Bussmann FRN-R Series Dual-Element Time-Delay Fuse, Class RK5

Bussmann FRN-R Series Dual-Element Time-Delay Fuse, Class RK5

The Bussmann FRN-R Series Dual-Element Time-Delay Fuse, Class RK5 delivers dependable overcurrent protection for branch circuits, motor loads, and control circuits, and is available in 3A, 4A, and 6A ratings to match your application. This Dual Class RK5 fuse features a non-indicating design with ferrule end x ferrule end terminals for straightforward installation in standard fuse holders and disconnects. Rated 250V and 125Vdc (Standard), it delivers an interrupting rating of 200 kAIC at 250V and 20 kAIC at 125Vdc, with a time-delay opening characteristic of 8 seconds at 500% of rated current to ride through harmless inrush and motor starting surges. Backed by CE Marking, the FRN-R Series is engineered for reliable, code-compliant overcurrent protection in commercial and industrial electrical systems.

Key Features

• Amp Ratings: Available in 3A, 4A, and 6A to cover a range of branch-circuit and control-circuit protection needs.
• Dual-Element Time-Delay Design: Class RK5 construction opens in 8 seconds at 500% of rated current, allowing motors and other inductive loads to start without nuisance fuse operation.
• High Interrupting Capacity: Rated 200 kAIC at 250V and 20 kAIC at 125Vdc for safe interruption of high fault currents.
• Dual Voltage Rating: Standard rating of 250V and 125Vdc supports both AC and DC circuit applications.
• Ferrule End Terminals: Ferrule end x ferrule end configuration for compatibility with standard ferrule-type fuse blocks and holders.
• Non-Indicating Construction: Streamlined, non-indicating body design suited to standard overcurrent protection applications.

Certifications & Compliance

• CE Marked

Technical Specifications

• Voltage Rating: 250 Vac, 125 Vdc
• Compliances: CE Marked
• Product Type: Time Delay Fuses

Typical Applications

• Branch Circuit Overcurrent Protection
• Motor and Motor Control Circuit Protection
• Control Panel and Panelboard Fuse Protection
• Commercial and Industrial Electrical Systems
• Renovation, Retrofit, and New Construction Fuse Replacement

Why Bussmann?

Bussmann by Eaton is a recognized name in circuit protection, and the FRN-R Series Class RK5 dual-element fuse reflects that reputation with a 200 kAIC interrupting rating, dual 250V/125Vdc rating, and CE Marked compliance. Its time-delay characteristic and ferrule end design make it a reliable choice for electrical professionals who need consistent, code-compliant overcurrent protection across 3A, 4A, and 6A ratings.