P-TCO-U450/12-2

## **Applications** 

## **Features** 

|***RoHS COMPLIANT**<br>**&**<br>****HALOGEN FREE**|**Features**<br>nCompact, space-saving 1210 footprint<br>nLow profile and symmetrical design<br>nSmall size promotes fast response time<br>to thermal runaway events<br>**Applications**<br>nThermal protection for USB-C 2.0, 3.0<br>and 3.1 cables and ports<br>nMobile device fast charging port protection|
|---|---|
||nUltra-low resistance|
||nRoHS compliant*<br>nAgency recognition:|
|BOURNS|**P-TCO-U Series - Polymeric Thermal Cutoff Device**|
|~~**Electrical Characteristics**~~||
|**Model**<br>**Vmax**<br>**Imax**<br>**Ihold**<br>**Thermal Cutoff**<br>**Max. Time To Trip**<br>**Resistance**<br>**Certifications**<br>**at 23 °C**<br>**at 3 A**<br>**at 2 A**<br>**at 23 °C**<br>**Ohms at 23 °C**<br>**cUL**<br>**TÜV**<br>**Volts**<br>**Amps**<br>**Amps**<br>**°C**<br>**°C**<br>**Amps**<br>**Seconds**<br>**RMin.**<br>**R1Max.**<br>E174545<br>R50405491<br>P-TCO-U350/12<br>12<br>50<br>3.5<br>75 ±20<br>90 ±20<br>17.0<br>5.0<br>0.002<br>0.022<br>3<br>3<br>P-TCO-U400/12<br>12<br>50<br>4.0<br>80 ±15<br>95 ±15<br>20.0<br>5.0<br>0.002<br>0.018<br>3<br>3<br>P-TCO-U450/12<br>12<br>50<br>4.5<br>85 ±15<br>100 ±10<br>22.5<br>2.0<br>0.002<br>0.014<br>3<br>3<br>~~rs e~~~~**s** ee~~<br>~~es~~<br>~~ee rs~~<br>~~es r~~<br>~~rr~~<br>~~rsGsfe~~<br>~~Po~~<br>~~Rs rs~~<br>~~rd~~<br>~~Qs QO~~<br>~~QO QO~~<br>~~PO~~||



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

Operating Temperature ......................................... -40 °C to +85 °C Storage Condition Before Opening ............................................... +40 °C max. / 70 % RH max. After Opening................................................... +40 °C max. / 10 % RH max. Floor Condition After Opening .............................. Consumption within 4 weeks at floor condition +30 °C max. / 60 % RH max. Passive Aging ....................................................... +85 °C, 1000 hours ............................................... ±10 % typical resistance change Humidity Aging...................................................... +85 °C, 85 % R.H. 100 hours ............................... ±15 % typical resistance change Thermal Shock ..................................................... +85 °C to -40 °C, 20 times .................................... ±30 % typical resistance change Solvent Resistance ............................................... MIL-STD-202, Method 215 ................................... No change (marking still legible) Vibration ............................................................... MIL-STD-883C, Method 2007.1, ........................... No change (Rmin<R<R1max) Condition A Moisture Sensitivity Level (MSL) .......................... See Note ESD Classification - HBM ..................................... 6 

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

|**Test**<br>**Test Conditions**<br>**Accept/Reject Criteria**|
|---|
|Visual/Mech. ......................................................... Verify dimensions and materials ........................... Per MF physical description|
|Resistance ............................................................ In still air @ 23 °C ................................................. Rmin ≤R≤R1max<br>Time to Trip ........................................................... At specified current, Vmax, 23 °C ......................... T≤max. time to trip (seconds)<br>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|
|Solderability .......................................................... 245 °C ±5 °C, 5 seconds ...................................... 95 % min. coverage|



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

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

> * 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. 

## **MF-NSMF Series - PTC Resettable FusesP-TCO-U Series - Polymeric Thermal Cutoff Device** 

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

|**Model**|**Model**|**Model**||**A**|**A**|**A**|**A**||||**B**|**B**|||**C**|**C**|||||**D**|**D**|**D**|||**E**|**E**|
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|||||Min.||||Max.|||Min.||Max.||Min.||Max.||||Min.|||||Min.|Max.|
|P-TCO-U350/12||||3.00<br>(0.118)||||3.43<br>(0.135)|||2.35<br>(0.093)||2.80<br>(0.110)||0.60<br>(0.024)||1.10<br>(0.043)||||0.25<br>(0.010)|||||0.05<br>(0.002)|0.45<br>(0.018)|
|P-TCO-U400/12||||||||||||||||||||||||||||
|P-TCO-U450/12||||||||||||||||||||||||||||
|**_Top View_**<br>DIMENSIONS:|MM|||C<br>**_ide View_**||||**_Bottom View_**<br><br>|||**Terminal material:**<br>ENIG-plated terminals|||||||1.0 ±|**_Re_**<br>0.05|||||||**_Layout_**<br>2.5 ± 0.1<br>(.098  ± .004)<br>1.0 ± 0.05<br>(.039 ± .002)||
|A||B<br>||||||D<br>E||||||||||||||||||||
|||||||||||||||||||(.039 ±|2.0 ±<br>.002)|||||||||
|||||||||||||||||||||||||||||
|||||||||||||||||||||||||||||
|||||||||||||||||||||||||||||
|||||||||||||||||||||||||||||



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

3500 pcs. per reel 

## ~~**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**|
|---|---|---|---|---|---|---|---|---|---|
||**-40 °C**|**-20 °C**|**0 °C**|**23 °C**|**40 °C**|**50 °C**|**60 °C**|**70 °C**|**85 °C**|
|P-TCO-U350/12|5.10|4.65|4.13|3.50|2.98|2.65|2.50|2.00|1.75|
|P-TCO-U400/12|5.80|5.25|4.70|4.00|3.40|3.10|2.80|2.28|2.00|
|P-TCO-U450/12|6.30|5.65|4.95|4.50|3.83|3.40|2.95|2.50|2.05|



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

## **P-TCO - U 450 / 12 - 2** 

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

Represents total content. Layout may vary. 

Polymeric PART IDENTIFICATION: Thermal Cutoff P-TCO-U350/12 = S12 Device P-TCO-U400/12 = U12 P-TCO-U450/12 = X12 U = 1210 footprint Surface Mount Component **X12** MANUFACTURING DATE CODE IS Hold Current, Ihold LOCATED ON PACKING LABEL. 350 - 450 (3.50 Amps - 4.50 Amps) Maximum Voltage, Vmax 12 = 12 Volts Packaging -2 =  Tape and Reel Packaged per EIA 481 

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 PotentiometerP-TCO-U Series - Polymeric Thermal Cutoff Device** 

## ~~**Solder Refow Recommendations**~~ 

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tp<br>TP CRITICAL ZONE<br>RAMP-UP TL TO TP<br>TL<br>t L<br>Ts max<br>RAMP-DOWN<br>Ts min<br>ts<br>PREHEAT<br>25<br>t  25 °C TO PEAK<br>Temperature<br>**----- End of picture text -----**<br>


## **Notes:** 

- P-TCO-U models cannot be wave soldered or hand soldered. Please contact Bourns for soldering recommendations. 

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

- If reflow temperatures exceed the recommended profile, devices may not meet the published specifications. 

- Compatible with Pb and Pb-free solder reflow profiles. 

- Excess solder may cause a short circuit, especially during hand soldering. Please refer to the Polymeric Thermal Cutoff Soldering Recommendation guidelines. 

**Time** 

**==> picture [506 x 389] intentionally omitted <==**

**----- Start of picture text -----**<br>
Profile Feature Pb-Free Assembly<br>Average Ramp-Up Rate (Tsmax to Tp) 3 °C / second max.<br>PREHEAT:<br>     Temperature Min. (Tsmin)  150 °C<br>     Temperature Max. (Tsmax)  200 °C<br>     Time (Tsmin to Tsmax) (ts) 60~180 seconds<br>TIME MAINTAINED ABOVE:<br>     Temperature (TL)  217 °C<br>     Time (tL) 60~150 seconds<br>Peak Temperature (Tp) 260 °C<br>Time within 5 °C of Actual Peak Temperature (tp) 20~40 seconds<br>Ramp-Down Rate 6 °C / second max.<br>Time 25 °C to Peak Temperature 8 minutes max.<br>Packaging Specifcations<br>P-TCO-U Series per EIA 481<br>0.6 1.50 +0.1 / -0 4.0 ± 0.10 2.0 ± 0.05 1.75 ± 0.10 185 15.4*<br>(.024)  [MAX.] (.059 +.004 / -0) [DIA.] (.157 ± .004) (.079 ± .002) (.069 ± .004) (7.283) MAX. (.606) MAX.<br>5.50 ± 0.05<br>12.0 ± 0.30 (.216 ± .002)<br>(.472 ± .012)<br>4.5<br>(.177)  [MAX.] COVERTAPE 50 MIN.<br>3.50 ± 0.10 (1.97) HUB DIA.<br>(.138 ± .004)<br>1.10 ± 0.10<br>(.043 ± .004) 0.1 4.0 ± 0.10 2.90 ± 0.10 10.25 12.4 +1 / -0*<br>TYP.<br>(.004)  [MAX.] (.157 ± .004) (.114 ± .004) (.404) (.488 +.039 / -0)<br>*MEASURED AT HUB<br>LEADER MIN. TRAILER MIN.<br>390 160<br>(15.35) (6.30) MM<br>DIMENSIONS:<br>P-TCO-U SERIES, REV. A, 02/19 (INCHES)<br>**----- End of picture text -----**<br>


P-TCO-U SERIES, REV. A, 02/19 

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-NSMF Series - PTC Resettable FusesBourns[®] Polymeric Thermal Cutoff Devices (P-TCO)** 

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

Users are responsible for independent and adequate evaluation of Bourns[®] Polymeric Thermal Cutoff (P-TCO) devices in the user’s application, including the P-TCO device characteristics stated in the applicable data sheet. 

- Polymeric Thermal Cutoff devices must not be allowed to operate beyond their stated maximum ratings. Inadequate adherence to such maximum ratings could result in damage to the P-TCO device and lead to electrical arcing and/or fire. Circuits with inductance may generate a voltage above the rated voltage of the P-TCO devices and should be thoroughly evaluated within the user’s application during the P-TCO selection and qualification process. 

- Polymeric Thermal Cutoff devices are intended to protect against adverse effects of temporary overtemperature conditions and are not intended to serve as protective devices where such conditions are expected to be repetitive or prolonged. 

- As a normal function of operation, Polymeric Thermal Cutoff devices experience thermal expansion under fault conditions. Thus, a P-TCO 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, and may result in the malfunction of P-TCO 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 Polymeric Thermal Cutoff devices. 

- Aggressive solvents may adversely affect the performance of Polymeric Thermal Cutoff 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 P-TCO devices. Such aggressive solvents must be thoroughly cured or baked to ensure complete removal from P-TCO devices 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 Polymeric Thermal Cutoff Device Moisture/Reflow Sensitivity Classification (MSL) note: https://www.bourns.com/ docs/RoHS-MSL/msl_ptco.pdf 

**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. 

® 

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® 

Bourns[®] 

® standard products that are suitable for use in aircraft “Applications.” Unless expressly and specifically ® standard 

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