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Littelfuse 37308000000 800 mA Fast-Acting (F) TR5® 373 – Tape & Ammopack 0000
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pLittelfuse 37308000000 — integrated circuit, TR5® radial lead fuse; Long leads; Tape amp; Ammopack, 250 V./p
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Littelfuse 37308000000 800 mA Fast-Acting (F) TR5® 373 – Tape & Ammopack 0000
Built by Littelfuse, the 37308000000 carries 800 mA, rated 250 VAC, uses a fast-acting element.
Technical Data
| Parameter | Rating |
|---|---|
| Parameter | Value |
| Manufacturer / Series | Littelfuse / TR5® 373 |
| Part number | 37308000000 |
| Fuse characteristic | Fast-Acting (F) |
| Rated current | 800 mA |
| Rated voltage | 250 VAC |
| Interrupting capability | 50 A @ 250 VAC |
| Package | TR5® radial lead fuse; Long leads; Tape & Ammopack |
| Mounting method | Through Hole, Radial |
| Dimensions | Ø8.5 mm × 8.0 mm max; lead Ø0.6 mm |
| Lead pitch | 5.08 mm |
| Operating temperature | -40°C to +85°C |
| Approvals | cULus E67006; CSA 51378 |
| Standards / compliance | Designed to UL 248-14; cULus E67006; CSA 51378 up to 6.3A |
| Environmental | RoHS; lead-free; halogen-free |
| Packaging / order code | 0000: Tape & Ammopack, 1,000 pcs; Long leads; lead length 18.8 mm |
| Product status | Verify current orderability with Littelfuse / authorized distribution |
Selection Notes
- Interrupting capability is 50 A @ 250 VAC — confirm the circuit's prospective fault current stays below this.
- Fast element suits resistive and semiconductor loads rather than motors with high inrush.
- Because it opens within milliseconds, downstream semiconductors see less let-through energy.
- Working voltage must stay at or below 250 VAC; a lower-rated part is not a safe substitute.
- Do not upsize beyond 800 mA to stop nuisance trips — fix the cause instead.
Typical Applications
Engineers usually specify it for these duties:
- EV
- industrial control
Part Number and Packing
Order code 37308000000 from Littelfuse, supplied in TR5® radial lead fuse; Long leads; Tape & Ammopack. Confirm the exact suffix before release.
Q&A
What are the ratings of the 37308000000?
800 mA continuous at 250 VAC, interrupting rating 50 A @ 250 VAC.
Is the 37308000000 fast-acting or time-delay?
It is fast-acting. Expect it to open quickly on overload.
Can the 37308000000 be used on a higher fault-current circuit?
No — its interrupting rating is 50 A @ 250 VAC. Choose a part whose breaking capacity exceeds the prospective fault current.
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