The VJF series from VICFUSE is a Class J fast-acting current-limiting fuse engineered for advanced industrial circuit protection applications requiring high interrupting performance, low I²t characteristics, and rapid fault-clearing response.

Designed according to UL248-8 standards, the VJF fuse series combines the low I²t performance typically associated with semiconductor protection fuses and the branch circuit protection capability of a Class J fuse. This makes the VJF series an ideal solution for protecting solid-state motor controllers, power semiconductors, automation systems, and industrial power distribution equipment.

With voltage ratings up to 600VAC and 500VDC, current ratings from 1A to 600A, and interrupting ratings up to 200kA AC, the VJF series provides dependable overcurrent and short-circuit protection in demanding industrial operating environments.

Key Features

• Class J fast-acting current-limiting fuse
• High interrupting capacity up to 200kA AC
• Low I²t performance for semiconductor protection
• Fast fault-clearing characteristics
• Voltage ratings up to 600VAC and 500VDC
• Current ratings from 1A to 600A
• Designed according to UL248-8
• Compact industrial fuse design
• CE, UL, and RoHS compliant
• Supports NEC branch circuit protection requirements

Electrical Specifications Voltage Ratings

• 600VAC
• 500VDC

Current Ratings

• 1A to 600A

Interrupting Ratings

• 200kA AC
• 100kA DC

Operating Type

• Fast-Acting
• Current-Limiting

The VJF series rapidly interrupts fault currents to reduce energy let-through and help protect downstream electrical equipment from overload and short-circuit damage.

Semiconductor & Industrial Protection Performance

The VJF fuse series is specifically designed for applications involving sensitive power electronic devices and industrial control systems.

The low I²t characteristics help protect:

• Diodes
• SCRs
• GTOs
• SSRs
• Solid-state motor controllers
• Semiconductor power modules

Its current-limiting design minimizes thermal and mechanical stress during fault conditions, improving equipment reliability and reducing system downtime.

Applications

The VJF Class J fuse is suitable for a broad range of industrial and electrical protection applications, including:

• Industrial automation systems
• Motor control centers
• Semiconductor protection
• Power conversion equipment
• Industrial power distribution
• Branch circuit protection
• Variable frequency drives (VFDs)
• UPS systems
• Control panels
• Renewable energy systems
• OEM industrial equipment

Certifications & Compliance

The VJF series complies with recognized international safety and environmental standards:

• UL248-8
• UL Certified
• CE Compliant
• RoHS Compliant

VJF Class J Fuse Blocks & Accessories

VICFUSE also offers compatible 600V Class J fuse blocks and fuse holders designed to support secure installation, maintenance efficiency, and enhanced operator safety.

Fuse Block Features

• DIN rail mounting compatibility
• Space-saving compact design
• Reinforced fuse clips
• Optional indication functionality
• Universal mounting holes
• UL94 V-0 flammability rated materials
• RoHS compliant construction

Fuse Holder Features

• IP20 protection degree
• 1-, 2-, and 3-pole configurations
• Indicating and non-indicating versions available
• Easy fuse installation and removal
• Compact thermoplastic housing
• 35mm DIN rail mountable

These accessories are optimized for industrial power systems and control panel applications requiring dependable fuse integration and maintenance accessibility.

Industrial Advantages

• High interrupting capacity for enhanced equipment protection
• Fast-acting response for sensitive semiconductor devices
• Low I²t characteristics help minimize fault energy
• Reliable branch circuit protection performance
• Supports industrial safety and NEC compliance requirements
• Compact Class J design for efficient panel utilization
• Suitable for harsh industrial operating environments