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Littelfuse 0315.040 315 Series 40 mA 3AG Glass Tube Through-Hole Fuse
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pLittelfuse 0315.040 — 40 mA, 250 V, glass cartridge fuse, 10000A@125VAC interrupting./p
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Littelfuse 0315.040 315 Series 40 mA 3AG Glass Tube Through-Hole Fuse
The 0315.040 from Littelfuse carries 40 mA, rated 250 VAC, in a glass body.
Technical Data
| Parameter | Rating |
|---|---|
| Parameter | Value |
| Manufacturer / Series | Littelfuse / 315 Series |
| Part number | 0315.040 |
| Fuse characteristic | time-delay (Slo-Blo®) |
| Rated current | 40 mA |
| Voltage rating | 250 VAC |
| Interrupting rating | 10000A@125VAC |
| Nominal cold resistance | 300 Ω |
| Nominal melting I²t | 0.0063 A²·s |
| Package / mounting | 3AG glass tube (6.3 × 32 mm) |
| Operating temperature | -55-125 °C |
| Agency / environmental | UL 248-14 / IEC 60127-2 compliant, RoHS compliant and lead-free |
Practical Notes
- Interrupting capability is 10000A@125VAC — 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 40 mA to stop nuisance trips — fix the cause instead.
Application Scenarios
Common installation contexts include:
- EV
- adapter
- industrial control
- appliance
- metering
- transformer
Buying Notes
Order code 0315.040 from Littelfuse, supplied in 3AG glass tube (6.3 × 32 mm). Confirm the exact suffix before release.
Questions and Answers
What are the ratings of the 0315.040?
40 mA continuous at 250 VAC, interrupting rating 10000A@125VAC.
Can the 0315.040 be used on a higher fault-current circuit?
No — its interrupting rating is 10000A@125VAC. Choose a part whose breaking capacity exceeds the prospective fault current.
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