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MERSEN FUSE 600V 12A CLASS J TD FUSE AJT12
The AJT12 Amp-Trap 2000® fuse provides superior current-limiting protection and precise time-delay performance, ideal for safeguarding motors, transformers, and sensitive equipment. Its compact Class J ferrule design ensures straightforward integration into industrial panels where space efficiency is critical.
£14.96
Why Choose the Mersen AJT12 Class J Time-Delay Fuse?
The Mersen AJT12 is a high-performance Class J time-delay fuse designed to provide dependable overcurrent protection for industrial and commercial electrical systems. As part of the established Amp-Trap 2000® AJT series, it combines current-limiting protection with time-delay characteristics that allow temporary motor-starting and transformer inrush currents without unnecessary fuse operation.
Engineered for branch circuit protection, the AJT12 helps protect motors, transformers, control equipment and distribution circuits against damaging overloads and short circuits. Its compact Class J format supports space-efficient panel designs, while its high interrupting capacity provides reliable performance in demanding fault conditions.
With a rated current of 12 A and voltage ratings of up to 600 V AC and 500 V DC, the AJT12 is suitable for industrial control panels, motor circuits, HVAC equipment, transformers and OEM machinery. Its ferrule-style construction allows straightforward installation in compatible Class J fuse holders.
Key Advantages
- Compact Class J time-delay fuse for branch circuit protection.
- 12 A current rating for industrial control and power applications.
- 600 V AC and 500 V DC voltage ratings.
- Time-delay performance accommodates temporary motor and transformer inrush currents.
- Current-limiting design helps reduce damage to downstream electrical equipment.
- Compact dimensions support efficient use of control panel space.
Key Features
- Mersen Amp-Trap 2000® AJT series.
- 12 A current rating.
- 600 V AC / 500 V DC rated voltage.
- Class J time-delay fuse.
- Ferrule-style mounting configuration.
- Current-limiting construction.
- Visual open-fuse indication for easier maintenance.
- Suitable for motors, transformers, feeders and branch circuits.
Reliable Protection for Industrial Electrical Systems
The Mersen AJT series is designed to respond quickly to severe short circuits while tolerating the temporary inrush currents commonly produced by motors, transformers and other inductive loads. This combination helps prevent nuisance fuse operation while maintaining effective protection against sustained overloads and high fault currents.
Its current-limiting performance helps reduce the thermal and mechanical energy passed to downstream components during a fault. This can minimise equipment damage, improve electrical safety and reduce costly production downtime in industrial installations.
Typical Applications
- Industrial control panels.
- Motor branch circuits and motor control centres.
- Transformer primary and secondary protection.
- HVAC and refrigeration equipment.
- OEM machinery and automation systems.
- Power distribution panels and electrical feeders.
Technical Specifications
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| Current | 12 A | |
|---|---|---|
| Voltage | 600 V | |
| Fuse Type | UL class | |
| Fuse Class | Time delay | |
| Item number | AJT12N | |
| Description | Fuse AJT - Class J - Time-delay 600VAC 500VDC 12A Ferrule Amp-Trap 2000® | |
| EAN/UPC Code | 782001497682 | |
| Rated voltage AC UL | 600 V | |
| Rated voltage DC UL | 500 V | |
| Frequency (Hz) | 50/60 Hz | |
| Ampere Rating | 12 A | |
| AC or DC | AC/DC | |
| Fuse Class | Class J | |
| Speed/Characteristic | Time Delay | |
| 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 | 111.3 mm | |
| Sell Pack Height | 42.9 mm | |
| Product group | Low Voltage UL/CSA Fuses | |
| Body/Insulating Material | GMG | |
| Product Weight | 0.044 kg | |
| HS Code | 85361050 | |
| Country of Manufacture | Mexico |
Frequently Asked Questions
What is the Mersen AJT12 used for?
The AJT12 protects industrial branch circuits, motors, transformers, control panels and distribution equipment against overloads and short circuits.
What is the current rating of the AJT12?
The Mersen AJT12 has a rated current of 12 A.
What voltage is the AJT12 rated for?
The fuse is rated for applications up to 600 V AC and 500 V DC.
Why does the AJT12 have a time delay?
The time-delay characteristic allows temporary inrush currents from motors and transformers without unnecessary fuse operation, while still protecting against sustained overloads.
Where is the AJT12 typically installed?
It is commonly installed in compatible Class J fuse holders within industrial control panels, motor control centres, machinery and electrical distribution systems.
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 reliable current limitation, dependable circuit protection and space-efficient installation.
