MBK125 | Siemens 125A 120/240V 2-Pole Main Breaker Kit for 1-Phase Liquid-Cooled Systems

Description 

The Siemens MBK125 is a 125-amp main circuit breaker kit designed for 1-phase liquid-cooled electrical systems operating at 120/240 VAC. This two-pole unit supports up to 70 kW of system power while providing reliable overcurrent protection with a 22 kA interrupt rating. Built with a durable aluminum housing, the MBK125 is suited for residential, commercial, and specialty installations requiring high-capacity main disconnect capability.

Technical Specifications 

Information About MBK125 

The MBK125 belongs to Siemens’ family of main breaker kits engineered for integration into liquid-cooled power distribution equipment. Designed for single-phase systems, its two-pole configuration ensures balanced handling of 120/240-volt loads commonly found in residential and light commercial applications. The breaker’s 22 kA interrupt rating supports safe clearing of high fault currents, while its 70 kW power capacity enables the unit to serve demanding electrical loads. Constructed with an aluminum enclosure and delivered in a large-format assembly, the MBK125 offers long-term durability and installation flexibility across diverse application environments.

Key Features:

• 125A, 120/240V rating: Supports high-capacity single-phase electrical systems.
• Designed for liquid-cooled applications: Suitable for specialized cooling-integrated power equipment.
• 2-pole configuration: Provides complete main disconnect capability for 1-phase systems.
• 22 kA interrupt rating: Ensures dependable short-circuit protection.
• 70 kW power capability: Supports large residential or commercial load demands.
• Aluminum housing: Offers lightweight durability and corrosion resistance.
• Large installation footprint: 48 in L × 37 in W × 97 in H for compatibility with major system enclosures.

The MBK125 delivers the reliability and precision required for main breaker protection in liquid-cooled power distribution systems.