A4BY750 - 750Amp Fuse Description
A4BY750 - 750Amp Fuse
Protect your electrical systems and keep them running smoothly with the Mersen A4BY750 Amp-Trap® Class L Time-Delay Fuse. Designed for medium to high-current applications, this 750A fuse is perfect for service entrance equipment, feeder circuits, and circuit breakers. Its clever time-delay design lets harmless surges—like motor starts or short voltage spikes—pass without tripping, while instantly reacting to real faults to protect your equipment and minimize downtime.
Installation is simple with silver-plated copper blade terminals and a bolt-mounted design. The tough glass melamine (GMG) body holds up under continuous heavy use, and a 200kA AC interrupting rating provides reliable protection for both commercial and industrial environments. Clear markings make it easy to identify and replace, saving time and effort for technicians and electricians.
Key Features and Benefits
- Time-delay design lets harmless surges pass without trips
- 750A rating for medium to high-current circuits
- Rated for 600VAC / 300VDC applications
- 200kA AC interrupting capacity for quick fault clearing
- Silver-plated copper blade terminals for secure connections
- Durable GMG (glass melamine) body for long-lasting stability
- Continuous-duty operation at full amp rating
- Clear markings for easy identification and maintenance
- Bolt-mounted installation ensures a secure, stable fit
Technical Specifications
- Catalog Number: A4BY750
- Series: A4BY – Class L – Time-Delay
- Fuse Class: Class L
- Ampere Rating: 750A
- Voltage Rating: 600VAC / 300VDC
- Frequency: 50/60 Hz
- Speed/Characteristic: Time-Delay
- Mounting: Bolted
- Connection Type: Blade
- Connection Material: Silver-Plated Copper
- AC Max Interrupting Rating: 200kA
- Body Material: GMG (Glass Melamine)
- Product Diameter: 50.8 mm
- Product Length: 219.2 mm
- Product Weight: 1.6511 kg
Material Compliance and Certifications
- RoHS Compliant
- UL/CSA approved for low-voltage applications
- Meets industrial and commercial electrical protection standards
Where It Works Best
- The A4BY750 is ideal for systems that demand reliable surge tolerance and fast fault response:
- Service entrance panels
- Feeder circuits and distribution systems
- Industrial machinery protection
- Commercial power systems
- Circuit breakers in critical infrastructure
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Specifications
- Width:2.0
- Depth:2.0
- Height:8.625
- Amperes:750
- A.I.C. Rating & Volts:200 kA @ 600 V.AC
- Type:A4BY
- Additional Notes:Knife-Blade Style, Non-Indicating, Time-Delay, current-limiting Class L Fuse
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