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Product Detailed Parameters
- Description：PTC RESET FUSE 1.0A 6V 0402
- Series：POLY-FUSE®, LoRho
- Mfr：Littelfuse Inc.
- Package：Tape & Reel (TR),Cut Tape (CT)
- Type：Polymeric
- Voltage - Max：6V
- Current - Hold (Ih) (Max)：1:00 AM
- Current - Trip (It)：2:00 AM
- Current - Max：40 A
- Time to Trip：200 ms
- Resistance - Initial (Ri) (Min)：30 mOhms
- Resistance - Post Trip (R1) (Max)：250 mOhms
- Resistance - 25°C (Typ)：-
- Operating Temperature：-40°C ~ 85°C
- Grade：-
- Qualification：-
- Ratings：-
- Mounting Type：Surface Mount
- Package / Case：0402 (1005 Metric), Concave
- Size / Dimension：0.039" L x 0.020" W (1.00mm x 0.50mm)
- Height - Seated (Max)：-
- Thickness (Max)：0.024" (0.60mm)
- Lead Spacing：-
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Overview
The Littelfuse 0402L100SLKR is a polymer PTC self-resetting fuse from the LoRho series, designed for surface mount applications in the 0402 (1005 metric) recessed package. It features a maximum hold current of 1 A and a trip current of 2 A within 200 ms. The device supports a maximum voltage of 6 V and a maximum fault current of 40 A. Initial resistance is minimized at 30 mOhms, while post-trip resistance remains under 250 mOhms. Operating temperature ranges from -40°C to 85°C.
Feature Summary
- Provides automatic resettable overcurrent protection with ultra-low internal resistance.
- Offers a very thin profile and miniature size to save printed circuit board space.
- Ensures fast response to fault currents while maintaining high electrical performance.
- Compatible with standard reflow and wave soldering procedures.
Applications
- Overcurrent protection for portable electronic devices
- Circuit protection in telecommunications equipment
- Protection for battery-powered consumer electronics
Procurement Notes
Verify that the specific suffix 'SLKR' matches the required tape and reel configuration for automated assembly processes. Confirm that the recessed package style aligns with the designated footprint on the target PCB layout. Ensure compliance with RoHS and halogen-free requirements as specified by the manufacturer documentation prior to final procurement approval.
Selection Notes
Select this component when an extremely low profile and minimal board area are critical constraints. The LoRho technology allows for higher hold current ratings within smaller packages compared to standard PPTCs. Consider the 6 VDC rating and 1 A hold current to ensure adequate margin for the specific circuit's operational parameters and thermal environment.
Part Context
This part belongs to the POLY-FUSE LoRho series, which utilizes polymer positive temperature coefficient technology. It is manufactured by Littelfuse Inc., a provider of circuit protection solutions. The device serves as a solid-state alternative to traditional fuses, offering repeated protection cycles without replacement after fault conditions are cleared.
Replacement Considerations
Direct substitutes include other 0402L series variants with matching hold current ratings, such as 0402L075SLKR or 0402L150SLKR, provided the electrical specifications align with the circuit design requirements.
