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Product Detailed Parameters
- Description：PTC RESET FUSE 6V 1.55A RADIAL
- Series：POLY-FUSE®, USBR
- Mfr：Littelfuse Inc.
- Package：Bulk
- Type：Polymeric
- Voltage - Max：6V
- Current - Hold (Ih) (Max)：1.55 A
- Current - Trip (It)：2.7 A
- Current - Max：40 A
- Time to Trip：2.2 s
- Resistance - Initial (Ri) (Min)：40 mOhms
- Resistance - Post Trip (R1) (Max)：100 mOhms
- Resistance - 25°C (Typ)：-
- Operating Temperature：-40°C ~ 85°C
- Grade：-
- Qualification：-
- Ratings：-
- Mounting Type：Through Hole
- Package / Case：Radial, Disc
- Size / Dimension：0.272" Dia x 0.118" T (6.90mm x 3.00mm)
- Height - Seated (Max)：0.449" (11.40mm)
- Thickness (Max)：-
- Lead Spacing：0.201" (5.10mm)
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Overview
The Littelfuse 06R155BU is a polymeric resettable fuse (PTC) designed for circuit protection. It features a hold current of 2.7 A and a maximum trip current of 40 A. The device exhibits a resistance of 100 mOhms with a lead spacing of 5.1 mm. It operates within a temperature range of -40°C to +85°C and achieves a time to trip of 2.2 seconds.
Feature Summary
- Polymeric resettable fuse technology for overcurrent protection
- Reversible tripping action upon fault removal
- Leaded component configuration for through-hole mounting
Applications
- Overcurrent protection in electronic circuits
- Protection of semiconductor components from shorts
- Circuit safeguarding in power supply systems
Procurement Notes
Verify the specific part number 06R155BU against official Littelfuse documentation to confirm active status and exact electrical ratings. Ensure compatibility with the required operating temperature range and lead spacing specifications for the target application design.
Selection Notes
Select this component based on the required 2.7 A hold current and 40 A maximum current rating. Consider the 100 mOhms resistance and 5.1 mm lead spacing for PCB layout constraints. Verify that the -40°C to +85°C operating range meets the environmental requirements of the end-use system.
Part Context
This component belongs to the PTC Resettable Fuses subcategory under Circuit Protection products. It serves as a reusable alternative to traditional fuses, providing automatic recovery after an overcurrent event has been cleared and the device cools down.
Replacement Considerations
Consult official Littelfuse substitution guides for verified equivalent parts. Do not assume cross-model compatibility without confirming matching electrical parameters and physical dimensions.
