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MERSEN FUSE 600V 100A L TD FUSE A4BQ100
The A4BQ100 is engineered for robust circuit protection in demanding industrial environments, offering reliable time-delay response to handle high inrush currents without nuisance openings.
£620.14
Why Choose the Mersen A4BQ100 Class L Fuse?
The Mersen A4BQ100 is a premium Class L time-delay current-limiting fuse designed to provide outstanding protection for industrial power distribution systems, service entrance equipment and high-current electrical installations. As part of the renowned Mersen Amp-Trap 2000 A4BQ series, it delivers exceptional short-circuit protection while accommodating temporary inrush currents without unnecessary fuse operation.
Rated at 100 A with a maximum operating voltage of 600 V AC and 500 V DC, the A4BQ100 offers high interrupting capacity and advanced current-limiting performance. Its built-in 4-second time-delay characteristic allows harmless motor starting and transformer energisation currents to pass while still providing rapid protection against damaging overloads and short circuits.
The A4BQ100 is widely specified for service entrance protection, feeder circuits, large motors and industrial switchgear where dependable circuit protection and selective coordination are essential. Its rejection-style Class L design helps prevent incorrect fuse replacement, improving safety and system reliability.
Key Advantages
- Industrial Class L time-delay current-limiting fuse.
- 100 A current rating for high-power applications.
- 600 V AC and 500 V DC ratings.
- 200 kA AC interrupting capacity for high fault-current systems.
- Built-in 4-second time-delay helps prevent nuisance operation during inrush currents.
- Rejection-style design helps prevent incorrect fuse substitution.
Key Features
- Mersen Amp-Trap 2000 A4BQ series.
- 100 A rated current.
- 600 V AC maximum voltage.
- 500 V DC maximum voltage.
- Class L time-delay current-limiting design.
- Fast arc-quenching silica filler construction.
- Fibreglass body for dimensional stability.
- Blade terminals for Class L fuse holders.
Reliable Protection for Industrial Power Distribution
The Mersen A4BQ100 combines high interrupting capacity with controlled time-delay characteristics to protect electrical systems while allowing temporary inrush currents associated with motors, transformers and other inductive loads. Its current-limiting performance reduces thermal and mechanical stress on downstream equipment during fault conditions.
Designed for critical industrial installations, the Amp-Trap 2000 A4BQ range provides dependable protection for mains, feeders and service entrance equipment while supporting selective coordination to minimise unnecessary system shutdowns.
Typical Applications
- Service entrance equipment.
- Main distribution switchboards.
- Industrial feeder circuits.
- Large motors and motor control centres.
- Circuit breaker back-up protection.
- UPS DC links and battery disconnect systems.
Technical Specifications
Tick the specs you need, then view products that match.
| Current | 100 A | |
|---|---|---|
| Voltage | 600 V | |
| Fuse Type | UL class | |
| Fuse Class | Time delay | |
| Item number | A4BQ100 | |
| Description | Fuse A4BQ - Class L - Time-Delay 600VAC 500VDC 100A Blade Amp-Trap 2000® | |
| EAN/UPC Code | 782001931070 | |
| Rated voltage AC UL | 600 V | |
| Rated voltage DC UL | 500 V | |
| Frequency (Hz) | 50/60 Hz | |
| Ampere Rating | 100 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 | 50.8 mm | |
| Product Length | 219.2 mm | |
| Sell Pack Quantity | 1 EA | |
| Sell Pack Weight | 1.1612 kg | |
| Sell Pack Width | 53.8 mm | |
| Sell Pack Length | 53.8 mm | |
| Sell Pack Height | 223.8 mm | |
| Product group | Low Voltage UL/CSA Fuses | |
| Body/Insulating Material | GMG | |
| Product Weight | 1.1068 kg | |
| HS Code | 85361090 | |
| Country of Manufacture | Mexico |
Frequently Asked Questions
What is the Mersen A4BQ100 used for?
The A4BQ100 protects industrial power distribution systems, service entrance equipment, motors and feeder circuits from overloads and short circuits.
What is the current rating of the A4BQ100?
The Mersen A4BQ100 has a rated current of 100 A.
What voltage is the A4BQ100 rated for?
The fuse is rated for applications up to 600 V AC and 500 V DC.
What does the time-delay feature do?
The built-in time-delay characteristic allows temporary inrush currents, such as motor starting currents, to pass without nuisance fuse operation while still protecting against sustained overloads and short circuits.
Where is the A4BQ100 typically installed?
It is commonly installed in service entrance equipment, switchboards, feeder circuits, motor control centres and industrial power distribution systems using compatible Class L fuse holders.
Trusted Industrial Circuit Protection
Mersen Amp-Trap 2000 Class L fuses are trusted worldwide by electrical engineers and industrial facilities for dependable protection of critical power distribution systems and high-current electrical installations.
