Why Choose the ABB M3SSK3-303 Selector Switch?
The ABB M3SSK3-303 is a three-position momentary 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 combines controlled access with temporary selector commands for applications requiring deliberate machine or process operation.
The M3SSK3-303 provides three selector positions with spring return from A and C to B, automatically returning the actuator to its centre position when released from either outer position. It uses a 3433-E key with code 73, making it suitable for temporary directional and command functions requiring key-controlled operation.
Designed for standard 22 mm panel mounting, the M3SSK3-303 features a black key-operated actuator, chrome-metal 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 momentary operation provides temporary key-controlled commands in either direction.
- Spring return from A and C to B automatically restores the selector to its centre position.
- 3433-E key with code 73 provides a defined key-operated control interface.
- Chrome-metal front ring provides a durable industrial operator-panel finish.
- IP66 front protection and NEMA Type 4X protection support demanding industrial environments.
- Standard 22 mm panel mounting supports straightforward integration into machinery and control panels.
Key Features
- ABB M3SSK3 key-operated selector switch.
- Three-position operation.
- Momentary switching function.
- Spring return from A to B and C to B.
- 3433-E key.
- Key code 73.
- Black key-operated actuator.
- Chrome-metal front ring.
- Non-illuminated construction.
- 22 mm mounting-hole diameter.
- IP66 front protection.
- NEMA Type 4X protection.
Reliable Key-Controlled Spring-Return Operation for Industrial Machinery
Three-position momentary key selector switches provide controlled temporary commands where access to the operating function should be restricted by a key. The ABB M3SSK3-303 provides spring return from both outer positions to the centre B position, so the selector automatically returns when the operator releases the key actuator.
This operating arrangement is well suited to temporary directional, jog, raise/lower, open/close and positioning commands. Combined with its 3433-E key, chrome-metal front ring and ABB modular contact-block architecture, the M3SSK3-303 provides a flexible operator interface for industrial machinery and automation systems.
Typical Applications
- Industrial machinery control panels.
- Key-controlled temporary machine commands.
- Forward/reverse control functions.
- Raise/lower and open/close controls.
- Machine jogging and positioning commands.
- Material handling and conveyor equipment.
- Production and process automation systems.
- OEM machinery and electrical control assemblies.
