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Littelfuse 2011100043 201 Series 1.0 A 5×20mm Glass Tube Through-Hole Fuse
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pLittelfuse 2011100043 — 1 A, 250 V, glass cartridge fuse, 80A@250VAC interrupting./p
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Littelfuse 2011100043 201 Series 1.0 A 5×20mm Glass Tube Through-Hole Fuse
The 2011100043 from Littelfuse carries 1.0 A, rated 250 VAC, in a glass body.
Technical Data
| Parameter | Rating |
|---|---|
| Parameter | Value |
| Manufacturer / Series | Littelfuse / 201 Series |
| Part number | 2011100043 |
| Fuse characteristic | medium time-lag (M) |
| Rated current | 1.0 A |
| Voltage rating | 250 VAC |
| Interrupting rating | 80A@250VAC |
| Nominal cold resistance | see datasheet |
| Nominal melting I²t | 2 A²·s |
| Package / mounting | 5 × 20 mm glass tube |
| Operating temperature | -25-70 °C |
| Agency / environmental | UL 248-14 / IEC 60127-2 compliant, RoHS compliant and lead-free |
Practical Notes
- Interrupting capability is 80A@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 1.0 A to stop nuisance trips — fix the cause instead.
Application Scenarios
Common installation contexts include:
- UPS
- EV
- adapter
- industrial control
- lighting
- appliance
Buying Notes
Order code 2011100043 from Littelfuse, supplied in 5 × 20 mm glass tube. Confirm the exact suffix before release.
Questions and Answers
What are the ratings of the 2011100043?
1.0 A continuous at 250 VAC, interrupting rating 80A@250VAC.
Can the 2011100043 be used on a higher fault-current circuit?
No — its interrupting rating is 80A@250VAC. Choose a part whose breaking capacity exceeds the prospective fault current.
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