Square D KC342501021 250A 3P 480V Circuit Breaker, Shunt Trip | AmpState

Introducing the Square D KC342501021 250A 3P 480V circuit breaker with Shunt Trip — a purpose-built protection device designed for reliable, safer electrical distribution in panelboards, load centers, and comprehensive distribution systems. This part is ideal for replacement projects and stocking spares to keep your BOM aligned with the original specification, so maintenance and upgrades stay on track without surprises.

• Part number: KC342501021
• Type: Circuit Breaker with Shunt Trip
• Amperage rating: 250 A
• Poles: 3-pole (3P)
• Voltage rating: 480 V

Key benefits that matter in real-world electrical protection:

• Shunt Trip capability enables remote tripping for rapid emergency shutdowns, enhancing safety in industrial environments, data centers, and critical facilities. This feature gives you an extra layer of control to prevent damage during fault conditions or process upsets.
• BOM-aligned replacement and easy stocking for original installations. Keeping KC342501021 on hand ensures your panelboards and distribution gear stay faithful to the original design, reducing retrofit hassles and compatibility questions.
• Robust 3P, 480V protection suited to demanding three-phase applications, enabling dependable circuit isolation and fault interruption across your electrical distribution network.
• Trusted brand, proven performance from Square D, a name associated with enduring protection for industrial and commercial power systems.

Ideal use cases

• Replacements in existing panelboards and load centers where the original KC342501021 is specified.
• Spare inventory for facilities relying on consistent BOM integrity and fast maintenance turns.
• Applications requiring remote shutdown capability for safety interlocks, emergency stops, or process automation environments.
• New installations or upgrades that demand a 3-pole, 480V protection device with shunt-trip functionality.

What sets this breaker apart is not just the spec sheet, but how it fits into real-world scenarios. The shunt-trip feature provides immediate control during incidents, while the 250A rating and 3P configuration deliver the robust protection needed for medium- to heavy-load applications. Paired with AmpState’s readiness to support compatibility checks, this breaker helps you minimize downtime and keep your electrical distribution running smoothly.

If you’re unsure about fit or compatibility with your panel or BOM, AmpState is ready to assist. Need help matching a part number or confirming compatibility? Message the AmpState team and get expert guidance to confirm the right KC342501021 solution for your system.