Mersen A6K400R Fuse – Class RK1 – 400A – 600VAC/300VDC – Fast-Acting Blade Fuse (Amp-Trap® A6K-R)

The Mersen A6K400R is a Class RK1 fast-acting fuse engineered for high-performance protection of industrial electrical systems. Rated at 400 Amps, this Amp-Trap® fuse provides rapid fault interruption to protect conductors, switchgear, and sensitive downstream equipment from damaging short-circuit conditions. With voltage ratings of 600VAC and 300VDC, it is suitable for both AC and DC applications requiring fast and reliable circuit protection.

Voltage and Rating

• Current Rating: 400 Amps
• Voltage Rating: 600VAC / 300VDC
• Frequency: 50/60 Hz
• Fuse Class: Class RK1
• Fuse Type: Fast-Acting (Fast-Blow)

Key Specifications

• Product Type: Industrial Fast-Acting Fuse
• Series: Amp-Trap® A6K-R
• Part Number: A6K400R
• Manufacturer: Mersen
• Mounting Style: Blade
• Response Type: Fast-acting for immediate fault clearance
• Performance Class: RK1 high interrupting capacity

Technical Specifications

• Protection Type: Overcurrent and short-circuit protection for industrial circuits
• Application Suitability: Power distribution systems, feeders, motor branch circuits, and industrial equipment
• Coordination Type: Designed for selective coordination with downstream protective devices
• Construction Features: High interrupting rating, low let-through energy, and robust blade construction
• System Integration: Compatible with AC and DC systems up to rated voltage limits

Standards and Approvals

• UL Listed
• CSA Certified
• Class RK1 industrial fuse standard compliant
• IEC equivalent industrial protection standards (where applicable)

Product Data

• Manufacturer: Mersen
• Series: Amp-Trap® A6K-R
• Part Number: A6K400R
• EAN/UPC: 782001915889

Applications

• Industrial power distribution panels
• Motor control and branch circuit protection
• Electrical feeders and sub-feeders
• HVAC and compressor systems
• Heavy-duty industrial machinery
• Switchgear and control panels
• Commercial and manufacturing facilities
• Equipment requiring fast and reliable fault protection

Returns are easy

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

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