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MERSEN FUSE 300V 300A T FUSE A3T300
The A3T300 Class T fuse delivers rapid circuit protection for demanding applications up to 300A, with a fast-acting response to minimise equipment damage in fault conditions. It supports high interrupting ratings at both 300VAC and 160VDC, ensuring reliable safeguarding for power distribution panels and industrial systems.
£84.07
Why Choose the Mersen A3T300 Class T Fuse?
The Mersen A3T300 is a compact and highly dependable Class T fast-acting fuse designed to protect industrial and commercial electrical systems against damaging overcurrents and short-circuit faults. As part of the established Mersen Amp-Trap® A3T fuse series, it provides exceptional current-limiting performance for demanding power distribution applications.
This fuse responds rapidly to high fault currents, helping reduce the thermal and mechanical energy transferred to conductors, switchgear and connected equipment. Its compact Class T format also enables effective circuit protection where installation space is limited, while its distinctive dimensions help prevent replacement with unsuitable fuse classes.
With a rated current of 300 A and a voltage rating of 300 V AC, the Mersen A3T300 is suitable for high-current feeders, distribution panels, switchboards and industrial machinery. Its blade-terminal construction provides a secure connection when installed in a correctly rated Class T fuse holder.
Key Advantages
- Compact Class T fast-acting fuse for industrial applications.
- 300 A current rating suitable for high-current circuits.
- 300 V AC voltage rating for commercial and industrial systems.
- Highly current-limiting performance helps minimise equipment damage.
- Fast fault interruption reduces thermal and mechanical stress.
- Compact construction saves space inside electrical panels.
Key Features
- Mersen Amp-Trap® A3T Class T fuse series.
- 300 A rated current.
- 300 V AC rated voltage.
- Fast-acting overcurrent protection.
- High interrupting capacity for severe fault conditions.
- Current-limiting design for improved equipment protection.
- Blade-terminal construction.
- Compact format for use in compatible Class T fuse holders.
Reliable High-Current Circuit Protection
Fast-acting Class T fuses such as the Mersen A3T300 interrupt excessive current before it can reach its full prospective fault level. This current-limiting action helps protect electrical equipment, conductors and distribution components from the severe effects of short circuits.
The A3T series combines a high interrupting rating with compact dimensions, making it suitable for installations requiring substantial protection without occupying excessive panel space. Its rapid operating characteristic supports reliable protection for feeders, switchgear and industrial electrical equipment.
Typical Applications
- Industrial switchboards and panelboards.
- Power distribution equipment.
- High-current feeder circuits.
- Motor control centres.
- Industrial machinery and production equipment.
- Commercial electrical installations.
Technical Specifications
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| Current | 300 A | |
|---|---|---|
| Voltage | 300 V | |
| Fuse Type | UL class | |
| Fuse Class | Fast acting | |
| Item number | A3T300 | |
| Description | Fuse A3T - Class T - Fast-Acting 300VAC 160VDC 300A Blade Amp-Trap® | |
| EAN/UPC Code | 782001890261 | |
| Rated voltage AC UL | 300 V | |
| Rated voltage DC UL | 160 V | |
| Frequency (Hz) | 50/60 Hz | |
| Ampere Rating | 300 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 | 33.8 mm | |
| Product Length | 69.8 mm | |
| Sell Pack Quantity | 1 EA | |
| Sell Pack Weight | 0.1315 kg | |
| Sell Pack Width | 35.1 mm | |
| Sell Pack Length | 35.1 mm | |
| Sell Pack Height | 73.2 mm | |
| Product group | Low Voltage UL/CSA Fuses | |
| Body/Insulating Material | GMG | |
| Product Weight | 0.1234 kg | |
| HS Code | 85361090 | |
| Country of Manufacture | Mexico |
Frequently Asked Questions
What is the Mersen A3T300 used for?
The Mersen A3T300 is used to protect high-current industrial and commercial electrical circuits against overcurrents and short-circuit faults.
What is the current rating of the A3T300?
The fuse has a rated current of 300 A.
What voltage is the Mersen A3T300 rated for?
The A3T300 is rated for electrical systems operating at up to 300 V AC.
Is the Mersen A3T300 a fast-acting fuse?
Yes. The A3T300 is a fast-acting Class T fuse designed to interrupt damaging fault currents rapidly.
Where is the A3T300 typically installed?
The fuse is commonly installed in switchboards, distribution panels, motor control centres and industrial equipment using a compatible Class T fuse holder.
Trusted for Industrial Circuit Protection
Mersen Amp-Trap® Class T fuses are widely used by electrical engineers, panel builders and industrial maintenance professionals for dependable current limitation, compact installation and reliable protection in demanding power distribution systems.
