Siemens MBK150A 150 Amp Main Breaker – Load Center Conversion Kit – 120/240V

The MBK150A Main Breaker from Siemens is a factory-approved load center conversion kit designed to add or replace a main breaker in compatible Siemens load centers. Built with thermal-magnetic protection and a high interrupt rating, it delivers dependable overcurrent and short-circuit protection for residential and light commercial electrical systems.

Voltage and Rating

• Current Rating: 150 Amps
• Voltage Rating: 120/240 Volts AC
• Interrupt Rating: 22 kA AIR

Key Specifications

• Breaker Type: Main Circuit Breaker
• Number of Poles: Single-Pole (1P)
• Trip Type: Thermal Magnetic
• Mounting Type: Load Center Conversion Kit
• Connection Type: Bolt-On
• Frame Type: Family G Main
• Frequency Rating: 60 Hz

Physical Specifications

• Dimensions (H × W × D): 4.33 × 6.30 × 3.94 inches
• Weight: 1.896 lbs

Certifications

• UL 489 Listed

Product Data

• Brand / Manufacturer: Siemens
• Model Number: MBK150A
• UPC: 783643387997
• Special Features: Conversion Kit

Returns are easy

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

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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).

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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.