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Eaton C515-1.25-R 1.25 A 5 x 15 mm Time-Delay Glass Tube Fuse
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pEaton C515-1.25-R — 1.25 A, 250 V, time-delay glass cartridge fuse, 5 x 15 mm, 100 A at 250 Vac; 10000 A at 125 Vac interrupting./p
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Eaton C515-1.25-R 1.25 A 5 x 15 mm Time-Delay Glass Tube Fuse
The C515-1.25-R from Eaton carries 1.25 A, rated 250 Vac, uses a time-delay element, in a glass body, measuring 5 x 15 mm.
Technical Data
| Parameter | Rating |
|---|---|
| Parameter | Value |
| Orderable part number | C515-1.25-R |
| Rated current | 1.25 A |
| Voltage rating | 250 Vac |
| Interrupting rating | 100 A at 250 Vac; 10000 A at 125 Vac |
| Typical DC cold resistance | 0.13 ohm |
| Typical melting I2t | 22.961 A²s |
| Max voltage drop at rated current | 220 mV |
| Body | 5 x 15 mm axial |
| Terminals | Tinned copper leads |
| Speed | Time-Delay (UL 248-14) |
| RoHS | Compliant (-R suffix) |
Practical Notes
- Interrupting capability is 100 A at 250 Vac; 10000 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 250 Vac; a lower-rated part is not a safe substitute.
- Do not upsize beyond 1.25 A to stop nuisance trips — fix the cause instead.
Application Scenarios
Common installation contexts include:
- surge
- transformer
Questions and Answers
What are the ratings of the C515-1.25-R?
1.25 A continuous at 250 Vac, interrupting rating 100 A at 250 Vac; 10000 A at 125 Vac.
Is the C515-1.25-R fast-acting or time-delay?
It is time-delay. It tolerates short inrush surges.
What size is the C515-1.25-R?
It measures 5 x 15 mm. Match the holder or clip to this footprint.
Can the C515-1.25-R be used on a higher fault-current circuit?
No — its interrupting rating is 100 A at 250 Vac; 10000 A at 125 Vac. Choose a part whose breaking capacity exceeds the prospective fault current.
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