Siemens QR23B250 Circuit Breaker – QR Series – 250A – 3 Pole – 240VAC – Bolt-On – Thermal Magnetic – 10kAIC

The Siemens QR23B250 is a QR Series low-voltage molded case circuit breaker designed for reliable circuit protection in commercial, industrial, and power distribution applications. Rated at 250A and 240VAC, this 3-pole breaker features a thermal-magnetic trip unit that provides dependable overload and short-circuit protection through Long-Time and Instantaneous (LI) trip functions.

Built on the QR frame platform and calibrated for standard 40°C operation, the QR23B250 offers a 10kA interrupting capacity at 240VAC. Its bolt-on mounting design ensures secure installation in compatible Siemens panelboards and switchboards. This breaker is supplied without lugs installed, allowing users to select the appropriate terminal kit for their specific application requirements.

Specifications

• Brand: Siemens
• Part Number: QR23B250
• Series: QR Series
• Type: QR2
• Category: Molded Case Circuit Breaker
• Mounting Type: Bolt-On
• Configuration: 3 Pole
• Phase: 3 Phase
• Protection Type: Thermal Magnetic
• Trip Functions: LI – Long-Time and Instantaneous
• Operating Temperature: 40°C Standard Calibration
• Standards: CSA Approved

Electrical Ratings

• Current Rating: 250A
• Voltage Rating: 240VAC
• Interrupting Capacity: 10kA @ 240VAC
• Frequency: 50/60 Hz

Construction

• QR frame design
• Bolt-on mounting configuration
• Thermal-magnetic trip mechanism
• Molded case construction
• Common-trip operation
• No lugs installed

Functions

• Overload protection
• Short-circuit protection
• Long-time delay protection
• Instantaneous fault protection
• Simultaneous three-pole tripping

Dimensions & Weight

• Height: 4.331 in
• Width: 7.087 in
• Depth: 3.937 in
• Weight: 4.52 lbs

Applications

• Commercial electrical distribution systems
• Industrial power distribution equipment
• Panelboards and switchboards
• Feeder circuit protection
• Motor and equipment protection
• Three-phase electrical systems

Returns are easy

You may return items within 30 days of delivery for a refund.

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