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Siemens Q24040NC - 2-Pole 40A 240V Molded Case Breaker

Siemens
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The Siemens Q24040NC is a 2-pole molded case circuit breaker from the Q Series family, designed to provide thermal-magnetic overload and short-circuit protection in residential and commercial power distribution systems. This plug-in unit is rated for 40A at 240V AC with a 10kA interrupting capacity at 240V, utilizing LI (Long-Time and Instantaneous) trip functions for precise current management. The breaker measures 2.756 x 1.969 x 2.756 inches and weighs 0.838 lb, featuring a compact, plug-in connection for easy installation in compatible load centers. It is manufactured in Mexico and complies with industry standards for single-phase applications, making it suitable for branch circuit protection in lighting, appliance, and general-purpose loads. Typical applications include main or feeder breakers in Siemens Q-series panelboards, where reliable overcurrent protection is required for 40A circuits.

Key Features & Specifications
  • Type: Molded Case Circuit Breaker, Thermal Magnetic
  • Voltage Rating: 240V AC
  • Current Rating: 40A
  • Dimensions: 2.756 x 1.969 x 2.756 inch
  • Standards: UL Listed, CSA Certified
  • Applications: Branch circuit protection in residential and commercial panels
  • Switch Type: Toggle
  • Configuration: 2-Pole
  • Coil Voltage Maximum: Not applicable (thermal magnetic)
  • Temp Rating: 40°C ambient
  • Shipping Dimensions: 2.756 x 1.969 x 2.756 inch
  • Phase: 1
  • Voltage: 240V
  • Amperage: 40A
  • AIC rating: 10kA@240V
  • Connection: Plug-In
  • Poles: 2
  • Protection: Thermal Magnetic
  • Functions: LI - Long-Time and Instantaneous
  • Frame Size: Q Series
  • Trip Type: Thermal Magnetic
  • Panel Type: Q Series Load Centers
  • Breaker Type: Molded Case
  • Control Voltage Minimum: Not applicable
  • Control Voltage Maximum: Not applicable
  • MCM Size: Not applicable
  • Metal Type: Copper alloy contacts
  • Panel Style: Plug-on
  • Bus Type: Plug-in
  • Fuse Class: Not applicable
  • Insulation Temperature: 105°C
  • Inductance: Not specified
  • Impedance: Not specified
  • Barrels: Not applicable
  • Class Rating: Not applicable
  • Diameter: Not applicable
  • Velocity: Not applicable
  • Clip Center: Not applicable
  • Clas: Not applicable
  • Mounting: Plug-in
  • Hz: 50/60
  • Coil Material: Not applicable
  • Horse Power: Not specified
  • Aux Contacts: Not available
  • CPT: Not available
  • Full Load Amps: 40A
  • Dist Voltage: 240V
  • Bucket Size: Not applicable
  • Bucket Style: Not applicable
  • Bucket Type: Not applicable
  • Full Load Amp Maximum: 40A
  • Full Load Amp Minimum: 40A
  • Enclosure: Open style
  • Relay Style: Not applicable
  • Coil Voltage Minimum: Not applicable
  • Wire: Not applicable
  • Amperage Maximum: 40A
  • Amperage Minimum: 40A
  • Nema Rating: Not specified
  • Switch Style: Toggle
  • Wire Size: #14-2 AWG
  • Certification: UL, CSA
  • Circuit Breaker Mounting Style: Plug-in
  • Terminal Connection: Plug-in
  • Frequency Rating: 50/60 Hz
  • Phase Connection: Single
  • Standards: UL 489, CSA C22.2 No. 5
  • Compatible Frames: Q Series
  • Installation Type: Plug-in
  • Item QTY: 1
  • Nema Starter Size: Not applicable
  • Breaker Frame: Q Series
  • Current Rating: 40A
  • Reverse Standoff Voltage: Not applicable
  • Watts: Not specified
  • Peak Pulse Current: Not applicable
  • Breakdown Voltage (MIN VBR@IT ) (V): Not applicable
  • Breakdown Voltage (VBR@IT) (V): Not applicable
  • Polarity: Not applicable
  • Operating Temperature Maximum Celsius: 40°C
  • Max Clamp Voltage: Not applicable
  • On-State Current: Not applicable


Product Identification
  • UPC: 783643167773
  • GTIN: 00783643000000