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LR4-190F is listed in the Ptc Resettable Fuses range at ChipApex. The manufacturer field lists Littelfuse Inc.. Its product description is PTC RESET FUSE 15V 1.9A STRAP. Review the specifications below when checking this part for your BOM.
Ptc Resettable Fuses specifications for LR4-190F
- Description：PTC RESET FUSE 15V 1.9A STRAP
- Series：PolySwitch®, LR4
- Mfr：Littelfuse Inc.
- Package：Bag
- Type：Polymeric
- Voltage - Max：15V
- Current - Hold (Ih) (Max)：1.9 A
- Current - Trip (It)：3.9 A
- Current - Max：100 A
- Time to Trip：5 s
- Resistance - Initial (Ri) (Min)：39 mOhms
- Resistance - Post Trip (R1) (Max)：102 mOhms
- Resistance - 25°C (Typ)：-
- Operating Temperature：-40°C ~ 85°C
- Grade：-
- Qualification：-
- Ratings：-
- Mounting Type：User Defined
- Package / Case：Strap
- Size / Dimension：0.827" L x 0.205" W (21.00mm x 5.20mm)
- Height - Seated (Max)：-
- Thickness (Max)：-
- Lead Spacing：-
Ptc Resettable Fuses datasheet and documents for LR4-190F
Ptc Resettable Fuses Overview
The Littelfuse LR4-190F is a PolySwitch resettable PPTC fuse with a 15V maximum voltage and 1.9A hold current. It features a 3.9A trip current, 100A maximum interrupt rating, and 72mΩ resistance. Operating temperature ranges from -40°C to +85°C. The device utilizes strap mount axial termination for secure PCB integration.
Ptc Resettable Fuses Feature Summary
- Polymeric positive temperature coefficient construction for automatic circuit protection
- Strap mount axial termination design for robust mechanical attachment
- Qualified to AEC-Q200 automotive reliability standards
Ptc Resettable Fuses Applications
- Automotive battery pack overcurrent protection
- Portable electronic device power circuits
- Consumer electronics battery management systems
Ptc Resettable Fuses Procurement Notes
Verify the specific suffix (SF vs F) against the manufacturer datasheet to confirm exact package dimensions and lead configuration. Confirm AEC-Q200 qualification status if automotive application is required. Check RoHS compliance documentation for environmental regulatory adherence before procurement.
Ptc Resettable Fuses Selection Notes
Select this component when a 1.9A continuous current capacity is required in a low-voltage 15V system. The strap mount style suits applications needing high mechanical stability. Ensure the ambient operating temperature does not exceed 85°C and that the 100A fault current rating matches the circuit's prospective short-circuit capability.
Ptc Resettable Fuses Part Context
This part belongs to the LR4 series of PolySwitch resettable fuses designed for battery applications. The series offers various current ratings from 1.9A to 13A and voltage ratings up to 20V. These devices provide reusable overcurrent protection as an alternative to traditional one-time fuses in portable and automotive electronics.
Ptc Resettable Fuses Replacement Considerations
LR4-190SF is a variant within the same series. Verify pin compatibility and electrical parameters before substitution. No other direct cross-model substitutes are confirmed in public documentation.
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