Why Choose the Mersen A4BQ3500 Class L Time-Delay Fuse?
The Mersen A4BQ3500 is a heavy-duty Class L time-delay fuse engineered to provide exceptional overcurrent and short circuit protection for high-capacity industrial power distribution systems. As part of the trusted Amp-Trap 2000® A4BQ series, it is designed to protect service entrance equipment, switchgear, feeders and other high-current electrical installations where dependable fault protection is essential.
Featuring Mersen's advanced Amp-Trap 2000® current-limiting technology, the A4BQ3500 significantly reduces fault energy while protecting downstream equipment from damaging short circuit currents. Its integrated 4-second time-delay characteristic at 500% of rated current accommodates normal motor and transformer inrush currents, reducing nuisance fuse operation while maintaining superior protection.
Rated at 3500 A with a 600 V AC voltage rating, the A4BQ3500 is ideally suited for utility, commercial and industrial electrical systems requiring high interrupting capacity and reliable circuit protection in demanding environments.
Key Advantages
- Heavy-duty Class L time-delay fuse for industrial power distribution.
- 3500 A current rating for very high-capacity electrical systems.
- 600 V AC rated voltage for industrial installations.
- Advanced Amp-Trap 2000® current-limiting technology.
- 4-second time-delay helps prevent nuisance operation during equipment start-up.
- Provides outstanding protection for service entrance equipment and switchgear.
Key Features
- Mersen Amp-Trap 2000® A4BQ series.
- 3500 A ampere rating.
- 600 V AC voltage rating.
- Class L time-delay fuse.
- Current-limiting design reduces let-through current during faults.
- Blade mounting configuration.
- 50 / 60 Hz operation.
- Designed for service entrance, feeder and main distribution protection.
Reliable Protection for High-Current Electrical Systems
The Mersen A4BQ3500 is designed to protect critical electrical infrastructure against overloads and high fault currents while allowing temporary inrush currents associated with large motors, transformers and other inductive loads. Its advanced current-limiting performance reduces thermal and mechanical stress on downstream equipment, improving system reliability and safety.
As part of the proven Amp-Trap 2000® product family, the A4BQ3500 is widely used in demanding industrial and commercial installations where dependable protection, high interrupting capacity and long service life are essential.
Typical Applications
- Service entrance equipment.
- Industrial switchgear.
- Main power distribution systems.
- Feeder circuits.
- Large motor control installations.
- Heavy industrial and utility electrical systems.
