Why Choose the Mersen A4BQ1350 Class L Fuse?
The Mersen A4BQ1350 is a high-capacity Class L time-delay current-limiting fuse designed to protect industrial power distribution systems, service entrance equipment and high-current electrical installations against damaging overloads and short circuits. As part of the established Mersen Amp-Trap 2000 A4BQ series, it combines dependable time-delay performance with advanced current limitation for critical power applications.
Rated at 1350 A, 600 V AC and 500 V DC, the A4BQ1350 is engineered for electrical systems with substantial load and prospective fault currents. Its current-limiting construction reduces peak let-through current and fault energy, helping protect switchgear, busbars, cables, transformers and other downstream equipment from severe thermal and mechanical stress.
The fuse incorporates a controlled time-delay characteristic that allows temporary motor starting, transformer energisation and equipment inrush currents to pass without unnecessary operation. Its rejection-style Class L construction supports correct fuse selection and secure installation within compatible industrial fuse holders and distribution assemblies.
Key Advantages
- Heavy-duty Class L time-delay current-limiting fuse.
- 1350 A current rating for high-capacity electrical systems.
- 600 V AC and 500 V DC voltage ratings.
- High interrupting capacity for demanding fault-current environments.
- Time-delay performance accommodates temporary equipment inrush currents.
- Current-limiting operation reduces damaging thermal and mechanical energy.
Key Features
- Mersen Amp-Trap 2000 A4BQ series.
- 1350 A rated current.
- 600 V AC maximum voltage rating.
- 500 V DC maximum voltage rating.
- Class L rejection-style fuse construction.
- Time-delay characteristic for high-inrush electrical loads.
- Current-limiting protection for high fault-current systems.
- Bolted-blade terminals for secure industrial installation.
Reliable Protection for High-Power Distribution Systems
The Mersen A4BQ1350 interrupts excessive fault currents before they can reach their maximum prospective value. By limiting peak current and let-through energy, the fuse helps reduce equipment damage and the forces imposed on conductors, switchgear and other electrical distribution components.
Its time-delay performance allows normal temporary surges associated with motors, transformers and inductive equipment to pass without nuisance operation. This makes the A4BQ1350 suitable for critical industrial systems where reliable protection, system coordination and operational continuity are essential.
Typical Applications
- Industrial switchboards and distribution panels.
- Service entrance equipment and main feeder circuits.
- Motor control centres and high-current motor circuits.
- Transformer primary and secondary protection.
- Industrial disconnect switches.
- UPS systems, battery circuits and compatible DC equipment.
