Mersen A4BQ4000 Class L Time-Delay Fuse – 4000A – 600VAC – Amp-Trap 2000® Blade Fuse

The Mersen A4BQ4000 is an ultra-high capacity Amp-Trap 2000® Class L time-delay fuse engineered for large-scale industrial, utility, and critical power distribution systems. Rated at 4000 Amps, this fuse provides time-delay performance to withstand high motor starting currents and transformer inrush while delivering rapid current-limiting protection under short-circuit conditions. With a voltage rating of 600VAC, it is designed for main service entrances, switchgear, and heavy-duty feeder protection in high-energy electrical networks.

Voltage and Rating

• Current Rating: 4000 Amps
• Voltage Rating: 600VAC
• Frequency: 50/60 Hz
• Fuse Class: Class L
• Fuse Type: Time-Delay, Current-Limiting
• RoHS Compliant: Yes

Key Specifications

• Product Type: Industrial Power Fuse
• Series: Amp-Trap 2000® A4BQ
• Part Number: A4BQ4000
• Manufacturer: Mersen / Ferraz Shawmut
• Mounting Style: Blade
• Time-Delay Capability: Yes (motor and transformer inrush tolerance)
• Current Limiting: Yes

Technical Specifications

• Protection Type: Overcurrent and short-circuit protection
• Application Suitability: Main service protection, large feeders, transformers, switchgear, and industrial distribution systems
• Coordination Type: Selective coordination for high fault current networks
• Construction Features: Very high interrupting capacity, low let-through energy, robust industrial-grade construction
• System Integration: Designed for utility-scale and heavy industrial power systems

Standards and Approvals

• UL Listed
• CSA Certified
• Compliant with Class L high-capacity fuse protection standards
• RoHS Compliant

Product Data

• Manufacturer: Mersen / Ferraz Shawmut
• Series: Amp-Trap 2000®
• Part Number: A4BQ4000
• EAN/UPC: 782001930172

Applications

• Utility-scale power distribution systems
• Industrial main service entrance protection
• Large transformer protection
• Heavy-duty feeder circuits
• Switchgear and switchboard assemblies
• Critical infrastructure electrical systems
• High fault current environments
• Large manufacturing and energy facilities

Returns are easy

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

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