Mersen A4BQ1000 Class L Time-Delay Fuse – 1000A – 600VAC/500VDC – Amp-Trap 2000® Blade Fuse

The Mersen A4BQ1000 is a high-capacity Amp-Trap 2000® Class L time-delay fuse engineered for heavy-duty industrial and commercial power distribution systems. Rated at 1000 Amps, this current-limiting fuse provides time-delay performance to safely handle motor starting currents and transformer inrush while delivering strong short-circuit protection. With voltage ratings of 600VAC and 500VDC, it is designed for main feeder protection, service entrance equipment, and high-energy electrical distribution systems requiring reliable coordination and high interrupting capacity.

Voltage and Rating

• Current Rating: 1000 Amps
• Voltage Rating: 600VAC / 500VDC
• Frequency: 50/60 Hz
• Fuse Class: Class L
• Fuse Type: Time-Delay, Current-Limiting

Key Specifications

• Product Type: Industrial Power Fuse
• Series: Amp-Trap 2000® A4BQ
• Part Number: A4BQ1000
• Manufacturer: Mersen / Ferraz Shawmut
• Mounting Style: Blade
• Time-Delay Capability: Yes (motor/inrush tolerant)
• Current Limiting: Yes

Technical Specifications

• Protection Type: Overcurrent and short-circuit protection
• Application Suitability: Main electrical service, feeders, transformers, large motors, and distribution panels
• Coordination Type: Selective coordination with downstream protection devices
• Construction Features: High interrupting capacity, low let-through energy, robust industrial design
• System Integration: Designed for high-energy industrial distribution networks

Standards and Approvals

• UL Listed
• CSA Certified
• Conforms to Class L fuse requirements for high-current protection systems

Product Data

• Manufacturer: Mersen / Ferraz Shawmut
• Series: Amp-Trap 2000®
• Part Number: A4BQ1000
• EAN/UPC: 782001939380

Applications

• Main electrical service protection
• Industrial power distribution systems
• Large motor protection
• Transformer protection
• Feeder circuit protection
• Commercial and industrial switchboards
• Critical infrastructure power systems
• High fault current environments
• Heavy-duty electrical panels

Returns are easy

You may return items within 30 days of delivery for a refund.

FREE Shipping on orders over $149.

My Circuit Breakers offers one to five day delivery in the United States. The variation depends on the chosen shipping speed and the warehouse location for the product(s).

Same Day Shipping

We strive to ship out your items within one business day.

In rare circumstances, My Circuit Breakers may reserve up to 5 business days to complete shipment. Feel free to contact us if your order is time sensitive.

My Circuit Breakers provides a comprehensive 1-year warranty on both new and reconditioned products. Rest assured, all products are authentic OEM (original equipment manufacturer). Extended warranties are available upon request.