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MERSEN FUSE L TD FUSE 600V 5000A A4BQ A4BQ5000
The A4BQ5000 fuse offers reliable circuit protection up to 600VAC and 5000A with a Class L time-delay characteristic and TA indicator for quick blown fuse identification.
£2,858.73
Why Choose the Mersen A4BQ5000 Class L Time-Delay Fuse?
The Mersen A4BQ5000 is a high-capacity Class L time-delay fuse engineered to provide dependable overcurrent and short-circuit protection for demanding industrial and commercial power distribution systems. As part of the proven Mersen Amp-Trap 2000® A4BQ series, it is designed for service entrance equipment, switchgear, feeder circuits and other critical installations requiring effective current limitation.
The A4BQ5000 is designed to reduce damaging short-circuit let-through current, helping protect downstream conductors, switchgear and connected electrical equipment. Its built-in 4-second time-delay characteristic at 500% of rated current accommodates harmless temporary inrush currents from motors, transformers and other inductive loads without unnecessary fuse operation.
With a rated current of 5000 A and a 600 V AC voltage rating, the A4BQ5000 is suitable for extremely high-current electrical systems. Its bolted blade construction, silver-plated copper terminals and 200 kA interrupting capacity make it a robust solution for critical power protection applications.
Key Advantages
- Heavy-duty Class L time-delay fuse for high-current power systems.
- 5000 A current rating for major electrical distribution circuits.
- 600 V AC voltage rating for industrial and commercial installations.
- Advanced Amp-Trap 2000® current-limiting technology.
- 4-second time delay helps prevent nuisance opening during equipment start-up.
- 200 kA AC interrupting capacity for severe short-circuit protection.
Key Features
- Mersen Amp-Trap 2000® A4BQ series.
- 5000 A rated current.
- 600 V AC rated voltage.
- Class L time-delay fuse.
- 4-second time delay at 500% of rated current.
- 200 kA AC maximum interrupting capacity.
- Silver-plated copper blade terminals.
- Bolted mounting for secure installation.
- RoHS-compliant construction.
- Suitable for 50 / 60 Hz electrical systems.
Reliable Protection for High-Current Power Distribution
The Mersen A4BQ5000 protects critical electrical infrastructure against sustained overloads and severe short-circuit faults. Its current-limiting design reduces the amount of fault current and energy passing through the circuit, helping minimise thermal and mechanical stress on downstream equipment.
The time-delay characteristic allows normal temporary inrush currents from large motors, transformers and other inductive equipment to pass without nuisance opening. This combination of controlled time-delay performance, high interrupting capacity and effective current limitation makes the A4BQ5000 suitable for demanding electrical distribution systems where reliability and safety are essential.
Typical Applications
- Service entrance equipment.
- Industrial switchgear and switchboards.
- Main electrical distribution systems.
- High-current feeder circuits.
- Large motor control installations.
- Transformer protection systems.
- Heavy industrial and commercial power infrastructure.
Technical Specifications
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| Fuse Indication | Visual indicator | |
|---|---|---|
| Current | 5000 A | |
| Voltage | 600 V | |
| Fuse Type | UL class | |
| Fuse Class | Time delay | |
| Item number | A4BQ5000-TA | |
| Description | Fuse A4BQ - Class L - Time-Delay 600VAC 5000A Blade TA Indicator Amp-Trap 2000® | |
| EAN/UPC Code | 782001294175 | |
| Rated voltage AC UL | 600 V | |
| Frequency (Hz) | 50/60 Hz | |
| Ampere Rating | 5000 A | |
| AC or DC | AC | |
| Fuse Class | Class L | |
| Speed/Characteristic | Time Delay | |
| Mounting | Bolted | |
| AC Max I.R./Breaking Capacity | I1: 200 kA | |
| Indication System | Yes | |
| Indication System Type | TA Indicator | |
| Connection/Terminal Material | Silver-Plated Copper | |
| Connection/Terminal Type | Blade | |
| Product Diameter | 158.8 mm | |
| Product Length | 273 mm | |
| Sell Pack Quantity | 1 EA | |
| Sell Pack Weight | 15.1001 kg | |
| Sell Pack Width | 165.1 mm | |
| Sell Pack Length | 296.7 mm | |
| Sell Pack Height | 171.4 mm | |
| Product group | Low Voltage UL/CSA Fuses | |
| Body/Insulating Material | GMG | |
| Product Weight | 14.3789 kg | |
| HS Code | 85361090 | |
| Country of Manufacture | Mexico |
Frequently Asked Questions
What is the Mersen A4BQ5000 used for?
The A4BQ5000 provides overcurrent and short-circuit protection for high-capacity service entrance equipment, switchgear, feeder circuits and industrial power distribution systems.
What is the current rating of the A4BQ5000?
The fuse has a rated current of 5000 A.
What voltage is the Mersen A4BQ5000 rated for?
The A4BQ5000 is rated for operation at up to 600 V AC.
What is the interrupting capacity of this fuse?
The fuse has a maximum AC interrupting capacity of 200 kA.
Why does the A4BQ5000 have a time-delay characteristic?
Its 4-second time delay at 500% of rated current allows temporary motor and transformer inrush currents to pass without nuisance opening while maintaining reliable fault protection.
Trusted for High-Capacity Circuit Protection
Mersen Amp-Trap 2000® Class L fuses are widely used by electrical engineers, contractors and industrial facilities to provide dependable current limitation, high interrupting performance and reliable protection for critical power distribution systems.
