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Product Detailed Parameters
- Description：PTC 6V POLYFUSE SMT 0402 SL 0.75
- Series：POLY-FUSE®, LoRho
- Mfr：Littelfuse Inc.
- Package：Tape & Reel (TR),Cut Tape (CT)
- Type：Polymeric
- Voltage - Max：6V
- Current - Hold (Ih) (Max)：750 mA
- Current - Trip (It)：1.5 A
- Current - Max：40 A
- Time to Trip：100 ms
- Resistance - Initial (Ri) (Min)：30 mOhms
- Resistance - Post Trip (R1) (Max)：300 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 0402L075SLKR is a PolySwitch resettable PPTC device in the Low Rho series, designed for surface-mount PCB applications. It features a maximum voltage rating of 6 VDC and a hold current of 750 mA at 23°C. The trip current is specified at 1.5 A, with a maximum fault current rating of 40 A. Initial resistance is 300 mOhms max. The component operates within a temperature range of -40°C to +85°C and utilizes an SMD/SMT end type.
Feature Summary
- Provides reliable overcurrent protection by increasing resistance as internal heat limits current flow during fault conditions.
- Offers automatic circuit restoration after cooling, eliminating the need for manual fuse replacement.
- Utilizes low-resistance polymer construction to minimize power loss and voltage drop in sensitive circuits.
Applications
- Protection of portable electronic devices and handheld electronics
- Overcurrent safeguarding for battery-powered equipment
- Circuit protection in LED lighting systems
- Defense against short circuits in AC-DC power adapters
Procurement Notes
Verify that the specific suffix SLKR matches the required reel or cut tape packaging configuration for your assembly line. Confirm RoHS compliance status through official Littelfuse documentation prior to integration. Ensure storage conditions maintain component integrity before soldering processes begin.
Selection Notes
Select this part when a compact 0402 footprint is required alongside a 750 mA hold current specification. The low initial resistance value supports efficient power delivery in low-voltage environments. Evaluate thermal derating curves to ensure the hold current remains sufficient under elevated ambient operating temperatures.
Part Context
This component belongs to the PolySwitch Low Rho family of resettable fuses from Littelfuse. The series is engineered for high-density surface-mount layouts where space constraints limit the use of traditional axial or radial fuses. It serves as a solid-state alternative to single-use fusible links in modern consumer and industrial electronics.
Replacement Considerations
Cross-reference with other 0402L series variants such as 0402L035SLKR or 0402L100SLKR if different current ratings are needed. Verify that substitute parts maintain identical voltage ratings and package dimensions to ensure mechanical compatibility.
