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Bussmann Fusetron cartridge fuses deliver reliable electrical protection for residential and commercial power distribution systems. These dual-element, time-delay fuses are engineered to safeguard branch circuits, feeders, motors, transformers, and lighting loads while allowing brief current surges to pass without unnecessary nuisance trips. The Class RK5 design offers superior protection against overloads and short circuits.
The time-delay feature is essential for motor circuits, where startup inrush current is normal and expected. Unlike fast-acting fuses that blow during routine motor startup, Fusetron fuses allow the initial surge to pass through while remaining vigilant against sustained dangerous overloads that could cause motor burnout or create fire hazards. An indicating label on each fuse darkens visibly when the fuse has opened, making it easy to identify a blown fuse at a glance without guesswork.
Features and Benefits
- Dual-Element Time-Delay Design: Permits temporary inrush currents typical of motor startup while protecting against prolonged overloads and short circuits.
- Class RK5 Rating: Provides current-limiting protection with a 200 kA interrupting rating at 250 VAC and 20 kA at 125 VDC, suitable for a broad range of applications.
- Indicating Fuse: The label darkens when the fuse opens, offering instant visual confirmation of a blown fuse.
- UL Listed: Meets rigorous Underwriters Laboratories safety standards for reliable performance.
- Superior Motor Protection: When properly sized, helps prevent motor burnout and single-phasing damage on inductive loads.
Specifications
- Brand: Bussmann
- Model: BP/FRN-R-20ID
- Amperage: 20 Amp
- Voltage: 250V
- Type: Dual-element, time-delay, indicating cartridge fuse
- Class: RK5
- Dimensions: 2.375" L × 1.375" W × 0.25" H
- Count: 2-pack
- UL Listed