Square D QO3251021 - Molded Case Circuit Breaker 25A 240V
Square D QO3251021 - Molded Case Circuit Breaker 25A 240V

Square D QO3251021 - Molded Case Circuit Breaker 25A 240V

Square D
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The Square D QO3251021 is a 3-pole molded case circuit breaker from the QO Series, designed to provide overcurrent protection for electrical systems. It operates at a voltage rating of 240V with a current rating of 25A and a 10kA interrupting capacity at 240V, utilizing a thermal magnetic protection mechanism for LI (Long-Time and Instantaneous Trip) functions. This plug-in breaker measures 3.0 in (76 mm) x 3.0 in (76 mm) x 2.9 in (74 mm) and weighs 1.21 lb, accepting wire sizes from AWG 14 to AWG 8 in copper or aluminum. It is compliant with industry standards for industrial applications, operating within a temperature range of -13 to 158 °F (-25 to 70 °C) and supporting 3-phase systems. Typical uses include branch circuit protection in commercial and industrial power distribution panels.

Key Features & Specifications
  • Type: Molded case circuit breaker, QO Series, thermal magnetic
  • Voltage Rating: 240V
  • Current Rating: 25A
  • Dimensions: 3.0 in (76 mm) x 3.0 in (76 mm) x 2.9 in (74 mm) (Height x Width x Depth)
  • Standards: Industry standard compliance
  • Applications: Industrial and commercial branch circuit protection
  • Switch Type: Circuit breaker
  • Configuration: 3-pole
  • Coil Voltage Maximum: Not applicable
  • Temp Rating: -13–158 °F (-25–70 °C)
  • Shipping Dimensions: Not specified
  • Phase: 3
  • Voltage: 240V
  • Amperage: 25A
  • AIC rating: 10kA@240V
  • Connection: Plug-In
  • Poles: 3
  • Protection: Thermal Magnetic
  • Functions: LI - Long-Time and Instantaneous Trip
  • Frame Size: Not specified
  • Trip Type: Thermal magnetic
  • Panel Type: Not specified
  • Breaker Type: Molded case
  • Control Voltage Minimum: Not applicable
  • Control Voltage Maximum: Not applicable
  • MCM Size: Not applicable
  • Metal Type: Not specified
  • Panel Style: Not specified
  • Bus Type: Not specified
  • Fuse Class: Not applicable
  • Insulation Temperature: Not specified
  • Inductance: Not applicable
  • Impedance: Not applicable
  • Barrels: Not applicable
  • Class Rating: Not applicable
  • Diameter: Not applicable
  • Velocity: Not applicable
  • Clip Center: Not applicable
  • Clas: Not applicable
  • Mounting: Plug-In
  • Hz: Not specified
  • Coil Material: Not applicable
  • Horse Power: Not specified
  • Aux Contacts: Not specified
  • CPT: Not specified
  • Full Load Amps: Not specified
  • Dist Voltage: Not specified
  • Bucket Size: Not specified
  • Bucket Style: Not specified
  • Bucket Type: Not specified
  • Full Load Amp Maximum: Not specified
  • Full Load Amp Minimum: Not specified
  • Enclosure: Not specified
  • Relay Style: Not applicable
  • Coil Voltage Minimum: Not applicable
  • Wire: AWG 14 to AWG 8, Copper/Aluminum
  • Amperage Maximum: 25A
  • Amperage Minimum: Not specified
  • Nema Rating: Not specified
  • Switch Style: Not applicable
  • Wire Size: AWG 14 to AWG 8
  • Certification: Not specified
  • Circuit Breaker Mounting Style: Plug-In
  • Terminal Connection: Not specified
  • Frequency Rating: Not specified
  • Phase Connection: 3-phase
  • Standards: Not specified
  • Compatible Frames: Not specified
  • Installation Type: Plug-In
  • Item QTY: 1
  • Nema Starter Size: Not applicable
  • Breaker Frame: Not specified
  • Current Rating: 25A
  • Reverse Standoff Voltage: Not applicable
  • Watts: Not applicable
  • 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: 70 °C
  • Max Clamp Voltage: Not applicable
  • On-State Current: Not applicable


Product Identification
  • UPC: Not specified
  • GTIN: Not specified