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Eaton SR-5H-3.15A-AP 3.15 A 250/300 Vac Time-Delay Subminiature Fuse
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pEaton SR-5H-3.15A-AP — 3.15 A, 300 V, time-delay fuse, 100 A at rated voltage, 50 Hz interrupting./p
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Eaton SR-5H-3.15A-AP 3.15 A 250/300 Vac Time-Delay Subminiature Fuse
Built by Eaton, the SR-5H-3.15A-AP carries 3.15 A, rated 250/300 Vac, uses a time-delay element.
Technical Data
| Parameter | Rating |
|---|---|
| Parameter | Value |
| Orderable part number | SR-5H-3.15A-AP (-AP = 1,000 pcs ammo pack, 12.7 mm pitch) |
| Rated current | 3.15 A |
| Body | Radial leaded, time-delay, thru-hole, plastic cap and base, UL 94V0 |
| Typical melting I2t | 57 A2s |
| Typical voltage drop | 73 mV at rated current |
| Interrupting rating | 100 A at rated voltage, 50 Hz |
| Agency | cURus E19180 (JDYX2, JDYX8) / VDE / SEMKO / CCC / EK / PSE |
| Rated voltage | 250/300 Vac |
| Characteristic | Time-delay (T) |
| Dissipation at rating | 0.23 W |
| Typical DC cold resistance | 0.018 Ohm |
| Design standard | IEC 60127-3 sheet 4 |
Selection Notes
- Interrupting capability is 100 A at rated voltage, 50 Hz — confirm the circuit's prospective fault current stays below this.
- Time-delay element rides through motor starting and capacitive inrush without nuisance opening.
- Startup surges of several times rated current are tolerated for a short window.
- Working voltage must stay at or below 250/300 Vac; a lower-rated part is not a safe substitute.
- Do not upsize beyond 3.15 A to stop nuisance trips — fix the cause instead.
Typical Applications
Engineers usually specify it for these duties:
- EV
- surge
- transformer
Q&A
What are the ratings of the SR-5H-3.15A-AP?
3.15 A continuous at 250/300 Vac, interrupting rating 100 A at rated voltage, 50 Hz.
Is the SR-5H-3.15A-AP fast-acting or time-delay?
It is time-delay. It tolerates short inrush surges.
Can the SR-5H-3.15A-AP be used on a higher fault-current circuit?
No — its interrupting rating is 100 A at rated voltage, 50 Hz. Choose a part whose breaking capacity exceeds the prospective fault current.
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