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MERSEN FUSE 600V 500A CLASS J FUSE A4J500
The A4J500 Class J fast-acting fuse provides reliable short-circuit protection in industrial applications with a 500A rating, 600VAC and 300VDC voltage ratings, and a 200 kA interrupting capacity.
£256.82
Why Choose the Mersen A4J500 Amp-Trap Fuse?
The Mersen A4J500 is a heavy-duty Class J fast-acting current-limiting fuse engineered to provide exceptional protection against overloads and short circuits in industrial and commercial power distribution systems. As part of the proven Mersen Amp-Trap A4J series, it delivers rapid fault interruption, outstanding current limitation and dependable protection for high-current electrical installations.
Designed for demanding industrial environments, the A4J500 significantly reduces peak fault current and let-through energy, helping to minimise thermal and mechanical stress on downstream equipment such as switchboards, bus duct systems, feeders and industrial machinery. Its unique Class J dimensions prevent substitution with other fuse classes that offer lower voltage ratings or interrupting capacities.
With a rated current of 500 A, a 600 V AC rating and a 300 V DC rating, the Mersen A4J500 is ideally suited to high-current feeder protection and industrial power distribution systems requiring fast-acting overcurrent protection.
Key Advantages
- Fast-acting Class J fuse for industrial circuit protection.
- 500 A current rating for high-current feeders and power distribution equipment.
- 600 V AC and 300 V DC voltage ratings.
- Current-limiting design helps reduce damaging fault energy.
- 200 kA AC interrupting rating and 100 kA DC interrupting rating.
- Class J rejection dimensions prevent incorrect fuse replacement.
Key Features
- Mersen Amp-Trap A4J series.
- 500 A rated current.
- 600 V AC voltage rating.
- 300 V DC voltage rating.
- Fast-acting current-limiting protection.
- Blade terminal construction.
- Fibreglass body provides excellent dimensional stability.
- Compatible with Class J fuse holders.
Reliable Protection for High-Current Electrical Systems
The Mersen A4J500 interrupts fault currents within milliseconds, limiting peak current and total let-through energy before damaging levels can be reached. This helps protect transformers, switchgear, busbars, cables and industrial equipment from the destructive effects of high fault currents while improving overall system reliability.
The Amp-Trap A4J range is widely specified in industrial facilities, manufacturing plants and commercial power distribution systems where dependable current limitation and high interrupting capacity are essential. Typical applications include panelboards, switchboards, bus duct systems, feeder circuits and general industrial loads.
Typical Applications
- Industrial feeder circuits.
- Switchboards and panelboards.
- Bus duct systems.
- Load centres.
- Industrial machinery.
- General power distribution equipment.
Technical Specifications
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| Current | 500 A | |
|---|---|---|
| Voltage | 600 V | |
| Fuse Type | UL class | |
| Fuse Class | Fast acting | |
| Item number | A4J500 | |
| Description | Fuse A4J - Class J - Fast-Acting 600VAC 300VDC 500A Blade Amp-Trap® | |
| EAN/UPC Code | 782001960490 | |
| Rated voltage AC UL | 600 V | |
| Rated voltage DC UL | 300 V | |
| Frequency (Hz) | 50/60 Hz | |
| Ampere Rating | 500 A | |
| AC or DC | AC/DC | |
| Fuse Class | Class J | |
| Speed/Characteristic | Fast-Acting | |
| Mounting | Clip | |
| AC Max I.R./Breaking Capacity | I1: 200 kA | |
| Connection/Terminal Material | Brass Alloy | |
| 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 A4J500 used for?
The Mersen A4J500 provides fast-acting overcurrent and short-circuit protection for high-current industrial feeders, switchboards, bus duct systems and power distribution equipment.
What is the current rating of the A4J500?
The fuse has a 500 A current rating.
What voltage is the Mersen A4J500 rated for?
The A4J500 is rated for operation at up to 600 V AC and 300 V DC.
Is the A4J500 a fast-acting fuse?
Yes. The A4J500 is a fast-acting Class J current-limiting fuse designed to interrupt overloads and short-circuit faults extremely quickly.
Where is the A4J500 typically installed?
It is commonly installed in compatible Class J fuse holders within industrial switchboards, bus duct systems, load centres and high-current electrical distribution equipment.
Trusted by Electrical Professionals Worldwide
Mersen Amp-Trap Class J fuses are trusted by electrical engineers, OEMs and maintenance professionals for delivering dependable overcurrent protection, exceptional current limitation and reliable performance in demanding industrial environments.
