Siemens Q21515CTNC - 15 A, 240 V Plug-In Circuit Breaker | AmpState

Meet the Siemens Q21515CTNC — a purpose-built 15A, 240V plug-in molded case circuit breaker engineered for dependable branch circuit protection in panelboards and load centers. Designed for swift installations and straightforward replacements, this unit keeps your electrical system safe and ready with minimal downtime.

• Fast plug-in connection for quick installation and easy replacement in compatible Siemens panelboards and load centers, helping electricians save time on service calls and upgrades.
• Thermal-magnetic trip unit delivers stable, repeatable protection by combining a thermal element for overcurrent monitoring with a magnetic element for instantaneous response to short circuits — reducing nuisance trips and safeguarding connected equipment.
• 15A, 240V rating tailored to common residential, commercial, and light industrial branch circuits, supporting a wide range of loads from outlets to small HVAC or lighting branches.
• Plug-in molded case design ensures secure mounting and simple replacement without extensive rewiring, minimizing downtime during upgrades or fault isolation.
• OEM-compatible performance crafted to work with matching Siemens load centers and panelboards, preserving electrical characteristics and fitment for a seamless install.
• Part Number Q21515CTNC for precise ordering, cross-referencing, and reliable compatibility with Siemens electrical systems.
• Type Thermal-magnetic molded case circuit breaker — specifically engineered for reliable branch circuit overcurrent and short-circuit protection.

Who benefits from the Siemens Q21515CTNC? electrical professionals and facility managers who demand fast, dependable protection for 240V circuits in homes, small businesses, and light-industrial settings. It’s ideal for replacing aging breakers in Siemens panels or expanding protection in projects where quick service and consistent trip performance matter most.

Use cases to consider:

• Upgrading existing 15A, 240V circuits in residential panelboards to improve fault protection and reduce downtime during maintenance.
• Adding a reliable 240V branch circuit breaker in light commercial spaces such as small offices or retail fixtures.
• Replacing a worn or failing breaker in compatible Siemens load centers to maintain system integrity and compliance with electrical codes.

Technical snapshot:

• 15A
• 240V
• Plug-in
• Branch circuit overcurrent and short-circuit protection