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RHE450 is listed in the Ptc Resettable Fuses range at ChipApex. The manufacturer field lists Littelfuse Inc.. Its product description is PTC RESET FUSE 16V 4.5A RADIAL. Review the specifications below when checking this part for your BOM.
Ptc Resettable Fuses specifications for RHE450
- Description：PTC RESET FUSE 16V 4.5A RADIAL
- Series：PolySwitch®
- Mfr：Littelfuse Inc.
- Package：Bulk
- Type：Polymeric
- Voltage - Max：16V
- Current - Hold (Ih) (Max)：4.5 A
- Current - Trip (It)：7.8 A
- Current - Max：100 A
- Time to Trip：3 s
- Resistance - Initial (Ri) (Min)：22 mOhms
- Resistance - Post Trip (R1) (Max)：3.6 Ohms
- Operating Temperature：-
- Ratings：-
- Mounting Type：Through Hole
- Package / Case：Radial, Disc
- Size / Dimension：0.409" L x 0.118" W (10.40mm x 3.00mm)
- Height - Seated (Max)：0.614" (15.60mm)
- Thickness (Max)：-
- Lead Spacing：0.199" (5.05mm)
Ptc Resettable Fuses datasheet and documents for RHE450
Ptc Resettable Fuses Overview
The Littelfuse RHE450 is a radial-leaded PolySwitch resettable PPTC device designed for PCB mounting. It features a hold current of 4.5 A and a trip current of 7.8 A, with a maximum voltage rating of 16 VDC. The component has a maximum rated current of 100 A and an initial resistance of 54 mΩ. It operates within a temperature range of -40°C to +125°C and utilizes a 5.8 mm lead spacing.
Ptc Resettable Fuses Feature Summary
- Provides reliable overcurrent protection through automatic resistance increase upon heating
- Offers reusable circuit safeguarding without requiring manual replacement after fault events
- Designed for compact PCB integration using standard radial leaded termination
Ptc Resettable Fuses Applications
- Protection of automotive actuators and small motors
- Safeguarding telecommunication and networking equipment circuits
- Overcurrent protection for power supply components and wiring harnesses
Ptc Resettable Fuses Procurement Notes
Verify the exact part number against official Littelfuse documentation to ensure compatibility with specific design requirements. Confirm that the 16 VDC maximum voltage and 4.5 A hold current align with the target circuit parameters. Check for any specific agency approvals or RoHS compliance status required by the end application standards before finalizing procurement.
Ptc Resettable Fuses Selection Notes
Select this component when a reusable overcurrent protection solution is needed for low-voltage DC circuits. Ensure the operating environment stays within the specified -40°C to +125°C range. Consider the 54 mΩ resistance impact on circuit efficiency and verify that the 100 A maximum rated current exceeds potential fault currents in the application.
Ptc Resettable Fuses Part Context
The RHE450 belongs to the PolySwitch resettable PPTC family from Littelfuse. These devices utilize polymer technology to provide solid-state overcurrent protection. They are widely used in industrial and commercial applications where circuit accessibility for manual fuse replacement is limited or impractical.
Ptc Resettable Fuses Replacement Considerations
Consult official Littelfuse substitution guides for verified equivalent parts. Do not assume cross-compatibility based solely on electrical ratings. Verify package dimensions and lead spacing match the existing PCB footprint if replacing an existing component.
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