Why Choose the Mersen A4BQ600 Class L Time-Delay Fuse?
The Mersen A4BQ600 is a high-performance Class L time-delay fuse designed to provide dependable overcurrent and short-circuit protection for industrial and commercial power distribution systems. As part of the trusted Mersen Amp-Trap 2000® A4BQ series, it delivers industry-leading current-limiting performance for service entrance equipment, switchgear, feeder circuits and other high-capacity electrical installations.
Featuring advanced Amp-Trap 2000® current-limiting technology, the A4BQ600 reduces damaging fault energy and provides superior protection for downstream equipment. Its built-in 4-second time-delay characteristic at 500% of rated current allows motors, transformers and other inductive loads to start normally without nuisance fuse operation, improving system reliability and reducing downtime.
Rated at 600 A with 600 V AC and 500 V DC voltage ratings, the A4BQ600 is ideal for demanding industrial power distribution applications requiring high interrupting capacity and reliable circuit protection.
Key Advantages
- Heavy-duty Class L time-delay fuse for industrial power distribution.
- 600 A current rating for high-capacity electrical systems.
- 600 V AC / 500 V DC voltage ratings.
- Advanced Amp-Trap 2000® current-limiting technology.
- 4-second time delay prevents nuisance operation during motor and transformer start-up.
- High interrupting capacity protects critical electrical equipment.
Key Features
- Mersen Amp-Trap 2000® A4BQ series.
- 600 A ampere rating.
- 600 V AC / 500 V DC rated voltage.
- Class L time-delay fuse.
- Current-limiting design reduces let-through current.
- 4-second minimum time delay at 500% rated current.
- Blade terminal construction.
- Suitable for service entrance, feeder and branch circuit protection.
Reliable Protection for Industrial Power Systems
The Mersen A4BQ600 is designed to protect electrical distribution systems against overloads and severe short-circuit currents while accommodating temporary inrush currents generated by motors, transformers and other inductive equipment. Its advanced current-limiting design helps minimise thermal and mechanical stress on downstream electrical components, improving system safety and extending equipment life.
As part of the trusted Amp-Trap 2000® product family, the A4BQ600 is widely specified for industrial and commercial power distribution systems where dependable overcurrent protection, high interrupting performance and operational reliability are essential.
Typical Applications
- Service entrance equipment.
- Industrial switchgear and switchboards.
- Main electrical distribution systems.
- Feeder circuits.
- Motor control centres.
- Transformer protection.
- Commercial and industrial electrical installations.
