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Littelfuse 02171.25 217 Series 1.25 A 5×20mm Glass Tube Through-Hole Fuse
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pLittelfuse 02171.25 — 1.25 A, 250 V, glass cartridge fuse, 35A@250VAC interrupting./p
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Littelfuse 02171.25 217 Series 1.25 A 5×20mm Glass Tube Through-Hole Fuse
Built by Littelfuse, the 02171.25 carries 1.25 A, rated 250 VAC, in a glass body.
Technical Data
| Parameter | Rating |
|---|---|
| Parameter | Value |
| Manufacturer / Series | Littelfuse / 217 Series |
| Part number | 02171.25 |
| Fuse characteristic | fast-acting (F) |
| Rated current | 1.25 A |
| Voltage rating | 250 VAC |
| Interrupting rating | 35A@250VAC |
| Nominal cold resistance | 0.0701 Ω |
| Nominal melting I²t | 2.23 A²·s |
| Package / mounting | 5 × 20 mm glass tube (IEC 60127-2 Sheet 2) |
| Operating temperature | 4 °C |
| Agency / environmental | UL 248-14 / IEC 60127-2 compliant, RoHS compliant and lead-free |
Selection Notes
- Interrupting capability is 35A@250VAC — confirm the circuit's prospective fault current stays below this.
- Glass body lets you inspect the element after a fault.
- Best kept for lower fault-current circuits where visual diagnosis matters.
- Working voltage must stay at or below 250 VAC; a lower-rated part is not a safe substitute.
- Do not upsize beyond 1.25 A to stop nuisance trips — fix the cause instead.
Typical Applications
Engineers usually specify it for these duties:
- UPS
- adapter
- industrial control
- lighting
- appliance
- surge
Part Number and Packing
Order code 02171.25 from Littelfuse, supplied in 5 × 20 mm glass tube (IEC 60127-2 Sheet 2). Confirm the exact suffix before release.
Q&A
What are the ratings of the 02171.25?
1.25 A continuous at 250 VAC, interrupting rating 35A@250VAC.
Can the 02171.25 be used on a higher fault-current circuit?
No — its interrupting rating is 35A@250VAC. Choose a part whose breaking capacity exceeds the prospective fault current.
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