Overview
The Bussmann FRS-R-2/10 Class RK5 fuse is a dual-element, time-delay Fusetron cartridge fuse engineered for reliable protection in industrial motor circuits and branch circuit applications. This 2/10A, 600V fuse combines a separate overload element with a short-circuit element to deliver coordinated protection with minimal nuisance trips.
Key Features
- Dual-element time-delay design allows selective coordination within the RK5 fuse family
- Rated 2/10A (0.2A) at 600Vac/300Vdc for versatile industrial use
- 200 kA interrupting rating at 600Vac; 20 kA at 300Vdc for short-circuit containment
- 8-second minimum time-delay at 500% of rated current—ideal for motor starting
- Separate overload and short-circuit elements enable tight motor FLA sizing (125% minimum)
- UL Class R recognized and CSA certified for North American compliance
Technical Specifications
- Current Rating: 2/10 Amp (0.2A)
- Voltage: 600Vac / 300Vdc
- Fuse Class: RK5 (Class R)
- Type: Dual-Element Time-Delay (Fusetron)
- Interrupting Rating: 200 kA @ 600Vac; 20 kA @ 300Vdc
- Time-Delay: 8 seconds minimum at 500% rated current
- Dimensions: 0.81″ Diameter × 5.0″ Length
- UL Recognized: Class R Branch Circuit Fuse
- CSA Certified: Yes
Typical Applications
- Small motor branch circuits requiring soft-start protection
- Precision machinery and control equipment circuits
- HVAC equipment with transient inrush current demands
- Industrial process control and automation systems
- Commercial lighting and distribution panels
Compatibility & Replacements
Compatible With
- Standard Class R fuse holders and blocks
- Industrial control systems requiring UL Class R protection
- 600V single-phase and three-phase branch circuits
- Motor starters and soft-start controllers
Replaces / Drop-In Replacement For
- Bussmann FRS-R-2/10 (direct equivalent)
- Other Class RK5 time-delay fuses in equivalent ratings
- Legacy dual-element branch circuit fuses rated 2/10A 600V
Works With
- Class R fuse blocks and cartridge holders
- Selective coordination systems within the RK5 family
- Motors rated up to approximately 1/8 HP (typical for 0.2A protection)
- Industrial electrical distribution systems 600V and below
