Why Choose the Mersen A4BQ1600 Class L Fuse?
The Mersen A4BQ1600 is a high-capacity Class L time-delay current-limiting fuse designed to protect industrial power distribution systems, service entrance equipment and heavy-duty electrical installations against overloads and short circuits. As part of the proven Mersen Amp-Trap 2000 A4BQ series, it combines advanced current-limiting technology with a controlled time-delay characteristic to deliver dependable protection in demanding industrial environments.
Rated at 1600 A, 600 V AC and 500 V DC, the A4BQ1600 is engineered for high-power applications with substantial available fault currents. Its current-limiting construction reduces peak let-through current and fault energy, helping protect switchgear, transformers, busbars, conductors and downstream equipment from thermal and mechanical damage.
The built-in 4-second time-delay characteristic allows harmless inrush currents associated with motors, transformers and inductive equipment to pass without nuisance operation while maintaining rapid interruption of sustained overloads and short-circuit faults. Its rejection-style Class L design helps ensure correct fuse replacement and safe installation.
Key Advantages
- Heavy-duty Class L time-delay current-limiting fuse.
- 1600 A current rating for high-capacity industrial systems.
- 600 V AC and 500 V DC voltage ratings.
- High interrupting capacity for demanding fault-current applications.
- Built-in 4-second time-delay reduces nuisance fuse operation.
- Current-limiting performance helps minimise damaging fault energy.
Key Features
- Mersen Amp-Trap 2000 A4BQ series.
- 1600 A rated current.
- 600 V AC maximum voltage rating.
- 500 V DC maximum voltage rating.
- Class L rejection-style fuse construction.
- 4-second time-delay at 500% rated current.
- Current-limiting design for superior equipment protection.
- Bolted-blade terminals for secure installation.
Reliable Protection for High-Power Distribution Systems
The Mersen A4BQ1600 rapidly interrupts damaging fault currents before they reach their maximum prospective value. By limiting peak current and let-through energy, it helps protect expensive electrical infrastructure while improving system reliability and reducing maintenance costs.
Its time-delay operation allows temporary inrush currents from motors and transformers to pass normally, making it well suited to service entrance equipment, feeder circuits and other industrial applications where selective coordination and operational continuity are essential.
Typical Applications
- Industrial switchboards.
- Service entrance equipment.
- Main distribution and feeder circuits.
- Motor control centres.
- Transformer protection.
- Heavy industrial power distribution systems.
