Why Choose the ABB M3SS4-20U Selector Switch?
The ABB M3SS4-20U is a robust three-position maintained non-illuminated selector switch operator designed for industrial control panels, machinery and automation systems. Supplied under ABB order code 1SFA611213R2007, it forms part of ABB’s modular pilot device range and provides dependable manual mode and function selection.
The M3SS4-20U features a grey long-handle operator with a chrome-plastic bezel. Its three-position A-B-C mechanism uses maintained / latching operation, allowing the selected handle position to remain engaged until it is deliberately changed by the operator.
Designed for installation in a standard 22 mm mounting hole, the M3SS4-20U is supplied as a modular selector switch operator without a contact block. Its modular construction allows compatible ABB holders and contact blocks to be selected according to the required electrical switching arrangement.
Key Advantages
- Industrial three-position maintained selector switch operator for machinery and control panels.
- Maintained / latching operation keeps the selected position engaged until manually changed.
- Grey long-handle actuator provides convenient manual operation and clear position selection.
- Chrome-plastic bezel provides a professional panel appearance.
- Designed for standard 22 mm panel mounting.
- IP66 and NEMA Type 4X front protection support demanding industrial installations.
Key Features
- ABB M3SS4-20U selector switch.
- ABB order code 1SFA611213R2007.
- Three selector positions.
- A-B-C operating principle.
- Maintained / latching switching function.
- Long-handle actuator.
- Grey operator colour.
- Chrome-plastic bezel.
- Non-illuminated design.
- 22 mm mounting-hole diameter.
- IP66 front protection.
- NEMA Type 4X protection.
Reliable Maintained Control for Industrial Machinery
Three-position maintained selector switches are well suited to machine functions where an operator needs to select and retain one of several operating states. The ABB M3SS4-20U provides three A-B-C selector positions with a latching mechanism, allowing the long handle to remain in the selected position until it is manually moved.
ABB’s modular pilot-device construction allows the M3SS4-20U to be combined with compatible holders and contact blocks according to the required electrical switching arrangement. This flexibility makes the selector suitable for new machinery, control-panel construction, system integration, maintenance and replacement applications.
Typical Applications
- Industrial machinery control panels.
- Machine operating-mode selection.
- Manual, off and automatic control arrangements.
- Direction and process selection functions.
- Automation and production equipment.
- Motor and process control stations.
- OEM electrical control systems and panel building.
