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MERSEN FUSE 600V 175A CLASS J TD FUSE AJT175
The AJT175 fuse delivers reliable circuit protection in demanding industrial environments, combining a time-delay design with a high interrupting rating to safeguard against overloads and short circuits. Its SmartSpot® visual indicator enables quick identification of blown fuses, streamlining maintenance and minimising downtime.
£102.26
Why Choose the Mersen AJT175 Class J Time-Delay Fuse?
The Mersen AJT175 is a high-performance Class J time-delay fuse designed to provide dependable overcurrent protection for demanding industrial and commercial electrical systems. As part of the established Amp-Trap 2000® AJT series, it combines advanced current-limiting performance with time-delay characteristics that accommodate temporary motor-starting and transformer inrush currents.
Engineered for heavy-duty branch circuit and feeder protection, the AJT175 helps safeguard motors, transformers, switchgear, distribution equipment and industrial machinery against damaging overloads and short circuits. Its compact Class J construction supports space-efficient panel designs while providing a high interrupting capacity for reliable operation under severe fault conditions.
With a rated current of 175 A and voltage ratings of up to 600 V AC and 400 V DC, the AJT175 is suitable for motor control centres, power distribution panels, switchboards and OEM machinery. Its blade-style terminals provide secure installation in compatible Class J fuse holders and fused disconnect devices.
Key Advantages
- Heavy-duty Class J time-delay fuse for industrial circuit protection.
- 175 A current rating for feeders, motors and distribution systems.
- 600 V AC and 400 V DC voltage ratings.
- Time-delay performance accommodates temporary motor and transformer inrush currents.
- Current-limiting construction helps minimise damage to downstream electrical equipment.
- Compact Class J format reduces control panel space requirements.
Key Features
- Mersen Amp-Trap 2000® AJT series.
- 175 A current rating.
- 600 V AC / 400 V DC rated voltage.
- Class J time-delay fuse.
- Blade-style terminal configuration.
- Advanced current-limiting design.
- SmartSpot® visual open-fuse indication.
- Suitable for branch circuits, feeders, motors and transformers.
Reliable Protection for Industrial Electrical Systems
The Mersen AJT series is engineered to tolerate temporary inrush currents generated by motors, transformers and other inductive loads while responding effectively to sustained overloads and short circuits. This performance helps prevent nuisance fuse operation while maintaining dependable protection for valuable electrical equipment.
The AJT175 limits the fault energy passed to downstream conductors and components, helping reduce thermal and mechanical stress during short-circuit conditions. This can improve electrical safety, minimise equipment damage and reduce costly disruption in industrial installations.
Typical Applications
- Industrial motor control centres.
- Electrical feeders and branch circuits.
- Transformer protection.
- Power distribution panels and switchboards.
- HVAC and refrigeration systems.
- OEM machinery and industrial automation equipment.
Technical Specifications
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| Fuse Indication | Visual indicator | |
|---|---|---|
| Current | 175 A | |
| Voltage | 600 V | |
| Fuse Type | UL class | |
| Fuse Class | Time delay | |
| Item number | AJT175 | |
| Description | Fuse AJT - Class J - Time-delay 600VAC 500VDC 175A Blade SmartSpot® Amp-Trap 2000® | |
| EAN/UPC Code | 782001962579 | |
| Rated voltage AC UL | 600 V | |
| Rated voltage DC UL | 500 V | |
| Frequency (Hz) | 50/60 Hz | |
| Ampere Rating | 175 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 | |
| Indication System | Yes | |
| Indication System Type | SmartSpot® | |
| Connection/Terminal Material | Brass | |
| Connection/Terminal Type | Blade | |
| Product Diameter | 41.3 mm | |
| Product Length | 146 mm | |
| Sell Pack Quantity | 1 EA | |
| Sell Pack Weight | 0.3629 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 | 0.3465 kg | |
| HS Code | 85361090 | |
| Country of Manufacture | Mexico |
Frequently Asked Questions
What is the Mersen AJT175 used for?
The AJT175 protects industrial branch circuits, feeders, motors, transformers and power distribution equipment against overloads and short circuits.
What is the current rating of the AJT175?
The Mersen AJT175 has a rated current of 175 A.
What voltage is the AJT175 rated for?
The fuse is rated for applications up to 600 V AC and 400 V DC.
Why does the AJT175 have a time delay?
The time-delay characteristic allows temporary starting and inrush currents from motors and transformers without unnecessary fuse operation while maintaining protection against sustained overloads.
Does the AJT175 include a blown-fuse indicator?
Yes. The AJT175 incorporates a SmartSpot® visual open-fuse indicator to support faster maintenance and fault identification.
Trusted by Electrical Professionals Worldwide
Mersen Amp-Trap 2000® Class J fuses are widely specified by electrical engineers, panel builders and industrial maintenance professionals for dependable current limitation, compact installation and reliable overcurrent protection.
