Siemens | MBKQJ3150H | Circuit Breaker | 150A | 3-Pole | 480V | 10kA | Bolt-On

Meet the Siemens MBKQJ3150H Circuit Breaker — a purpose-built solution for safeguarding 3-phase, 480V electrical systems with 150A capacity. Engineered for maintenance, retrofit, and replacement tasks, this bolt-on breaker delivers dependable protection where precise specs matter most.

Key specifications

• Amperage: 150 A
• Poles: 3-Pole
• Voltage: 480 V
• Interrupting rating: 10 kA
• Mounting style: Bolt-On

What makes this breaker unique

Designed to deliver balanced protection across all three phases, the MBKQJ3150H ensures synchronized tripping in demanding 480V distribution environments. The bolt-on mounting provides a secure, vibration-resistant installation that’s ideal for panel retrofits and replacements where space and mounting compatibility are critical. With a robust 10kA interrupting capacity, it caters to typical fault currents found in commercial and light industrial applications, helping to protect both conductors and connected equipment.

Practical use cases

• Panel retrofits upgrading to a 150 A, 3-pole protection solution
• Replacement for failed or aging circuit breakers with matching specs
• Maintenance work in commercial or light industrial facilities using 480V three-phase systems

Fit, compatibility, and installation notes

For the most reliable match, reference the part number MBKQJ3150H when checking compatibility. Confirm fit and ratings before ordering, and engage a qualified electrician to install and verify wiring configuration and panel compatibility to ensure optimal protection.