Why Choose the ABB MBT344 NH2 Fuse Switch Expansion 3PW?
The ABB MBT344 is a CombiLine NH2 fuse switch disconnector expansion module designed for integrating high-current fused switching into compatible ABB low-voltage distribution cabinets. Supplied under ABB order code 2CPX041784R9999, it forms part of the ABB DESUJ Sub Distribution product group and is supplied as an unassembled, unequipped kit for professional switchboard construction.
Designed for a 3-panel-width (3PW) configuration, the MBT344 measures 450 × 750 × 225 mm and provides 108 space units. It is prepared for the installation of 3 NH2 fuse switch disconnectors and incorporates a 3-pole busbar system, providing a structured solution for high-current fused power distribution across a wide CombiLine cabinet field.
The MBT344 supports a maximum rated current of 440 A in its single-level busbar arrangement. Plastic covers with equipment cut-outs are finished in RAL 7035 and secured using 90-degree press-and-turn fasteners. The module is suitable from a cabinet depth of 225 mm and requires a compatible WR mounting frame, which must be ordered separately.
Key Advantages
- Prepared for installation of 3 NH2 fuse switch disconnectors.
- Supports a maximum rated current of 440 A.
- Integrated 3-pole busbar system for structured power distribution.
- 3-panel-width (3PW) format provides a wide 750 mm equipment field.
- 108 space units support systematic CombiLine cabinet planning.
- Unequipped design allows compatible NH2 fuse switch disconnectors to be selected for the application.
Key Features
- ABB MBT344 CombiLine fuse switch disconnector module.
- Designed for NH2 fuse switch disconnectors.
- 3-panel-width (3PW) configuration.
- 3 grid units / 450 mm module height.
- 750 mm module width.
- 225 mm minimum cabinet depth.
- 108 space units.
- Prepared for 3 NH2 fuse switch disconnectors.
- 3-pole busbar system.
- Maximum rated current of 440 A.
- Supplied unassembled and unequipped.
- Plastic covers with equipment cut-outs.
- RAL 7035 light-grey cover finish.
- 90-degree press-and-turn cover fastening.
- Designed for installation on a compatible WR mounting frame.
Three-Way NH2 Fused Power Distribution up to 440 A
The ABB MBT344 provides a dedicated mounting field for three NH2 fuse switch disconnectors, allowing multiple high-current circuits to be switched and fuse-protected within a structured CombiLine distribution assembly. Its 3-pole busbar arrangement supports a maximum rated current of 440 A in a single-level configuration, making the module suitable for substantial commercial and industrial distribution duties.
The MBT344 is supplied unequipped so that compatible NH2 fuse switch disconnectors can be selected separately for the installation. Its 450 × 750 mm modular footprint provides 108 space units, while the cut-out covers maintain access to the operating areas of the installed devices. A minimum cabinet depth of 225 mm is required, and ABB specifies that the cabinet depth must be considered carefully in the switch locking area.
Typical Applications
- ABB CombiLine N low-voltage distribution cabinets.
- NH2 fused power distribution circuits.
- Multiple high-current feeder protection and isolation.
- Commercial and industrial sub-distribution boards.
- 3-pole distribution systems up to 440 A.
- Professional switchboard and panel-building projects.
