Bussmann BP/FRN-R-100 100A Time-Delay Cartridge Fuse – Motor Protection | FRN-R RK5

Overview

The Bussmann BP/FRN-R-100 fuse is a robust, heavy‑duty time‑delay cartridge fuse designed to guard motors and main panels. Part of Eaton Bussmann's advanced protection lineup, it blends dependable performance with energy‑efficient operation for industrial and commercial applications.

Core advantages

• Heavy‑duty, dual‑element, time‑delay design protects motors during startup surges and overloads
• Extremely fast short‑circuit response — opens in as little as 0.004 seconds
• UL Listed Class R (IR: 200 kA) with grooves/notches to fit Class H, K, or R fuse blocks
• Suitable for higher amps and voltages up to 600 VAC and 600 A
• Supports selective coordination to reduce outages and simplify protection strategies
• Time‑delay lets short motor overloads pass before protection actuates

Applications and sizing

• Ideal for protecting motors in commercial, industrial, and agricultural equipment
• Used in circuits requiring higher amp or volt ratings; available in various sizes and ratings
• General purpose fuses protect lighting or heating circuits; heavy‑duty fuses provide motor protection
• Open fuse indication is available on select ratings

Physical details and timing notes: this is a 100 A fuse with a compact form factor of about 2.1 inches long and 0.54 inches in diameter. The time‑delay rating is 10 seconds minimum at 500% of rated current (8 seconds for 1/10–30 A sizes). The design includes a groove in the end cap or a notch in the knife blade to support use in Class H, K, or R fuse blocks.