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Eaton SR-5H-1.25A-APH 1.25 A 300 Vac Time-Delay Subminiature Fuse
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pEaton SR-5H-1.25A-APH — 1.25 A, 300 V, time-delay fuse, 100 A at 300 Vac interrupting./p
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Eaton SR-5H-1.25A-APH 1.25 A 300 Vac Time-Delay Subminiature Fuse
Built by Eaton, the SR-5H-1.25A-APH carries 1.25 A, rated 300 Vac, uses a time-delay element.
Technical Data
| Parameter | Rating |
|---|---|
| Parameter | Value |
| Orderable part number | SR-5H-1.25A-APH (-APH = 1,000 pcs ammo pack, 12.7 mm pitch) |
| Typical voltage drop | 88 mV at rated current |
| Dissipation at rating | 0.11 W |
| Body | Radial leaded thru-hole, plastic cap and base, UL 94V0 |
| Pre-arcing I2t (typical) | 13 A2s |
| Characteristic | Time-delay (T), high inrush withstand |
| Agency | cURus E19180 (JDYX2, JDYX8); VDE 40020842; SEMKO 1414025; CCC 2009010207369246; EK SU05011-9005; PSE JET1641-31007-1006 |
| Typical DC cold resistance | 0.06 Ohm |
| Packaging family | -APH ammo pack / -BKH 200 in polybag / -BK2H 200 long lead |
| Voltage rating | 300 Vac |
| Interrupting rating | 100 A at 300 Vac |
| Design standard | IEC 60127-3 sheet 4 |
| Current rating | 1.25 A |
Selection Notes
- Interrupting capability is 100 A at 300 Vac — 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 300 Vac; a lower-rated part is not a safe substitute.
- Do not upsize beyond 1.25 A to stop nuisance trips — fix the cause instead.
Typical Applications
Engineers usually specify it for these duties:
- lighting
- surge
Part Number and Packing
Order code SR-5H-1.25A-APH from Eaton, supplied in -APH ammo pack / -BKH 200 in polybag / -BK2H 200 long lead. Confirm the exact suffix before release.
Q&A
What are the ratings of the SR-5H-1.25A-APH?
1.25 A continuous at 300 Vac, interrupting rating 100 A at 300 Vac.
Is the SR-5H-1.25A-APH fast-acting or time-delay?
It is time-delay. It tolerates short inrush surges.
Can the SR-5H-1.25A-APH be used on a higher fault-current circuit?
No — its interrupting rating is 100 A at 300 Vac. Choose a part whose breaking capacity exceeds the prospective fault current.
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