Mersen A6K300R Fuse – Class RK1 – 300A – 600VAC/300VDC – Fast-Acting Blade Fuse (Amp-Trap® A6K-R)

The Mersen A6K300R is a Class RK1 fast-acting fuse designed for high-performance overcurrent and short-circuit protection in industrial power distribution systems. Rated at 300 Amps, this Amp-Trap® fuse delivers rapid fault interruption to protect electrical conductors, switchgear, and downstream equipment from damage caused by short-circuit conditions. With voltage ratings of 600VAC and 300VDC, it is suitable for both AC and DC applications requiring reliable and fast protective response.

Voltage and Rating

• Current Rating: 300 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: A6K300R
• Manufacturer: Mersen
• Mounting Style: Blade
• Response Type: Fast-acting for immediate fault clearing
• Performance Class: RK1 high interrupting capacity

Technical Specifications

• Protection Type: Overcurrent and short-circuit protection for industrial circuits
• Application Suitability: Feeders, branch circuits, motor control systems, and industrial machinery
• Coordination Type: Designed for selective and fast protection coordination
• Construction Features: High interrupting rating, low let-through energy, and durable blade design
• System Integration: Suitable for AC and DC distribution 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: A6K300R
• EAN/UPC: 782001915858

Applications

• Industrial power distribution panels
• Motor branch circuit protection
• Electrical feeders and sub-feeders
• HVAC systems and compressors
• Heavy-duty industrial machinery
• Control panels and switchgear
• Commercial and manufacturing facilities
• Systems requiring fast fault clearance 

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.