Overview
The Bussmann JKS-125 is a Class J fast-acting current-limiting fuse designed for industrial automation and control circuits requiring reliable short-circuit and ground-fault protection. Part of the Bussmann Limitron® line, this fuse delivers on average 10X faster circuit-limitation than basic circuit breakers or fuses.
Key Features
- Fast-acting, single-element design for Class J applications
- Current-limiting response provides 200kA interrupting rating at 600 VAC
- Non-inductive circuit protection with ground-fault response
- Blade terminal cartridge body for standard Class J fuse holders
- UL 248-8, CSA C22.2, and CE certified
- Compact rejection-style design prevents mismatches
Technical Specifications
- Ampere Rating: 125 A
- Voltage Rating: 600 VAC
- Interrupting Rating: 200 kA (symmetrical)
- Speed Characteristic: Fast-Acting
- Class: Class J
- Terminal Type: Blade Terminal
- Body Style: Cartridge (Melamine)
- Diameter: 1.63 inch (1-1/2 in)
- Length: 5.75 inch
- Element Type: Single-Element
- Mounting: Fuse holder, Class J rejection style
Typical Applications
The JKS-125 is ideal for:
- Motor control centers and distribution panels
- PLC and automation control circuits
- Industrial machinery and manufacturing equipment
- HVAC systems and commercial electrical installations
- Applications requiring rapid response to overcurrent or fault conditions
Compatibility & Replacements
Compatible With
- Class J fuse holders and rejection-style fuse blocks
- Standard industrial control panels rated 600 VAC
- Motor starters and control circuits
- Industrial electrical distribution systems
Replaces / Drop-In Replacement For
- Directly replaces other Class J 125A fast-acting fuses in rejection-style holders
- Compatible as direct replacement for other Bussmann JKS-125 units
- Verify existing fuse holder compatibility before ordering
Works With
- Class J fuse holders and bussways
- Standard 600 VAC control circuits
- Any electrical system designed for Class J cartridge fuses
