Siemens JK3B090 90A 3-Pole 240 V Circuit Breaker

The Siemens JK3B090 90A 3-Pole 240 V Circuit Breaker is a purpose-built safety device for demanding 3-phase electrical systems. With a 90-amp rating and 240-volt capability, this unit provides reliable, coordinated protection for larger loads in commercial and light-industrial panels. Identified by part number JK3B090, it’s designed to work seamlessly within Siemens’ JK-series, delivering dependable performance you can trust when it matters most.

• Three-pole, 240 V protection: simultaneously disconnects all three hot conductors in a 3-phase circuit when an overload or fault occurs, helping prevent uneven phase loading and equipment damage.
• High-current handling for sizable loads: 90 A rating suits motors, compressors, conveyors, and other high-demand equipment while maintaining fast fault interruption when needed.
• Designed for Siemens panels: compatible with panels and distribution boards that accept JK-series breakers, enabling straightforward replacement and consistent performance with other Siemens components.
• Easy installation and serviceability: compact, standard mounting in compatible enclosures simplifies wiring, testing, and future maintenance.
• Clear part identification for maintenance: JK3B090 designation makes ordering, stocking, and referencing in documentation straightforward and error-free.

Ideal use cases: install this breaker in commercial or light-industrial environments where a 3-phase, 240 V supply feeds heavy equipment or multiple feeders. It’s well-suited for protecting motor circuits, HVAC equipment, and large power distribution runs where reliable tripping behavior and phase-consistent disconnection are essential.

Practical considerations: verify that your panel accepts JK-series breakers and that a 3-pole 90 A device aligns with your system’s electrical design and local codes. Use this breaker as part of a cohesive protection strategy within a Siemens-compatible distribution setup to ensure predictable performance and easier maintenance over the life of the installation.