Mersen 2661 600A Class H/K Fuse Block, Copper Box In-Line Clip

Mersen 2661 600A Class H/K Fuse Block, Copper Box In-Line Clip

The Mersen 2661 Class H/K Fuse Block series is engineered to accommodate Class H and K power fuses rated 250V AC and 250V DC, with a maximum fuse rating of 600A for demanding industrial and commercial circuits. This fuse block family is available in 1-Pole and 3-Pole configurations, letting you match the block to single-phase or three-phase distribution needs while sharing the same core electrical and mechanical specifications. Built with copper box terminals and tin-plated copper in-line clips, every pole configuration in this line delivers reliable, low-resistance connections for stranded or solid copper wire. A 50kA short circuit current rating (SCCR) and phenolic insulating body with dielectric strength verified in excess of 2500V make these blocks suited for rugged, code-compliant power distribution applications across the full 1 to 3 pole range.

Key Features

• Pole Configuration: Available in 1-Pole and 3-Pole versions to match single-phase or three-phase circuit layouts.
• Max Fuse Rating: 600A ampere rating for high-capacity circuit protection across all pole options.
• Rated Voltage: 250V AC and 250V DC per UL, supporting both AC and DC power systems.
• Connection/Terminal Type: Copper box terminals with tin-plated copper in-line clips for durable, corrosion-resistant connections.
• Wiring Range: Accommodates (2) 500 MCM-#4 stranded or solid copper wire per pole.
• Fuse Installation Method: Clip-in style; clips 100A and above are spring reinforced for a secure fuse seat.
• Short Circuit Current Rating: 50kA SCCR for demanding fault-current environments.
• Body/Insulating Material: Phenolic insulation with dielectric strength verified in excess of 2500V.
• Torque Rating: 375 lb-in for direct screw mount installation.

Certifications & Compliance

• Rated Voltage AC and DC per UL
• RoHS Compliant

Technical Specifications

• Rated voltage AC UL: 250 V
• Rated voltage DC UL: 250 V
• Short Circuit Current Rating (SCCR): 50 kA
• Max Fuse Rating: 600 A
• Ampere Rating: 600 A
• ROHS Compliant: Yes
• Fuse Type/Class: Class H/K
• Frequency: 50/60 Hz
• AC or DC: AC/DC
• Installation Mounting: Direct Screw Mount
• Packaging: 1 EA

Typical Applications

• Industrial and Commercial Power Distribution Panels
• Fuse Panel and Disconnect Switch Assemblies
• Motor Control Center Circuit Protection
• Single-Phase and Three-Phase 250V AC/DC Class H/K Fuse Mounting Systems
• Renovation and New Construction Electrical Rooms

Why Mersen?

Mersen fuse blocks combine tin-plated copper box terminals, phenolic insulation, and a 50kA short circuit current rating to deliver dependable, code-compliant power protection across the full 1-Pole to 3-Pole lineup. With UL-rated 250V AC/DC performance and RoHS compliant construction, these fuse blocks are built for reliable long-term performance in demanding electrical distribution applications.