Overview
The Bussmann JHC3 is a 3-ampere, 600-volt Class J time delay fuse engineered for industrial and commercial circuit protection. As part of Eaton’s Bussmann series, this dual-element fuse combines overload and short-circuit protection elements to deliver selective coordination and reliable device protection. The JHC3 model represents proven time-delay fuse technology, making it suitable for motor branches, transformers, and other inrush-sensitive loads.
Key Features
- Class J current-limiting design for compact installation in standard fuse blocks
- Dual-element construction: separate overload and short-circuit elements for selective protection
- 10-second minimum time delay at 500% rated current to accommodate motor inrush
- 300,000-ampere interrupting rating at 600 VAC for reliable fault clearing
- Ferrule terminal design for secure connection in Class J fuse holders
- UL and CSA rated for safety-critical industrial applications
Technical Specifications
- Current Rating: 3 Amperes
- Voltage Rating: 600 VAC
- Fuse Class: Class J
- Fuse Type: Time Delay (Dual-Element)
- Time Delay: 10 seconds minimum at 500% rated current
- Interrupting Rating: 300,000 A @ 600 VAC
- Terminal Type: Ferrule x Ferrule
- Physical Length: 2.25 inches (Class J standard)
- Standards: UL, CSA, RoHS compliant
- Manufacturer: Eaton/Bussmann Series
Typical Applications
- Motor branch circuits and motor protection devices
- Industrial automation equipment and control systems
- Transformer primary and secondary protection
- HVAC and refrigeration compressor circuits
- High-inrush-current industrial loads requiring time-delay protection
- Three-phase and single-phase distribution panels
Compatibility & Replacements
Compatible With
- Class J ferrule-type fuse blocks and holders
- Standard industrial fuse blocks rated for 600 VAC
- Modular Class J fuse blocks (JM series)
- Motor control centers (MCCs) with Class J rated slots
- Motor branch circuit protectors and disconnect switches
Replaces / Drop-In Replacement For
- Legacy Bussmann JHC-series time delay fuses (same ratings and terminal configuration)
- Other Class J 3A 600V time-delay fuses with matching ferrule dimensions
Works With
- Bussmann Class J fuse blocks and holders
- Eaton motor control centers
- Industrial control systems requiring Class J circuit protection
- Systems compliant with NEC and CEC standards for Class J fuse protection
