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MERSEN FUSE 600V 110A CLASS J FUSE A4J110
Fast-acting Class J fuse with blade terminals rated for 110A, 600VAC and 300VDC, designed for industrial circuit protection with high interrupting capacity.
Why Choose the Mersen A4J110 Class J Fast-Acting Fuse?
The Mersen A4J110 is a high-performance Class J fast-acting fuse designed to protect industrial and commercial electrical systems against damaging overloads and short-circuit currents. Part of the established Mersen Amp-Trap® A4J series, it provides compact, current-limiting protection for feeder circuits, switchboards, panelboards and other power distribution equipment.
Rated at 110 A, 600 V AC and 300 V DC, the A4J110 is engineered to interrupt severe fault currents rapidly. Its current-limiting construction reduces the peak current and clearing energy reaching downstream conductors, switchgear and connected equipment.
The fuse has a fast-acting operating characteristic without an intentional time delay. This makes it particularly suitable for circuits where rapid fault clearance is required and the connected load does not produce prolonged start-up or inrush currents.
Key Advantages
- Dependable Class J fast-acting circuit protection.
- 110 A current rating for industrial feeder and branch circuits.
- 600 V AC and 300 V DC ratings.
- Current-limiting design reduces short-circuit let-through current and energy.
- Rapid operation helps protect sensitive downstream equipment.
- Class J rejection dimensions help prevent installation of an unsuitable fuse class.
- Compact design supports efficient use of panel and switchgear space.
Key Features
- Mersen Amp-Trap® A4J series.
- 110 A rated current.
- 600 V AC rated voltage.
- 300 V DC rated voltage.
- Class J current-limiting fuse.
- Fast-acting operating characteristic.
- 200 kA AC interrupting rating.
- 100 kA DC interrupting rating.
- Knife-blade terminal construction.
- Rejection-style Class J dimensions.
- Suitable for 50/60 Hz electrical systems.
- Designed for industrial and commercial power distribution.
Fast Current-Limiting Protection
During a severe short-circuit event, the Mersen A4J110 can interrupt the circuit before the prospective fault current reaches its maximum peak. This limits the electrical energy passed through the circuit and helps reduce thermal and mechanical stress on conductors, busbars, switches and other downstream components.
Because the A4J110 is fast acting, it should be selected for circuits that require rapid fault interruption rather than intentional tolerance of sustained inrush currents. Applications involving large motors, transformers or other high-inrush equipment may require a suitably rated time-delay fuse instead.
Typical Applications
- Industrial feeder circuits.
- Switchboards and distribution boards.
- Panelboards and load centres.
- Bus duct systems.
- Industrial control panels.
- Lighting and heating circuits.
- Capacitor circuit protection.
- Circuit-breaker back-up protection.
- General industrial electrical equipment.
- Commercial power distribution systems.
Technical Specifications
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| Current | 110 A | |
|---|---|---|
| Voltage | 600 V | |
| Fuse Type | UL class | |
| Fuse Class | Fast acting | |
| Item number | A4J110 | |
| Description | Fuse A4J - Class J - Fast-Acting 600VAC 300VDC 110A Blade Amp-Trap® | |
| EAN/UPC Code | 782001960339 | |
| Rated voltage AC UL | 600 V | |
| Rated voltage DC UL | 300 V | |
| Frequency (Hz) | 50/60 Hz | |
| Ampere Rating | 110 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 | 41.3 mm | |
| Product Length | 146 mm | |
| Sell Pack Quantity | 1 EA | |
| Sell Pack Weight | 0.3583 kg | |
| Sell Pack Width | 42.9 mm | |
| Sell Pack Length | 42.9 mm | |
| Sell Pack Height | 152.4 mm | |
| Product group | Low Voltage UL/CSA Fuses | |
| Body/Insulating Material | GMG | |
| Product Weight | 0.342 kg | |
| HS Code | 85361090 | |
| Country of Manufacture | Mexico |
Frequently Asked Questions
What is the Mersen A4J110 used for?
The A4J110 provides fast-acting overcurrent and short-circuit protection for feeder circuits, switchboards, panelboards, control equipment and general industrial power distribution systems.
What is the current rating of the A4J110?
The Mersen A4J110 has a rated current of 110 A.
What voltage ratings does the A4J110 support?
The fuse is rated for use at up to 600 V AC and 300 V DC.
What is the interrupting rating of the A4J110?
The A4J110 has an interrupting rating of 200 kA AC and 100 kA DC.
Is the A4J110 a time-delay fuse?
No. The A4J110 is a fast-acting Class J fuse without an intentional time delay.
What does current limiting mean?
Current limiting means the fuse can clear a severe fault before the prospective short-circuit current reaches its full peak, reducing the energy transmitted to downstream electrical equipment.
Can the A4J110 replace a different fuse class?
A replacement fuse must match the required Class J designation, current rating, voltage rating and operating characteristic. The equipment manufacturer’s specifications and applicable electrical regulations should always be checked before replacement.
Trusted for Industrial Circuit Protection
Mersen Amp-Trap® Class J fast-acting fuses provide compact, high-interrupting-capacity protection for demanding electrical systems where rapid fault clearance and effective current limitation are required.
