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OEM Part Number
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$159.00
| Voltage | AH/kVA | Length | Width | Height | Weight |
|---|---|---|---|---|---|
| 600 V AC | 500 A | N/A | N/A | N/A | N/A |
| Voltage | 600 V AC |
| Amp/H | 500 A |
| Length | N/A |
| Width | N/A |
| Height | N/A |
| Weight | N/A |
The FERRAZ SHAWMUT AJT500EI is an Amp-Trap 2000® Class J time-delay fuse with SmartSpot® visual indication for protecting rectifiers, inverters, and distribution feeders in UPS and power-electronic systems. This listing features reclaimed, continuity-tested units removed from decommissioned, fully functional equipment.
Time-Delay, Current-Limiting:
Handles motor/transformer inrush while providing very low let-through energy (Class J).
SmartSpot® Indicator (EI):
Built-in visual blown-fuse indicator with optional microswitch kits for remote status.
Compact Class J Footprint:
Smaller than RK fuses for tighter panels; knife-blade ends fit standard Class J holders/blocks.
Reclaimed & Verified:
Each unit is continuity-tested and visually inspected; new Mersen stock available by request.
| Parameter | Value |
| Manufacturer | Ferraz Shawmut (Mersen) |
| Part Number | AJT500EI |
| Fuse Type / Category | UL Class J, time-delay (Amp-Trap 2000®), indicating (SmartSpot®) |
| Rated Voltage | 600 V AC / 500 V DC |
| Rated Current | 500 A |
| Interrupting Capacity | 200 kA (AC @ 600 V) | 100 kA (DC @ 500 V) |
| Indicator | SmartSpot® EI visual indicator; microswitch option available |
| Body / Size | Class J cartridge, knife-blade ends |
| Terminals / Mounting | Knife-blade; holder/clip mounted in Class J blocks |
| Pre-arcing I²t | Per AJT series table (500 A) |
| Clearing I²t | Per AJT series table @ 60 Hz |
| Power Loss (at rated) | See datasheet |
| Dimensions | Standard Class J outline (refer to AJT datasheet drawing for exact size) |
| Approx. Weight | — |
| Compliance / Approvals | UL 248-8 Listed; CSA; RoHS; IEC Type 2 (No-Damage) protection capability |
| UPC / EAN | UPC 78200196162 |
| Fuse | Compatible UPS/Power-Electronics Models | Notes |
| AJT500EI | UPS frames, distribution feeders, DC drives, and converter stacks specifying 600 VAC/500 VDC Class J time-delay fuses in the 500 A range. | Verify Class J holder compatibility and EI indicator requirement; match exact OEM part/BOM prior to ordering. |
