Overview
The Bussmann FRS-R-200 is a UL-listed, Class RK5 dual-element time-delay fuse designed for industrial branch circuits and motor protection applications. Operating at 200A, 600V AC (300V DC), this current-limiting cartridge fuse provides energy-efficient overcurrent protection with a 10-second minimum time-delay at 500% rated current, allowing brief inrush currents from motors and transformers while protecting against sustained faults.
Key Features
- Dual-element construction provides thermal and magnetic protection layers
- 10-second minimum time-delay at 500% rated current—sized close to full-load amps for maximum protection
- Current-limiting technology reduces peak let-through current, protecting downstream equipment
- Renewable cartridge design reduces maintenance costs and downtime
- Blade-end terminals; simple holder-mount installation
- UL 248-12 and CSA C22.2 certified for North American compliance
Technical Specifications
- Voltage Rating: 600 VAC / 300 VDC
- Current Rating: 200 Amps
- Interrupt Rating: 200 kA (AC RMS symmetrical) / 20 kA (DC)
- Class: RK5
- Response Time: 10 seconds minimum at 500% rated current
- Fuse Type: Dual-element, time-delay (slow-blow)
- Diameter: 1.61 inches
- Length: 9.63 inches
- Body Material: Fiberglass
- Weight: 1.03 lb
- Terminal Type: Blade-end, holder mount
- UL Standard: UL 248-12
- CSA Standard: CSA C22.2
Typical Applications
- Motor branch circuits and motor starters (up to 125 HP at 600V)
- Transformer protection and feeders
- Industrial control circuits with inductive loads
- Machinery and equipment with surge currents
- General distribution panels and switchgear
Compatibility & Replacements
Compatible With
- UL Class RK5 fused disconnect switches and holders
- 600V AC distribution panels and switchboards
- Standard cartridge fuse holders with blade-terminal receptacles
- Motor control centers (MCCs) rated 600V
- Industrial machinery with 200A branch circuit protection requirements
Replaces / Drop-In Replacement For
- Bussmann FRS-200 (original designation)
- Cooper Bussmann FRS-R-200
- Eaton Bussmann FRS-R-200
- Other Class RK5 200A 600V dual-element time-delay fuses of equivalent physical dimensions
Works With
- Standard cartridge fuse holders and fuseholders per UL 1077
- 600V AC industrial control systems
- Motor starting circuits and soft-starter protection
- Power distribution equipment requiring Class RK5 protection
