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MERSEN FUSE L TD FUSE 600V 1400A A4BQ A4BQ1400
The Fuse A4BQ1400 offers dependable protection for demanding industrial power systems, with a robust 1400A current rating designed to handle high-capacity circuits up to 600VAC and 500VDC. Its time-delay feature effectively safeguards equipment against overloads and short circuits, supporting smooth system start-ups and minimising nuisance tripping.
£961.43
Why Choose the Mersen A4BQ1400 Class L Fuse?
The Mersen A4BQ1400 is a high-capacity Class L time-delay current-limiting fuse designed to protect industrial power distribution systems, service entrance equipment and heavy-duty electrical installations against overloads and short circuits. As part of the established Mersen Amp-Trap 2000 A4BQ series, it combines advanced current limitation with controlled time-delay performance for dependable protection in demanding applications.
Rated at 1400 A, 600 V AC and 500 V DC, the A4BQ1400 is engineered for systems carrying substantial load currents and exposed to high prospective fault levels. Its current-limiting construction reduces peak let-through current and fault energy, helping protect switchgear, conductors, busbars, transformers and connected equipment from severe thermal and mechanical stress.
The fuse incorporates a time-delay characteristic that accommodates temporary motor starting currents, transformer energisation and other normal electrical inrush conditions. This helps prevent unnecessary fuse operation while maintaining rapid interruption of dangerous short-circuit currents. Its Class L rejection-style construction supports secure installation and helps prevent replacement with an unsuitable fuse type.
Key Advantages
- Heavy-duty Class L time-delay current-limiting fuse.
- 1400 A current rating for high-capacity electrical systems.
- 600 V AC and 500 V DC voltage ratings.
- High interrupting capacity for demanding fault-current environments.
- Time-delay operation accommodates temporary equipment inrush currents.
- Current-limiting performance reduces damaging fault energy.
Key Features
- Mersen Amp-Trap 2000 A4BQ series.
- 1400 A rated current.
- 600 V AC maximum voltage rating.
- 500 V DC maximum voltage rating.
- Class L rejection-style fuse construction.
- Time-delay characteristic for motors, transformers and inductive loads.
- Current-limiting protection for high available fault currents.
- Bolted-blade terminals for secure industrial installation.
Reliable Protection for High-Power Distribution Systems
The Mersen A4BQ1400 interrupts excessive fault currents before they can reach their maximum prospective value. By reducing peak current and let-through energy, the fuse helps limit damage to switchboards, cables, busbars and other critical electrical distribution components.
Its time-delay performance allows normal temporary surges associated with motors, transformers and inductive equipment to pass without nuisance operation. This makes the A4BQ1400 suitable for industrial systems where reliable protection, selective coordination and operational continuity are important.
Typical Applications
- Industrial switchboards and distribution panels.
- Service entrance equipment and main feeder circuits.
- Motor control centres and high-current motor circuits.
- Transformer primary and secondary protection.
- Industrial disconnect switches.
- UPS systems, battery circuits and compatible DC equipment.
Technical Specifications
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| Current | 1400 A | |
|---|---|---|
| Voltage | 600 V | |
| Fuse Type | UL class | |
| Fuse Class | Time delay | |
| Item number | A4BQ1400 | |
| Description | Fuse A4BQ - Class L - Time-Delay 600VAC 500VDC 1400A Blade Amp-Trap 2000® | |
| EAN/UPC Code | 782001930097 | |
| Rated voltage AC UL | 600 V | |
| Rated voltage DC UL | 500 V | |
| Frequency (Hz) | 50/60 Hz | |
| Ampere Rating | 1400 A | |
| AC or DC | AC/DC | |
| Fuse Class | Class L | |
| Speed/Characteristic | Time Delay | |
| Mounting | Bolted | |
| AC Max I.R./Breaking Capacity | I1: 200 kA | |
| Connection/Terminal Material | Silver-Plated Copper | |
| Connection/Terminal Type | Blade | |
| Product Diameter | 76.2 mm | |
| Product Length | 273 mm | |
| Sell Pack Quantity | 1 EA | |
| Sell Pack Weight | 2.844 kg | |
| Sell Pack Width | 88.9 mm | |
| Sell Pack Length | 279.4 mm | |
| Sell Pack Height | 82.6 mm | |
| Product group | Low Voltage UL/CSA Fuses | |
| Body/Insulating Material | GMG | |
| Product Weight | 2.7079 kg | |
| HS Code | 85361090 | |
| Country of Manufacture | Mexico |
Frequently Asked Questions
What is the Mersen A4BQ1400 used for?
The Mersen A4BQ1400 protects high-current industrial power distribution systems, service entrance equipment, feeders, transformers and motor circuits against overloads and short circuits.
What is the current rating of the A4BQ1400?
The fuse has a rated current of 1400 A.
What voltage is the A4BQ1400 rated for?
The A4BQ1400 is rated for electrical systems operating at up to 600 V AC or 500 V DC.
Why does the A4BQ1400 have a time delay?
The time-delay characteristic permits temporary inrush currents from motors, transformers and other inductive loads without unnecessary fuse operation.
Which fuse holder is required for the A4BQ1400?
The fuse must be installed in a compatible 1400 A Class L fuse holder with voltage and interrupting ratings suitable for the electrical system.
Trusted Industrial Circuit Protection
Mersen Amp-Trap 2000 Class L fuses are widely specified by electrical engineers, panel builders and industrial facilities for reliable protection of high-capacity power distribution systems.
