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Product Detailed Parameters
- Description：PTC RESET FUSE 30V 50MA 0805
- Series：POLY-FUSE®, 0805L
- Mfr：Littelfuse Inc.
- Package：Tape & Reel (TR),Cut Tape (CT)
- Type：Polymeric
- Voltage - Max：30V
- Current - Hold (Ih) (Max)：50 mA
- Current - Trip (It)：150 mA
- Current - Max：40 A
- Time to Trip：1.5 s
- Resistance - Initial (Ri) (Min)：3.6 Ohms
- Resistance - Post Trip (R1) (Max)：20 Ohms
- Resistance - 25°C (Typ)：-
- Operating Temperature：-40°C ~ 85°C
- Grade：-
- Qualification：-
- Ratings：-
- Mounting Type：Surface Mount
- Package / Case：0805 (2012 Metric), Concave
- Size / Dimension：0.083" L x 0.053" W (2.10mm x 1.35mm)
- Height - Seated (Max)：-
- Thickness (Max)：0.049" (1.25mm)
- Lead Spacing：-
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Overview
The Littelfuse 0805L005/30YR-A is a surface-mount polymeric positive temperature coefficient (PPTC) resettable fuse from the 0805L series. It features a hold current of 50 mA and a trip current of 150 mA, with a maximum voltage rating of 30 VDC. The device offers a fault current rating of 40 A and a typical trip time of 1.5 seconds. Resistance ranges from 3.6 Ω to 20 Ω, with power dissipation at 0.5 W. Operating temperatures span -40°C to 85°C.
Feature Summary
- Provides automatic circuit protection by increasing resistance during overcurrent conditions
- Enables reusable safety without requiring manual replacement after fault clearance
- Designed for compact surface-mount integration in space-constrained applications
Applications
- Portable electronic devices requiring overcurrent protection
- Battery-powered equipment circuits
- Communication ports and data lines
- Consumer electronics power inputs
Procurement Notes
Verify component authenticity through authorized Littelfuse distributors or certified suppliers. Confirm that the part number matches 0805L005/30YR-A exactly, including suffix designations. Request original manufacturer documentation to validate specifications against datasheet standards. Ensure storage conditions comply with moisture sensitivity levels to maintain performance integrity prior to assembly.
Selection Notes
Select this component when circuit protection requires a low-profile SMD solution with specific 30 VDC and 50 mA hold current parameters. Evaluate thermal management requirements within the -40°C to 85°C operating range. Compare trip characteristics against system fault tolerance limits. Ensure footprint compatibility with 0805 package constraints and verify impedance values do not interfere with signal integrity in sensitive applications.
Part Context
This PTC resettable fuse belongs to Littelfuse's 0805L series, designed for surface-mount technology. It serves as a reusable alternative to traditional fuses in low-voltage DC circuits. The component utilizes polymer technology to provide rapid response to overcurrent events while maintaining a small form factor suitable for modern PCB layouts.
Replacement Considerations
Compatible substitutes include 0805L005/30YR and 0805L005/30YR-A. Verify identical electrical ratings and physical dimensions before substitution. Cross-reference datasheets to ensure matching trip times and resistance values for equivalent circuit performance.
