1SFA611283R3002 ABB M3SSK1-302 Three-Position Maintained Key Selector Switch

Why Choose the ABB M3SSK1-302 Key Selector Switch?

The ABB M3SSK1-302 is a robust three-position maintained key-operated selector switch designed for industrial machinery, automation systems and electrical control panels. Part of the ABB modular pilot devices range, it provides secure key-controlled selection between three operating states while combining a black key actuator with a durable chrome-metal bezel.

The M3SSK1-302 uses key code 421 and allows the key to be removed in all positions. Its maintained switching action keeps the selected position engaged until deliberately changed, making it suitable for authorised operating-mode selection, process control and other applications requiring three stable control states.

Designed for a standard 22 mm panel mounting hole, the M3SSK1-302 is a non-illuminated modular operator supplied without a contact block. Suitable ABB modular contact blocks can therefore be selected according to the required electrical control circuit, while IP66 front protection and a NEMA 4X rating support dependable service in demanding industrial environments.

Key Advantages

• Three-position maintained key selector switch for controlled industrial operation.
• Key code 421 provides a defined key-controlled configuration.
• Key can be removed in all three positions.
• Maintained operation holds the selected state until deliberately changed.
• Chrome-metal bezel provides a durable industrial finish.
• 22 mm panel mounting suits standard industrial control stations.
• IP66 front protection and NEMA 4X rating support demanding environments.

Key Features

• ABB M3SSK1 modular key selector switch.
• Three operating positions.
• Maintained switching action.
• Key-operated actuator.
• Key code 421.
• Key removable in all positions.
• Black/key actuator colour.
• Chrome-metal bezel.
• Non-illuminated design.
• 22 mm mounting-hole diameter.
• IP66 front degree of protection.
• Supplied without a contact block.

Secure Three-Position Control for Industrial Machinery

Key-operated selector switches provide a practical way to restrict changes to machine operating modes and control functions. Requiring the appropriate key helps prevent unintended or unauthorised operation while giving authorised personnel a clear method of selecting the required machine state.

The ABB M3SSK1-302 combines three maintained operating positions with key removal in every position, allowing the key to be withdrawn regardless of the selected state. Its modular ABB design also enables suitable contact blocks to be selected separately according to the electrical switching requirements of the installation.

Typical Applications

• Industrial machinery control panels.
• Authorised machine operating-mode selection.
• Three-state process and equipment controls.
• Maintenance and service mode selection.
• Automation and production equipment.
• Motor and process control panels.
• OEM machinery and operator control stations.