.1<br>0.01<br>0.001<br>0.1 1 10 100<br>Fault Current (Amps)<br>Time to Trip (Seconds)<br>**----- End of picture text -----**<br>


- 1 MF-LSMF030X 2 MF-LSMF050X 3 MF-LSMF075/60X 4 MF-LSMF110/60X 

Specifications are subject to change without notice. Users should verify actual device performance in their specific applications. The products described herein and this document are subject to specific legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf. 

## **MF-LSMF Series - PTC Resettable Fuses** 

## ~~**Typical Time to Trip at 23 °C (continued)**~~ 

**==> picture [319 x 510] intentionally omitted <==**

**----- Start of picture text -----**<br>
100 C D<br>A F G<br>B E<br>10<br>1<br>0.1<br>0.01<br>0.001<br>1 10 100<br>Fault Current (Amps)<br>100<br>K L N P<br>J M O<br>10 Q<br>1<br>0.1<br>0.01<br>0.001<br>1 10 100<br>Fault Current (Amps)<br>100<br>R<br>I<br>H S<br>10<br>1<br>0.1<br>0.01<br>0.001<br>1 10 100<br>Time to Trip (Seconds)<br>Time to Trip (Seconds)<br>Time to Trip (Seconds)<br>**----- End of picture text -----**<br>


Fault Current (Amps) 

**==> picture [72 x 84] intentionally omitted <==**

**----- Start of picture text -----**<br>
A MF-LSMF075X<br>B MF-LSMF110X<br>C MF-LSMF125X<br>D MF-LSMF150X<br>E MF-LSMF185X<br>F MF-LSMF260/6X<br>G MF-LSMF330X<br>**----- End of picture text -----**<br>


J MF-LSMF125/33X K MF-LSMF150/33X L MF-LSMF200X, MF-LSMF200/24X M MF-LSMF260X, MF-LSMF260/16X N MF-LSMF300/16X O MF-LSMF400/16X P MF-LSMF500/16X Q MF-LSMF600/12X 

- H MF-LSMF185/24X, MF-LSMF185/33X I MF-LSMF300/24X R MF-LSMF300X S MF-LSMF330/12X, MF-LSMF330/16X, MF-LSMF330/24X 

The Time to Trip curves represent typical performance of a device in a simulated application environment. Actual performance in specific customer applications may differ from these values due to the influence of other variables. 

Specifications are subject to change without notice. Users should verify actual device performance in their specific applications. The products described herein and this document are subject to specific legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf. 

## **MF-LSMF Series - PTC Resettable Fuses** 

## ~~**Packaging Quantity**~~ 

**==> picture [506 x 319] intentionally omitted <==**

**----- Start of picture text -----**<br>
Model Unit Quantity (pcs.) Unit<br>MF-LSMF030X  MF-LSMF185/33X  MF-LSMF330/12X<br>MF-LSMF050X  MF-LSMF200X  MF-LSMF330/16X<br>MF-LSMF075/60X  MF-LSMF200/24X  MF-LSMF330/24X<br>MF-LSMF110/60X  MF-LSMF260X  MF-LSMF400/16X 4000 Reel<br>MF-LSMF125/33X  MF-LSMF260/16X  MF-LSMF500/16X<br>MF-LSMF150/33X  MF-LSMF300/16X  MF-LSMF600/12X<br>MF-LSMF185/24X  MF-LSMF300/24X<br>MF-LSMF075X  MF-LSMF150X  MF-LSMF300X<br>MF-LSMF110X  MF-LSMF185X  MF-LSMF330X 6000 Reel<br>MF-LSMF125X  MF-LSMF260/6X<br>Solder Reflow Recommendations<br>tp Notes:<br>TP • MF-LSMF models are intended for reflow soldering<br>RAMP-UP TCRITICAL ZONEL TO TP (including but not limited to heating plate, hot air, IR, nitrogen, and vapor phase).<br>TL • Wave soldering is permissible only if the device is on the<br>t L top of the PCB, opposite the heat source.<br>TS MAX. • Hand soldering is not recommended for these devices.<br>RAMP-DOWN • All temperatures refer to the topside of the device,<br>measured on the device body surface.<br>TS MIN. • If reflow temperatures exceed the recommended profile,<br>ts devices may not meet the published specifications.<br>PREHEAT • Compatible with Pb and Pb-free solder reflow profiles.<br>• Excess solder may cause a short circuit.<br>25 • Please refer to the Multifus e [®]  Polymer PTC Resettable<br>Fuse Soldering Recommendations document for more<br>t  25 °C TO PEAK<br>details.<br>Temperature<br>**----- End of picture text -----**<br>


## **Time** 

**==> picture [308 x 17] intentionally omitted <==**

**----- Start of picture text -----**<br>
Profile Feature Pb-Free Assembly<br>**----- End of picture text -----**<br>


|**Profile Feature**|**Pb-Free Assembly**|
|---|---|
|||
|Average Ramp-Up Rate (Tsmaxto Tp)|3 °C / second max.|
|PREHEAT:<br>Temperature Min. (Tsmin)<br>Temperature Max. (Tsmax)<br>Time (Tsminto Tsmax) (ts)|150 °C<br>200 °C<br>60~180 seconds|
|TIME MAINTAINED ABOVE:<br>Temperature (TL)<br>Time (tL)|217 °C<br>60~150 seconds|
|Peak Temperature (Tp)|260 °C|
|Time within 5 °C of Actual Peak Temperature (tp)|20~40 seconds|
|Ramp-Down Rate|6 °C / second max.|
|Time 25 °C to Peak Temperature|8 minutes max.|



Specifications are subject to change without notice. Users should verify actual device performance in their specific applications. The products described herein and this document are subject to specific legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf. 

## **MF-LSMF Series Tape and Reel Specifications** 

|**Tape Dimensions per EIA 481**|**Tape Dimensions per EIA 481**|**Tape Dimensions per EIA 481**|**Tape Dimensions per EIA 481**|**Tape Dimensions per EIA 481**|**MF-LSMF075X, MF-LSMF110/X,**<br>**MF-LSMF125X, MF-LSMF150X,**<br>**MF-LSMF185X, MF-LSMF260/6X,**<br>**MF-LSMF300X & MF-LSMF330X**|**MF-LSMF075X, MF-LSMF110/X,**<br>**MF-LSMF125X, MF-LSMF150X,**<br>**MF-LSMF185X, MF-LSMF260/6X,**<br>**MF-LSMF300X & MF-LSMF330X**|**MF-LSMF075X, MF-LSMF110/X,**<br>**MF-LSMF125X, MF-LSMF150X,**<br>**MF-LSMF185X, MF-LSMF260/6X,**<br>**MF-LSMF300X & MF-LSMF330X**|**MF-LSMF075X, MF-LSMF110/X,**<br>**MF-LSMF125X, MF-LSMF150X,**<br>**MF-LSMF185X, MF-LSMF260/6X,**<br>**MF-LSMF300X & MF-LSMF330X**|**MF-LSMF075X, MF-LSMF110/X,**<br>**MF-LSMF125X, MF-LSMF150X,**<br>**MF-LSMF185X, MF-LSMF260/6X,**<br>**MF-LSMF300X & MF-LSMF330X**|**MF-LSMF075X, MF-LSMF110/X,**<br>**MF-LSMF125X, MF-LSMF150X,**<br>**MF-LSMF185X, MF-LSMF260/6X,**<br>**MF-LSMF300X & MF-LSMF330X**|**MF-LSMF075X, MF-LSMF110/X,**<br>**MF-LSMF125X, MF-LSMF150X,**<br>**MF-LSMF185X, MF-LSMF260/6X,**<br>**MF-LSMF300X & MF-LSMF330X**|**MF-LSMF075X, MF-LSMF110/X,**<br>**MF-LSMF125X, MF-LSMF150X,**<br>**MF-LSMF185X, MF-LSMF260/6X,**<br>**MF-LSMF300X & MF-LSMF330X**|**MF-LSMF075X, MF-LSMF110/X,**<br>**MF-LSMF125X, MF-LSMF150X,**<br>**MF-LSMF185X, MF-LSMF260/6X,**<br>**MF-LSMF300X & MF-LSMF330X**|**MF-LSMF075X, MF-LSMF110/X,**<br>**MF-LSMF125X, MF-LSMF150X,**<br>**MF-LSMF185X, MF-LSMF260/6X,**<br>**MF-LSMF300X & MF-LSMF330X**|**MF-LSMF075X, MF-LSMF110/X,**<br>**MF-LSMF125X, MF-LSMF150X,**<br>**MF-LSMF185X, MF-LSMF260/6X,**<br>**MF-LSMF300X & MF-LSMF330X**|**MF-LSMF075X, MF-LSMF110/X,**<br>**MF-LSMF125X, MF-LSMF150X,**<br>**MF-LSMF185X, MF-LSMF260/6X,**<br>**MF-LSMF300X & MF-LSMF330X**|<br>**MF-LSMF030X, MF-LSMF050X, MF-LSMF075/60X,**<br>**MF-LSMF110/60X, MF-LSMF125/33X, MF-LSMF150/33X,**<br>**MF-LSMF185/24X, MF-LSMF185/33X, MF-LSMF200X,**<br>**MF-LSMF200/24X, MF-LSMF260X, MF-LSMF260/16X,**<br>**MF-LSMF300/16X, MF-LSMF300/24X, MF-LSMF330/12X,**<br>**MF-LSMF330/16X, MF-LSMF330/24X, MF-LSMF400/16X,**<br>**MF-LSMF500/16X & MF-LSMF600/12X**|<br>**MF-LSMF030X, MF-LSMF050X, MF-LSMF075/60X,**<br>**MF-LSMF110/60X, MF-LSMF125/33X, MF-LSMF150/33X,**<br>**MF-LSMF185/24X, MF-LSMF185/33X, MF-LSMF200X,**<br>**MF-LSMF200/24X, MF-LSMF260X, MF-LSMF260/16X,**<br>**MF-LSMF300/16X, MF-LSMF300/24X, MF-LSMF330/12X,**<br>**MF-LSMF330/16X, MF-LSMF330/24X, MF-LSMF400/16X,**<br>**MF-LSMF500/16X & MF-LSMF600/12X**|<br>**MF-LSMF030X, MF-LSMF050X, MF-LSMF075/60X,**<br>**MF-LSMF110/60X, MF-LSMF125/33X, MF-LSMF150/33X,**<br>**MF-LSMF185/24X, MF-LSMF185/33X, MF-LSMF200X,**<br>**MF-LSMF200/24X, MF-LSMF260X, MF-LSMF260/16X,**<br>**MF-LSMF300/16X, MF-LSMF300/24X, MF-LSMF330/12X,**<br>**MF-LSMF330/16X, MF-LSMF330/24X, MF-LSMF400/16X,**<br>**MF-LSMF500/16X & MF-LSMF600/12X**|<br>**MF-LSMF030X, MF-LSMF050X, MF-LSMF075/60X,**<br>**MF-LSMF110/60X, MF-LSMF125/33X, MF-LSMF150/33X,**<br>**MF-LSMF185/24X, MF-LSMF185/33X, MF-LSMF200X,**<br>**MF-LSMF200/24X, MF-LSMF260X, MF-LSMF260/16X,**<br>**MF-LSMF300/16X, MF-LSMF300/24X, MF-LSMF330/12X,**<br>**MF-LSMF330/16X, MF-LSMF330/24X, MF-LSMF400/16X,**<br>**MF-LSMF500/16X & MF-LSMF600/12X**|<br>**MF-LSMF030X, MF-LSMF050X, MF-LSMF075/60X,**<br>**MF-LSMF110/60X, MF-LSMF125/33X, MF-LSMF150/33X,**<br>**MF-LSMF185/24X, MF-LSMF185/33X, MF-LSMF200X,**<br>**MF-LSMF200/24X, MF-LSMF260X, MF-LSMF260/16X,**<br>**MF-LSMF300/16X, MF-LSMF300/24X, MF-LSMF330/12X,**<br>**MF-LSMF330/16X, MF-LSMF330/24X, MF-LSMF400/16X,**<br>**MF-LSMF500/16X & MF-LSMF600/12X**|<br>**MF-LSMF030X, MF-LSMF050X, MF-LSMF075/60X,**<br>**MF-LSMF110/60X, MF-LSMF125/33X, MF-LSMF150/33X,**<br>**MF-LSMF185/24X, MF-LSMF185/33X, MF-LSMF200X,**<br>**MF-LSMF200/24X, MF-LSMF260X, MF-LSMF260/16X,**<br>**MF-LSMF300/16X, MF-LSMF300/24X, MF-LSMF330/12X,**<br>**MF-LSMF330/16X, MF-LSMF330/24X, MF-LSMF400/16X,**<br>**MF-LSMF500/16X & MF-LSMF600/12X**|<br>**MF-LSMF030X, MF-LSMF050X, MF-LSMF075/60X,**<br>**MF-LSMF110/60X, MF-LSMF125/33X, MF-LSMF150/33X,**<br>**MF-LSMF185/24X, MF-LSMF185/33X, MF-LSMF200X,**<br>**MF-LSMF200/24X, MF-LSMF260X, MF-LSMF260/16X,**<br>**MF-LSMF300/16X, MF-LSMF300/24X, MF-LSMF330/12X,**<br>**MF-LSMF330/16X, MF-LSMF330/24X, MF-LSMF400/16X,**<br>**MF-LSMF500/16X & MF-LSMF600/12X**|
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|W||||||||16.0 ± 0.30<br>(0.630 ± 0.012)|||||||||||16.0 ± 0.30<br>(0.630 ± 0.012)|||||
|P0||||||||4.0 ± 0.10<br>(0.157 ± 0.004)|||||||||||4.0 ± 0.10<br>(0.157 ± 0.004)|||||
|10 P0||||||||40 ± 0.20<br>(1.575 ± 0.008)|||||||||||40 ± 0.20<br>(1.575 ± 0.008)|||||
|P1||||||||8.0 ± 0.10<br>(0.315 ± 0.004)|||||||||||8.0 ± 0.10<br>(0.315 ± 0.004)|||||
|P2||||||||2.0 ± 0.10<br>(0.079 ± 0.004)|||||||||||2.0 ± 0.10<br>(0.079 ± 0.004)|||||
|A0||||||||5.74 ± 0.10<br>(0.226 ± 0.004)|||||||||||5.70 ± 0.10<br>(0.224 ± 0.004)|||||
|B0||||||||8.02 ± 0.10<br>(0.316 ± 0.004)|||||||||||8.10 ± 0.10<br>(0.319 ± 0.004)|||||
|B1 max.||||||||||12.1<br>(0.476)||||||||||12.1<br>(0.476)||||
|D0||||||||1.5 +0.10/-0<br>(0.059 +0.004/-0)||||||||||(|1.5 +0.10/-0<br>0.059 +0.004/-0)|||||
|F||||||||7.5 ± 0.10<br>(0.295 ± 0.004)|||||||||||7.5 ± 0.10<br>(0.295 ± 0.004)|||||
|E1||||||||1.75 ± 0.10<br>(0.069 ± 0.004)|||||||||||1.75 ± 0.10<br>(0.069 ± 0.004)|||||
|E2 min.||||||||||14.25<br>(0.561)||||||||||14.25<br>(0.561)||||
|T max.||||||||||0.6<br>(0.024)||||||||||0.6<br>(0.024)||||
|T1 max||||||||||0.1<br>(0.004)||||||||||0.1<br>(0.004)||||
|K0||||||||0.91 ± 0.10<br>(0.036 ± 0.004)|||||||||||1.70 ± 0.10<br>(0.067 ± 0.004)|||||
|Leader min.||||||||||390<br>(15.35)||||||||||390<br>(15.35)||||
|Trailer min.||||||||||160<br>(6.30)||||||||||160<br>(6.30)||||
|**Reel Dimensions**||||||||||||||||||||||||
|A max.||||||||||331<br>(13.03)||||||||||331<br>(13.03)||||
|N min.||||||||||50<br>(1.97)||||||||||50<br>(1.97)||||
|W1||||||||16.4 +2.0/-0<br>(0.646 + 0.079/-0)||||||||||(|16.4 +2.0/-0<br>0.646 + 0.079/-0)|||||
|W2 max.||||||||||22.4<br>(0.882)||||||||||22.4<br>(0.882)||||
|B1<br>K0||T<br>COVER<br>TAPE<br>T1<br>D0||||||||P|||||||B0<br>F<br>E2<br>E1<br>W|||DIMENSIONS:<br>MM<br>(INCHES)<br>N(HUB DIA.)<br>(MEASURED<br>AT HUB)<br>W2<br>(MEASURED<br>AT HUB)<br>W1||||
||||R<br><br>D0|||||P2||0|||||||E1|||||||
|||C<br><br>T||||||||||||||||A||||W2||
|||||||||||||||||||||||||
|||||||||||||||||||||||||
||B1|||||||||||||||||||||N<br>W1||
|||||||||||||||||||||||||
||K0|||||||||||||||||||||||
||||||A0||P1|||||||||||||||||
|||||||||||||||||||||||||



MF-LSMF SERIES, REV. L, 11/23 

Specifications are subject to change without notice. Users should verify actual device performance in their specific applications. 

The products described herein and this document are subject to specific legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf. 

## **3312 - 2 mm SMD Trimming PotentiometerBourns[®] Multifuse[®] PPTC Resettable Fuses** 

## ~~**Application Notice**~~ 

- Users are responsible for independent and adequate evaluation of Bourns[®] Multifuse[®] Polymer PTC devices in the user’s application, including the PPTC device characteristics stated in the applicable data sheet. 

- Polymer PTC devices must not be allowed to operate beyond their stated maximum ratings. Operation in excess of such maximum ratings could result in damage to the PTC device and possibly lead to electrical arcing and/or fire. Circuits with inductance may generate a voltage above the rated voltage of the polymer PTC device and should be thoroughly evaluated within the user’s application during the PTC selection and qualification process. 

- Polymer PTC devices are intended to protect against adverse effects of temporary overcurrent or overtemperature conditions up to rated limits and are not intended to serve as protective devices where overcurrent or overvoltage conditions are expected to be repetitive or prolonged. 

- In normal operation, polymer PTC devices experience thermal expansion under fault conditions. Thus, a polymer PTC device must be protected against mechanical stress, and must be given adequate clearance within the user’s application to accommodate such thermal expansion. Rigid potting materials or fixed housings or coverings that do not provide adequate clearance should be thoroughly examined and tested by the user, as they may result in the malfunction of polymer PTC devices if the thermal expansion is inhibited. 

- Exposure to lubricants, silicon-based oils, solvents, gels, electrolytes, acids, and other related or similar materials may adversely affect the performance of polymer PTC devices. 

- Aggressive solvents may adversely affect the performance of polymer PTC devices. Conformal coating, encapsulating, potting, molding, and sealing materials may contain aggressive solvents including but not limited to xylene and toluene, which are known to cause adverse effects on the performance of polymer PTCs. Such aggressive solvents must be thoroughly cured or baked to ensure their complete removal from polymer PTCs to minimize the possible adverse effect on the device. 

- Recommended storage conditions should be followed at all times. Such conditions can be found on the applicable data sheet and on the Multifuse[®] Polymer PTC Moisture/Reflow Sensitivity Classification (MSL) note: - 

- https://www.bourns.com/docs/RoHS MSL/msl_mf.pdf 

_MFAN 12/18_ Specifications are subject to change without notice. Users should verify actual device performance in their specific applications. The products described herein and this document are subject to specific legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf. 

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## Links

- [View this product on Novapart](https://novapart.co/products/MF-LSMF050X-2/resettable-fuse-pptc-2920-7451-metric-mf-lsmf)
- [Request a quote for this part](https://novapart.co/quote/)
- [Supplier page](https://es.farnell.com/bourns/mf-lsmf050x-2/pptc-resettable-fuse-40a-60v-2920/dp/4308716)
---

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