Why Choose the ABB M3SSK3-302 Key Selector Switch?
The ABB M3SSK3-302 is a robust 3-position key-operated selector switch designed for industrial control panels, machinery and automation systems. Part of the versatile ABB Modular pilot device range, it provides controlled momentary switching for applications where access to machine or process functions needs to be restricted by key.
The M3SSK3-302 features momentary operation with spring return from positions A and C to the centre position B. It uses key code 421, with the key removable in position B only, providing controlled access while automatically returning the selector to its centre position after an outer position is released.
With its chrome-metal bezel, black key actuator and non-illuminated construction, the M3SSK3-302 provides a durable operator interface for demanding industrial environments. It is designed for standard 22 mm panel mounting and is supplied without a contact block, allowing compatible ABB modular contact elements to be selected for the required control circuit.
Key Advantages
- 3-position key-operated selector switch for controlled industrial switching.
- Momentary spring-return operation from positions A and C to centre position B.
- Key code 421 for controlled access to machine functions.
- Key removable in position B only.
- Durable chrome-metal bezel for industrial control panels.
- Designed for standard 22 mm panel mounting.
- Modular construction allows compatible ABB contact blocks to be selected separately.
Key Features
- ABB M3SSK3-302 key selector switch.
- Three operating positions: A, B and C.
- Momentary switching action.
- Spring return from A and C to B.
- Key code 421.
- Key removable in position B only.
- Chrome-metal bezel with black key actuator.
- Non-illuminated operator.
- Supplied without contact block.
- IP66 front protection for demanding environments.
Controlled Momentary Selection for Industrial Machinery
Key-operated selector switches are used where machine functions or operating commands should be accessible only to personnel carrying the appropriate key. The ABB M3SSK3-302 combines key-controlled access with momentary spring-return operation, making it suitable for commands that should automatically return to a neutral centre position after activation.
As part of ABB's modular pilot device system, the M3SSK3-302 can be combined with compatible contact blocks to create the required electrical switching arrangement. Its standard 22 mm mounting format, robust chrome-metal bezel and high front protection make it suitable for industrial operator panels and machine control stations.
Typical Applications
- Industrial machinery control panels.
- Key-controlled momentary machine commands.
- Machine setup and maintenance functions.
- Production and process equipment.
- Operator control stations and control desks.
- Industrial automation and OEM machinery.
