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MERSEN FUSE L TD FUSE 600V 1000A A4BQ A4BQ1000
The A4BQ1000 fuse offers robust protection for high-capacity circuits, designed to handle up to 1000A at 600VAC or 500VDC. Its time-delay feature ensures superior protection against momentary surges and overloads, supporting heavy-duty industrial applications.
£738.88
Why Choose the Mersen A4BQ1000 Class L Fuse?
The Mersen A4BQ1000 is a high-capacity Class L time-delay current-limiting fuse designed to protect industrial power distribution equipment against damaging overloads and short-circuit currents. As part of the proven Mersen Amp-Trap 2000 A4BQ series, it provides dependable circuit protection for demanding installations where high interrupting capacity and controlled time-delay performance are essential.
Rated at 1000 A and 600 V AC, the A4BQ1000 is engineered for high-power electrical systems with substantial available fault currents. Its current-limiting construction reduces peak let-through current and fault energy, helping protect switchgear, conductors, busbars and connected equipment from severe thermal and mechanical stress.
The fuse also features a time-delay characteristic that permits temporary inrush currents associated with transformers, motors and other inductive loads. This helps prevent unnecessary fuse operation during normal equipment start-up while maintaining rapid response to dangerous short-circuit conditions. Its bolted-blade Class L format provides secure installation in compatible fuse holders and industrial distribution assemblies.
Key Advantages
- Heavy-duty Class L time-delay current-limiting fuse.
- 1000 A current rating for high-capacity electrical systems.
- 600 V AC and 500 V DC voltage ratings.
- High 200 kA RMS symmetrical AC interrupting rating.
- Time-delay performance accommodates temporary equipment inrush currents.
- Current-limiting operation reduces damaging fault energy.
Key Features
- Mersen Amp-Trap 2000 A4BQ series.
- 1000 A rated current.
- 600 V AC maximum voltage rating.
- 500 V DC maximum voltage rating.
- Class L current-limiting fuse construction.
- Time-delay characteristic for high-inrush loads.
- High interrupting capacity for industrial fault-current protection.
- Bolted-blade terminals for secure installation.
Reliable Protection for High-Power Distribution Systems
The Mersen A4BQ1000 limits the magnitude and duration of damaging short-circuit currents before they can reach their maximum prospective value. By reducing peak current and let-through energy, the fuse helps improve equipment protection and lowers the thermal and mechanical forces imposed on electrical distribution components.
Its time-delay performance allows normal temporary surges to pass without nuisance operation, making the A4BQ1000 particularly suitable for circuits supplying transformers, motors and other equipment with high start-up currents. The fuse supports reliable system coordination and helps minimise unnecessary disruption to industrial operations.
Typical Applications
- Industrial switchboards and distribution panels.
- Service entrance equipment and main feeder circuits.
- Motor control centres and large 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 | 1000 A | |
|---|---|---|
| Voltage | 600 V | |
| Fuse Type | UL class | |
| Fuse Class | Time delay | |
| Item number | A4BQ1000 | |
| Description | Fuse A4BQ - Class L - Time-Delay 600VAC 500VDC 1000A Blade Amp-Trap 2000® | |
| EAN/UPC Code | 782001939380 | |
| Rated voltage AC UL | 600 V | |
| Rated voltage DC UL | 500 V | |
| Frequency (Hz) | 50/60 Hz | |
| Ampere Rating | 1000 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 | 63.5 mm | |
| Product Length | 273 mm | |
| Sell Pack Quantity | 1 EA | |
| Sell Pack Weight | 2.0412 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 | 1.9459 kg | |
| HS Code | 85361090 | |
| Country of Manufacture | Mexico |
Frequently Asked Questions
What is the Mersen A4BQ1000 used for?
The Mersen A4BQ1000 protects high-current industrial distribution systems, service equipment, feeders, transformers and motor circuits against overloads and short circuits.
What is the current rating of the A4BQ1000?
The fuse has a rated current of 1000 A.
What voltage is the A4BQ1000 rated for?
The A4BQ1000 is rated for applications operating at up to 600 V AC or 500 V DC.
Why does the A4BQ1000 have a time delay?
The time-delay characteristic allows temporary inrush currents from motors, transformers and other inductive loads to pass without unnecessary fuse operation.
Which fuse holder is required for the A4BQ1000?
The fuse must be installed in a compatible 1000 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.
