Mersen RF Series Class H 250VAC Fast-Acting Renewable Fuse, 10kA

Mersen RF Series Class H Fast-Acting Renewable Fuse, 250VAC

The Mersen RF Series is a general-purpose Class H renewable fuse rated 250VAC and built for circuits where available short-circuit current does not exceed 10,000 amperes. With a Fast-Acting speed characteristic, brass connection/terminal material, and an FWGE body/insulating material, this fuse delivers dependable overcurrent protection for standard branch-circuit and equipment applications. The RF Series is offered with a choice of Type of Connection — Blade or Ferrule — so it can be matched to the fuse block or clip configuration already installed in the panel or switchboard. The renewable design lets maintenance teams restore protection quickly using RL series die-cut zinc replacement fuse links, available from 2 to 600 amperes across 31 ratings, without swapping out the entire fuse holder.

Key Features

• Fast-Acting Response: Class H fast-acting speed characteristic for reliable overcurrent interruption.
• Interrupt Rating: 10 kA AC maximum breaking capacity (I1), suitable for circuits with available short-circuit current up to 10,000 amperes.
• Voltage Rating: 250V AC rated (UL) for general-purpose branch-circuit protection.
• Type of Connection: Available in Blade or Ferrule configurations with brass connection/terminal material for secure, low-resistance contact.
• Frequency: Rated for 50/60 Hz AC systems.
• Durable Construction: FWGE body/insulating material for a rugged, long-lasting housing.
• Renewable Design: Compatible with RL series die-cut zinc replacement fuse links, available from 2 to 600 amperes in 31 ratings, minimizing downtime during maintenance.

Technical Specifications

• AC or DC: AC
• Type of Connection: Blade or Ferrule
• Connection/Terminal Material: Brass
• AC Max I.R./Breaking Capacity (I1): 10 kA
• Frequency: 50/60 Hz
• Speed/Characteristic: Fast-Acting
• Rated Voltage AC (UL): 250 V
• Fuse Class: Class H
• Body/Insulating Material: FWGE

Typical Applications

• General-Purpose Branch Circuit Protection
• Commercial and Industrial Electrical Panels
• Motor and Feeder Circuit Overcurrent Protection
• Renewable Fuse Panelboards and Switchboards
• Maintenance Replacement Using RL Series Fuse Links

Why Mersen?

Mersen RF Series Class H renewable fuses combine a durable FWGE body, brass terminal connections, and a fast-acting speed characteristic to deliver consistent, code-compliant overcurrent protection for general-purpose electrical systems. Offered in Blade and Ferrule connection styles, the RF Series fits a wide range of existing fuse holders while its renewable clip design paired with RL series replacement fuse links lets facilities maintain protection across a wide span of ratings without replacing the entire fuse holder. That combination of flexibility and durability makes Mersen a practical choice for professional electrical maintenance and construction work.