MF-LR900/20-0

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## **Features** 

n Axial leaded 

n Weldable nickel terminals 

n Very low internal resistance n Operating currents to 9.0 amps n RoHS compliant* n Agency recognition: 

## **Applications** 

Any application that requires protection at low resistances: 

n Rechargeable battery pack protection n Cellular phones 

n Laptop computers 

|**Model**<br>~~SS~~<br>~~i~~|**Vmax**<br>~~SS~~|**Imax**<br>~~SS~~|**Ihold**<br>~~SS~~|**Itrip**<br>~~SS~~|**Initial**<br>**Resistance**<br>~~SS~~|**Initial**<br>**Resistance**<br>~~SS~~|**1 Hour**<br>**Post-Trip**<br>**Resistance**<br>~~SS~~|**Max. Time**<br>**to Trip**<br>~~SS~~|**Max. Time**<br>**to Trip**<br>~~SS~~|**Tripped**<br>**Power**<br>**Dissipation**<br>~~SS~~|**Agency Recognition**<br>~~SS~~|**Agency Recognition**<br>~~SS~~|
|---|---|---|---|---|---|---|---|---|---|---|---|---|
||||**at 23 °C**<br>~~SS~~||**at 23 °C**<br>**(Ohms)**<br>~~SS~~||**at 23 °C**<br>**(Ohms)**<br>~~SS~~|**at 23 °C**<br>~~SS~~||**at 23 °C**<br>**(Watts)**<br>~~SS~~|**cUL**<br>~~SS~~|**TÜV**<br>~~SS~~|
||**Volts**<br>~~SS~~<br>~~i~~|**Amps**<br>~~SS~~<br>~~ee~~|**Amps**<br>~~SS~~<br>~~ss~~|**Amps**<br>~~SS~~<br>~~ss~~|**Rmin**<br>~~SS~~<br>~~GG~~|**Rmax**<br>~~SS~~<br>~~GG~~|**R1max.**<br>~~SS~~<br>~~GG~~|**Amps**<br>~~SS~~|**Seconds**<br>~~SS~~|**Typ.**<br>~~SS~~|E174545<br>~~SS~~|R50410733<br>~~SS~~|
|MF-LR190<br>~~i~~<br>~~ee a~~|15<br>~~i~~<br>~~a~~|100<br>~~ee~~<br>~~ee~~|1.9<br>~~ss~~<br>~~ss~~|3.9<br>~~ss~~<br>~~ss~~|0.039<br>~~GG~~<br>~~ss~~|0.072<br>~~GG~~<br>~~GG~~|0.102<br>~~GG~~<br>~~GG~~|9.5<br>~~GG~~|5.0|1.2|3|3|
|MF-LR260<br>~~i~~<br>~~ee a~~<br>~~PoE~~|15<br>~~i ~~<br>~~a~~<br>~~PoE~~|100<br> ~~ee ~~<br>~~ee~~|2.6<br> ~~ss~~<br>~~ss~~|5.8<br>~~ss ~~<br>~~ss~~|0.020<br> ~~GG~~<br>~~ss~~|0.042<br>~~GG~~<br>~~GG~~|0.083<br>~~GG~~<br>~~GG~~|13.0<br>~~GG~~|5.0|1.3|3|3|
|MF-LR380<br>~~ee a~~<br>~~PoE~~<br>~~Re a~~|15<br>~~a ~~<br>~~PoE~~<br>~~a~~|100<br> ~~ee ~~<br>~~es~~|3.8<br> ~~ss~~<br>~~es~~|8.3<br>~~ss~~|0.013<br>~~ss~~<br>~~eG~~|0.026<br>~~GG~~<br>~~eG~~|0.037<br>~~GG~~<br>~~GG~~|19.0<br>~~GG~~<br>~~GG~~|5.0|2.5|3|3|
|MF-LR450<br>~~PoE~~<br>~~Re a~~<br>~~PoE~~|16<br>~~PoE~~<br>~~a~~<br>~~PoE~~|100<br>~~es~~<br>~~PoE~~|4.5<br>~~es~~|8.9|0.011<br>~~eG~~|0.020<br>~~eG~~|0.028<br>~~GG~~|22.5<br>~~GG~~|5.0|1.4|3|3|
|MF-LR550<br>~~Re a~~<br>~~PoE~~<br>~~a~~|10<br>~~a~~<br>~~PoE~~<br>~~a~~|100<br>~~es~~<br>~~PoE~~<br>~~ee~~|5.5<br>~~es~~<br>~~es~~|10.5<br>~~es~~|0.009<br>~~eG~~<br>~~es~~|0.016<br>~~eG ~~<br>~~Gs~~|0.022<br> ~~GG~~<br>~~sO~~|27.5<br>~~GG~~<br>~~sO~~|5.0|1.4|3|3|
|MF-LR550/20<br>~~PoE~~<br>~~a~~<br>~~Re~~|20<br>~~PoE~~<br>~~a~~<br>~~es~~|100<br>~~PoE~~<br>~~ee~~<br>~~es~~|5.5<br>~~es~~<br>~~es~~|10.5<br>~~es~~<br>~~eG~~|0.009<br>~~es~~<br>~~eG~~|0.016<br>~~Gs~~<br>~~eG~~|0.022<br>~~sO~~<br>~~DG~~|27.5<br>~~sO~~<br>~~DG~~|5.0|1.4|3|Pending|
|MF-LR600<br>~~a ~~<br>~~Re~~<br>~~ee a~~|10<br> ~~a~~<br>~~es~~<br>~~a~~|100<br>~~ee ~~<br>~~es~~<br>~~ee~~|6.0<br> ~~es~~<br>~~es~~<br>~~ss~~|11.7<br>~~es~~<br>~~eG~~<br>~~ss~~|0.007<br>~~es~~<br>~~eG~~<br>~~ss~~|0.014<br>~~Gs~~<br>~~eG~~<br>~~GG~~|0.019<br>~~sO~~<br>~~DG~~<br>~~GG~~|30.0<br>~~sO~~<br>~~DG~~<br>~~GG~~|5.0|2.8|3|3|
|MF-LR730<br>~~Re~~<br>~~ee a~~<br>~~PoE~~|10<br>~~es~~<br>~~a~~<br>~~PoE~~|100<br>~~es~~<br>~~ee~~|7.3<br>~~es~~<br>~~ss~~|14.1<br>~~eG~~<br>~~ss~~|0.006<br>~~eG~~<br>~~ss~~|0.012<br>~~eG~~<br>~~GG~~|0.015<br>~~DG~~<br>~~GG~~|30.0<br>~~DG~~<br>~~GG~~|5.0|3.0|3|3|
|MF-LR730/20<br>~~ee a~~<br>~~PoE~~<br>~~Pot~~|20<br>~~a ~~<br>~~PoE~~<br>~~Pot~~|100<br> ~~ee ~~|7.3<br> ~~ss~~<br>~~ee~~|14.1<br>~~ss~~<br>~~ee~~|0.006<br>~~ss~~|0.012<br>~~GG~~|0.015<br>~~GG~~|30.0<br>~~GG~~|5.0|3.0|3|Pending|
|MF-LR900/20<br>~~PoE~~<br>~~Pot~~|20<br>~~PoE~~<br>~~Pot~~|100|9.0<br>~~ee~~|16.7<br>~~ee~~|0.006|0.010|0.014|45.0|5.0|3.0|3|Pending|



~~**Environmental Characteristics Additional Information**~~ **Item Condition Criteria** Operating Temperature -40 °C to +85 °C Recommended Storage +40 °C max. / 70 % R.H. max. PRODUCT TECHNICAL INVENTORY SELECTOR LIBRARY ±10 % typical resistance Passive Aging +70 °C, 1000 hours change ±10 % typical resistance Humidity Aging +85 °C, 85 % R.H. 7 days change MIL-STD-883C, Method 2007.1 Vibration Condition A Rmin ≤ R ≤ R1max Moisture Sensitivity Level See Note (MSL) ESD Classification Class 6 (per AEC-Q200-2, HBM) ~~===~~ ~~**Test Procedures and Requirements**~~ **Test Test Conditions Accept/Reject Criteria** Visual/Mech. .................................................... Verify dimensions and materials .......................Per MF physical description Resistance ....................................................... In still air @ 23 °C .............................................Rmin ≤ R ≤ R1max Time to Trip ...................................................... At specified current, Vmax, 23 °C .....................T ≤ max. time to trip (seconds) Hold Current .................................................... 30 min. at Ihold .................................................No trip Trip Cycle Life .................................................. Vmax, Imax, 100 cycles ....................................No arcing or burning Trip Endurance ................................................ Vmax, 48 hours .................................................No arcing or burning 

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

Click these links for more information: 

PRODUCT TECHNICAL INVENTORY SAMPLES CONTACT SELECTOR LIBRARY 

*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 

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

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

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Ambient Operating Temperature<br>Model<br>-40 ºC -20 ºC 0 ºC 23 ºC 40 ºC 50 ºC 60 ºC 70 ºC 85 ºC<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 ºC**|**-20 ºC**|**0 ºC**|**23 ºC**|**40 ºC**|**50 ºC**|**60 ºC**|**70 ºC**|**85 ºC**|
|||||||||||
|MF-LR190|2.8|2.5|2.3|1.9|1.6|1.5|1.4|1.2|1.0|
|MF-LR260|3.8|3.4|3.1|2.6|2.2|2.0|1.9|1.7|1.4|
|MF-LR380|5.5|4.9|4.4|3.8|3.3|3.0|2.8|2.5|2.1|
|MF-LR450|6.5|5.8|5.3|4.5|3.9|3.6|3.3|2.9|2.5|
|MF-LR550|8.0|7.1|6.2|5.5|4.7|4.3|4.0|3.6|3.0|
|MF-LR550/20|8.0|7.1|6.2|5.5|4.7|4.3|4.0|3.6|3.0|
|MF-LR600|8.7|7.8|7.1|6.0|5.2|4.7|4.4|3.9|3.3|
|MF-LR730|10.5|9.5|8.6|7.3|7.4|6.8|6.2|5.5|4.5|
|MF-LR730/20|10.5|9.5|8.6|7.3|7.4|6.8|6.2|5.5|4.5|
|MF-LR900/20|12.7|11.4|10.0|9.0|7.5|6.8|6.2|5.5|4.5|



Itrip is approximately two times Ihold. 

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

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A B C D F<br>Model<br>Min. Max. Min. Max. Min. Max. Min. Max. Min. Max.<br>19.9 22.1 4.9 5.2 0.6 1.0 5.5 7.5 3.9 4.1<br>MF-LR190<br>(0.783) (0.870) (0.193) (0.205) (0.024) (0.039) (0.217) (0.295) (0.154) (0.161)<br>20.9 23.1 4.9 5.2 0.6 1.0 4.1 5.5 3.9 4.1<br>MF-LR260<br>(0.823) (0.909) (0.193) (0.205) (0.024) (0.039) (0.161) (0.217) (0.154) (0.161)<br>24.0 26.0 6.9 7.5 0.6 1.0 4.1 5.5 4.9 5.1<br>MF-LR380<br>(0.945) (1.024) (0.272) (0.295) (0.024) (0.039) (0.161) (0.217) (0.193) (0.201)<br>24.0 26.0 9.9 10.5 0.6 1.0 5.3 6.7 5.9 6.1<br>MF-LR450<br>(0.945) (1.024) (0.390) (0.414) (0.024) (0.039) (0.209) (0.264) (0.232) (0.240)<br>35.0 37.0 6.9 7.5 0.6 1.0 5.3 6.7 4.9 5.1<br>MF-LR550<br>(1.378) (1.457) (0.272) (0.295) (0.024) (0.039) (0.209) (0.264) (0.193) (0.201)<br>35.0 37.0 6.9 7.5 0.6 1.0 5.3 6.7 4.9 5.1<br>MF-LR550/20<br>(1.378) (1.457) (0.272) (0.295) (0.024) (0.039) (0.209) (0.264) (0.193) (0.201)<br>24.0 26.0 14.8 15.9 0.6 1.0 4.1 5.5 5.9 6.1<br>MF-LR600<br>(0.945) (1.024) (0.583) (0.626) (0.024) (0.039) (0.161) (0.217) (0.232) (0.240)<br>28.0 30.0 14.0 15.0 0.6 1.0 4.8 5.7 5.9 6.1<br>MF-LR730<br>(1.102) (1.181) (0.551) (0.590) (0.024) (0.039) (0.189) (0.224) (0.232) (0.240)<br>27.1 29.1 13.9 14.5 0.6 1.0 4.1 5.5 5.9 6.1<br>MF-LR730/20<br>(1.067) (1.146) (0.547) (0.571) (0.024) (0.039) (0.161) (0.217) (0.232) (0.240)<br>45.4 47.6 7.9 8.5 0.6 1.3 4.6 9.2 5.9 6.1<br>MF-LR900/20<br>(1.787) (1.874) (0.311) (0.335) (0.024) (0.051) (0.181) (0.362) (0.232) (0.240)<br>MM<br>DIMENSIONS:<br>A (INCHES)<br>B F<br>D D<br>C<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-LR Series - PTC Resettable Fuses** 

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

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100<br>10<br>1<br>.01<br>1 10 100<br>Fault Current  (Amps)<br>MF-LR550/20<br>MF-LR550<br>MF-LR450 MF-LR600<br>MF-LR380 MF-LR730 & MF-LR730/20<br>MF-LR260<br>MF-LR900/20<br>MF-LR190<br>(Seconds)<br>Time to Trip<br>**----- End of picture text -----**<br>


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

Packaging:   Bulk - 500 pcs. per bag 

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

Represents total content. Layout may vary. 

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MANUFACTURER'S<br>TRADEMARK PART<br>IDENTIFICATION<br>LR190<br>8144S<br>DATE CODE LOT NO.<br>(FIRST DIGIT = (S = CHINA)<br>LAST DIGIT OF YEAR;<br>NEXT THREE DIGITS =<br>DAY OF YEAR)<br>**----- End of picture text -----**<br>


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

**MF - LR  730/20 - 0** 

- Multifuse[®] Product Designator Series LR = Axial Leaded “Strap” Component 

- Hold Current, Ihold/Vmax* 190-900 (1.90 Amps - 9.00 Amps) 

- Packaging Options -__ = Bulk Packaging Designator for Models MF-LR190 through MF-LR730 

- -0 = Bulk Packaging Designator for Models MF-LR550/20, MF-LR730/20 and MF-LR900/20 

*Vmax entry applies only to Models MF-LR550/20, MF-LR730/20 & MF-LR900/20. 

**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** 

## MF-LR SERIES, REV. Y, 01/22 

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 its affiliates (collectively, “Bourns”). 

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_Web Page: http://www.bourns.com/legal/disclaimers-terms-and-policies_ 

_PDF: http://www.bourns.com/docs/Legal/disclaimer.pdf_ 

C1753 05/17/18R