Overview
The Bussmann LPS-RK-300 is a Class RK1 dual-element, current-limiting, time-delay fuse designed for reliable protection in industrial and commercial electrical systems. Operating at 600V AC and 300V DC, this Low-Peak fuse is widely used in feeder circuits, motor protection, transformer banks, and general-purpose branch circuits. The dual-element design provides exceptional protection against both overloads and short circuits while minimizing false trips caused by temporary surges and startup transients.
Key Features
- 300-amp rating with 300,000 A RMS symmetrical interrupting capacity at 600V AC
- Dual-element, time-delay construction resists nuisance openings during inrush current
- Current-limiting technology reduces fault damage to equipment
- Blade terminal connection and cylindrical body for standard RK1 holders
- UL listed and CSA/CE certified for North American and international compliance
- Melamine construction with zinc-plated contacts for durability
Technical Specifications
- Ampere Rating: 300 A
- Voltage Rating: 600 Vac / 300 Vdc
- Fuse Class: RK1
- Type: Dual-Element, Time-Delay
- Interrupting Rating: 300 kA RMS AC; 100 kA DC
- Mounting: Cartridge fuse holder compatible
- Body Style: Cylindrical
- Terminal Type: Blade terminal
- Dimensions: 2-3/8 in. diameter × 11-5/8 in. length
- Certifications: UL, CSA, CE
Typical Applications
- Feeder and branch circuits in industrial control panels
- Motor protection and soft-starter circuits
- Transformer primary protection
- Solenoid and contactor circuits
- General-purpose electrical distribution systems
Compatibility & Replacements
Compatible With
- Standard RK1 cartridge fuse holders (600V rated)
- Industrial control panels and motor control centers
- Distribution switchboards and electrical enclosures
- Motor soft-starters and variable frequency drives with fuse protection
Replaces / Drop-In Replacement For
- Eaton Bussmann LPS-RK-300SP (indicated version)
- Cooper Bussmann LPS-RK-300 legacy variants
- Other Class RK1 300A fuses in equivalent voltage/interrupting rating
Works With
- RK1 fuse holders and clips rated 600V AC
- Fuse blocks and cartridge holders for industrial switchgear
- Electrical safety protocols and codes (NEC, IEC 60269-2)
