Overview
The Bussmann FRS-R-175 is a Fusetron Class RK5 dual-element, time-delay fuse designed for demanding industrial motor and automation control circuits. This current-limiting renewable fuse combines 10-second overload tolerance at 500% rated current with fast short-circuit protection, delivering 200 kA interrupting rating at 600VAC.
Key Features
- Dual-element construction tolerates temporary motor inrush and surge currents while protecting against sustained overloads
- Current-limiting design reduces arcing energy and equipment damage during faults
- Renewable cartridge allows field replacement within standard holders without changing equipment wiring
- Class RK5 rejection-type ensures compatibility with listed fuseholders and prevents misapplication
- UL 248-12, CSA, and CE certified for safety-critical industrial installations
- Non-indicating blade-terminal cartridge fits standard motor-rated fuseholders
Technical Specifications
- Fuse Rating: 175 Amperes
- Voltage Rating: 600VAC, 300VDC
- Interrupting Rating: 200 kA (600VAC symmetrical), 20 kA (300VDC)
- Response Time: 10 seconds minimum at 500% of rated current
- Class: RK5 (Rejection Type)
- Element Type: Dual-element, current-limiting
- Physical Size: 1.61 in (41 mm) diameter × 9.63 in (244.6 mm) length
- Terminal Type: Blade-end renewable cartridge
- Body Material: Fiberglass
- Approvals: UL 248-12, CSA, CE
- Series: Bussmann Fusetron FRS-R
Typical Applications
- AC motor branch circuits and feeder protection
- HVAC and chiller equipment control
- Pump and compressor motor protection
- Industrial automation PLC and VFD supply protection
- Heavy-duty machine tool and conveyor circuits
- Emergency lighting and backup power systems
Compatibility & Replacements
Compatible With
- Standard fuseholders rated for Class RK5, 600V cartridge fuses
- Motor control centers with rejection-type cartridge fuse mountings
- Industrial disconnect switches and combination starter equipment
- Power distribution panels rated for Class R fuses (250V or 600V)
- Equipment designed for 1.61-inch diameter, 9.63-inch length cartridge fuses
Replaces / Drop-In Replacement For
- Littelfuse FLSR-175 (equivalent rating and characteristics)
- Mersen TRS-R-175 (Class RK5, 175A dual-element fuse)
- Other Class RK5 175A time-delay fuses within identical voltage ratings
Works With
- Class RK5-certified motor control equipment and starter manufacturers
- UL-listed industrial automation systems and control cabinets
- Standard fused disconnect switches and combination motor starters
- Any circuit protected by dual-element, time-delay fuse coordination requirements
