Mersen RL Class H Fast-Acting Renewable Fuse, 250V AC

Mersen RL Class H Fast-Acting Renewable Fuse

The Mersen RL Class H Fast-Acting Renewable Fuse is a general purpose fuse designed for applications where available short-circuit currents do not exceed 10,000 amperes. This Class H fuse line is rated 250V AC (UL), built for 50/60 Hz AC systems, and is available in Motor FLA amperage ratings ranging from 3A to 400A across 21 options, allowing electricians and maintenance crews to size protection precisely to the branch-circuit or equipment load. Each fuse uses a fast-acting renewable link, meaning the fuse body itself can be reused with a fresh RL series die-cut zinc replacement link rather than discarded after every operation, and RL series replacement links are available from 2 to 600 amperes across 31 ratings for fast restoration of protection.

Key Features

• Amperage Range: Available in Motor FLA ratings from 3A to 400A (21 options) to match specific branch-circuit and motor protection requirements.
• Fuse Class: Class H general purpose fuse construction for standard branch-circuit and equipment protection.
• Speed/Characteristic: Fast-Acting link responds quickly to overcurrent conditions for reliable circuit protection.
• Rated Voltage: 250V AC (UL) rated for standard commercial and industrial AC distribution systems.
• Frequency: Rated for 50/60 Hz AC power, suitable for standard North American electrical systems.
• Renewable Link Design: Accepts RL series die-cut zinc replacement links from 2 to 600 amperes in 31 ratings, allowing the fuse holder to be reloaded instead of fully replaced after an operation.
• Short-Circuit Application Range: Suitable for applications where available short-circuit currents do not exceed 10,000 amperes.
• AC or DC: AC-rated fuse for alternating current circuits.

Technical Specifications

• AC or DC: AC
• Frequency: 50/60 Hz
• Rated Voltage AC (UL): 250 V
• Speed/Characteristic: Fast-Acting
• Fuse Class: Class H
• Motor FLA Range: 3A to 400A (21 options)

Typical Applications

• General Purpose Branch-Circuit Overcurrent Protection
• Commercial and Industrial Electrical Panels
• Motor and Equipment Circuit Protection
• Renewable Fuse Holder Systems Requiring Periodic Link Replacement
• Systems with Available Short-Circuit Currents Up to 10,000 Amperes

Why Mersen?

Mersen builds the RL Class H fuse around a renewable link design, letting facilities restore fast-acting overcurrent protection with an RL series die-cut zinc replacement link instead of sourcing a whole new fuse for every operation. With a 250V AC (UL) rating, 50/60 Hz compatibility, Motor FLA ratings spanning 3A to 400A, and Class H construction sized for short-circuit currents up to 10,000 amperes, this fuse line supports dependable, code-compliant protection across a wide range of commercial and industrial electrical applications.