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Bussmann S500-1.25-R 1.25A 250V Fast-Acting Glass Fuse
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pBussmann S500-1.25-R — 1.25 A, 250 V, fast-acting glass cartridge fuse./p
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Bussmann S500-1.25-R 1.25A 250V Fast-Acting Glass Fuse
Built by Bussmann, the S500-1.25-R carries 1.25 A, rated 250V, uses a fast-acting element, in a glass body.
Technical Data
| Parameter | Rating |
|---|---|
| Specification | Value |
| Manufacturer | Eaton Bussmann |
| Series | S500/S501/S505/S505H/S506 Series |
| Part Number | S500-1.25-R |
| Current Rating | 1.25A |
| Voltage Rating | 250V |
| Fuse Type | Fast-Acting |
| Body Material | Glass Tube |
| Breaking Capacity | Low Breaking Capacity (LBC) |
| Dimensions | 5mm x 20mm (0.197" x 0.787") |
| Mounting Type | Cartridge / Holder Mount |
| Response Time | Rapid response to fault currents |
| Operating Temperature | -55°C to +125°C |
| Compliance | RoHS, REACH, CE Compliant |
Selection Notes
- 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.
- Working voltage must stay at or below 250V; a lower-rated part is not a safe substitute.
- Do not upsize beyond 1.25 A to stop nuisance trips — fix the cause instead.
Typical Applications
Engineers usually specify it for these duties:
- solar
- inverter
- battery
- EV
- telecom
- power supply
Q&A
What are the ratings of the S500-1.25-R?
1.25 A continuous at 250V.
Is the S500-1.25-R fast-acting or time-delay?
It is fast-acting. Expect it to open quickly on overload.
Shenzhen Gaorunxin Technology Co., Ltd
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