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Eaton S500-80-R 80 mA Fast-Blow 5 x 20 mm Glass Fuse
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pEaton S500-80-R — 80 mA, 250 V, fast-acting glass cartridge fuse, 5 x 20 mm, 35 A at 250 Vac interrupting./p
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Eaton S500-80-R 80 mA Fast-Blow 5 x 20 mm Glass Fuse
The S500-80-R from Eaton carries 80 mA, rated 250 Vac, uses a fast-acting element, in a glass body, measuring 5 x 20 mm.
Technical Data
| Parameter | Rating |
|---|---|
| Part number | S500-80-R |
| Typical melting I2t | 0.0008 A²s |
| AC interrupting rating | 35 A at 250 Vac |
| Design standard | IEC 60127-2 |
| Body | Glass tube, 5 x 20 mm |
| Element | single element |
| Typical DC cold resistance | 22 Ω |
| Voltage rating | 250 Vac |
| Breaking capacity | 35 A at 250 Vac, 290 A and 1,500 A on the higher ratings |
| End caps | silver-plated 32-125 mA, nickel-plated above |
| Rated current | 80 mA |
| Maximum voltage drop | 3,000 mV |
Practical Notes
- Interrupting capability is 35 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.
- Glass body lets you inspect the element after a fault.
- Best kept for lower fault-current circuits where visual diagnosis matters.
- 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 80 mA to stop nuisance trips — fix the cause instead.
Application Scenarios
Common installation contexts include:
- EV
- transformer
Questions and Answers
What are the ratings of the S500-80-R?
80 mA continuous at 250 Vac, interrupting rating 35 A at 250 Vac.
Is the S500-80-R fast-acting or time-delay?
It is fast-acting. Expect it to open quickly on overload.
What size is the S500-80-R?
It measures 5 x 20 mm. Match the holder or clip to this footprint.
Can the S500-80-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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