Siemens Q21540CT 40A 2P Circuit Breaker, Plug-On | AmpState

Meet the Siemens Q21540CT 40A 2P Plug-On Circuit Breaker — a precise, dependable safeguard for your electrical distribution. Built to integrate with panelboards and load centers, this two-pole breaker delivers consistent overcurrent protection exactly where you need it, helping you prevent nuisance trips and protect vital circuits.

Key specifications at a glance

• Manufacturer: Siemens
• Part Number: Q21540CT
• Product Type: Circuit Breaker
• Amperage: 40 A
• Poles: 2
• Mounting: Plug-On

What makes this breaker stand out

• Direct part-number match for maintenance and provisioning — designed for setups that require exact Siemens components, ensuring compatibility and reducing search time in spare inventories.
• Plug-On design — streamlined installation into compatible panelboards and load centers, enabling quicker replacements with solid, reliable bus-bar connections.
• Reliability for distributed power — 40 A protection for circuits that demand dependable overcurrent protection without compromising panel space or performance.
• AmpState availability — sourced through AmpState, making it easier to secure this specific part when building, repairing, or stocking critical electrical systems.

Ideal use scenarios

• Panel builders integrating Siemens-compatible breakers into new installations or retrofit projects.
• Maintenance teams performing routine replacements or stocking spare inventory for quick, exact-part repairs.
• Electrical distributors and service providers needing a reliable, two-pole 40 A solution for 120/240 V distribution circuits.

How to verify compatibility

Need help matching a part number or confirming compatibility? Message us and we’ll help you confirm fit.

Choose the Siemens Q21540CT 40A 2P Plug-On Circuit Breaker when you require precise part-number accuracy, straightforward installation, and dependable protection for your electrical distribution network. Available now from AmpState.