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Eaton S501-100-R 100 mA Fuse 250 Vac Fast-Acting (5 x 20 mm)
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pEaton S501-100-R — 100 mA, 250 V, fast-acting fuse, 5 x 20 mm, 1,500 A at 250 Vac interrupting./p
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Eaton S501-100-R 100 mA Fuse 250 Vac Fast-Acting (5 x 20 mm)
Eaton S501-100-R 100 mA Fuse 250 Vac Fast-Acting (5 x 20 mm) belongs to the Eaton range. It carries 100 mA, rated 250 Vac, uses a fast-acting element, measuring 5 x 20 mm.
Technical Data
| Parameter | Rating |
|---|---|
| Part number | S501-100-R |
| Design standard | IEC 60127-2 |
| Typical DC cold resistance | 20 Ω |
| End caps | silver-plated 50-400 mA, nickel-plated 500 mA-10 A |
| AC interrupting rating | 1,500 A at 250 Vac |
| Body | Ceramic tube, 5 x 20 mm |
| Breaking capacity | 1,500 A at 250 Vac across the whole range |
| Maximum voltage drop | 2,300 mV |
| Voltage rating | 250 Vac |
| Typical melting I2t | 0.0018 A²s |
| Element | single element |
| Rated current | 100 mA |
Design Notes
- Interrupting capability is 1,500 A at 250 Vac — 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.
- 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 100 mA 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 S501-100-R?
100 mA continuous at 250 Vac, interrupting rating 1,500 A at 250 Vac.
Is the S501-100-R fast-acting or time-delay?
It is fast-acting. Expect it to open quickly on overload.
What size is the S501-100-R?
It measures 5 x 20 mm. Match the holder or clip to this footprint.
Can the S501-100-R be used on a higher fault-current circuit?
No — its interrupting rating is 1,500 A at 250 Vac. Choose a part whose breaking capacity exceeds the prospective fault current.
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