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MERSEN FUSE L TD FUSE 600V 700A A4BQ A4BQ700
The A4BQ700 offers robust circuit protection with a 700A time-delay feature, enabling reliable safeguarding against surges and short circuits in demanding industrial environments. Designed for both AC (600VAC) and DC (500VDC) applications, this Class L fuse is ideal for complex power distribution systems requiring high interrupting capacity and minimal downtime.
£738.01
Why Choose the Mersen A4BQ700 Class L Time-Delay Fuse?
The Mersen A4BQ700 is a high-performance Class L time-delay fuse designed to provide dependable overcurrent and short-circuit protection for demanding industrial and commercial power distribution systems. Part of the trusted Mersen Amp-Trap 2000® A4BQ series, it is suitable for service entrance equipment, switchgear, feeder circuits and other high-capacity electrical installations.
Mersen states that Amp-Trap 2000® A4BQ fuses offer 20% greater current limitation than other Class L fuses. This enhanced current-limiting performance helps reduce damaging short-circuit let-through current and provides improved protection for downstream conductors, switchgear and connected electrical equipment.
Rated at 700 A, 600 V AC and 500 V DC, the A4BQ700 combines a high interrupting capacity with a built-in 4-second time-delay characteristic at 500% of rated current. This allows harmless temporary inrush currents from motors, transformers and other inductive loads to pass without nuisance fuse operation.
Key Advantages
- Reliable Class L time-delay protection for high-capacity electrical systems.
- 700 A current rating for demanding industrial distribution circuits.
- 600 V AC and 500 V DC voltage ratings.
- Amp-Trap 2000® technology provides enhanced current limitation.
- Time-delay operation accommodates normal equipment start-up currents.
- 200 kA AC interrupting capacity for severe fault protection.
Key Features
- Mersen Amp-Trap 2000® A4BQ series.
- 700 A rated current.
- 600 V AC rated voltage.
- 500 V DC rated voltage.
- Class L current-limiting fuse.
- 4-second time delay at 500% of rated current.
- 200 kA AC maximum interrupting capacity.
- Bolted blade mounting.
- Silver-plated copper terminals.
- Suitable for 50 / 60 Hz electrical systems.
- RoHS compliant.
Advanced Protection for Industrial Power Distribution
The Mersen A4BQ700 limits the peak current and energy passing through a circuit during a short-circuit event. This helps reduce thermal and mechanical stress on downstream components, supporting improved protection of switchboards, conductors, busbars and connected electrical equipment.
Its time-delay characteristic makes the fuse particularly suitable for circuits containing motors, transformers and other inductive equipment. Temporary start-up currents can pass without nuisance opening, while sustained overloads and severe short-circuit faults are interrupted to protect the electrical installation.
Typical Applications
- Service entrance equipment.
- Industrial switchgear and switchboards.
- Main electrical distribution panels.
- High-capacity feeder circuits.
- Motor control centres.
- Transformer protection systems.
- Manufacturing and processing facilities.
- Commercial and industrial power infrastructure.
Technical Specifications
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| Current | 700 A | |
|---|---|---|
| Voltage | 600 V | |
| Fuse Type | UL class | |
| Fuse Class | Time delay | |
| Item number | A4BQ700 | |
| Description | Fuse A4BQ - Class L - Time-Delay 600VAC 500VDC 700A Blade Amp-Trap 2000® | |
| EAN/UPC Code | 782001930028 | |
| Rated voltage AC UL | 600 V | |
| Rated voltage DC UL | 500 V | |
| Frequency (Hz) | 50/60 Hz | |
| Ampere Rating | 700 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 | 1.7962 kg | |
| Sell Pack Width | 63.5 mm | |
| Sell Pack Length | 222.2 mm | |
| Sell Pack Height | 60.5 mm | |
| Product group | Low Voltage UL/CSA Fuses | |
| Body/Insulating Material | GMG | |
| Product Weight | 1.71 kg | |
| HS Code | 85361090 | |
| Country of Manufacture | Mexico |
Frequently Asked Questions
What is the Mersen A4BQ700 used for?
The A4BQ700 provides overcurrent and short-circuit protection for service entrance equipment, switchgear, feeder circuits and industrial power distribution systems.
What is the current rating of the A4BQ700?
The fuse has a rated current of 700 A.
What voltage ratings does the A4BQ700 support?
The Mersen A4BQ700 is rated for up to 600 V AC and 500 V DC.
What is the interrupting capacity of the A4BQ700?
The fuse has a maximum AC interrupting capacity of 200 kA.
Why does the A4BQ700 have a time-delay characteristic?
Its 4-second time delay at 500% of rated current allows temporary motor, transformer and equipment inrush currents to pass without nuisance fuse operation.
Trusted for Industrial Circuit Protection
Mersen Amp-Trap 2000® Class L fuses are widely specified for critical power distribution systems requiring effective current limitation, high interrupting performance and dependable protection against overloads and short-circuit faults.
