Microswitch - 2 Terminal

This is a simple 2-terminal microswitch, with a 36mm actuator. This switch has a great ‘clicky’ sound to it, and a nice tactile feel.

  • Max 3A 125/240VAC
  • 2 mounting holes
  • Long mechanical operating life* 0.63 x 1.1"
  • Weight: 5g

Microswitch - 2 Terminal Product Help and Resources

Switch Basics

May 7, 2013

A tutorial on electronics' most overlooked and underappreciated component: the switch! Here we explain the difference between momentary and maintained switches and what all those acronyms (NO, NC, SPDT, SPST, ...) stand for.

Core Skill: Electrical Prototyping

If it requires power, you need to know how much, what all the pins do, and how to hook it up. You may need to reference datasheets, schematics, and know the ins and outs of electronics.

1 Electrical Prototyping

Skill Level: Noob - You don't need to reference a datasheet, but you will need to know basic power requirements.
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Customer Comments

  • Can we get a data sheet fo rthis please.

  • Does anyone know the size of the mounting holes?

  • Can anyone recommend a connector to use on these switches? Or, lacking a solid recommendation, what are the dimensions of the leads?

  • Anyone have any comments about weather resistance of switch in an outside application? Appears to be pretty well sealed with the exception being the openings to prevent range of motion of the moving parts.

  • It looks to be similar to the three-terminal version, here:
    http://www.bao-lian.com/en/?p=3489
    I’ve uploaded their dimensional drawing of that switch to Imageshack (to avoid leeching), here:
    http://img88.imageshack.us/img88/5711/10318000n.jpg
    I hope that this proves useful.

  • What’s its thickness?

  • Oops, sorry should have looked at the pics….

    • DeadTom (or others coming here later…)
      I bought a few of these for CNC limit switches not realizing that limit switches are normally NC rather than NO (which these are).
      However, these are easy to pry apart with a fingernail and small screwdriver; there is actually a small tab connected to the NC position, so these are really three-terminal microswitches but the NC terminal is essentially clipped flush with the case. I swapped the two terminals (the small metal tabs easily slide out of the case)and so far it seems to be working fine as an NC switch now.

      • Thanks for your comment! That’s what I was planning to use them for! Are they effective?

  • Is this a normally open switch or normally closed?

  • deleted

  • is this momentary?

  • Wasn’t blue, but worked great otherwise. Lever is great for all sorts of applications.

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