MF-RX018/250-2

## **Features** 

■ Radial leaded devices 

- Fast trip resettable PTCs 

- Binned and sorted narrow resistance ranges available 

## **Applications** 

■ Customer Premise Equipment (CPE) ■ Central Office / Telecom Centers (CO) 

- Access equipment 

■ RoHS compliant* 

■ Agency recognition: 

## **MF-RX/250 Series - Telecom PTC Resettable Fuses** 

**Electrical Characteristics** 

|**Model**<br>~~_~~<br>~~po~~|**Maximum**<br>**Operating**<br>**Voltage**<br>**(DC)**<br>~~a~~|**Maximum**<br>**Interrupt**<br>**Ratings**<br>~~ee~~|**Maximum**<br>**Interrupt**<br>**Ratings**<br>~~ee~~|**Ihold**<br>~~ee~~|**Itrip**<br>~~ee~~|**Initial**<br>**Resistance**<br>~~ss~~|**Initial**<br>**Resistance**<br>~~ss~~|**One Hour**<br>**(R1)**<br>**Post-Trip**<br>**Resistance**<br>~~Qe~~|**Maximum**<br>**Time to Trip**<br>~~Qe~~|**Maximum**<br>**Time to Trip**<br>~~Qe~~|**Tripped**<br>**Power**<br>**Dissipation**<br>~~Qe~~|**Agency**<br>**Recognition**<br>~~Qe~~|**Agency**<br>**Recognition**<br>~~Qe~~|
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|||**Vrms**<br>~~ee~~|**Amps**<br>~~ee~~|**at 23 °C**<br>~~ee~~||**at 23 °C**<br>**Ohms**<br>~~ss~~||**at 23 °C**<br>**Ohms**<br>~~Qe~~|**at 23 °C**<br>~~Qe~~||**at 23 °C**<br>**Ohms**<br>~~Qe~~|**cUL**<br>~~Qe~~|**TÜV**<br>~~Qe~~|
||**Volts**<br>~~a~~|**Max.**<br>~~ee~~|**Max.**<br>~~ee~~|**Amps**<br>~~ee~~||**Min.**<br>~~ss~~|**Max.**<br>~~ss~~|**Max.**<br>~~Qe~~|**Amps**<br>~~Qe~~|**Sec.**<br>~~Qe~~|**Max.**<br>~~Qe~~|E174545<br>~~Qe~~|R 50260658<br>~~Qe~~|
|MF-RX012/250<br>~~_~~<br>~~po~~<br>~~po~~|60<br>~~a ~~|250<br> ~~ee~~|3<br>~~ee~~|0.12<br>~~ee~~|0.24<br>~~ee ~~|4.0<br> ~~ss~~|8.0<br>~~ss~~|16.0<br>~~Qe~~|1.0<br>~~Qe~~|2.5<br>~~Qe~~|1.0<br>~~Qe~~|✓<br>~~Qe~~|✓<br>~~Qe~~|
|MF-RX012/250-A<br>~~po~~<br>~~po~~<br>~~po~~|60|250|3|0.12|0.24|7.0|9.0|16.0|1.0|2.5|1.0|✓|✓|
|MF-RX012/250-C<br>~~po~~<br>~~po~~<br>~~Re~~|60<br>~~Ge~~|250|3<br>~~GGG~~|0.12<br>~~GGG~~|0.24<br>~~GGG~~|5.5<br>~~GGG~~|7.5<br>~~GG~~|14.0<br>~~GG~~|1.0<br>~~GO~~|2.5<br>~~GO~~|1.0<br>~~GG~~|✓<br>~~GG~~|✓|
|MF-RX012/250-F<br>~~po~~<br>~~Re~~<br>~~po~~|60<br>~~Ge~~|250|3<br>~~GGG~~|0.12<br>~~GGG~~|0.24<br>~~GGG~~|6.0<br>~~GGG~~|10.5<br>~~GG~~|16.0<br>~~GG~~|1.0<br>~~GO~~|2.5<br>~~GO~~|1.0<br>~~GG~~|✓<br>~~GG~~|✓|
|MF-RX012/250-G<br>~~Re~~<br>~~po~~<br>~~po~~|60<br>~~Ge~~|250|3<br>~~GGG~~|0.12<br>~~GGG~~|0.24<br>~~GGG~~|5.5<br>~~GGG ~~|6.5<br> ~~GG~~|16.0<br>~~GG~~|1.0<br>~~GO~~|2.5<br>~~GO ~~|1.0<br> ~~GG~~|✓<br>~~GG~~|✓|
|MF-RX012/250-H<br>~~po~~<br>~~po~~<br>~~po~~|60|250|3|0.12|0.24|9.0|10.5|16.0|1.0|2.5|1.0|✓|✓|
|MF-RX012/250-T<br>~~po~~<br>~~po~~<br>~~po~~|60|250|3|0.12|0.24|7.0|12.0|16.0|1.0|2.5|1.0|✓|✓|
|MF-RX012/250-1<br>~~po~~<br>~~po~~<br>~~po~~|60|250|3|0.12|0.24|6.0|9.0|16.0|1.0|2.5|1.0|✓|✓|
|MF-RX012/250-2<br>~~po~~<br>~~po~~<br>~~po~~|60|250|3|0.12|0.24|8.0|10.5|16.0|1.0|2.5|1.0|✓|✓|
|MF-RX012/250U<br>~~po~~<br>~~po~~<br>~~po~~|60|250|3|0.12|0.24|6.0|10.0|16.0|1.0|2.5|1.0|✓|✓|
|MF-RX014/250<br>~~po~~<br>~~po~~<br>~~po~~|60|250|3|0.145|0.28|3.0|6.0|14.0|1.0|5.0|1.0|✓|✓|
|MF-RX014/250-A<br>~~po~~<br>~~po~~<br>~~po~~|60|250|3|0.145|0.28|3.0|5.5|12.0|1.0|5.0|1.0|✓|✓|
|MF-RX014/250-B<br>~~po~~<br>~~po~~<br>~~po~~|60|250|3|0.145|0.28|4.5|6.0|14.0|1.0|5.0|1.0|✓|✓|
|MF-RX014/250-C<br>~~po~~<br>~~po~~<br>~~po~~|60|250|3|0.145|0.28|3.0|4.0|14.0|1.0|5.0|1.0|✓|✓|
|MF-RX014/250-T<br>~~po~~<br>~~po~~<br>~~po~~|60|250|3|0.145|0.28|5.4|7.5|14.0|1.0|5.0|1.0|✓|✓|
|MF-RX014/250U<br>~~po~~<br>~~po~~<br>~~po~~|60|250|3|0.145|0.28|3.5|6.5|12.0|1.0|4.0|1.0|✓|✓|
|MF-RX018/250<br>~~po~~<br>~~po~~<br>~~po~~|60|250|10|0.18|0.50|0.8|2.0|4.0|1.0|20|1.0|✓|✓|
|MF-RX018/250U<br>~~po~~<br>~~po~~|60|250|10|0.18|0.50|0.8|2.0|4.0|1.0|20|1.0|✓|✓|



- “U” suffix indicates product without insulation coating. 

## **Environmental Characteristics** 

|**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|±15 % typical resistance<br>change|
|Humidity Aging|+85 °C, 85 % R.H. 1000 hours|±15 % typical resistance<br>change|
|Thermal Shock|-55 °C to +125 °C, 10 times|±15 % typical resistance<br>change|
|Solvent Resistance|MIL-STD-202, Method 215|No change<br>(marking still legible)|
|Vibration|MIL-STD-883C, Method 2007.1<br>Condition A|±15 % typical resistance<br>change|
|Moisture Sensitivity Level<br>(MSL)|See Note||
|ESD Classification|Class 6 (per AEC-Q200-2, HBM)||



## **Additional Information** 

Click these links for more information: 

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


**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** 

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

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

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. 

■ Ability to withstand AC power cross conditions 

## **Additional Features** 

■ Assists equipment with meeting ITU-T K.20/K.21/K.45 

■ Assists equipment with meeting Telcordia GR-1089-C Intrabuilding 

## **MF-RX/250 Series - Telecom PTC Resettable Fuses** 

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

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


|~~**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|



## ~~**Thermal Derating Chart - 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-RX012/250|0.186|0.165|0.143|0.120|0.099|0.088|0.077|0.066|0.050|
|MF-RX012/250-A|0.186|0.165|0.143|0.120|0.099|0.088|0.077|0.066|0.050|
|MF-RX012/250-C|0.186|0.165|0.143|0.120|0.099|0.088|0.077|0.066|0.050|
|MF-RX012/250-F|0.186|0.165|0.143|0.120|0.099|0.088|0.077|0.066|0.050|
|MF-RX012/250-G|0.186|0.165|0.143|0.120|0.099|0.088|0.077|0.066|0.050|
|MF-RX012/250-H|0.186|0.165|0.143|0.120|0.099|0.088|0.077|0.066|0.050|
|MF-RX012/250-T|0.186|0.165|0.143|0.120|0.099|0.088|0.077|0.066|0.050|
|MF-RX012/250-1|0.186|0.165|0.143|0.120|0.099|0.088|0.077|0.066|0.050|
|MF-RX012/250-2|0.186|0.165|0.143|0.120|0.099|0.088|0.077|0.066|0.050|
|MF-RX012/250U|0.186|0.165|0.143|0.120|0.099|0.088|0.077|0.066|0.050|
|MF-RX014/250|0.225|0.199|0.172|0.145|0.119|0.106|0.093|0.080|0.060|
|MF-RX014/250-A|0.225|0.199|0.172|0.145|0.119|0.106|0.093|0.080|0.060|
|MF-RX014/250-B|0.225|0.199|0.172|0.145|0.119|0.106|0.093|0.080|0.060|
|MF-RX014/250-C|0.225|0.199|0.172|0.145|0.119|0.106|0.093|0.080|0.060|
|MF-RX014/250-T|0.225|0.199|0.172|0.145|0.119|0.106|0.093|0.080|0.060|
|MF-RX014/250U|0.225|0.199|0.172|0.145|0.119|0.106|0.093|0.080|0.060|
|MF-RX018/250|0.269|0.240|0.211|0.180|0.153|0.138|0.123|0.109|0.087|
|MF-RX018/250U|0.269|0.240|0.211|0.180|0.153|0.138|0.123|0.109|0.087|



Itrip is approximately two times Ihold. 

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-RX/250 Series - Telecom PTC Resettable Fuses** 

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

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A B C D E Physical Characteristics<br>Model<br>Max. Max. Nom. Min. Max. Lead Dia. Style Material<br>**----- End of picture text -----**<br>


|**Model**|**A**|**B**|**B**|**C**|**C**|**D**|**D**|**E**|**E**|**Physical Characteristics**|**Physical Characteristics**|**Physical Characteristics**|**Physical Characteristics**|
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
||**Max.**|**Max.**||**Nom.**||**Min.**||**Max.**||**Lead Dia.**||**Style**|**Material**|
|||||||||||||||
|MF-RX012/250|6.5<br>(0.256)||11.0<br>(0.433)||5.1 ± 0.7<br>(0.201 ± 0.028)||4.7<br>(0.185)||4.6<br>(0.181)||0.65<br>(0.026)|1|Sn/Cu|
|MF-RX012/250-A||||||||||||||
|MF-RX012/250-C||||||||||||||
|MF-RX012/250-F||||||||||||||
|MF-RX012/250-G||||||||||||||
|MF-RX012/250-H||||||||||||||
|MF-RX012/250-T||||||||||||||
|MF-RX012/250-1||||||||||||||
|MF-RX012/250-2||||||||||||||
|MF-RX012/250U|6.0<br>(0.236)||10.0<br>(0.394)||5.1 ± 0.7<br>(0.201± 0.028)||4.7<br>(0.185)||3.8<br>(0.150)||0.65<br>(0.026)|2|Sn/Cu|
|MF-RX014/250|6.5<br>(0.256)||11.0<br>(0.433)||5.1 ± 0.7<br>(0.201 ± 0.028)||4.7<br>(0.185)||4.6<br>(0.181)||0.65<br>(0.026)|1|Sn/Cu|
|MF-RX014/250-A||||||||||||||
|MF-RX014/250-B||||||||||||||
|MF-RX014/250-C||||||||||||||
|MF-RX014/250-T||||||||||||||
|MF-RX014/250U|6.0<br>(0.236)||10.0<br>(0.394)||5.1 ± 0.7<br>(0.201± 0.028)||4.7<br>(0.185)||3.8<br>(0.150)||0.65<br>(0.026)|2|Sn/Cu|
|MF-RX018/250|11.0<br>(0.433)||13.6<br>(0.535)||5.1 ± 0.7<br>(0.201± 0.028)||4.7<br>(0.185)||4.6<br>(0.181)||0.65<br>(0.026)|1|Sn/Cu|
|MF-RX018/250U|10.4<br>(0.409)||12.6<br>(0.496)||5.1 ± 0.7<br>(0.201 ± 0.028)||4.7<br>(0.185)||3.8<br>(0.150)||0.65<br>(0.026)|2|Sn/Cu|



MM DIMENSIONS: (INCHES) 

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Style 1  Style 2<br>Typical Part Marking<br>A E A E Represents total content. Layout may vary.<br>MANUFACTURER'S<br>TRADEMARK PART<br>B B RX012 IDENTIFICATION<br>0 220 S<br>YEAR CODE<br>LOCATION CODE:<br>DATE CODE S = CHINA<br>D<br>C<br>D C<br>**----- End of picture text -----**<br>


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

||||||
|---|---|---|---|---|
|**Packaging**<br>**Options**|**Models**|**Unit Quantity**<br>**(Pcs.)**|**Unit**|**Notes**|
|Bulk|All models|500|Bag||
|Tape & Reel|All models|1500|Reel|Available Binned|



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-RX/250 Series - Telecom PTC Resettable Fuses** 

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

**MF - RX  012/250 U - A 05 - 2** 

Multifuse[®] Product Designator Series RX = Radial Leaded Component 

Hold Current, Ihold 012-018 (0.12-0.18 Amps) Max. Interrupt Voltage, V 250 (250 Volts) Insulation Options Blank = Coated U = Uncoated Resistance Sorted Narrow resistance ranges - see Resistance Options chart 

Resistance Bins 05 = 0.5 ohm binned parts (coated only) Packaging Options - 0 = Bulk Packaging - 2 = Tape and Reel* 

*Packaged per EIA-468 

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

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**----- Start of picture text -----**<br>
100<br>10<br>1<br>MF-RX018/250 MODELS<br>MF-RX014/250 MODELS<br>0.10 MF-RX012/250 MODELS<br>0.01<br>0 0.5 1.0 1.5 2.0 2.5 3.0<br>Fault Current (Amps)<br>Time to Trip (Seconds)<br>**----- End of picture text -----**<br>


## ~~**Resistance Options**~~ 

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**----- Start of picture text -----**<br>
Initial Resistance<br>Values R1max<br>Model Bin<br>Ohms @ 23 ° C Ohms @ 23 ° C<br>Min. Max. Max.<br>**----- End of picture text -----**<br>


|**Model**|**Initial Resistance**<br>**Values**|**Initial Resistance**<br>**Values**|**R1max**|**Bin**|
|---|---|---|---|---|
||**Ohms@ 23 ° C**||**Ohms@ 23 ° C**||
||**Min.**|**Max.**|**Max.**||
||||||
|MF-RX012/250|4.0|8.0|16.0|N/A|
|MF-RX012/250-A05|7.0|9.0|16.0|0.5|
|MF-RX012/250-C05|5.5|7.5|14.0|0.5|
|MF-RX012/250-F05|6.0|10.5|16.0|0.5|
|MF-RX012/250-G05|5.5|6.5|16.0|N/A|
|MF-RX012/250-H05|9.0|10.5|16.0|N/A|
|MF-RX012/250-T05|7.0|12.0|16.0|0.5|
|MF-RX012/250-105|6.0|9.0|16.0|0.5|
|MF-RX012/250-205|8.0|10.5|16.0|0.5|
|MF-RX012/250U|6.0|10.0|16.0|N/A|
|MF-RX014/250|3.0|6.0|14.0|N/A|
|MF-RX014/250-A05|3.0|5.5|12.0|0.5|
|MF-RX014/250-B05|4.5|6.0|14.0|0.5|
|MF-RX014/250-C05|3.0|4.0|14.0|N/A|
|MF-RX014/250-T05|5.4|7.5|14.0|0.5|
|MF-RX014/250U|3.5|6.5|12.0|N/A|
|MF-RX018/250|0.8|2.0|4.0|N/A|
|MF-RX018/250U|0.8|2.0|4.0|N/A|



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-RX/250 Series Tape and Reel Specifications** 

Devices taped using EIA-468/IEC 60286-2 standards. See table below and figures for details. 

|**IEC**<br>**EIA**<br> <br>**Dimension Description**<br>**Mark**<br>**Mark**|**Dimensions**<br>**Dimensions**<br>**Tolerance**|**Dimensions**<br>**Dimensions**<br>**Tolerance**|**Dimensions**<br>**Dimensions**<br>**Tolerance**|**Dimensions**<br>**Dimensions**<br>**Tolerance**|**Dimensions**<br>**Dimensions**<br>**Tolerance**|**Dimensions**<br>**Dimensions**<br>**Tolerance**|
|---|---|---|---|---|---|---|
|Carrier tape width<br>_W_<br>_W_||18<br>(0.709)||-0.5/+1.0<br>(-0.02/+0.039)|||
|Hold down tape width<br>_W0_<br>_W0_||5<br>(0.197)||min.|||
|Hold down tape<br>|No|protrusion|||||
|Adhesive tape position<br>_W2_<br>_W2_||3<br>(0.118)||max.|||
|Sprocket hole position<br>_W1_<br>_W1_||9<br>(0.354)||-0.5/+0.75<br>(-0.02/+0.03)|||
|Sprocket hole diameter<br>_D0_<br>_D0_||4<br>(0.157)||(|±0.2<br>±0.0078)||
|Height to seating plane (straight lead)<br>_H_<br>_H_<br>18 ~ 20<br>(0.709 ~ 0.787)|||||||
|Height to seating plane (formed lead)<br>_H0_<br>_H0_||16<br>(0.63)|||±0.5<br>(±.02)||
|Overall height above abscissa<br>_H1_<br>_H1_||38.5<br>(1.516)|||max.||
|Cutout Length<br>_L_||11<br>(0.433)|||max.||
|Sprocket hole pitch<br>_P0_<br>_P0_||12.7<br>(0.5)|||±0.3<br>(±0.012||
|Device pitch<br>_P_<br>_P_||12.7<br>(0.5)|||±0.3<br>(±0.012)||
|<br>Pitch tolerance<br>20||consecutive|||±1<br>(±0.039)||
|Composite tape thickness<br>_t_<br>_t_||0.9<br>(0.035)|||max.||
|Overall tape and lead thickness<br>_t1_<br>_t1_||1.5<br>(0.059)|||max.||
|<br>Splice sprocket hole alignment||0|||±0.3<br>(±0.012)||
|Front-to-back deviation<br>Δ_h_<br>Δ_h_||0|||±1.0<br>(±0.039)||
|Side-to-side deviation<br>Δ_p_<br>Δ_p_||0|||±1.3<br>(±0.051)||
|Ordinate to adjacent component lead<br>_P1_<br>_P1_||3.81<br>(0.150)|||±0.7<br>(±0.028)||
|Lead spacing<br>_F_<br>_F_||5.08<br>(0.2)|||||
|Reel width including flanges and hub<br>_W4_<br>_w2_||62.0<br>(2.44)|max.||||
|Dimension between flanges (measured at hub)<br>_W3_<br>_w1_<br>allow proper reeling and unreeling|||||||
|Reel diameter<br>_A_<br>_a_||370.0<br>max.<br>(14.57)|||||
|_— Continued on next page —_||DIMENSIONS:||||MM<br>(INCHES)|



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-RX/250 Series Tape and Reel Specifications** 

|**IEC**<br>**EIA**<br> <br>**Dimension Description**<br>**Mark**<br>**Mark**|**Dimensions**<br>**Dimensions**<br>**Tolerance**|**Dimensions**<br>**Dimensions**<br>**Tolerance**|**Dimensions**<br>**Dimensions**<br>**Tolerance**|
|---|---|---|---|
|Space between flanges (at hub, excluding device)||4.75<br>(0.187)|±3.25<br>(±0.128)|
|Arbor hole diameter<br> _C_<br>_c_||26.0<br>(1.024)|±12.0<br>(±0.472)|
|Core diameter<br> _N_<br>_n_||80<br>(3.15)|min.|
|Box dimensions|62<br>(2.44)|372<br>372<br> (14.6) (14.6)|max.|
|Consecutive missing places||3|max.|
|Empty places per reel|Less than 0.1 %|||



**==> picture [498 x 192] intentionally omitted <==**

**----- Start of picture text -----**<br>
Taped Component Dimensions -<br>per EIA Mark -<br>Figure 1 h h p p<br>Reference plane<br>H1  P1 F W2 H1<br>H<br>L A B W0 H0 W1<br>W<br>User direction of feed<br>P0 D0<br>t1 Cross section A - B t<br>**----- End of picture text -----**<br>


## **Reel Dimensions -  per EIA Mark - Figure 2** 

**==> picture [398 x 149] intentionally omitted <==**

**----- Start of picture text -----**<br>
Reel<br>Upper side<br>n<br>Tape<br>User<br>a direction<br>of<br>feed<br>c Lower side<br>w1<br>w2<br>MM<br>DIMENSIONS:<br>(INCHES)<br>**----- End of picture text -----**<br>


MF-RX/250, REV. O 10/20 

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**~~ 

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- 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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