Bussmann FRN-R-3 Dual Element Time Delay Fuse

The Bussmann FRN-R-3 Fusetron is a dual-element, time-delay, current-limiting fuse in the RK5 class, rated 3 A at both 250 VAC and 125 VDC, with an interrupting rating of 200 kA at 250 VAC and 20 kA at 125 VDC. It features a cylindrical body and a non-indicating design, making it suitable for installations where trip indication is not required. As part of the FRN-R family, this fuse tolerates inrush currents and short surges common in motors and power supplies while providing reliable protection to downstream circuitry. The energy-efficient FRN-R design aligns with Bussmann’s line of low-voltage fuses and is commonly used in industrial control panels and similar electrical installations where robust protection and quick fault clearing are essential. When selecting a replacement, ensure the 3 A rating matches the circuit’s protection needs and use FRN-R series holders or RK5 bases for proper mounting and compatibility.