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Eaton SR-5F-7A-AP 7 A 125 Vac Fast-Acting Subminiature Fuse
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pEaton SR-5F-7A-AP — 7 A, 125 V, fast-acting fuse, 50 A at rated voltage, 50 Hz interrupting./p
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Eaton SR-5F-7A-AP 7 A 125 Vac Fast-Acting Subminiature Fuse
Built by Eaton, the SR-5F-7A-AP carries 7 A, rated 125 Vac, uses a fast-acting element.
Technical Data
| Parameter | Rating |
|---|---|
| Parameter | Value |
| Orderable part number | SR-5F-7A-AP (-AP = 1,000 pcs ammo pack, 12.7 mm pitch) |
| Characteristic | Fast-acting (F) |
| Design standard | UL 248-14 |
| Body | Radial leaded, fast-acting, plastic cap and base, UL 94V0 |
| Voltage drop (typical) | 250 mV at rated current |
| Current rating | 7 A |
| Agency | cULus E19180 (JDXY1, JDYX7) / PSE JET5766 |
| Typical DC cold resistance | 0.011 Ohm |
| Maximum power dissipation at 1 In | 1750 mW |
| Dissipation at rating | 1.75 W |
| Voltage rating | 125 Vac |
| Interrupting rating | 50 A at rated voltage, 50 Hz |
| I2t, typical melting | 107 A2s |
Selection Notes
- Interrupting capability is 50 A at rated voltage, 50 Hz — confirm the circuit's prospective fault current stays below this.
- Fast element suits resistive and semiconductor loads rather than motors with high inrush.
- Because it opens within milliseconds, downstream semiconductors see less let-through energy.
- Working voltage must stay at or below 125 Vac; a lower-rated part is not a safe substitute.
- Do not upsize beyond 7 A to stop nuisance trips — fix the cause instead.
Typical Applications
Engineers usually specify it for these duties:
- EV
- adapter
Q&A
What are the ratings of the SR-5F-7A-AP?
7 A continuous at 125 Vac, interrupting rating 50 A at rated voltage, 50 Hz.
Is the SR-5F-7A-AP fast-acting or time-delay?
It is fast-acting. Expect it to open quickly on overload.
Can the SR-5F-7A-AP be used on a higher fault-current circuit?
No — its interrupting rating is 50 A at rated voltage, 50 Hz. Choose a part whose breaking capacity exceeds the prospective fault current.
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