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Product Detailed Parameters
- Description：PTC RESET FUSE 6V 500MA 0402
- Series：LoRho Surface Mount
- Mfr：Littelfuse Inc.
- Package：Tape & Reel (TR)
- Type：Polymeric
- Voltage - Max：6V
- Current - Hold (Ih) (Max)：500 mA
- Current - Trip (It)：1:00 AM
- Current - Max：50 A
- Time to Trip：100 ms
- Resistance - Initial (Ri) (Min)：40 mOhms
- Resistance - Post Trip (R1) (Max)：400 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 0402L050SLYR is a polymer PTC resettable fuse from the Low Rho Surface Mount series. It provides overcurrent protection with a maximum voltage rating of 6V and a hold current of 500 mA. The device features a trip current of 1 A and a maximum fault current rating of 50 A. Its initial resistance is typically 40 mOhms, rising to a maximum of 400 mOhms after tripping. Packaged in a compact 0402 (1005 metric) surface-mount case with dimensions of 1.00mm x 0.50mm x 0.60mm, it operates within a temperature range of -40°C to +85°C.
Feature Summary
- Ultra-low internal resistance for minimal voltage drop
- Automatic resettable overcurrent protection
- Miniature size saves board space
- Compatible with high-temperature soldering processes
Applications
- Portable electronic devices
- Battery packs
- USB ports and peripherals
- Telecommunications equipment
Procurement Notes
Verify component status before ordering as this part number is marked as obsolete and no longer manufactured. Confirm availability of direct substitutes such as the 0402L050SLKR. Ensure design files are updated to accommodate any physical or electrical differences in replacement components. Check RoHS compliance documentation for final assembly requirements.
Selection Notes
Select this component for applications requiring low-profile overcurrent protection in tight spaces. The Low Rho series offers higher hold currents in smaller footprints compared to standard PPTCs. Consider the 6V rating and 500mA hold current when designing circuit protection. Evaluate thermal management needs given the 500mW power dissipation rating.
Part Context
This device belongs to the Littelfuse PolySwitch Low Rho SMD family, designed for ultra-low resistance applications. The series provides reliable protection for sensitive electronics while maintaining high electrical performance. These solid-state fuses raise resistance upon heating to limit current flow effectively.
Replacement Considerations
The 0402L050SLKR is listed as a direct substitute for the obsolete 0402L050SLYR. Verify that the replacement meets all original electrical specifications and package dimensions.
