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MERSEN FUSE 600V 30A CLASS J FUSE A4J30
Fast-acting Class J blade-type fuse rated for 300A, 600V AC and 300V DC with a 200 kA interrupting rating, designed for industrial circuit protection.
£14.80
Why Choose the Mersen A4J30 Amp-Trap Fuse?
The Mersen A4J30 is a premium Class J fast-acting current-limiting fuse engineered to provide superior overcurrent and short-circuit protection for industrial and commercial electrical systems. As part of the proven Mersen Amp-Trap A4J series, it delivers rapid fault interruption, helping to protect valuable electrical equipment while reducing downtime and maintenance costs.
Designed for demanding industrial applications, the A4J30 combines excellent current-limiting performance with a compact Class J footprint. Its unique rejection dimensions prevent substitution with lower-rated fuse classes, helping maintain system integrity and electrical safety in modern power distribution systems.
With a rated current of 30 A, a 600 V AC rating and a 300 V DC rating, the Mersen A4J30 is ideal for protecting feeders, branch circuits, panelboards, switchboards and general-purpose industrial loads requiring dependable fast-acting protection.
Key Advantages
- Fast-acting Class J fuse for industrial circuit protection.
- 30 A current rating for branch circuits and electrical equipment.
- 600 V AC and 300 V DC voltage ratings.
- High current-limiting design reduces damaging fault energy.
- 200 kA AC interrupting capacity for demanding installations.
- Class J rejection dimensions prevent incorrect fuse replacement.
Key Features
- Mersen Amp-Trap A4J series.
- 30 A rated current.
- 600 V AC voltage rating.
- 300 V DC voltage rating.
- Fast-acting current-limiting protection.
- Ferrule terminal construction.
- Fibreglass body for excellent dimensional stability.
- Compatible with Class J fuse holders.
Reliable Protection for Industrial Electrical Systems
Current-limiting fuses such as the Mersen A4J30 interrupt fault currents extremely quickly, significantly reducing peak let-through current and thermal energy. This protects downstream electrical equipment from damage while helping maintain system reliability and minimise costly downtime.
The Amp-Trap A4J series is widely specified for industrial control panels, switchboards, feeder circuits, load centres and general-purpose electrical distribution systems where dependable protection and high interrupting capacity are essential.
Typical Applications
- Industrial control panels.
- Panelboards and switchboards.
- Load centres.
- Feeder and branch circuit protection.
- Lighting and heating circuits.
- General industrial machinery.
Technical Specifications
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| Current | 30 A | |
|---|---|---|
| Voltage | 600 V | |
| Fuse Type | UL class | |
| Fuse Class | Fast acting | |
| Item number | A4J300 | |
| Description | Fuse A4J - Class J - Fast-Acting 600VAC 300VDC 300A Blade Amp-Trap® | |
| EAN/UPC Code | 782001960414 | |
| Rated voltage AC UL | 600 V | |
| Rated voltage DC UL | 300 V | |
| Frequency (Hz) | 50/60 Hz | |
| Ampere Rating | 300 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 | 54 mm | |
| Product Length | 181.1 mm | |
| Sell Pack Quantity | 1 EA | |
| Sell Pack Weight | 0.8346 kg | |
| Sell Pack Width | 53.8 mm | |
| Sell Pack Length | 53.8 mm | |
| Sell Pack Height | 184.1 mm | |
| Product group | Low Voltage UL/CSA Fuses | |
| Body/Insulating Material | GMG | |
| Product Weight | 0.7938 kg | |
| HS Code | 85361050 | |
| Country of Manufacture | Mexico |
Frequently Asked Questions
What is the Mersen A4J30 used for?
The Mersen A4J30 provides fast-acting overcurrent and short-circuit protection for industrial power distribution systems, feeders, branch circuits and electrical equipment.
What is the current rating of the A4J30?
The fuse has a 30 A current rating.
What voltage is the Mersen A4J30 rated for?
The A4J30 is rated for operation at up to 600 V AC and 300 V DC.
Is the A4J30 a fast-acting fuse?
Yes. The A4J30 is a fast-acting Class J current-limiting fuse designed to interrupt overloads and short-circuit faults rapidly.
Where is the A4J30 typically installed?
It is commonly installed in Class J fuse holders within industrial control panels, switchboards, load centres and power distribution equipment.
Trusted by Electrical Professionals Worldwide
Mersen Amp-Trap Class J fuses are trusted by electrical engineers, OEMs and maintenance professionals for dependable circuit protection, exceptional current limitation and reliable performance in demanding industrial applications.
