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MERSEN FUSE 600V 600A CLASS J TD FUSE AJT600
Reliable time-delay fuse with SmartSpot® indicator for 600A circuit protection at 600VAC or 500VDC, featuring high interrupting rating and compact Class J blade design.
£313.76
Why Choose the Mersen AJT600 Class J Time-Delay Fuse?
The Mersen AJT600 is a high-capacity Class J time-delay fuse designed to provide dependable overcurrent protection for demanding industrial electrical systems. Part of the established Mersen Amp-Trap 2000® AJT series, it combines time-delay performance with advanced current limitation, making it suitable for main circuits, feeders, motor circuits, transformers and heavy-duty distribution equipment.
The AJT600 is engineered to withstand normal temporary inrush currents produced during motor starting and transformer energisation while responding effectively to sustained overloads and short circuits. Its Class J construction requires approximately half the mounting space of comparable 600 V AC Class RK fuses, supporting more efficient switchboard and control-panel layouts.
With a rated current of 600 A and a voltage rating of 600 V AC / 400 V DC, the AJT600 is suited to high-current industrial installations where reliable fault interruption is essential. Its blade terminals and clip-or-bolted mounting configuration provide secure installation in compatible Class J fuse holders and fused switches.
Key Advantages
- High-capacity Class J time-delay fuse for demanding industrial protection.
- 600 A current rating for main, feeder and heavy-duty branch circuits.
- 600 V AC / 400 V DC voltage rating.
- Time-delay operation accommodates normal motor and transformer inrush currents.
- Current-limiting performance helps reduce damaging fault energy.
- Compact Class J footprint supports space-efficient equipment design.
Key Features
- Mersen Amp-Trap 2000® AJT series.
- 600 A rated current.
- 600 V AC / 400 V DC rated voltage.
- Class J time-delay operating characteristic.
- Blade-terminal construction.
- 200 kA AC interrupting rating.
- Clip or bolted mounting options.
- Brass terminal material.
- Advanced current-limiting protection.
- Supports IEC Type 2 No Damage protection.
- RoHS-compliant construction.
Reliable Protection for High-Current Industrial Systems
The Mersen AJT600 helps protect conductors, transformers, motors, switchgear and distribution equipment by interrupting dangerous overcurrents before excessive fault energy can cause serious damage. Its time-delay response permits normal temporary equipment-starting currents while maintaining reliable protection against sustained overloads and short-circuit conditions.
During a high-level fault, the fuse's current-limiting characteristics restrict peak current and let-through energy. This helps reduce thermal stress, mechanical forces and potential damage to downstream components, supporting improved system reliability and reduced downtime.
Typical Applications
- Main electrical distribution circuits.
- High-current feeder protection.
- Motor control centres.
- Large motor branch circuits.
- Industrial transformer protection.
- Switchboards and distribution panels.
- Heavy industrial machinery.
- Fused disconnect switches.
- Commercial and industrial power systems.
Technical Specifications
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| Fuse Indication | Visual indicator | |
|---|---|---|
| Current | 600 A | |
| Voltage | 600 V | |
| Fuse Type | UL class | |
| Fuse Class | Time delay | |
| Item number | AJT600 | |
| Description | Fuse AJT - Class J - Time-delay 600VAC 500VDC 600A Blade SmartSpot® Amp-Trap 2000® | |
| EAN/UPC Code | 782001962142 | |
| Rated voltage AC UL | 600 V | |
| Rated voltage DC UL | 500 V | |
| Frequency (Hz) | 50/60 Hz | |
| Ampere Rating | 600 A | |
| AC or DC | AC/DC | |
| Fuse Class | Class J | |
| Speed/Characteristic | Time Delay | |
| Mounting | Clip or Bolted | |
| AC Max I.R./Breaking Capacity | I1: 200 kA | |
| Indication System | Yes | |
| Indication System Type | SmartSpot® | |
| Connection/Terminal Material | Brass | |
| Connection/Terminal Type | Blade | |
| Product Diameter | 63.5 mm | |
| Product Length | 203.2 mm | |
| Sell Pack Quantity | 1 EA | |
| Sell Pack Weight | 1.4379 kg | |
| Sell Pack Width | 63.5 mm | |
| Sell Pack Length | 222.2 mm | |
| Sell Pack Height | 60.5 mm | |
| Product group | Low Voltage UL/CSA Fuses | |
| Body/Insulating Material | GMG | |
| Product Weight | 1.3698 kg | |
| HS Code | 85361090 | |
| Country of Manufacture | Mexico |
Frequently Asked Questions
What is the Mersen AJT600 used for?
The AJT600 protects high-current mains, feeders, motors, transformers, switchgear and industrial distribution circuits against sustained overloads and short-circuit faults.
What is the current rating of the AJT600?
The Mersen AJT600 has a rated current of 600 A.
What voltage is the AJT600 rated for?
The AJT600 is rated for operation at up to 600 V AC and 400 V DC.
Can the AJT600 withstand motor and transformer inrush currents?
Yes. Its time-delay characteristics allow normal temporary motor-starting and transformer-energisation currents while providing dependable protection against sustained overloads and short circuits.
What is the interrupting rating of the AJT600?
The AJT600 has an AC interrupting rating of 200 kA, making it suitable for installations with high available fault currents.
What type of terminals does the AJT600 use?
The AJT600 uses brass blade terminals and can be installed using compatible clip-mounted or bolted Class J equipment.
What are the dimensions of the Mersen AJT600?
The fuse measures approximately 203.2 mm in length and 63.5 mm in diameter.
Trusted for Industrial Circuit Protection
Mersen Amp-Trap 2000® AJT Class J fuses are widely selected by electrical engineers, panel builders and equipment manufacturers for dependable time-delay operation, high interrupting capacity and effective current limitation.
