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Eaton S500-4-R 4 A Fuse 250 Vac Quick-Blow (5 x 20 mm)
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pEaton S500-4-R — 4 A, 250 V, fast-acting fuse, 5 x 20 mm, 40 A at 250 Vac interrupting./p
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Eaton S500-4-R 4 A Fuse 250 Vac Quick-Blow (5 x 20 mm)
Eaton S500-4-R 4 A Fuse 250 Vac Quick-Blow (5 x 20 mm) belongs to the Eaton range. It carries 4 A, rated 250 Vac, measuring 5 x 20 mm.
Technical Data
| Parameter | Rating |
|---|---|
| Part number | S500-4-R |
| Typical melting I2t | 22 A²s |
| Typical DC cold resistance | 0.021 Ω |
| Rated current | 4 A |
| Maximum voltage drop | 130 mV |
| Element | single element |
| End caps | silver-plated 32-125 mA, nickel-plated above |
| AC interrupting rating | 40 A at 250 Vac |
| Breaking capacity | 35 A at 250 Vac, 290 A and 1,500 A on the higher ratings |
| Body | Glass tube, 5 x 20 mm |
| Design standard | IEC 60127-2 |
| Voltage rating | 250 Vac |
Design Notes
- Interrupting capability is 40 A at 250 Vac — confirm the circuit's prospective fault current stays below this.
- Footprint 5 x 20 mm — check clip or holder compatibility before substitution.
- Working voltage must stay at or below 250 Vac; a lower-rated part is not a safe substitute.
- Do not upsize beyond 4 A to stop nuisance trips — fix the cause instead.
Where It Is Used
Typical places this fuse turns up:
- EV
Common Questions
What are the ratings of the S500-4-R?
4 A continuous at 250 Vac, interrupting rating 40 A at 250 Vac.
What size is the S500-4-R?
It measures 5 x 20 mm. Match the holder or clip to this footprint.
Can the S500-4-R be used on a higher fault-current circuit?
No — its interrupting rating is 40 A at 250 Vac. Choose a part whose breaking capacity exceeds the prospective fault current.
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