Why Choose the Mersen A4BQ2000 Class L Fuse?
The Mersen A4BQ2000 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 damaging overloads and short circuits. Part of the established Mersen Amp-Trap 2000 A4BQ series, it combines dependable time-delay performance with advanced current limitation for demanding high-power applications.
Rated at 2000 A, 600 V AC and 500 V DC, the A4BQ2000 is engineered for electrical systems carrying substantial load currents and exposed to high prospective fault levels. Its current-limiting construction reduces peak let-through current and fault energy, helping protect switchgear, busbars, transformers, conductors and connected equipment from severe thermal and mechanical stress.
The fuse features a controlled four-second time delay at 500% of rated current, allowing temporary motor-starting currents, transformer energisation and other normal equipment inrush conditions to pass without nuisance operation. Its rejection-style Class L construction supports correct fuse selection and secure installation in compatible industrial fuse equipment.
Key Advantages
- Heavy-duty Class L time-delay current-limiting fuse.
- 2000 A current rating for high-capacity power systems.
- 600 V AC and 500 V DC voltage ratings.
- High interrupting capacity for demanding fault-current environments.
- Four-second time delay accommodates temporary equipment inrush currents.
- Current-limiting performance reduces damaging thermal and mechanical energy.
Key Features
- Mersen Amp-Trap 2000 A4BQ series.
- 2000 A rated current.
- 600 V AC maximum voltage rating.
- 500 V DC maximum voltage rating.
- Class L rejection-style fuse construction.
- Four-second time delay at 500% rated current.
- Current-limiting design for enhanced equipment protection.
- Bolted-blade terminals for secure industrial installation.
Reliable Protection for High-Power Distribution Systems
The Mersen A4BQ2000 interrupts excessive fault currents before they can reach their maximum prospective value. By limiting peak current and let-through energy, the fuse helps reduce damage to switchboards, cables, busbars, transformers and other critical electrical distribution components.
Its time-delay characteristic allows normal temporary surges associated with motors, transformers and inductive equipment to pass without unnecessary operation. This makes the A4BQ2000 suitable for installations where dependable protection, selective coordination and operational continuity are essential.
Typical Applications
- Industrial switchboards and distribution panels.
- Service entrance equipment.
- Main distribution and feeder circuits.
- Motor control centres.
- Transformer primary and secondary protection.
- Industrial disconnect switches.
- Heavy manufacturing and process equipment.
- Compatible high-current AC and DC systems.
