Overview
The Bussmann LPJ-6SP is a Low-Peak Class J dual-element, time-delay, current-limiting fuse rated for 6 amperes at 600V AC (300V DC). This non-indicating, dual-element, time-delay fuse is engineered for branch circuit protection in industrial control, machinery disconnects, and power panelboard applications where high inrush loads require a minimum of 10 seconds of 500% rated current ride-through performance.
Key Features
- Dual-element, time-delay design with separate overload and short-circuit protection elements
- 300,000 amp interrupting rating at 600Vac RMS and 100kA Vdc
- 2-to-1 selective coordination ratio within the Low-Peak fuse family to prevent electrical shutdowns from extending beyond the failed circuit
- Diameter 0.81 inches, measuring 2.25 inches in length
- Current-limiting design protects downstream components from thermal and magnetic effects of short-circuit currents
- UL listed, CSA certified for low voltage
Technical Specifications
The LPJ-6SP meets Class J performance standards with the following verified parameters:
- Amperage Rating: 6A
- Voltage Rating: 600V AC / 300V DC
- Interrupting Rating: 300kA at 600V AC, 100kA at 300V DC
- Response Time: 10 second minimum at 500% rating
- Fuse Class: Class J
- Element Type: Dual-element (time-delay)
- Body Material: Melamine
- Terminal Type: Ferrule
- Physical Dimensions: 0.81 inches diameter × 2.25 inches length
- Indicating Type: Non-indicating
Typical Applications
The Bussmann LPJ-6SP is suitable for:
- Branch circuit breaker panelboard mains and industrial control equipment
- Machinery disconnects and motor starter circuits with high inrush current
- Power distribution panelboards requiring Class J current-limiting protection
- Safety and security system installations
- Any application requiring selective coordination and transient surge tolerance
Compatibility & Replacements
Compatible With
- Class J fuse holders and rejection bases
- UL-listed panelboards accepting Class J cartridge fuses
- Standard Class J fuse clips rated for 600V applications
Replaces / Drop-In Replacement For
Alternative part designations include LPJ6, LPJ-6, LPJ6A, LPJ-6A, LPJ6SP, LPJ6-SP, and LPJ-6-SP, which refer to the same fuse specification. Verify compatibility with your specific fuse holder before ordering.
Works With
- UL Class J fuse systems (1–600A range)
- Standard electrician fuse extractors and removal tools
- Industrial electrical distribution and control systems
