1SFA611283R1001 ABB M3SSK1-101 3-Position Maintained Key Selector Switch

Why Choose the ABB M3SSK1-101 Key Selector Switch?

The ABB M3SSK1-101 is a 3-position maintained key-operated selector switch designed for controlled operator access in industrial machinery, automation systems and electrical control panels. Supplied under ABB order code 1SFA611283R1001, it forms part of ABB’s modular pilot device range and provides secure keyed selection across three fixed operating positions.

The M3SSK1-101 features a black/key operator, non-illuminated construction and a black plastic bezel. All three selector positions are maintained, allowing the chosen operating state to remain selected until deliberately changed. The key can be removed in all positions, providing flexibility where a machine or process state needs to remain secured after the operator withdraws the key.

This version uses key code 455, also identified by ABB as key 71. The selector operator is supplied without a holder or contact blocks, allowing compatible ABB modular components to be selected separately according to the required electrical switching arrangement. Its keyed operation makes it particularly suitable for authorised mode selection, maintenance controls and restricted machine functions.

Key Advantages

• 3-position maintained key selector switch for controlled industrial operation.
• Three fixed positions provide stable selection between multiple machine or process states.
• Key removable in all positions for flexible keyed-access control.
• Key code 455 / key 71 provides a defined key configuration.
• Black plastic bezel provides a practical finish for industrial control panels.
• Modular ABB construction allows compatible holders and contact blocks to be selected according to the required control circuit.

Key Features

• ABB M3SSK1 modular key-operated selector switch.
• 3-position maintained operation.
• Three fixed selector positions.
• Key-operated actuator.
• Key removable in all positions.
• Key code 455 / key 71.
• Black/key operator.
• Non-illuminated design.
• Black plastic bezel.
• Designed for ABB modular 22 mm pilot device applications.
• Holder and contact blocks are not included.
• ABB order code 1SFA611283R1001.

Three-Position Key-Controlled Selection for Industrial Automation

Key-operated selector switches provide an effective way to restrict changes to machine or process operating states to personnel holding the appropriate key. The ABB M3SSK1-101 provides three maintained positions, allowing an operator to select between three persistent control states without the selector automatically returning when released.

Because the key can be removed in every position, the selected operating state can remain set after the operator withdraws the key. The defined key 71 / key code 455 configuration supports applications requiring a known keyed-access arrangement, while ABB’s modular pilot device architecture allows suitable holders and contact blocks to be configured according to the required electrical control function.

Typical Applications

• Industrial machinery control panels.
• Three-mode machine operating selection.
• Authorised manual, automatic and service-mode selection.
• Maintenance and commissioning controls.
• Factory automation systems.
• Process and motor control panels.
• Key-controlled machinery and operator stations.
• OEM equipment requiring restricted access to multiple operating functions.