Bussmann FRS-R 300 Amp fuse 600 V

Bussmann FRS‑R 300 Amp fuse – Class RK5 time‑delay cartridge rated 300 A, 600 VAC/300 VDC, dual‑element for motor circuits with 200 kA interrupt capacity.

Description

Bussmann FRS‑R 300 Amp fuse – high‑capacity protection for industrial systems

The Bussmann FRS‑R 300 Amp fuse is a robust Class RK5 cartridge fuse engineered for industrial motor protection, heavy-duty feeders, and emergency power systems. Its dual-element, time-delay, current-limiting design provides superior protection by tolerating motor inrush currents while swiftly interrupting dangerous short-circuits.

Premium protection features:

Dual-element time‑delay: holds for at least 10 seconds at 500% of rated current, minimizing nuisance tripping during motor starts
Current-limiting design: reduces fault current to protect downstream components
600 VAC / 300 VDC voltage rating ensures versatile use
Interrupting rating: 200 kA @ 600 VAC; 20 kA @ 300 VDC

🔧 Technical Specifications

Feature	Specification
Current rating	300 A
Voltage	600 VAC / 300 VDC
Class	RK5 (UL 248‑12)
Interrupt rating	200 kA AC / 20 kA DC
Time‑delay	10 s at 500% load
Length	11.63 in (±0.094″)
Diameter	2.34 in
Weight	~0.40 lb
Body	Fiberglass cartridge with blade ends