Mersen A4J225 Class J Fast-Acting Fuse – 225A – 600VAC/300VDC – Amp-Trap® Blade Fuse

The Mersen A4J225 is an Amp-Trap® Class J fast-acting fuse engineered for high-performance protection of industrial and commercial power distribution systems. Rated at 225 Amps, this current-limiting fuse provides rapid response to short-circuit conditions, delivering superior protection for sensitive equipment, feeders, and branch circuits. With voltage ratings of 600VAC and 300VDC, it is designed for use in compact Class J fuse systems where high interrupting capacity and fast clearing performance are required.

Voltage and Rating

• Current Rating: 225 Amps
• Voltage Rating: 600VAC / 300VDC
• Frequency: 50/60 Hz
• Fuse Class: Class J
• Fuse Type: Fast-Acting, Current-Limiting

Key Specifications

• Product Type: Industrial Power Fuse
• Series: Amp-Trap® A4J
• Part Number: A4J225
• Manufacturer: Mersen / Ferraz Shawmut
• Mounting Style: Blade
• Response Type: Fast-Acting (non-time-delay)
• Current Limiting: Yes

Technical Specifications

• Protection Type: Short-circuit and overcurrent protection (fast response)
• Application Suitability: Feeders, branch circuits, control panels, industrial distribution systems, and motor circuits requiring fast protection
• Coordination Type: Designed for selective coordination with downstream devices in Class J systems
• Construction Features: High interrupting rating, compact footprint, low let-through energy
• System Integration: Suitable for high-density industrial electrical panels

Standards and Approvals

• UL Listed
• CSA Certified
• Compliant with Class J fuse standards

Product Data

• Manufacturer: Mersen / Ferraz Shawmut
• Series: Amp-Trap® A4J
• Part Number: A4J225
• EAN/UPC: 782001960384

Applications

• Industrial power distribution systems
• Branch circuit protection
• Feeder circuit protection
• Control panels and MCCs
• Motor circuit protection (fast-acting requirements)
• Switchboards and switchgear assemblies
• Commercial electrical installations

Returns are easy

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

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