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MERSEN FUSE 300V 800A T FUSE A3T800
The Fuse A3T800 offers reliable fast-acting circuit protection for 300VAC and 160VDC systems with an 800A rating and 200 kA interrupting capacity.
£373.15
Why Choose the Mersen A3T800 Class T Fuse?
The Mersen A3T800 is a heavy-duty Class T current-limiting fuse engineered to provide exceptional protection for industrial electrical systems operating under high current conditions. Part of the trusted Mersen Amp-Trap 2000 A3T series, this fast-acting fuse offers outstanding short-circuit protection while maintaining a compact footprint for modern power distribution equipment.
Rated at 800 A with a 300 V AC voltage rating, the A3T800 delivers rapid fault interruption to minimise damage caused by overloads and short circuits. Its current-limiting characteristics significantly reduce peak fault current and let-through energy, helping to protect expensive switchgear, busbars, cables and downstream electrical equipment.
Designed for demanding industrial environments, the A3T800 is suitable for installation in switchboards, panelboards, load centres, disconnect switches and other high-power distribution systems. Its unique Class T dimensions prevent substitution with lower performance fuse types, ensuring safe and reliable circuit protection.
Key Advantages
- Compact Class T fast-acting fuse for industrial power protection.
- 800 A current rating for high-power applications.
- 300 V AC and 160 V DC voltage ratings.
- 200 kA AC interrupting capacity for high fault-current systems.
- Current-limiting design reduces thermal and mechanical stress on equipment.
- Compact construction allows efficient use of panel space.
Key Features
- Mersen Amp-Trap 2000 A3T series.
- 800 A rated current.
- 300 V AC maximum voltage rating.
- 160 V DC maximum voltage rating.
- Fast-acting Class T current-limiting protection.
- Glass melamine body for excellent dimensional stability.
- Blade terminals with permanently stamped catalogue number.
- Designed for industrial power distribution systems.
Reliable Protection for High-Power Electrical Systems
The Mersen A3T800 rapidly interrupts excessive fault currents before they reach damaging levels. Its advanced current-limiting design helps reduce equipment damage, lowers arc energy and improves the overall safety and reliability of industrial electrical installations.
The Amp-Trap 2000 A3T range is widely specified by engineers for critical power distribution applications where high interrupting capacity, compact dimensions and dependable performance are essential.
Typical Applications
- Industrial switchboards.
- Panelboards and distribution panels.
- Load centres.
- Motor control centres.
- Electrical disconnect switches.
- Heavy industrial power distribution equipment.
Technical Specifications
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| Current | 800 A | |
|---|---|---|
| Voltage | 300 V | |
| Fuse Type | UL class | |
| Fuse Class | Fast acting | |
| Item number | A3T800 | |
| Description | Fuse A3T - Class T - Fast-Acting 300VAC 160VDC 800A Blade Amp-Trap® | |
| EAN/UPC Code | 782001890810 | |
| Rated voltage AC UL | 300 V | |
| Rated voltage DC UL | 160 V | |
| Frequency (Hz) | 50/60 Hz | |
| Ampere Rating | 800 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 | 52.8 mm | |
| Product Length | 85.9 mm | |
| Sell Pack Quantity | 1 EA | |
| Sell Pack Weight | 0.381 kg | |
| Sell Pack Width | 53.8 mm | |
| Sell Pack Length | 53.8 mm | |
| Sell Pack Height | 88.9 mm | |
| Product group | Low Voltage UL/CSA Fuses | |
| Body/Insulating Material | GMG | |
| Product Weight | 0.3615 kg | |
| HS Code | 85361090 | |
| Country of Manufacture | Mexico |
Frequently Asked Questions
What is the Mersen A3T800 used for?
The A3T800 protects high-current industrial electrical circuits from overloads and short circuits while limiting damaging fault energy.
What is the current rating of the A3T800?
The Mersen A3T800 has a rated current of 800 A.
What voltage is the A3T800 rated for?
The fuse is rated for 300 V AC and 160 V DC applications.
Is the A3T800 a fast-acting fuse?
Yes. The A3T800 is a fast-acting Class T current-limiting fuse designed to interrupt high fault currents extremely quickly.
Where is the A3T800 typically installed?
It is commonly installed in industrial switchboards, panelboards, disconnect switches and power distribution equipment using compatible Class T fuse holders.
Trusted Industrial Circuit Protection
Mersen Amp-Trap Class T fuses are trusted worldwide by electrical engineers, OEMs and industrial maintenance professionals for dependable protection of high-power electrical distribution systems.
