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MERSEN FUSE AT-FORM 480 A4BQ3800
The Fuse A4BQ3800 offers robust overcurrent protection for high-capacity industrial and commercial circuits, operating reliably at up to 600VAC and 3800 amps with time-delay characteristics to handle surge conditions.
£2,700.40
Why Choose the Mersen A4BQ3800 Class L Time-Delay Fuse?
The Mersen A4BQ3800 is a high-capacity Class L time-delay fuse designed to provide reliable overcurrent and short-circuit protection for demanding industrial and commercial power distribution systems. As part of the advanced Mersen Amp-Trap 2000® A4BQ series, it offers exceptional current-limiting performance for service entrance equipment, switchgear, feeder circuits and other critical electrical installations.
The A4BQ3800 is engineered to limit damaging short-circuit let-through current, helping protect downstream cables, conductors and electrical equipment. Mersen states that Amp-Trap 2000 A4BQ fuses are 20% more current limiting than other Class L fuses, providing an enhanced level of protection when correctly coordinated within an electrical distribution system.
With a rated current of 3800 A and an operating voltage of 600 V AC, this fuse is suitable for very high-current applications. Its built-in 4-second time-delay characteristic at 500% of rated current accommodates harmless motor, transformer and equipment inrush currents without unnecessary fuse operation.
Key Advantages
- Heavy-duty Class L fuse designed for high-current applications.
- 3800 A current rating for large industrial power systems.
- 600 V AC voltage rating suitable for commercial and industrial installations.
- Advanced Amp-Trap 2000® current-limiting technology.
- Built-in time delay helps prevent nuisance operation during temporary inrush currents.
- 200 kA AC interrupting rating for effective short-circuit protection.
Key Features
- Mersen Amp-Trap 2000® A4BQ series.
- 3800 A rated current.
- 600 V AC rated voltage.
- Class L time-delay characteristic.
- 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 Electrical Systems
The Mersen A4BQ3800 helps protect electrical installations against overloads and severe short-circuit currents. Its current-limiting design reduces the amount of fault current and energy that can pass through the circuit, helping minimise thermal and mechanical stress on downstream equipment.
The time-delay characteristic allows temporary inrush currents from transformers, motors and other inductive equipment to pass without nuisance opening. This combination of high interrupting capacity, current limitation and controlled time-delay performance makes the A4BQ3800 suitable for critical power distribution applications where reliability and equipment protection are essential.
Typical Applications
- Service entrance equipment.
- Industrial switchgear and switchboards.
- Main electrical distribution panels.
- High-current feeder circuits.
- Large motor and transformer installations.
- Manufacturing and processing facilities.
- Commercial and industrial power infrastructure.
Technical Specifications
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| Fuse Type | UL class | |
|---|---|---|
| Fuse Class | Time delay | |
| Voltage | 600 V | |
| Item number | A4BQ3800 | |
| Description | Fuse A4BQ - Class L - Time-Delay 600VAC 3800A Blade Amp-Trap 2000® | |
| EAN/UPC Code | 782001930882 | |
| Rated voltage AC UL | 600 V | |
| Frequency (Hz) | 50/60 Hz | |
| Ampere Rating | 3800 A | |
| AC or DC | AC | |
| 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 | 146 mm | |
| Product Length | 273 mm | |
| Sell Pack Quantity | 1 EA | |
| Sell Pack Weight | 1.1929 kg | |
| Sell Pack Width | 152.4 mm | |
| Sell Pack Length | 298.4 mm | |
| Sell Pack Height | 146 mm | |
| Product group | Low Voltage UL/CSA Fuses | |
| Body/Insulating Material | GMG | |
| Product Weight | 1.134 kg | |
| HS Code | 85361090 | |
| Country of Manufacture | Mexico |
Frequently Asked Questions
What is the Mersen A4BQ3800 used for?
The A4BQ3800 provides overcurrent and short-circuit protection for high-current service entrance equipment, switchgear, distribution systems and feeder circuits.
What is the current rating of the A4BQ3800?
The fuse has a rated current of 3800 A.
What voltage is the Mersen A4BQ3800 rated for?
The A4BQ3800 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 A4BQ3800 have a time-delay characteristic?
Its 4-second time delay at 500% of rated current allows harmless temporary inrush currents to pass without nuisance opening while maintaining reliable overload and short-circuit protection.
Trusted for High-Capacity Power Protection
Mersen Amp-Trap 2000® Class L fuses are widely specified for high-capacity electrical distribution systems where dependable current limitation, high interrupting performance and protection against damaging fault currents are required.
