The PUREVOLT MSW-03A-0Q momentary micro switch with roller lever is built for precise position detection and limit switch applications. Its S.P.D.T. (single pole, double throw) configuration with N.O./N.C. (normally open / normally closed) contacts provides flexible wiring options for both industrial control circuits and DIY electronic projects.

Ideal For

• Limit switch installations on CNC machines, 3D printers, and automated equipment
• Position detection circuits in home appliances and consumer electronics
• DIY electronics projects requiring a reliable snap-action switch
• Replacing faulty micro switches on 125 V or 250 V AC equipment

Key Features

• Momentary snap-action with automatic reset - consistent and repeatable operation
• Dual voltage rating: 125 V and 250 V AC - compatible with most North American residential and industrial circuits
• High current rating of 16 A for robust switching capability
• 12 mm lever with 5 mm diameter roller wheel for precise mechanical detection
• PC terminals 6.35 mm (1/4 in.) for fast and secure connections
• Wide operating temperature range: -25 °C to +85 °C

Detailed Description
The PUREVOLT MSW-03A-0Q is a limit switch-type micro switch offering reliable and precise snap-action switching. Its S.P.D.T. configuration with 3 terminals (COM, N.O., and N.C.) makes it easy to integrate into detection or control circuits, whether wired normally open or normally closed depending on application requirements.

The roller lever actuator enables smooth detection of moving parts or mechanical surfaces without applying excessive force, extending the component's service life. With 6.35 mm (1/4 in.) PC-type tab terminals, electrical connection is fast and tool-free. This momentary roller lever micro switch is suitable for both residential and light industrial environments, with an operating temperature range of -25 °C to +85 °C.

Technical Specifications

• Brand: PUREVOLT
• Model: MSW-03A-0Q
• Type: Momentary limit switch micro switch
• Configuration: S.P.D.T. - 3 contacts (COM, N.O., N.C.)
• Operating mode: ON/(ON) - momentary
• Internal circuit: N.O./N.C. (normally open / normally closed)
• Voltage rating: 125 V / 250 V AC
• Current rating: 16 A
• Lever: 12 mm with 5 mm diameter roller wheel
• Terminal type: PC 6.35 mm (1/4 in.)
• Operating temperature: -25 °C to +85 °C
• Product dimensions: 12 cm x 8 cm x 1 cm (H x W x D)
• Weight: 20 g
• UPC Code: 691586098774

FAQ
What is the difference between N.O. and N.C. on this micro switch?
A: N.O. (normally open) means the circuit is open at rest and closes when the lever is actuated. N.C. (normally closed) means the circuit is closed at rest and opens upon actuation. Thanks to its S.P.D.T. configuration, this micro switch provides both options on a single component.
Is this micro switch compatible with 240 V installations?
Yes. This micro switch is rated for both 125 V and 250 V AC operation, making it compatible with the vast majority of residential and industrial circuits in North America.
How do I connect wires to this micro switch?
This model features 6.35 mm (1/4 in.) PC-type tab terminals, allowing the use of standard quick-connect spade terminals. No soldering is required for wiring.
Can this micro switch be used as a limit switch on a 3D printer or CNC machine?
Absolutely. This type of roller lever micro switch is widely used as a limit switch on CNC machines, 3D printers, and other automated systems requiring accurate position detection.