Configured for circuit protection, Littelfuse 37211250431 provides 1.25A time-lag protection at 250V AC in the TR5 radial format. The through-hole fuse uses short radial leads, a compact Ø8.5 × 8mm maximum body, and published breaking capability of 35A @ 250VAC. Its melting integral at 10× rated current is 13.75 A²s for coordination work. Check ambient derating and available fault current against the manufacturer data before final selection. Compare speed, approvals and mounting details before treating another fuse as an equivalent.
Technical Specifications
- Part Number
- 37211250431
- Manufacturer Part Number
- 37211250431
- Series
- 372 Series
- Fuse Type
- TR5 Radial Time-Lag Fuse
- Current Rating
- 1.25A
- Voltage Rating
- 250V AC
- AC / DC
- AC
- Breaking Capacity
- 35A @ 250VAC
- I²t
- Melting integral at 10×In: 13.75 A²s
- Pre-arcing I²t
- 13.75
- Operating Temperature
- -40°C to +85°C
- Package / Dimensions
- TR5 Radial
- Mounting
- PCB Through-Hole
- Application
- Battery chargers · Consumer Electronics · Industrial Controls · Power supplies
- Standard
- IEC 60127-3 · UL/CSA/NMX 248-1 and 248-14
- Terminal Type
- Short Radial Leads
- Fuse Speed
- Time Delay
- Utilization Class
- TR5
- Approvals
- CSA · IEC · NMX · UL Recognized
- Certifications
- IEC · UL Recognized · CSA · NMX
- Ordering package code
- 0431
- Packaging / lead option
- Bulk, Short Leads
- Pack quantity
- 200 pcs
- Melting integral at 10×In
- 13.75 A²s