Why Choose the ABB MBK312 Terminal Expansion 3PW?
The ABB MBK312 is an unmounted terminal expansion module designed for ABB low-voltage sub-distribution assemblies. Part of the ABB CombiLine N interior expansion system, it provides a structured mounting area for terminal blocks and associated wiring within professional distribution-board and switchgear installations.
The MBK312 uses vertically arranged 35 × 15 mm DIN rails that can be adjusted in depth using the ABB ZW39P2 deep-angle piece. This adjustable arrangement gives panel builders flexibility when positioning terminal blocks and organising conductors, while supporting both grounded and insulated installation configurations.
With a 2 GU / 300 mm height and a wide 3 PW / 750 mm field width, the MBK312 provides 72 modular units of panel capacity. It is suitable for both EDF and WR mounting frames and is designed for use in cabinets from approximately 215 mm depth.
Key Advantages
- Purpose-designed terminal expansion module for ABB CombiLine N distribution systems.
- Wide 3 PW / 750 mm field width for larger terminal arrangements.
- 2 GU / 300 mm module height.
- Provides 72 modular units of installation capacity.
- Vertically arranged 35 × 15 mm DIN rails for terminal block mounting.
- DIN rail depth can be adjusted using the ZW39P2 deep-angle piece.
- Suitable for both grounded and insulated installation.
- Compatible with EDF and WR mounting frames.
Key Features
- ABB CombiLine N interior expansion system.
- Terminal expansion module for low-voltage distribution assemblies.
- 2 GU / 300 mm height.
- 3 PW / 750 mm field width.
- 72 modular units.
- Vertically arranged 35 × 15 mm DIN rails.
- Variable DIN rail mounting depth.
- 66–113 mm usable depth for terminal installation.
- 244 mm usable terminal-block height for the 2 GU configuration.
- Suitable for grounded and insulated assembly.
- Unmounted kit format for flexible panel construction.
- Compatible with EDF and WR mounting frames.
Flexible Terminal Mounting for Distribution Assemblies
Terminal expansion modules provide dedicated space for organising terminal blocks, conductors and field wiring within low-voltage electrical assemblies. The ABB MBK312 uses vertically arranged DIN rails to maximise usable terminal space across its wide three-field configuration while supporting clear and serviceable wiring layouts.
The adjustable DIN rail system allows the mounting depth to be adapted to different terminal-block sizes and wiring requirements. Combined with compatibility for EDF and WR mounting frames, the MBK312 provides panel builders with a flexible solution for integrating terminal connections into ABB CombiLine N distribution systems.
Typical Applications
- ABB CombiLine N modular distribution assemblies.
- Low-voltage sub-distribution boards.
- Terminal block mounting and field wiring.
- Industrial and commercial electrical panels.
- Switchgear and control-panel construction.
- Grounded or insulated terminal installations.
