Bussmann FRN-R Series Fusetron Time-Delay Fuse, 250V

Bussmann FRN-R Series Fusetron Time-Delay Fuse, 250V

The Bussmann FRN-R Series Fusetron Time-Delay Fuse is a 250V overcurrent protection device engineered to deliver dependable, code-compliant circuit protection across a wide range of amperage ratings. This family is available in ratings from 1.8 Amp to 75 Amp, giving electrical contractors and maintenance professionals a single trusted platform for protecting everything from small control circuits and instrumentation to larger branch-circuit and distribution loads. Every fuse in the FRN-R Fusetron line shares the same 250V rating and time-delay construction, so the correct amperage can be selected to match the specific application while relying on consistent, field-proven performance across the entire series.

Key Features

• Amperage Rating Range: Available from 1.8 Amp through 75 Amp, allowing precise selection for control transformers, instrumentation, low-current branch circuits, and higher-load panelboard and distribution applications.
• Voltage Rating: Rated 250V, suited to standard low-voltage electrical distribution and branch-circuit applications common in commercial, industrial, and residential systems.
• Fusetron Series Design: Manufactured as part of the Bussmann Fusetron line, this family is built for the dependable, repeatable performance the Fusetron name is known for in the field.
• Time-Delay Performance: Every rating in the FRN-R Fusetron family is engineered to tolerate momentary current surges, such as motor-starting inrush current, while still opening promptly under sustained overcurrent conditions to protect connected equipment.
• FRN-R Model Family: Identified by the FRN-R model designation across all amperage options, allowing electricians and facility teams to cross-reference and order the correct fractional or whole-amp replacement with confidence.
• Bussmann Manufacturing: Produced by Bussmann, a long-established manufacturer of fuses and overcurrent protection devices used throughout commercial, industrial, and residential electrical systems.

Technical Specifications

• Series: FRN-R Fusetron
• Voltage Rating: 250V
• Amperage Options: 1.8 Amp, 4.5 Amp, 5.6 Amp, 75 Amp (select the rating required for your application)
• Refer to manufacturer documentation for complete technical specifications.

Typical Applications

• Overcurrent protection for low-current and higher-load electrical branch circuits
• Control circuit and control transformer primary protection
• Panelboard and electrical distribution equipment
• Exact replacement fuse for OEM and aftermarket electrical equipment specifying an FRN-R Fusetron rating
• Commercial and industrial electrical protection applications

Why Bussmann?

Bussmann has built a strong reputation in the electrical industry for fuses and overcurrent protection products, and the Fusetron series reflects that reputation through its time-delay construction and consistent field performance across every amperage in the FRN-R family. The shared 250V rating paired with the broad 1.8 Amp to 75 Amp range makes this series well suited to applications where an exact, code-compliant fuse match matters. Choosing a genuine Bussmann Fusetron fuse from the FRN-R family helps ensure circuits, control equipment, and connected devices receive the level of overcurrent protection they were designed for, regardless of which amperage rating the application requires.