Showing 17–29 of 29 results
If you’re unsure which fuse your system requires, our technicians can cross-reference your
UPS make, model, and kVA rating to ensure correct voltage class,
interrupt rating, and physical mounting style.
| Fuse Type | Style / Mounting | Typical UPS Use | Notes |
|---|---|---|---|
| High-Speed / Semiconductor |
Square-body (DIN 43620) Blade / Flat contact Bolt-down terminations |
IGBT / SCR protection, rectifier/inverter sections | Very fast acting; designed to protect power semiconductors. |
| Current-Limiting |
Cylindrical (Class J / CC / RK) Ferrule or clip-in holders |
Control power, auxiliary feeds, smaller UPS inputs | Limits peak fault current; common in branch circuits. |
| High-Amp AC (Power) |
Bolt-on “knife-blade” / stud mount Square-body power fuses |
UPS input, bypass, output distribution (high current) | Verify voltage class & interrupt rating (AIC) before replacement. |
| DC Rated (Battery String) |
Bolt-on / stud mount Inline battery fuse blocks |
Battery cabinets, DC bus protection, string isolation | Must be DC rated for the system voltage (125V/250V/480V DC, etc.). |
| Time-Delay / Slow-Blow |
Cartridge (Class RK5/RK1, etc.) Holder/clip mount |
Transformer inrush, fan feeds, some charger circuits | Tolerates short inrush surges while still protecting downstream wiring. |
| Fast-Acting |
Cartridge / glass / ceramic Holder/clip mount |
Control boards, sensing circuits, low-power protection | Quick response; match the exact rating to avoid nuisance blows. |
