Westinghouse KDS4BK 400A 600V Circuit Breaker | AmpState

Meet the Westinghouse KDS4BK—a genuine circuit breaker engineered for robust protection in panelboards, load centers, and electrical distribution systems. With a 400 A rating and the ability to operate at up to 600 V, this unit is prepared to safeguard demanding installations while fitting seamlessly into legacy designs.

• Authentic model, authentic protection. The KDS4BK is a Westinghouse part chosen for reliability in medium- and large-current applications, ensuring your panelboards and distribution boards maintain the protection profile they were designed with.
• 400 A, 600 V specific. Supports high-current feeders and main breaks while accommodating the voltage requirements of contemporary electrical rooms and industrial spaces.
• Replacement-ready for BOM consistency. Ideal for replacement projects and stocking spares to keep the bill of materials aligned with the original part number, minimizing downtime during maintenance or upgrades.
• Easy compatibility checks. If you’re unsure about fit, you can message AmpState to confirm compatibility by part number and ensure a precise match for your panelboard or load center.

Who benefits most: facilities managers, electricians, and maintenance teams responsible for medium-to-large electrical distribution arrays who need dependable, long‑life circuit protection without re-engineering existing systems.

Practical use cases include retrofits in commercial spaces, spare parts for critical electrical rooms, and new installations where a genuine Westinghouse breaker aligns with original design intent. This ensures consistent protection characteristics and coordinated performance across your distribution network.

Choosing the Westinghouse KDS4BK through AmpState means selecting a trusted component designed for straightforward installation and reliable operation in demanding environments. Ready to confirm fit or place an order? Reach out—we’ll help verify that this 400 A, 600 V circuit breaker matches your exact panelboard or load center requirements.