Why Choose the ABB M3SSK2-104 Selector Switch?
The ABB M3SSK2-104 is a three-position maintained key-operated selector switch from ABB's modular plastic pilot-device range, designed for industrial machinery, control panels and automation systems. Its key-operated interface provides deliberate selection between three defined operating states while retaining the selected position until it is intentionally changed.
The M3SSK2-104 uses a random key selection configuration and provides three maintained positions with the key removable in position B only. This key-retention arrangement is particularly useful where the key should remain captured whenever either outer operating state is selected.
Designed for standard 22 mm panel mounting, the M3SSK2-104 features a black key-operated actuator, black plastic front ring, non-illuminated construction and IP66 front protection. It is supplied without a contact block, allowing compatible ABB modular contact blocks to be selected according to the required electrical switching arrangement.
Key Advantages
- Three-position maintained operation provides stable selection between three control states.
- Key removable in position B only provides defined key-retention behaviour.
- Random key selection identifies this specific M3SSK2 key configuration.
- Black plastic front ring provides a practical industrial operator-panel finish.
- IP66 front protection supports installation in demanding industrial environments.
- ABB modular construction allows compatible contact blocks to be selected for the required control circuit.
Key Features
- ABB M3SSK2 key-operated selector switch.
- Three selector positions.
- Maintained/latching operating function.
- No spring return.
- Random key selection.
- Key removable in position B only.
- Black key-operated actuator.
- Black plastic front ring.
- Non-illuminated construction.
- 22 mm mounting-hole diameter.
- IP66 front protection.
- NEMA Type 4X protection.
Controlled Three-Position Selection for Industrial Machinery
Three-position key selector switches provide a deliberate operator interface for machinery and processes requiring controlled selection between multiple operating states. The ABB M3SSK2-104 uses a maintained, latching mechanism without spring return, so the selected position remains mechanically set until the operator intentionally changes the selector.
The M3SSK2-104 permits key removal in position B only, while its random key-selection configuration distinguishes this variant within the M3SSK2 family. Combined with ABB's modular contact-block architecture, the selector is suitable for machine mode, process and function-selection applications requiring controlled three-position operation.
Typical Applications
- Industrial machinery control panels.
- Key-controlled machine mode selection.
- Operator control stations and consoles.
- Three-state process and function selection.
- Production and manufacturing equipment.
- Material handling and conveyor control systems.
- OEM machinery and electrical control assemblies.
