Mersen 20355 Class H/K Fuse Block Adder, Copper Box Connector

Mersen 20355 Class H/K Fuse Block Adder, Copper Box Connector, 250VAC/250VDC

The Mersen 20355 Class H/K fuse block adder is engineered to accommodate Class H, K and R power fuses rated up to 250V, with a UL rated voltage of 250V AC and 250V DC for versatile AC/DC circuit protection. Available for motor FLA ratings from 30A to 60A, this adder block snaps onto 1-, 2- or 3-pole fuse blocks to build multipole segmented assemblies of as many poles as your application requires, using a copper box connector to terminate stranded or solid copper wire. Rated for 50/60 Hz operation and installed via direct screw mount, this fuse block adder is built with a glass-filled polycarbonate body for verified dielectric strength and is RoHS compliant for modern electrical infrastructure projects.

Key Features

• Modular Adder Design: Snaps onto 1-, 2- or 3-pole fuse blocks to form multipole segmented blocks of as many poles as desired.
• Motor FLA Range: Offered across 30A and 60A ratings to match a range of Class H, K and R fuse installations.
• Durable Construction: Glass-filled polycarbonate (GFPC) insulating body delivers verified dielectric strength in excess of 2500V.
• Copper Box Connector: Box-style copper terminal accepts a wide range of stranded or solid copper wire.
• Dual Voltage Rating: UL rated for 250V AC and 250V DC, supporting both AC and DC circuit applications.
• 50/60 Hz Frequency: Compatible with standard 50/60 Hz power systems.
• Direct Screw Mount: Installation mounting simplifies integration into panelboards and fuse assemblies.
• Clip-In Fuse Installation: High conductivity tinplated copper fuse clips allow quick clip-in fuse installation.

Certifications & Compliance

• RoHS Compliant
• UL Rated Voltage: 250V AC / 250V DC

Technical Specifications

• ROHS Compliant: Yes
• Rated Voltage AC UL: 250V
• Rated Voltage DC UL: 250V
• Motor FLA: 30A - 60A
• Installation Mounting: Direct Screw Mount
• Frequency: 50/60 Hz
• AC or DC: AC/DC
• Fuse Installation Method: Clip-in
• Body/Insulating Material: Glass Filled Polycarbonate
• Packaging: 10 EA

Typical Applications

• Commercial and Industrial Electrical Panelboards
• Multipole Fuse Block Assemblies
• Class H, K and R Power Fuse Installations
• AC and DC Circuit Protection Systems
• Panel Retrofits and New Panel Construction

Why Mersen?

Mersen fuse blocks combine a glass-filled polycarbonate insulating body with verified dielectric strength and high conductivity tinplated copper clips for dependable, code-compliant fuse protection. The modular adder design and copper box connector give installers flexibility to build multipole assemblies from a common component base across 30A to 60A motor FLA ratings, while RoHS compliance and dual 250V AC/DC UL ratings support reliable performance across commercial and industrial electrical systems.