Mersen Amp-Trap 2000® AJT Fuses
May 29, 2026
Amp-Trap 2000® AJT fuses provide non-indication as well as a SmartSpot visual open fuse indicator. With advanced material technology the AJT fuse provides IEC Type 2 No Damage protection to main, feeder, and branch circuits, for all types of loads — yet, they require only half the mounting space needed for 600VAC Class RK fuses. AJT’s time-delay characteristics are ideal for handling typical motor and transformer inrush currents, while also providing superior current-limiting ability.
Features
- Non-indicating or solid state SmartSpot visual blown fuse indicator
- Time-delay for motor starting and transformer inrush
- Self Certified 700VAC, 15-600A range, 100kA IR
- 300kA interrupting rating – self-certified, UL witnessed tests
- Extremely current-limiting for low peak let-thru current
- Most current-limiting UL class fuse
- Recommended for Arc Flash energy reduction
- Small footprint requires less mounting space and allows smaller, more economical fuse blocks
- Easy 2-to-1 selectivity for prevention of nuisance shutdowns
- Unique Class J dimensions prevent replacement errors
- High-visibility orange label gives instant brand recognition
- Metal-embossed date and catalog number for traceability and lasting identification
- Fiberglass body provides dimensional stability in harsh industrial settings
- High-grade silica filler ensures fast arc quenching
- Optional EI indicator/switch mount for AJT70 to 600 open fuse indication
Applications
- Motor circuits
- Mains
- Feeders
- Branch circuits
- Lighting, heating & general loads
- Transformers
- Control panels
- Circuit breaker back-up
- Bus duct
- Load centers
Technical Specifications
| Frequency (Hz) | 50/60 Hz |
| Amperage Range | 1 to 600 A |
| Fuse Class | Class J |
| Speed/Characteristic | Time Delay |
| UL Category Code | JDDZ |
| CSA File Number | Class 1422-02 Guide 012636_0 |
| Reach Compliant | Yes |
| Max Operating Temp. | 80 °C |
| Max Storage Temp. | 80 °C |
| Min Storage Temp. | -25 °C |
| Harmonized System | 853610 |
| UL File Number | File E2137 |
