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MERSEN FUSE 600V 3A CLASS J FUSE A4J3
The Fuse A4J offers superior short-circuit protection with fast-acting response characteristics and a robust 600VAC, 300VDC, 3A rating. Its compact ferrule design ensures easy integration into demanding control panels and distribution systems.
£18.17
Why Choose the Mersen A4J3 Amp-Trap Fuse?
The Mersen A4J3 is a compact and dependable Class J fast-acting current-limiting fuse designed to protect industrial and commercial electrical circuits against overloads and short circuits. As part of the established Mersen Amp-Trap A4J series, it provides rapid fault interruption and reliable protection for branch circuits, control panels and sensitive electrical equipment.
The A4J3 limits the peak current and let-through energy reaching downstream components during a fault. This helps reduce thermal and mechanical stress on conductors, switches, contactors and other electrical devices, improving system safety and helping minimise equipment damage and unplanned downtime.
With a rated current of 3 A, a 600 V AC rating and a 300 V DC rating, the Mersen A4J3 is suitable for low-current industrial circuits requiring high interrupting capacity. Its compact Class J dimensions also help prevent substitution with fuses that have unsuitable voltage, interrupting or current-limiting ratings.
Key Advantages
- Fast-acting Class J fuse for industrial circuit protection.
- 3 A current rating for low-current branch circuits and equipment.
- 600 V AC and 300 V DC ratings for AC and DC applications.
- Current-limiting performance helps reduce damaging fault energy.
- 200 kA AC interrupting capacity for high-fault-current systems.
- Class J rejection dimensions help prevent unsuitable fuse substitution.
Key Features
- Mersen Amp-Trap A4J series.
- 3 A rated current.
- 600 V AC voltage rating.
- 300 V DC voltage rating.
- Fast-acting current-limiting operation.
- Ferrule-style terminals for secure installation.
- Compact cylindrical cartridge construction.
- Compatible with correctly rated Class J fuse holders.
Reliable Protection for Low-Current Industrial Circuits
Current-limiting fuses such as the Mersen A4J3 interrupt high fault currents before they can reach their maximum prospective level. By restricting peak current and total let-through energy, the fuse helps protect downstream equipment from excessive heat, electromagnetic forces and other damaging effects associated with short-circuit conditions.
The A4J series is designed for installations requiring fast fault response, high interrupting capacity and compact dimensions. Its Class J construction makes the A4J3 suitable for modern control panels and electrical distribution systems where reliable protection and efficient use of enclosure space are essential.
Typical Applications
- Industrial electrical control panels.
- Low-current branch circuits.
- Lighting and heating circuits.
- Power distribution equipment.
- Instrumentation and control equipment.
- Machinery and general industrial loads.
Technical Specifications
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| Current | 3 A | |
|---|---|---|
| Voltage | 600 V | |
| Fuse Type | UL class | |
| Fuse Class | Fast acting | |
| Item number | A4J3 | |
| Description | Fuse A4J - Class J - Fast-Acting 600VAC 300VDC 3A Ferrule Amp-Trap® | |
| EAN/UPC Code | 782001960063 | |
| Rated voltage AC UL | 600 V | |
| Rated voltage DC UL | 300 V | |
| Frequency (Hz) | 50/60 Hz | |
| Ampere Rating | 3 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 | Tin-Plated Copper | |
| Connection/Terminal Type | Ferrule | |
| Product Diameter | 20.7 mm | |
| Product Length | 57.2 mm | |
| Sell Pack Quantity | 10 EA | |
| Sell Pack Weight | 0.4627 kg | |
| Sell Pack Width | 60.5 mm | |
| Sell Pack Length | 108 mm | |
| Sell Pack Height | 42.9 mm | |
| Product group | Low Voltage UL/CSA Fuses | |
| Body/Insulating Material | PolyTube | |
| Product Weight | 0.044 kg | |
| HS Code | 85361010 | |
| Country of Manufacture | Mexico |
Frequently Asked Questions
What is the Mersen A4J3 used for?
The Mersen A4J3 provides fast-acting overcurrent and short-circuit protection for low-current branch circuits, control panels and industrial electrical equipment.
What is the current rating of the A4J3 fuse?
The A4J3 has a rated current of 3 A.
What voltage is the Mersen A4J3 rated for?
The fuse is rated for operation at up to 600 V AC and 300 V DC.
Is the A4J3 a time-delay fuse?
No. The A4J3 is a fast-acting Class J fuse designed to interrupt overcurrents and short-circuit faults rapidly.
What fuse holder is required for the A4J3?
The A4J3 should be installed in a compatible Class J fuse holder rated for a 3 A fuse and the applicable system voltage.
Trusted Industrial Circuit Protection
Mersen Amp-Trap Class J fuses are widely specified by electrical engineers, panel builders and maintenance professionals for dependable current limitation and high-performance protection in industrial electrical systems.
