ABB ST202M-K3 Circuit Breaker, 3A, 2-Pole, 277V

The ABB ST202M-K3 Circuit Breaker is engineered to protect 277V circuits in industrial service, maintenance, and replacement projects. With a precise 3 A rating and a 2-pole configuration, this model delivers dependable overcurrent protection where it matters most. Rely on ABB’s proven quality by matching your installation to the exact part number ST202M-K3, ensuring compatibility and consistent performance in the field.

• 2-pole design for simultaneous protection of two conductors within a single enclosure
• 3 A current rating suitable for lighting runs, control circuits, and small-load applications
• 277V nominal operating voltage aligned with common industrial and commercial electrical systems
• Part number ST202M-K3 as the definitive compatibility reference to verify fit
• Built with ABB reliability to support ongoing uptime in demanding environments

Ideal use cases — This breaker is well-suited for industrial electrical service, routine maintenance, and replacement projects where exact specifications are required. Use it in panelboards, switchgear, and distribution enclosures that accept ABB 2-pole breakers and are wired for 277V systems.

Compatibility and verification — To ensure a proper fit, verify the exact part number (ST202M-K3) against your equipment’s requirements. Check that your system operates at 277V and that a 2-pole, 3 A device is appropriate for the protected circuit. When in doubt, reference your equipment’s BOM and confirm alignment with ABB’s specifications for seamless installation.

Practical installation tips — Prioritize safety by de-energizing the circuit before replacement, using proper enclosure and channeling for the breaker, and following your facility’s torque and mounting guidelines. Keeping a labeled spare ST202M-K3 on hand simplifies future maintenance and minimizes downtime during panel work.

In projects where precise part matching matters, the ABB ST202M-K3 delivers clarity, compatibility, and reliable protection for 277V circuits. Use the part number ST202M-K3 as your anchor for ordering, documentation, and maintenance planning to keep your industrial electrical system running smoothly.