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Littelfuse 021706.3 217 Series 6.3 A 5×20mm Glass Tube Through-Hole Fuse
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pLittelfuse 021706.3 — 6.3 A, 250 V, glass cartridge fuse, 63A@250VAC interrupting./p
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Littelfuse 021706.3 217 Series 6.3 A 5×20mm Glass Tube Through-Hole Fuse
Littelfuse 021706.3 217 Series 6.3 A 5×20mm Glass Tube Through-Hole Fuse belongs to the Littelfuse range. It carries 6.3 A, rated 250 VAC, in a glass body.
Technical Data
| Parameter | Rating |
|---|---|
| Parameter | Value |
| Manufacturer / Series | Littelfuse / 217 Series |
| Part number | 021706.3 |
| Fuse characteristic | fast-acting (F) |
| Rated current | 6.3 A |
| Voltage rating | 250 VAC |
| Interrupting rating | 63A@250VAC |
| Nominal cold resistance | 0.009485 Ω |
| Nominal melting I²t | 62.466 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 |
Design Notes
- Interrupting capability is 63A@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 6.3 A to stop nuisance trips — fix the cause instead.
Where It Is Used
Typical places this fuse turns up:
- UPS
- EV
- adapter
- industrial control
- welding
- appliance
Ordering Details
Order code 021706.3 from Littelfuse, supplied in 5 × 20 mm glass tube (IEC 60127-2 Sheet 2). Confirm the exact suffix before release.
Common Questions
What are the ratings of the 021706.3?
6.3 A continuous at 250 VAC, interrupting rating 63A@250VAC.
Can the 021706.3 be used on a higher fault-current circuit?
No — its interrupting rating is 63A@250VAC. Choose a part whose breaking capacity exceeds the prospective fault current.
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