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Westinghouse HQNB3050 - Molded Case 50A 3-Pole 240V

Westinghouse
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Condition
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The Westinghouse HQNB3050 is a three-pole molded case circuit breaker designed for overcurrent protection in industrial and commercial power distribution systems. It is rated for 50A continuous current at 240VAC, with a 10kA interrupting capacity at 240V, and utilizes a thermal-magnetic trip mechanism providing long-time and instantaneous (LI) protection. This bolt-on breaker weighs 5 lb and is part of the QUICKLAG family, Type Q, featuring a compact molded case construction for panelboard installation. It complies with applicable UL and NEMA standards for branch circuit protection. Typical applications include protecting feeders, motors, and lighting circuits in three-phase 240V systems.

Key Features & Specifications
  • Type: Molded Case Circuit Breaker, QUICKLAG Family, Type Q
  • Voltage Rating: 240V
  • Current Rating: 50A
  • Dimensions: Standard molded case size for 3-pole bolt-on
  • Standards: UL 489, NEMA AB-1
  • Applications: Industrial and commercial power distribution, feeder and branch circuit protection
  • Switch Type: Thermal-magnetic trip
  • Configuration: 3-pole, 3-phase
  • Coil Voltage Maximum: Not applicable (thermal-magnetic)
  • Temp Rating: 40°C ambient
  • Shipping Dimensions: Standard packaging
  • Phase: 3
  • Voltage: 240V
  • Amperage: 50A
  • AIC rating: 10kA@240V
  • Connection: Bolt-On
  • Poles: 3
  • Protection: Thermal Magnetic
  • Functions: LI - Long-Time and Instantaneous
  • Frame Size: HQN frame
  • Trip Type: Thermal-magnetic
  • Panel Type: Compatible with Westinghouse QUICKLAG panelboards
  • Breaker Type: Molded Case
  • Control Voltage Minimum: Not applicable
  • Control Voltage Maximum: Not applicable
  • MCM Size: Not applicable
  • Metal Type: Molded case (insulated)
  • Panel Style: Bolt-on
  • Bus Type: Bolt-on bus
  • Fuse Class: Not applicable
  • Insulation Temperature: 75°C rated
  • 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: Bolt-on
  • Hz: 50/60 Hz
  • Coil Material: Not applicable
  • Horse Power: Not specified
  • Aux Contacts: Not included
  • CPT: Not included
  • Full Load Amps: 50A
  • Dist Voltage: 240V
  • Bucket Size: Not applicable
  • Bucket Style: Not applicable
  • Bucket Type: Not applicable
  • Full Load Amp Maximum: 50A
  • Full Load Amp Minimum: 50A
  • Enclosure: Open (for panelboard installation)
  • Relay Style: Not applicable
  • Coil Voltage Minimum: Not applicable
  • Wire: Not applicable
  • Amperage Maximum: 50A
  • Amperage Minimum: 50A
  • Nema Rating: NEMA AB-1
  • Switch Style: Not applicable
  • Wire Size: #14 AWG to #2 AWG (copper)
  • Certification: UL 489
  • Circuit Breaker Mounting Style: Bolt-On
  • Terminal Connection: Bolt-on lugs
  • Frequency Rating: 50/60 Hz
  • Phase Connection: 3-phase
  • Standards: UL 489, NEMA AB-1
  • Compatible Frames: HQN frame
  • Installation Type: Panelboard
  • Item QTY: 1
  • Nema Starter Size: Not applicable
  • Breaker Frame: HQN
  • Current Rating: 50A
  • 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: 40°C
  • Max Clamp Voltage: Not applicable
  • On-State Current: Not applicable


Product Identification
  • UPC: Not available
  • GTIN: Not available