A4BY3000 - 3000Amp Fuse Description
A4BY3000 - 3000Amp Fuse
When it comes to protecting high-current electrical systems, the Mersen A4BY3000 Amp-Trap® Class L Time-Delay Fuse has you covered. Rated at 3000 amps, this heavy-duty fuse is perfect for service entrance equipment, feeder circuits, and large circuit breakers. Its clever time-delay design allows harmless surges—like motor starts or short spikes—to pass without tripping, but reacts immediately when a real fault occurs. That means your equipment stays safe, and you avoid costly downtime.
Installation is straightforward thanks to silver-plated copper blade terminals, and the tough glass melamine (GMG) body keeps its shape even under continuous heavy loads. With a 200kA AC interrupting rating, the A4BY3000 handles the most demanding industrial and commercial conditions with confidence. Easy-to-read markings make maintenance simple, so you can quickly identify and replace the fuse without any guesswork.
Key Features and Benefits
- Handles harmless surges without tripping thanks to time-delay design
- 3000A rating for high-current circuits and service entrances
- Rated for 600VAC / 300VDC applications
- 200kA AC interrupting capacity protects against serious faults
- Silver-plated copper blade terminals for secure, reliable connections
- Durable GMG (glass melamine) body holds up under heavy use
- Continuous-duty at full ampere rating
- Clear markings make maintenance quick and easy
- Bolt-mounted installation ensures a stable fit
Technical Specifications
- Catalog Number: A4BY3000
- Series: A4BY – Class L – Time-Delay
- Fuse Class: Class L
- Ampere Rating: 3000A
- 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)
- Diameter: 127 mm
- Length: 273 mm
- Product Weight: 8.7543 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 A4BY3000 shines in environments that demand high-current protection and reliable surge tolerance:
- Service entrance panels
- Feeder circuits and distribution systems
- Industrial machinery protection
- Commercial power systems
- Critical circuit breakers in essential infrastructure
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Specifications
- Width:4.0
- Depth:4.0
- Height:10.75
- Amperes:3000
- 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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