Siemens MBKQR3150A Breaker Kit – P1 Panel Mounting Kit – 3 Pole – 240VAC – QR23B150 Included

The Siemens MBKQR3150A is a low-voltage breaker mounting kit designed for revised Siemens P1 panelboards, providing a complete installation solution for QR Series molded case circuit breakers. This kit includes a 3-pole QR23B150 circuit breaker and the required mounting strap hardware for secure integration into compatible 240V, 3-phase panelboard systems.

Engineered for commercial and industrial electrical distribution applications, the MBKQR3150A ensures proper alignment, secure mounting, and reliable operation of the breaker within Siemens P1 interiors. It is designed specifically for revised panelboard configurations and is not intended for use with older P1 panel systems.

This assembly delivers a convenient, factory-matched solution that simplifies installation while maintaining Siemens’ performance and safety standards for low-voltage power distribution.

Specifications

• Brand: Siemens Breakers
• Part Number: MBKQR3150A
• Series: QR Series / P1 Panel Kit
• Category: Breaker Mounting Kit (Complete Assembly)
• Panel Type: Revised P1 Panelboards
• Configuration: Main / Branch Breaker Kit
• Voltage Rating: 240VAC
• Phase: 3 Phase
• Frequency: 50/60 Hz
• Weight: 7.011 lb

Included Components

• Siemens QR23B150 Circuit Breaker
  • 3 Pole
  • 150A Rating
  • QR Series molded case breaker
• Mounting Strap Hardware Kit
  • Designed for P1 panelboard installation
  • Secure breaker mounting support

Construction

• Heavy-duty breaker mounting assembly
• Factory-matched breaker and hardware kit
• Designed for revised P1 panel interiors
• Durable industrial-grade components
• Secure mechanical alignment system

Functions

• Circuit protection (overload and short-circuit via included breaker)
• Breaker mounting and panelboard integration
• Mechanical support and alignment
• Safe installation in Siemens P1 systems

Applications

• Commercial electrical panelboards
• Industrial power distribution systems
• P1 panelboard upgrades and installations
• 3-phase low-voltage distribution systems
• Branch circuit protection systems

Returns are easy

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

FREE Shipping on orders over $149.

My Circuit Breakers offers one to five day delivery in the United States. The variation depends on the chosen shipping speed and the warehouse location for the product(s).

Same Day Shipping

We strive to ship out your items within one business day.

In rare circumstances, My Circuit Breakers may reserve up to 5 business days to complete shipment. Feel free to contact us if your order is time sensitive.

My Circuit Breakers provides a comprehensive 1-year warranty on both new and reconditioned products. Rest assured, all products are authentic OEM (original equipment manufacturer). Extended warranties are available upon request.