208Y/120V Main Breaker Kit

ABB MB612 and MB613 main breaker kits are designed for 208Y/120V panelboard applications within A-Series II and ReliaGear Pro-Stock systems. These kits allow field installation of a main disconnect or sub-feed breaker in commercial and light industrial distribution systems.

Both models utilize THQB / THHQB breaker families and are commonly selected based on phase configuration, ampacity, and panel compatibility.

Available Options

• MB612: 240V single-phase main breaker kit for smaller distribution systems and light commercial loads.
• MB613: 240V three-phase main breaker kit for higher load applications requiring three-phase distribution.

Key Features

• 208Y/120V and 240V class panelboard applications
• Compatible with THQB / THHQB breakers
• Supports single-phase and three-phase configurations
• Designed for A-Series II and ReliaGear panelboards
• Includes hardware, bus connections, and lugs
• Breaker sold separately

Typical Applications

Used in commercial buildings, small industrial facilities, and tenant spaces requiring 120/208V or 240V distribution. Ideal for lighting panels, small equipment feeds, and retrofit installations.

Important Notes

Selection depends on panelboard interior, phase requirements, and breaker configuration.

MB612 and MB613 are similar but not interchangeable without verifying panel compatibility.