Standard delivery
£8 ex VAT · free over £200UK parcel delivery is £8 ex VAT, or free on orders over £200 ex VAT.
Heavier items may be charged at a weight-based or pallet rate, shown at checkout.
MERSEN FUSE 600V 10A CLASS J FUSE A4J10
Fast-acting Class J fuse with Amp-Trap® construction rated for 600 V AC and 300 V DC, 10 A current capacity, designed for industrial and commercial circuit protection.
£15.98
Why Choose the Mersen A4J10 Class J Fast-Acting Fuse?
The Mersen A4J10 is a high-performance Class J fast-acting fuse engineered to provide reliable overcurrent and short-circuit protection for industrial and commercial electrical systems. As part of the trusted Mersen Amp-Trap® A4J series, it delivers superior current-limiting performance for feeder circuits, panelboards, switchboards, control equipment and general-purpose branch circuits.
Rated at 10 A, 600 V AC and 300 V DC, the A4J10 rapidly interrupts fault currents before they can reach their maximum value, helping to reduce thermal and mechanical stress on downstream equipment. Its unique Class J dimensions prevent substitution with lower-rated fuse classes, improving installation safety.
The fast-acting operating characteristic makes the A4J10 particularly suitable for circuits protecting sensitive electrical equipment where rapid fault clearance is required and prolonged overload tolerance is not necessary.
Key Advantages
- High-performance Class J fast-acting protection.
- 10 A current rating for industrial branch and feeder circuits.
- 600 V AC / 300 V DC voltage ratings.
- Current-limiting design reduces fault energy and peak let-through current.
- Fast fault interruption protects sensitive electrical equipment.
- Class J rejection dimensions help prevent incorrect fuse replacement.
Key Features
- Mersen Amp-Trap® A4J series.
- 10 A rated current.
- 600 V AC rated voltage.
- 300 V DC rated voltage.
- Class J current-limiting fuse.
- Fast-acting operating characteristic.
- Ferrule terminal construction.
- Suitable for 50 / 60 Hz electrical systems.
- Fibreglass body for dimensional stability.
- Easy-to-read identification marking.
- RoHS and REACH compliant.
Fast Current-Limiting Protection
The Mersen A4J10 is designed to interrupt severe short-circuit faults extremely quickly, reducing the current and energy transmitted to downstream equipment. Its current-limiting design helps minimise equipment damage, reduce downtime and improve overall electrical system protection.
Unlike time-delay fuses, the A4J10 responds rapidly to overcurrent conditions, making it well suited to sensitive electrical equipment, control circuits and general-purpose branch circuits where fast fault clearing is required.
Typical Applications
- Industrial control panels.
- Panelboards.
- Switchboards.
- Load centres.
- Bus duct systems.
- Feeder circuits.
- Lighting and heating circuits.
- General industrial electrical equipment.
- Branch-circuit protection.
Technical Specifications
Tick the specs you need, then view products that match.
| Current | 10 A | |
|---|---|---|
| Voltage | 600 V | |
| Fuse Type | UL class | |
| Fuse Class | Fast acting | |
| Item number | A4J10 | |
| Description | Fuse A4J - Class J - Fast-Acting 600VAC 300VDC 10A Ferrule Amp-Trap® | |
| EAN/UPC Code | 782001960131 | |
| Rated voltage AC UL | 600 V | |
| Rated voltage DC UL | 300 V | |
| Frequency (Hz) | 50/60 Hz | |
| Ampere Rating | 10 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 A4J10 used for?
The A4J10 provides fast-acting overcurrent and short-circuit protection for industrial control equipment, feeder circuits, panelboards, switchboards and general branch circuits.
What is the current rating of the A4J10?
The Mersen A4J10 has a rated current of 10 A.
What voltage ratings does the A4J10 support?
The fuse is rated for 600 V AC and 300 V DC.
Is the A4J10 a time-delay fuse?
No. The A4J10 is a fast-acting Class J fuse designed to clear fault currents rapidly without an intentional time delay.
Why choose a Class J fuse?
Class J fuses provide high current limitation, high interrupting capability and rejection-style dimensions that help prevent installation of incorrect fuse classes.
Trusted for Industrial Circuit Protection
Mersen Amp-Trap® Class J fast-acting fuses are widely specified by electrical engineers for protecting industrial power distribution systems, control equipment and sensitive electrical loads requiring rapid fault interruption.
