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MERSEN FUSE 300V 45A T FUSE A3T45
Fast-acting Class T fuse with 450A rating, suitable for AC/DC applications up to 300VAC and 160VDC. Features a blade Amp-Trap design with bolted mounting and high breaking capacity of 200 kA.
£18.63
Why Choose the Mersen A3T45 Class T Fast-Acting Fuse?
The Mersen A3T45 is a high-performance Class T fast-acting fuse engineered to provide superior overcurrent protection for industrial electrical distribution systems. Part of the trusted Mersen Amp-Trap® A3T series, this fuse delivers exceptional current-limiting performance while protecting valuable electrical equipment from short circuits and fault currents.
Designed with a compact footprint and high interrupting capacity, the A3T45 is ideal for applications where space is limited without compromising protection. Its unique Class T dimensions prevent substitution with lower-performance fuse classes, helping maintain electrical safety and system compliance.
With a 45 A current rating, 300 V AC / 160 V DC voltage rating and fast-acting characteristics, the Mersen A3T45 is widely used in switchboards, panelboards, load centres, metering equipment and industrial power distribution systems requiring rapid fault interruption.
Key Advantages
- Compact Class T fast-acting fuse for industrial protection.
- 45 A current rating for branch circuit and equipment protection.
- 300 V AC / 160 V DC rated voltage.
- Exceptional current-limiting performance reduces equipment damage.
- Unique Class T dimensions prevent incorrect fuse replacement.
- Suitable for demanding commercial and industrial electrical installations.
Key Features
- Mersen Amp-Trap® A3T Class T fuse series.
- Fast-acting fuse characteristic.
- 45 A rated current.
- 300 V AC / 160 V DC voltage rating.
- 50 / 60 Hz operation.
- Ferrule construction with glass melamine body.
- Extremely current-limiting design.
- Permanent catalogue number identification.
Reliable Circuit Protection for Industrial Systems
The Mersen A3T45 is designed to interrupt fault currents almost instantly, helping minimise equipment damage, reduce downtime and improve overall electrical system reliability. Its high current-limiting capability significantly lowers let-through energy during fault conditions, protecting downstream components.
As part of the Amp-Trap® Class T family, this fuse is commonly selected by electrical engineers, panel builders and maintenance professionals for installations where dependable overcurrent protection and compact installation are essential.
Typical Applications
- Industrial switchboards.
- Electrical panelboards.
- Load centres.
- Metering equipment.
- Circuit breaker protection.
- Commercial and industrial power distribution systems.
Technical Specifications
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| Current | 45 A | |
|---|---|---|
| Voltage | 300 V | |
| Fuse Type | UL class | |
| Fuse Class | Fast acting | |
| Item number | A3T450 | |
| Description | Fuse A3T - Class T - Fast-Acting 300VAC 160VDC 450A Blade Amp-Trap® | |
| EAN/UPC Code | 782001890292 | |
| Rated voltage AC UL | 300 V | |
| Rated voltage DC UL | 160 V | |
| Frequency (Hz) | 50/60 Hz | |
| Ampere Rating | 450 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 | 41.1 mm | |
| Product Length | 77.7 mm | |
| Sell Pack Quantity | 1 EA | |
| Sell Pack Weight | 0.2132 kg | |
| Sell Pack Width | 42.9 mm | |
| Sell Pack Length | 42.9 mm | |
| Sell Pack Height | 81 mm | |
| Product group | Low Voltage UL/CSA Fuses | |
| Body/Insulating Material | GMG | |
| Product Weight | 0.2023 kg | |
| HS Code | 85361050 | |
| Country of Manufacture | Mexico |
Frequently Asked Questions
What is the Mersen A3T45 used for?
The A3T45 provides fast-acting overcurrent protection for industrial electrical distribution systems, helping protect equipment against short circuits and fault currents.
What is the current rating of the A3T45?
The fuse has a 45 A current rating.
What voltage is the A3T45 rated for?
The fuse is rated for 300 V AC and 160 V DC.
What type of fuse is the A3T45?
It is a Class T fast-acting fuse from the Mersen Amp-Trap® product range.
Where is the A3T45 typically installed?
It is commonly installed in industrial panelboards, switchboards, load centres, metering centres and other commercial electrical distribution equipment.
Trusted by Electrical Professionals Worldwide
Mersen Amp-Trap® Class T fuses are trusted by electrical engineers, OEMs and panel builders worldwide for delivering dependable overcurrent protection, exceptional current limitation and long-term reliability in demanding industrial power systems.
