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Eaton S500-50-R 50 mA Glass Tube Fuse, Quick-Blow, 250 Vac
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pEaton S500-50-R — 50 mA, 250 V, fast-acting glass cartridge fuse, 35 A at 250 Vac interrupting./p
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Eaton S500-50-R 50 mA Glass Tube Fuse, Quick-Blow, 250 Vac
Built by Eaton, the S500-50-R carries 50 mA, rated 250 Vac, in a glass body.
Technical Data
| Parameter | Rating |
|---|---|
| Part number | S500-50-R |
| End caps | silver-plated 32-125 mA, nickel-plated above |
| AC interrupting rating | 35 A at 250 Vac |
| Typical melting I2t | 0.0001 A²s |
| Design standard | IEC 60127-2 |
| Rated current | 50 mA |
| Element | single element |
| Body | Glass tube, 5 x 20 mm |
| Breaking capacity | 35 A at 250 Vac, 290 A and 1,500 A on the higher ratings |
| Maximum voltage drop | 10,500 mV |
| Typical DC cold resistance | 150 Ω |
| Voltage rating | 250 Vac |
Selection Notes
- Interrupting capability is 35 A at 250 Vac — 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 50 mA 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 S500-50-R?
50 mA continuous at 250 Vac, interrupting rating 35 A at 250 Vac.
Can the S500-50-R be used on a higher fault-current circuit?
No — its interrupting rating is 35 A at 250 Vac. Choose a part whose breaking capacity exceeds the prospective fault current.
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