Mersen Amp-Trap 2000® AJT Series Class J Time-Delay Ferrule Fuse, 600VAC

Mersen Amp-Trap 2000® AJT Series Class J Time-Delay Ferrule Fuse, 600VAC

The Mersen Amp-Trap 2000® AJT fuse is a Class J, time-delay, ferrule-terminal fuse rated 600VAC / 500VDC with a 200 kA AC breaking capacity, engineered to protect main, feeder, and branch circuits across a wide range of loads. This family is available across a Motor FLA range from 1.25A up to 12A, letting engineers and electricians select the precise current rating needed for a given motor or branch-circuit application while relying on the same proven Class J platform. Built with advanced material technology, the AJT delivers IEC Type 2 No Damage protection while requiring only half the mounting space of comparable 600VAC Class RK fuses. Its time-delay characteristic is ideal for handling typical motor and transformer inrush currents while providing superior current-limiting performance, and the SmartSpot visual open-fuse indicator supports fast field diagnosis.

Key Features

• Amp Rating Range: Available across Motor FLA ratings from 1.25A to 12A to match specific motor and branch-circuit load requirements.
• Connection/Terminal Type: Ferrule terminals constructed of tin-plated copper for a reliable, low-resistance connection.
• Mounting: Clip-mount design for standard fuse block and holder compatibility.
• Rated Voltage: 600VAC and 500VDC (UL), supporting both AC and DC circuit applications.
• Breaking Capacity: 200 kA AC interrupt rating (I1) for high fault-current environments.
• Fuse Class: Class J for compact, current-limiting overcurrent protection.
• Speed/Characteristic: Time-delay operation suited to motor and transformer inrush currents.
• Body/Insulating Material: GMG construction for durable, high-temperature performance.
• Frequency: Rated 50/60 Hz for standard AC power systems.

Certifications & Compliance

• RoHS Compliant
• UL Rated Voltage: 600VAC / 500VDC

Technical Specifications

• ROHS Compliant: Yes
• Rated voltage AC UL: 600 V
• Rated voltage DC UL: 500 V
• Speed/Characteristic: Time Delay
• AC or DC: AC/DC
• Body/Insulating Material: GMG

Typical Applications

• Main, Feeder, and Branch Circuit Protection
• Motor and Transformer Inrush Current Protection
• Industrial and Commercial Electrical Panels
• Current-Limiting Overcurrent Protection
• Panelboard and Switchgear Fuse Replacement

Why Mersen?

Mersen's Amp-Trap 2000® AJT fuses combine advanced GMG body construction with tin-plated copper ferrule terminals to deliver dependable, code-compliant overcurrent protection across the full 1.25A-12A Motor FLA range. With IEC Type 2 No Damage performance, a 200 kA breaking capacity, and RoHS-compliant materials, these Class J fuses are built for demanding motor, transformer, and branch-circuit applications where reliability and compact mounting matter, giving electrical contractors and panel builders a single trusted platform across their full range of current ratings.