$99.99
| Voltage | WPC | AH/kVA | Length | Width | Height | Weight |
|---|---|---|---|---|---|---|
| 700 V | N/A | 400 A | 129.3mm | 50.80mm | n/a | .77kg |
| Voltage | 700 V |
| WPC | N/A |
| Amp/H | 400 A |
| Length | 129.3mm |
| Width | 50.80mm |
| Height | n/a |
| Weight | .77kg |
The BUSSMANN FWP-400A is a North American–style high-speed (fast-acting) bolted-tag fuse engineered for reliable over-current protection in UPS and power-electronic systems. It safeguards rectifiers, inverters, and DC common-bus rails with low let-through energy. This listing features reclaimed, continuity-tested units removed from decommissioned, fully functional equipment.
High-Speed Protection:
Fast-acting element tailored for semiconductor applications with low I²t.
Bolted-Tag Cartridge:
Blade-end fuse body (non-indicating) for robust, low-impedance stud mounting.
AC / DC Capability:
Rated 700Â VÂ AC / 700Â VÂ DC with 200Â kA AC interrupting rating and 50Â kA DC capacity at 700Â V.
Reclaimed & Verified:
Each unit is continuity-tested and visually inspected; OEM-new stock available by request.
| Parameter | Value |
| Manufacturer | BUSSMANN (Eaton) |
| Part Number | FWP-400A |
| Fuse Type / Category | High-speed semiconductor fuse (fast-acting), non-indicating |
| Rated Voltage | 700Â VÂ AC / 700Â VÂ DC |
| Rated Current | 400Â A |
| Interrupting Capacity | 200Â kA (AC @ 700Â V) Â |Â 50Â kA (DC @ 700Â V) |
| Indicator | None (non-indicating) |
| Body / Size | Bolted-tag cartridge; Ø 2.000 in body |
| Terminals / Mounting | Bolt-down blade ends; Ø 0.41 in holes on 1.50 in centers (stud-mount) |
| Pre-arcing I²t @ 700 V | 31,000 A²s |
| Clearing I²t @ 700 V | 125,000 A²s |
| Power Loss (at rated) | 78Â W |
| Dimensions (L × Ø) | 5.09 in × 2.000 in  (129.3 mm × 50.8 mm) |
| Approx. Weight | ≈ 1.7 lb  (≈ 0.77 kg) |
| Compliance / Approvals | UL Recognized; CSA Component Acceptance; CE-marked; RoHS compliant |
| UPC / EAN | UPC 051712150439  | EAN — |
| Fuse | Compatible UPS/Power-Electronics Models | Notes |
| FWP-400A | Used in UPS frames, DC drives, and converter stacks specifying BUSSMANN FWP 700 V high-speed fuses in the 400 A class. | Verify bolt pattern (≈ Ø 0.41 in holes on 1.50 in centers) and body size (≈ 5.09 in × 2.00 in) against the OEM part/BOM. |
