Overview
The Ferraz Shawmut AJT2 is an Amp-Trap 2000® Class J time delay fuse designed for main, feeder, and branch circuit protection in industrial and commercial electrical systems. Rated at 600V AC and 500V DC, this cartridge fuse combines time-delay characteristics with current-limiting capability for reliable protection of motor loads, transformers, and general distribution circuits.
Key Features
- IEC Type 2 No Damage protection with time-delay characteristics ideal for handling typical motor and transformer inrush currents, while also providing superior current-limiting ability
- 200kA@600V AIC (interrupting) rating with compact 0.81" diameter
- Requires only half the mounting space needed for 600VAC Class RK fuses
- SmartSpot® visual open fuse indicator for at-a-glance identification of blown fuses
- UL, CSA, and RoHS approvals
Technical Specifications
- Current Rating: 2A
- AC Voltage Rating: 600V
- DC Voltage Rating: 500V
- Interrupt Rating: 200kA @ 600V AC
- Speed/Characteristic: Time Delay
- Class: Class J
- Shape: Cartridge
- Diameter: 0.81" x Length: 2.25" (20.57 x 57.15mm)
- Certifications: UL, CSA, RoHS
- Series: Amp-Trap 2000 / AJT
Typical Applications
The AJT2 is ideal for protecting circuits with motor loads, transformers, and variable frequency drives. Its time-delay characteristics allow harmless inrush currents to pass without nuisance tripping, while the high current-limiting ability provides fast fault protection. Commonly used in:
- Industrial machinery control circuits
- Motor branch circuits
- Transformer primary circuits
- HVAC and refrigeration systems
- Machine tool installations
Compatibility & Replacements
Compatible With
- Class J fuse holders and rejection clips (UL 248-13 standard)
- 600VAC industrial control panels and motor control centers
- Circuits rated for Class J fuse protection
Replaces / Drop-In Replacement For
- Ferraz Shawmut / Mersen AJT-2 (alternate designation)
- Mersen AJT2 (current manufacturer name)
- Other Class J 2A time delay fuses with matching UL248-13 specifications
Works With
- Standard Class J fuse clips and rejection-type holders
- Industrial electrical distribution systems rated for Class J protection
- Automated fuse monitoring and indication systems compatible with SmartSpot® visual indicators
