# Resettable Fuse, PPTC, 1812 (4532 Metric), MF-MSHT, 42 V, 200 mA, 1 A, 0.1 s

![Product image](https://novapart.co/image/farnell:3648632/)

**URL**: https://novapart.co/products/MF-MSHT020KX-2/resettable-fuse-pptc-1812-4532-metric-mf-msht-42-v
**SKU**: MF-MSHT020KX-2
**Manufacturer**: BOURNS
**Category**: Circuit Protection || Thermistors || Resettable Fuses || Surface Mount PPTCs
**Price**: €0.4700
**Stock**: 10+

## Specifications

| Parameter | Value |
|---|---|
| Svhc | No SVHC (27-Jun-2024) |
| Time To Trip | 0.1s |
| Trip Current | 1A |
| Product Range | MF-MSHT |
| Voltage Rating | 42V |
| Holding Current | 200mA |
| Pptc Case Style | 1812 (4532 Metric) |
| Current Rating Max | 40A |
| Operating Temperature Max | 125°C |
| Operating Temperature Min | -40°C |
| Automotive Qualification Standard | AEC-Q200 |

## Datasheet

📄 [Download PDF](https://novapart.co/datasheet/farnell:3648632/)

## **Features** 

**==> picture [119 x 49] intentionally omitted <==**

**----- Start of picture text -----**<br>
AUTOMOTIVE<br>*RoHS and GRADE<br>AEC-Q200 COMPLIANT<br>**----- End of picture text -----**<br>


- n High power ratings with higher hold currents at elevated temperatures 

- n Operating temperature range from -40 °C to 125 °C 

- n Low thermal derating factor 

n Standard 1812 footprint size 

- n Compliant with AEC-Q200 Rev-D Stress Test Qualification for Passive Components in automotive applications 

- n Surface mount packaging for automated assembly 

- n Agency recognition: 

- n RoHS compliant* 

## **MF-MSHT Series – PTC Resettable Fuses** BOURNS ~~(i~~ 

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

Click these links for more information: 

PRODUCT 

TECHNICAL INVENTORY SAMPLES LIBRARY 

## ~~**Electrical Characteristics**~~ 

|**Model**<br>~~SLL~~<br>~~pot—“<ié‘iYSC“(~~|**Vmax**<br>~~SLL~~|**Imax**<br>~~SLL ER]~~|**Ihold**<br>~~ER]~~|**Itrip**<br>~~ER]~~|**Resistance**<br>~~ER]~~|**Resistance**<br>~~ER]~~|**Max. Time**<br>**To Trip**<br>~~ER]~~|**Max. Time**<br>**To Trip**<br>~~ER]~~|**Tripped**<br>**Power**<br>**Dissipation**<br>~~ER]~~|**Agency Recognition**|**Agency Recognition**|**AEC-Q200**<br>**Compliant**|
|---|---|---|---|---|---|---|---|---|---|---|---|---|
||||**at 23 °C**<br>~~ER]~~||**at 23 °C**<br>**Ohms**<br>~~ER]~~||**at 23 °C**<br>~~ER]~~||**at 23 °C**<br>**Watts**<br>~~ER]~~|**cUL**|**TÜV**||
||Volts<br>~~SLL~~<br>~~pot—“<ié‘iYSC“(ee~~|Amps<br>~~SLL ER]~~<br>~~ee~~|Amps<br>~~ER]~~<br>~~ee~~||RMin.<br>~~ER]~~<br>~~ee~~|R1Max.**<br>~~ER]~~|Amps<br>~~ER]~~|Seconds<br>~~ER]~~|Typical<br>~~ER]~~|E174545|R 50384138||
|MF-MSHT020KX<br>~~SLL~~<br>~~pot—“<ié‘iYSC“(~~<br>~~potT~~|42<br>~~SLL~~<br>~~pot—“<ié‘iYSC“(ee~~<br>~~tT~~|40<br>~~SLL ER]~~<br>~~ee~~<br>~~tT~~|0.20<br>~~ER]~~<br>~~ee~~<br>~~tT~~|1.0<br>~~ER]~~<br>~~ee~~|0.5<br>~~ER]~~<br>~~ee~~|4.5<br>~~ER]~~|8.0<br>~~ER]~~|0.1<br>~~ER]~~|1.2<br>~~ER]~~|3|3|3|
|MF-MSHT035KX<br>~~pot—“<ié‘iYSC“(~~<br>~~potT~~<br>~~po~~|36<br>~~pot—“<ié‘iYSC“(ee~~<br>~~tT~~|40<br>~~ee~~<br>~~tT~~|0.35<br>~~ee~~<br>~~tT~~|1.75<br>~~ee~~|0.3<br>~~ee~~|2.6|8.0|0.1|1.2|3|3|3|
|MF-MSHT050KX<br>~~po tT~~<br>~~po~~<br>~~po~~|30<br>~~tT~~|40<br>~~tT~~|0.50<br>~~tT~~|2.5|0.18|1.6|8.0|0.1|1.2|3|3|3|
|MF-MSHT075KX<br>~~po~~<br>~~po~~<br>~~po~~|30|40|0.75|3.75|0.09|0.85|8.0|5.0|1.5|3|3|3|
|MF-MSHT110KX<br>~~po~~<br>~~po~~<br>~~po~~|16|40|1.10|5.5|0.05|0.45|8.0|5.0|1.5|3|3|3|
|MF-MSHT125KX<br>~~po~~<br>~~po~~<br>~~Pport—“‘é‘iYSCT~~|9<br>~~ort—“‘é‘iYSCT~~|40<br>~~ort—“‘é‘iYSCT~~|1.25|6.25|0.03|0.30|8.0|5.0|1.5|3|pending|3|
|MF-MSHT150KX<br>~~po~~<br>~~Pport—“‘é‘iYSCT~~|9<br>~~ort—“‘é‘iYSCT~~|40<br>~~ort—“‘é‘iYSCT~~|1.50|6.0|0.022|0.20|10.0|5.0|1.5|3|pending|3|
|MF-MSHT175KX<br>~~Pp ort—“‘é‘iYSCT~~<br>~~ee~~|9<br>~~ort—“‘é‘iYSCT~~<br>~~ee~~|40<br>~~ort—“‘é‘iYSCT~~<br>~~GG~~|1.75<br>~~GG~~|7.0<br>~~GG~~|0.018<br>~~GG~~|0.17<br>~~GG~~|10.0<br>~~GG~~|5.0<br>~~GG~~|1.5<br>~~GG~~|3<br>~~GG~~|pending|3|



**R1Max. measured 24 hours post reflow 

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

|**Item**|**Condition**|**Criteria**|
|---|---|---|
|OperatingTemperature|-40 °C to +125 °C||
|Recommended Storage|+40 °C max. / 70 % R.H. max.||
|Passive Aging|+125 °C,1000 hours|R < R1max|
|HumidityAging|+85 °C,85 % R.H. 1000 hours|R < R1max|
|Thermal Shock|-40 °C to +125 °C,20 times|R < R1max|
|Solvent Resistance|MIL-STD-202,Method 215|No change(markingstill legible)|
|Vibration|MIL-STD-883C,Method 2007.1 Condition A|No change(Rmin< R < R1max)|
|Moisture SensitivityLevel(MSL)|See Note||
|ESD Classification|Class 6(per AEC-Q200-2,HBM)||



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

|**Item**|**Test Condition**|**Accept/Reject Criteria**|
|---|---|---|
|Visual/Mechanical|Verifydimensions and materials|Per MFphysical 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|
|TripCycle Life|Vmax,Imax,100 cycles|No arcingor burning|
|TripEndurance|Vmax,48 hours|No arcingor burning|
|Solderability|245 °C ±5 °C,5 seconds|95 % min. coverage|



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

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 Overcurrent surge protection of electronic equipment required to operate at high operating temperature ranges 

- n Robust resettable fault protection for industrial transportation, communication, security, and consumer electronic equipment 

## **MF-MSHT Series – PTC Resettable Fuses** 

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

**==> picture [483 x 81] intentionally omitted <==**

**----- Start of picture text -----**<br>
Top View Side View Bottom View Terminal Material:  Recommended Pad Layout<br>ENIG-plated terminals<br>A C D E<br>MARKING B (.116)2.95<br>1.68 3.10 1.68<br>(.066) (.122) (.066)<br>**----- End of picture text -----**<br>


|**Model**||**A**|**A**|||**B**|**B**|||**C**|**C**|||**D**||**E**|
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|||Min.||Max.||Min.||Max.||Min.||Max.||Min.||Min.|
|MF-MSHT020KX||4.37<br>(.172)||4.83<br>(.190)||3.07<br>(.121)||3.41<br>(.134)||0.40<br>(.016)||0.85<br>(.033)||0.30<br>(.012)||0.05<br>(.002)|
|MF-MSHT035KX|||||||||||||||||
|MF-MSHT050KX|||||||||||||||||
|MF-MSHT075KX|||||||||||||||||
|MF-MSHT110KX||4.37<br>(.172)||4.83<br>(.190)||3.07<br>(.121)||3.41<br>(.134)||0.60<br>(.024)||1.20<br>(.047)|||||
|MF-MSHT125KX||4.37<br>(.172)||4.83<br>(.190)||3.07<br>(.121)||3.41<br>(.134)||0.80<br>(.031)||1.60<br>(.063)|||||
|MF-MSHT150KX|||||||||||||||||
|MF-MSHT175KX|||||||||||||||||



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

|**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**|**Ambient Operating Temperature**|
|---|---|---|---|---|---|---|---|---|---|---|
||**-40 °C**|**-20 °C**|**0 °C**|**+23 °C**|**+40 °C**|**+50 °C**|**+60 °C**|**+70 °C**|**+85 °C**|**+125 °C**|
|MF-MSHT020KX|0.29|0.26|0.23|0.20|0.18|0.16|0.15|0.13|0.11|0.05|
|MF-MSHT035KX|0.51|0.46|0.41|0.35|0.31|0.28|0.26|0.23|0.20|0.09|
|MF-MSHT050KX|0.73|0.66|0.58|0.50|0.44|0.41|0.37|0.34|0.28|0.14|
|MF-MSHT075KX|1.09|0.98|0.87|0.75|0.66|0.61|0.56|0.50|0.42|0.20|
|MF-MSHT110KX|1.60|1.44|1.28|1.10|0.97|0.89|0.81|0.74|0.62|0.30|
|MF-MSHT125KX|1.81|1.64|1.45|1.25|1.10|1.01|0.93|0.84|0.70|0.34|
|MF-MSHT150KX|2.18|1.97|1.74|1.50|1.32|1.22|1.11|1.01|0.84|0.41|
|MF-MSHT175KX|2.54|2.29|2.03|1.75|1.54|1.42|1.30|1.17|0.98|0.47|



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-MSHT Series – PTC Resettable Fuses** 

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

**==> picture [278 x 195] intentionally omitted <==**

**----- Start of picture text -----**<br>
10<br>H<br>G<br>1<br>A F<br>B C E<br>D<br>A - MF-MSHT020KX<br>0.1 B - MF-MSHT035KX<br>C - MF-MSHT050KX<br>D - MF-MSHT075KX<br>E - MF-MSHT110KX<br>0.01 F - MF-MSHT125KX<br>G - MF-MSHT150KX<br>H - MF-MSHT175KX<br>0.001<br>0.1 1 10 100<br>Time to Trip (Seconds)<br>**----- End of picture text -----**<br>


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. 

Fault Current (Amps) 

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

**MF - MSHT 035 K X - 2** 

Multifuse[®] Product Designator Series 

MSHT = 1812 High Temperature Surface Mount Component Hold Current, Ihold 020 - 175 (0.2 - 1.75 Amps) K = Material Specific Code X = Multifuse[®] freeXpansion[™] Design Packaging 

- -2 = Tape and Reel Packaged per EIA-481 

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

|~~**Packaging Quantity**~~||
|---|---|
|**Model**|**Packaging Quantity**|
|MF-MSHT020KX|2,000pcs.per reel|
|MF-MSHT035KX|2,000pcs.per reel|
|MF-MSHT050KX|2,000pcs.per reel|
|MF-MSHT075KX|2,000pcs.per reel|
|MF-MSHT110KX|1,500pcs.per reel|
|MF-MSHT125KX|1,000pcs.per reel|
|MF-MSHT150KX|1,500pcs.per reel|
|MF-MSHT175KX|1,500pcs.per reel|



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

Represents total content. Layout may vary. 

**PART IDENTIFICATION:** MF-MSHT020KX = 02 MF-MSHT035KX = 03 MF-MSHT050KX = 05 07 MF-MSHT075KX = 07MF-MSHT110KX = 11 MF-MSHT125KX = 12 MF-MSHT150KX = 15 MF-MSHT175KX = 17 C **Bi-WEEKLY DATE CODE:** WEEKS 05-06 = C 

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-MSHT Series – PTC Resettable Fuses** 

## ~~**Solder Reflow Recommendations**~~ 

## **Notes:** 

|TP<br>TL<br>25<br>Ts max<br>Ts min<br>**Temperature**||||tp|TP<br><br>T<br>TO<br>L<br>t L<br>CRITICAL ZONE<br>RAMP-DOWN|TP<br><br>T<br>TO<br>L<br>t L<br>CRITICAL ZONE<br>RAMP-DOWN|TP<br><br>T<br>TO<br>L<br>t L<br>CRITICAL ZONE<br>RAMP-DOWN|
|---|---|---|---|---|---|---|---|
|||RAMP-UP||||||
|||||||||
|||||||||
|||||||||
|||||||||
|||||||||
|||t  25 °C TO PEAK||||||
|||||||||
|||**Time**||||||
|||||||||
|||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.|



- All temperatures refer to the topside of the device, measured on the device body surface. 

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

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-MSHT Series – PTC Resettable Fuses** 

## ~~**Packaging Dimensions**~~ 

**==> picture [489 x 353] intentionally omitted <==**

**----- Start of picture text -----**<br>
18.4*<br>MAX.<br>(.72)<br>185<br>(7.28)<br>DIA. MAX.<br>50<br>(1.97)<br>DIA. MIN.<br>12.4 +2.0/-0*<br>(.049 +.008/-0)<br>*MEASURED AT HUB<br>40.0 ± 0.20<br>(1.575 ± .008)<br>10 SPROCKET HOLES<br>0.6 4.00 ± 0.10 2.00 ± 0.05 1.75 ± 0.10<br>(.024) (.157 ± .004) (.079 ± .002) (.069 ± .004)<br>MAX. 1.50 +0.10/-0<br>(.059 +.004/-0)<br>DIA.<br>5.50 ± 0.05<br>COVER<br>TAPE (.217 ± .002) 10.25<br>5.90 (.404)<br>(.232) B0 TYP.<br>MAX. 12.00 ± 0.30<br>(.472 ± .012)<br>(.004)0.1 MAX. (.315 ± .004)8.00 ± 0.10 A0 LEADER<br>K0 TRAILER COMPONENTS NO COMPONENT<br>160 390<br>(6.30) (15.35)<br>MIN. USER DIRECTION OF FEED MIN.<br>07 07 07<br>C C C<br>**----- End of picture text -----**<br>


|**Model**||**A0**||**B0**||**K0**|
|---|---|---|---|---|---|---|
|MF-MSHT020KX<br>~ MF-MSHT075KX||3.66 ± 0.15<br>(.144 ± .006)||4.98 ± 0.10<br>(.196 ± .004)||0.95 ± 0.10<br>(.037 ± .004)|
|MF-MSHT110KX||3.58 ± 0.10<br>(.141 ± .004)||4.93 ± 0.10<br>(.194 ± .004)||1.30 ± 0.10<br>(.051 ± .004)|
|MF-MSHT125KX||3.50 ± 0.10<br>(.138 ± .004)||4.90 ± 0.10<br>(.193 ± .004)||1.80 ± 0.10<br>(.071 ± .004)|
|MF-MSHT150KX<br>~ MF-MSHT175KX||3.70 ± 0.10<br>(.146 ± .004)||5.10 ± 0.10<br>(.201 ± .004)||1.50 ± 0.10<br>(.059 ± .004)|



MM DIMENSIONS: (INCHES) 

MF-MSHT SERIES, REV. A, 01/21 

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. 

® 

## **Legal Disclaimer Notice** 

This legal disclaimer applies to purchasers and users of Bourns[®] products manufactured by or on behalf of Bourns, Inc. and 

Unless otherwise expressly indicated in writing, Bourns[®] products and data sheets relating thereto are subject to change 

and complete before placing orders for Bourns[®] products. 

The characteristics and parameters of a Bourns[®] product set forth in its data sheet are based on laboratory conditions, and statements regarding the suitability of products for certain types of applications are based on Bourns’ knowledge of typical requirements in generic applications.  The characteristics and parameters of a Bourns[®] product in a user application may 

® product with other components ® 

the actual performance of the Bourns[®] 

® product as meeting the requirements of a particular industry 

failure of an individual Bourns ® product to meet the requirements of such industry standard or particular qualification. Users of Bourns[®] products are responsible for ensuring compliance with safety-related requirements and standards applicable to 

Bourns[®] 

on a case-by-case basis, use of any Bourns[®] 

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® 

® 

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the user’s sole risk. 

and the user for which such Bourns[®] custom and the user regarding the use and level of also apply to such Bourns[®] custom products. 

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Users shall not sell, transfer, export or re-export any Bourns[®] 

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regulations. Further, Bourns ® products and Bourns technology and technical data may not under any circumstance be exported or re-exported to countries subject to international sanctions or embargoes.  Bourns[®] products may not, without 

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## Links

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---

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