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MERSEN FUSE 300V 125A T FUSE A3T125
The A3T125 Class T fuse delivers rapid circuit protection for critical applications, engineered to interrupt overloads and short circuits swiftly at up to 300VAC or 160VDC. Its compact blade-type design ensures easy installation in space-constrained panels, supporting flexible integration into modern electrical systems.
£37.92
Why Choose the Mersen A3T125 Amp-Trap® Class T Fuse?
The Mersen A3T125 is a compact, fast-acting Class T current-limiting fuse designed to protect industrial and commercial electrical systems against damaging short circuits and overcurrent conditions. As part of the established Mersen Amp-Trap® A3T series, it combines rapid fault interruption with high current limitation to help safeguard conductors, switchgear and connected equipment.
The A3T125 delivers a high interrupting capacity within a relatively small physical format, making it suitable for installations where panel space is limited. Its unique Class T dimensions help prevent substitution with fuses offering lower voltage ratings or reduced current-limiting performance, while its glass melamine body provides excellent dimensional stability.
With a rated current of 125 A, a 300 V AC rating and a 160 V DC rating, the Mersen A3T125 is ideal for panelboards, switchboards, load centres, metering equipment and industrial power distribution systems requiring dependable high-speed circuit protection.
Key Advantages
- Fast-acting Class T current-limiting fuse for industrial circuit protection.
- 125 A rated current for power distribution applications.
- 300 V AC and 160 V DC voltage ratings.
- High current limitation helps reduce damaging peak fault currents.
- Compact dimensions support space-efficient electrical panel designs.
- Unique Class T construction helps prevent substitution with unsuitable fuse types.
Key Features
- Mersen Amp-Trap® A3T series.
- UL Class T fuse design.
- 125 A rated current.
- 300 V AC / 160 V DC rated voltage.
- Fast-acting, current-limiting operating characteristic.
- 200 kA AC interrupting rating.
- Glass melamine body for superior dimensional stability.
- Copper blade terminals with permanent catalogue identification.
Reliable Current-Limiting Circuit Protection
Current-limiting fuses such as the Mersen A3T125 interrupt severe fault currents before they reach their maximum prospective value. This helps reduce the thermal and mechanical forces placed on conductors, switchgear, busbars and connected equipment during a short circuit.
The compact Class T format combines excellent current limitation with a high interrupting capacity. This makes the A3T125 particularly suitable for power distribution systems where dependable fault clearance, equipment protection and efficient use of enclosure space are essential.
Typical Applications
- Industrial panelboards and distribution panels.
- Switchboards and electrical switchgear.
- Load centres and metering centres.
- Industrial machinery and control equipment.
- Power distribution assemblies.
- Commercial electrical installations.
- Power conversion and battery systems.
Technical Specifications
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| Current | 125 A | |
|---|---|---|
| Voltage | 300 V | |
| Fuse Type | UL class | |
| Fuse Class | Fast acting | |
| Item number | A3T125 | |
| Description | Fuse A3T - Class T - Fast-Acting 300VAC 160VDC 125A Blade Amp-Trap® | |
| EAN/UPC Code | 782001890209 | |
| Rated voltage AC UL | 300 V | |
| Rated voltage DC UL | 160 V | |
| Frequency (Hz) | 50/60 Hz | |
| Ampere Rating | 125 A | |
| AC or DC | AC/DC | |
| Fuse Class | Class T | |
| Speed/Characteristic | Fast-Acting | |
| Mounting | Bolted | |
| AC Max I.R./Breaking Capacity | I1: 200 kA | |
| Connection/Terminal Material | Copper | |
| Connection/Terminal Type | Blade | |
| Product Diameter | 26.9 mm | |
| Product Length | 62 mm | |
| Sell Pack Quantity | 1 EA | |
| Sell Pack Weight | 0.0771 kg | |
| Sell Pack Width | 28.7 mm | |
| Sell Pack Length | 28.7 mm | |
| Sell Pack Height | 65 mm | |
| Product group | Low Voltage UL/CSA Fuses | |
| Body/Insulating Material | GMG | |
| Product Weight | 0.073 kg | |
| HS Code | 85361090 | |
| Country of Manufacture | Mexico |
Frequently Asked Questions
What is the Mersen A3T125 used for?
The Mersen A3T125 protects industrial and commercial electrical systems against damaging short circuits and excessive overcurrent conditions.
What is the current rating of the Mersen A3T125?
The fuse has a rated current of 125 A.
What voltage is the A3T125 rated for?
The Mersen A3T125 is rated for electrical systems operating at up to 300 V AC or 160 V DC.
Is the Mersen A3T125 a fast-acting fuse?
Yes. The A3T125 is a fast-acting, current-limiting Class T fuse designed to interrupt damaging fault currents rapidly.
How is the Mersen A3T125 installed?
The fuse uses copper blade terminals and is bolted into a compatible Class T fuse holder or electrical distribution assembly.
Trusted by Electrical Professionals Worldwide
Mersen Amp-Trap® Class T fuses are widely specified by electrical engineers, panel builders and equipment manufacturers for compact, high-performance protection of critical industrial and commercial electrical systems.
