Overview
The Littelfuse R251005T1 is a PICO® II Series very fast-acting axial fuse designed for reliable overcurrent protection in compact industrial and commercial applications. This 5A 125V fuse delivers rapid response to fault conditions while maintaining a subminiature footprint ideal for space-constrained circuit boards and equipment.
Key Features
- Very Fast Acting Response: Optimized for quick fault detection and circuit interruption to minimize equipment damage
- Subminiature Package: Space-saving axial lead design compatible with both through-hole and ammo pack configurations
- Rated 5A @ 125V: Standard amperage and voltage rating for common industrial control and consumer electronics applications
- T1 Lead Configuration: Default axial lead length per Littelfuse 251 Series standard
- Industrial Grade: Proven performance across decades of field deployment in automation, HVAC, and electronics equipment
Technical Specifications
- Rated Current: 5A
- Rated Voltage: 125V
- Speed: Very Fast Acting
- Package Type: Axial Lead
- Lead Configuration: T1 (standard for 251 Series)
- Overall Length: 62.7mm (2.468″)
- Series: Littelfuse PICO II 251
- Part Number: R251005T1
Typical Applications
- Industrial control circuits and PLC protection
- HVAC and refrigeration equipment
- Consumer electronics and appliances
- Power supply circuits requiring fast fault response
- Equipment requiring subminiature fuse form factor
Compatibility & Replacements
Compatible With
- Standard through-hole PCB footprints for 251 Series PICO fuses
- Ammo pack mechanical feeders and insertion equipment
- Equipment designed for Littelfuse PICO II 251 Series replacement fuses
Replaces / Drop-In Replacement For
- Original equipment manufacturer (OEM) installations calling for Littelfuse 251005 or R251005T1
- Legacy equipment requiring 5A 125V very fast acting axial fuses in subminiature package
Works With
- Littelfuse PICO II 251 Series tooling and mechanical specifications
- Standard circuit protection practices for industrial controls and power electronics
- Both automated and manual insertion assembly processes
