Overview
The Bussmann LPJ-60SP is an industrial-grade, dual-element, time-delay current limiting fuse designed for Class J applications. Each box contains 10 units rated at 60 amperes, 600 VAC/300 VDC, with an industry-leading 300 kA interrupting rating at 600V and 100 kA at 300V. This fuse series delivers both overload and short-circuit protection in a compact cylindrical form factor suitable for standard Class J fuse holders.
Key Features
- Dual-Element Design: Separate overload and short-circuit elements provide selective time delay for high inrush loads without nuisance trips.
- 300 kA Interrupting Rating: Exceptional fault current limitation protects downstream components from thermal and magnetic damage.
- 10-Second Ride-Through: Withstands 500% of rated current for a minimum of 10 seconds, ideal for motor starting and transient surges.
- Current Limiting Performance: Reduces fuse inventory requirements while maintaining 2:1 selective coordination within the Low-Peak family.
- Lower Operating Temperature: Dual-element construction has lower resistance than ordinary fuses, running cooler during normal operation.
- UL and CSA Certified: Meets all safety standards for branch circuit, control, and disconnect applications.
Technical Specifications
- Ampere Rating: 60 A
- Voltage Rating: 600 VAC / 300 VDC
- Interrupting Rating: 300 kA @ 600 VAC; 100 kA @ 300 VDC
- Class: Class J (UL classified)
- Type: Time Delay / Slow Blow (Dual-Element)
- Response Time: 10 seconds @ 500% rated current
- Terminal Type: Ferrule (Cartridge)
- Body Diameter: 1.06 inches (26.92 mm)
- Body Length: 2.38 inches (60.45 mm)
- Body Material: Melamine
- Mounting: Class J Fuse Holder
- Quantity per Box: 10 fuses
Typical Applications
- Industrial control circuits and machinery disconnects
- Motor branch circuits with high inrush requirements
- Power panelboard mains and branch protection
- Safety and security system power circuits
- HVAC and pneumatic system controls
- Pump motor overload and single-phase protection
Compatibility & Replacements
Compatible With
- Standard UL Class J fuse holders (600V rated)
- Industrial control cabinets and switchboards
- Motor control centers (MCC)
- Power distribution panels rated for Class J fuses
- Any 600 VAC or 300 VDC circuit requiring 60A protection
Replaces / Drop-In Replacement For
- Older Bussmann LPJ-60 (non-SP variant)
- Class J 60A time-delay fuses from competing manufacturers (verify holder compatibility)
- Applications previously using slower-acting Class R or RK5 fuses that require upgrade to Class J
Works With
- Class J fuse rejection devices and rejection slots
- Power factor correction capacitor circuits
- Variable frequency drives (VFD) branch circuits
- Combination starters and soft starters
- Series-rated panelboards and breaker combinations
