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Eaton SR-5-4A-AP 4 A 250 Vac Time-Delay Subminiature Fuse
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pEaton SR-5-4A-AP — 4 A, 250 V, time-delay fuse, 40 A at rated voltage, 50 Hz interrupting./p
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Eaton SR-5-4A-AP 4 A 250 Vac Time-Delay Subminiature Fuse
Built by Eaton, the SR-5-4A-AP rated 250 Vac, uses a time-delay element.
Technical Data
| Parameter | Rating |
|---|---|
| Parameter | Value |
| Orderable part number | SR-5-4A-AP (-AP = 1,000 pcs ammo pack, 12.7 mm pitch) |
| Melting I2t (typical) | 80 A2s |
| Typical DC cold resistance | 0.012 Ohm |
| Interrupting rating | 40 A at rated voltage, 50 Hz |
| Characteristic | Time-delay (T) |
| In (rated) | 4 A |
| Voltage rating | 250 Vac |
| Dissipation at rating | 0.25 W |
| Typical voltage drop | 62 mV at rated current |
| Body | Radial leaded, time-delay, thru-hole, plastic cap and base, UL 94V0 |
| Design standard | IEC 60127-3 sheet 4 |
| Agency | VDE 40020842 / cURus E19180 (JDYX8, JDYX2) / CCC / PSE / SEMKO / KC |
Selection Notes
- Interrupting capability is 40 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 Vac; a lower-rated part is not a safe substitute.
Typical Applications
Engineers usually specify it for these duties:
- EV
- adapter
- surge
Q&A
Is the SR-5-4A-AP fast-acting or time-delay?
It is time-delay. It tolerates short inrush surges.
Can the SR-5-4A-AP be used on a higher fault-current circuit?
No — its interrupting rating is 40 A at rated voltage, 50 Hz. Choose a part whose breaking capacity exceeds the prospective fault current.
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