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Eaton C515-4-R 4 A 5 x 15 mm Time-Delay Glass Tube Fuse
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pEaton C515-4-R — 4 A, 125 V, time-delay glass cartridge fuse, 5 x 15 mm, 400 A at 125 Vac interrupting./p
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Eaton C515-4-R 4 A 5 x 15 mm Time-Delay Glass Tube Fuse
Eaton C515-4-R 4 A 5 x 15 mm Time-Delay Glass Tube Fuse belongs to the Eaton range. It carries 4 A, rated 125 Vac, uses a time-delay element, in a glass body, measuring 5 x 15 mm.
Technical Data
| Parameter | Rating |
|---|---|
| Parameter | Value |
| Orderable part number | C515-4-R |
| Rated current | 4 A |
| Voltage rating | 125 Vac |
| Typical DC cold resistance | 0.023 ohm |
| Interrupting rating | 400 A at 125 Vac |
| Typical melting I2t | 233.346 A²s |
| Max voltage drop at rated current | 130 mV |
| Body | 5 x 15 mm axial |
| Terminals | Tinned copper leads |
| Speed | Time-Delay (UL 248-14) |
| RoHS | Compliant (-R suffix) |
Design Notes
- Interrupting capability is 400 A at 125 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.
- Glass body lets you inspect the element after a fault.
- Best kept for lower fault-current circuits where visual diagnosis matters.
- Footprint 5 x 15 mm — check clip or holder compatibility before substitution.
- Working voltage must stay at or below 125 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
- transformer
Common Questions
What are the ratings of the C515-4-R?
4 A continuous at 125 Vac, interrupting rating 400 A at 125 Vac.
Is the C515-4-R fast-acting or time-delay?
It is time-delay. It tolerates short inrush surges.
What size is the C515-4-R?
It measures 5 x 15 mm. Match the holder or clip to this footprint.
Can the C515-4-R be used on a higher fault-current circuit?
No — its interrupting rating is 400 A at 125 Vac. Choose a part whose breaking capacity exceeds the prospective fault current.
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