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 350A CLASS J TD FUSE AJT350
The AJT350 Class J time-delay fuse provides reliable circuit protection for industrial applications up to 600VAC and 500VDC at 350A, featuring a blade terminal and high breaking capacity.
£210.87
Why Choose the Mersen AJT350 Class J Time-Delay Fuse?
The Mersen AJT350 is a premium Class J time-delay fuse designed to provide reliable overcurrent protection for demanding industrial electrical systems. As part of the proven Mersen Amp-Trap 2000® AJT series, it combines exceptional current-limiting performance with time-delay characteristics, making it ideal for protecting main circuits, feeders, motor branch circuits and industrial machinery operating under high fault current conditions.
Engineered with advanced fuse technology, the AJT350 withstands temporary motor starting and transformer inrush currents while providing rapid protection against sustained overloads and short circuits. Its compact Class J design requires significantly less mounting space than comparable Class RK fuses, allowing more efficient control panel layouts without compromising protection.
With a rated current of 350 A and a 600 V AC / 400 V DC rating, the AJT350 is ideally suited for industrial power distribution, motor protection and OEM machinery. Its blade construction enables secure installation into compatible Class J fuse holders, clips and fused disconnect switches.
Key Advantages
- High-capacity Class J time-delay fuse for industrial circuit protection.
- 350 A current rating for high-power applications.
- 600 V AC / 400 V DC voltage rating.
- Time-delay characteristics accommodate motor and transformer inrush currents.
- Current-limiting technology helps reduce equipment damage during fault conditions.
- Compact Class J footprint saves valuable panel space.
Key Features
- Mersen Amp-Trap 2000® AJT series.
- 350 A ampere rating.
- 600 V AC / 400 V DC rated voltage.
- Class J time-delay fuse construction.
- Blade terminal design.
- 200 kA AC interrupting rating.
- SmartSpot® visual open fuse indication available.
- Supports IEC Type 2 No Damage protection.
Reliable Protection for High-Current Industrial Systems
The Mersen AJT350 is engineered to interrupt dangerous overload and short-circuit currents before they can damage motors, transformers, switchgear and other valuable electrical equipment. Its time-delay performance allows normal temporary inrush currents to pass without unnecessary fuse replacement, improving system availability.
The fuse's high interrupting capacity and current-limiting performance make it ideal for industrial facilities, OEM machinery and power distribution systems where dependable protection and maximum uptime are essential.
Typical Applications
- Main and feeder circuit protection.
- High-current motor branch circuits.
- Industrial transformer protection.
- Power distribution panels.
- OEM machinery and automation systems.
- Industrial switchboards and fused disconnect switches.
Technical Specifications
Tick the specs you need, then view products that match.
| Current | 350 A | |
|---|---|---|
| Voltage | 600 V | |
| Fuse Type | UL class | |
| Fuse Class | Time delay | |
| Item number | AJT350/600 | |
| Description | Reducer Fuse AJT - Class J - Time-delay 600VAC 500VDC 350A Blade | |
| EAN/UPC Code | 782001463908 | |
| Rated voltage AC UL | 600 V | |
| Rated voltage DC UL | 500 V | |
| Frequency (Hz) | 50/60 Hz | |
| Ampere Rating | 350 A | |
| AC or DC | AC/DC | |
| Fuse Class | Class J | |
| Speed/Characteristic | Time Delay | |
| Mounting | Clip or Bolted | |
| AC Max I.R./Breaking Capacity | I1: 200 kA | |
| Connection/Terminal Material | Brass | |
| Connection/Terminal Type | Blade | |
| Product Diameter | 63.5 mm | |
| Product Length | 203.2 mm | |
| Sell Pack Quantity | 1 EA | |
| Sell Pack Weight | 1.5467 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 | 1.4742 kg | |
| HS Code | 85361090 | |
| Country of Manufacture | Mexico |
Frequently Asked Questions
What is the Mersen AJT350 used for?
The AJT350 protects high-current industrial main, feeder and branch circuits against overloads and short-circuit faults.
What is the current rating of the AJT350?
The fuse has a rated current of 350 A.
What voltage is the AJT350 rated for?
The AJT350 operates at up to 600 V AC and 400 V DC.
Can the AJT350 withstand motor starting currents?
Yes. Its time-delay characteristics allow temporary motor starting and transformer inrush currents while maintaining reliable protection against sustained overloads and faults.
Where is the AJT350 typically installed?
It is commonly installed in industrial switchboards, control panels, machinery and power distribution equipment using compatible Class J fuse holders or fused disconnect switches.
Trusted for Industrial Circuit Protection
Mersen Amp-Trap 2000® AJT Class J fuses are trusted worldwide by electrical engineers, OEM manufacturers and panel builders for dependable overcurrent protection, excellent current limitation and long-term industrial reliability.
