Overview
The Bussmann KRP-C-601SP is a Class L time-delay, current-limiting fuse designed for high-capacity industrial power distribution and motor control applications. Rated at 601A with an interrupting rating of 300 kA at 600 Vac and 100 kA at 300 Vdc, this fuse combines fast short-circuit protection with time-delay characteristics to prevent nuisance trips on inrush currents while safeguarding equipment from sustained faults.
Key Features
- Class L current-limiting, time-delay fuse with 4 seconds minimum delay at 500% of rated current
- Current-limiting design with glass melamine tube and silver-plated end bells
- UL Listed (Guide JDDZ, File E4273), CSA Certified (Class 1422-02, File 53787), CE marked, and RoHS compliant
- All-purpose silver-linked fuse for both overload and short-circuit protection
- Industry’s only UL Listed and CSA Certified fuse with 300kA Vac interrupting rating that exceeds requirements for virtually all applications and provides fast short-circuit protection with optimal arc flash characteristics
Technical Specifications
- Rated Current: 601A
- Voltage Rating: 600 Vac, 300 Vdc
- Interrupting Rating: 300 kA at 600 Vac RMS Sym., 100 kA at 300 Vdc
- Class: L (Class L per CSA C22.2, No. 248.10)
- Speed: Time-delay – 4 seconds (minimum) at 500% of rated current
- Type: Current-limiting, glass melamine tube
- Dimensions: 2.5″ Dia × 8 5/8″ L (63.5 × 203.2 mm)
- Weight: 3.64 lbs
- UPC: 051712605069
- Certifications: UL Listed, CSA Certified, CE, RoHS
Typical Applications
The KRP-C-601SP is ideal for protecting:
- Industrial power distribution systems rated above 225A
- Motor control centers and motor feeders
- Transformer primaries and secondary feeds
- Large machinery and equipment requiring high interrupting capacity
- Commercial HVAC and refrigeration systems
- Industrial automation and control cabinet feeds
Compatibility & Replacements
Compatible With
- Class L fuse holders and clips (standard bolt-down cartridge style)
- 600V three-phase and single-phase electrical distribution systems
- Motor control applications with 601A or greater circuit protection requirements
- Industrial equipment rated for Class L current-limiting protection
Replaces / Drop-In Replacement For
- Bussmann KRP-C-601 (earlier designation)
- Cooper Bussmann KRP-C-601SP
- Eaton Bussmann KRP-C-601SP
- Direct replacement for other Class L 601A fuses with equivalent specifications
Works With
- Class L UL-Listed fuse holder assemblies
- Standard 600V AC power distribution equipment
- Motor control centers (MCC) with Class L protection slots
- Switchgear and panelboards rated for Class L cartridge fuses
- Industrial control systems requiring 300kA interrupting rating
