{"product_id":"micro-limit-switch-5a-with-medium-lever-se-940","title":"Micro Limit Switch (5A) with Medium Lever – SE 940","description":"\u003ch5\u003eOverview \u0026amp; Features\u003c\/h5\u003e\n\u003cp\u003eEnsure precise mechanical positioning and reliable contact switching with the \u003cstrong\u003eSE 940 Micro Limit Switch (Medium Lever)\u003c\/strong\u003e. Operating on a highly responsive snap-action mechanism, this standard SPDT (Single Pole Double Throw) lever switch is an essential electromechanical component for triggering endstops, detecting door closures, and sensing physical limits in automated systems.\u003c\/p\u003e\n\n\u003cp\u003eAvailable at Tomson Electronics, this compact limit switch is equipped with a medium-length straight metal lever, reducing the physical actuation force required while offering a distinct, tactile click upon contact. It is rated for a continuous 5A load, making it suitable for both logic-level microcontroller inputs and direct switching of low-power AC\/DC loads. The robust flame-retardant body and silver-plated brass terminals ensure high durability and a mechanical lifespan exceeding 100,000 operations.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eAlso searched as:\u003c\/strong\u003e se940 limit switch, 5 amp lever switch, snap action limit switch, spdt endstop switch, mechanical homing switch, medium lever snap switch.\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch5\u003eTechnical Specifications\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eModel:\u003c\/strong\u003e SE 940\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eActuator Type:\u003c\/strong\u003e Medium Straight Lever\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSwitch Type:\u003c\/strong\u003e SPDT (Single Pole Double Throw) - COM, NO, NC\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCurrent Rating:\u003c\/strong\u003e 5A at 125V \/ 250V AC\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSwitching Action:\u003c\/strong\u003e Momentary Snap-Action\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTerminal Type:\u003c\/strong\u003e 3-Pin Solder \/ Quick Connect (Brass, Silver-Plated)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBody Material:\u003c\/strong\u003e Flame-retardant Plastic (Polyamide\/PBT)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMechanical Life:\u003c\/strong\u003e \u0026gt; 100,000 Operations\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch5\u003eCommon Applications\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCNC \u0026amp; 3D Printing:\u003c\/strong\u003e Acting as reliable mechanical endstops and homing limit switches for stepper motor axes.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRobotics \u0026amp; Automation:\u003c\/strong\u003e Detecting physical collisions, robotic arm travel limits, and object positioning in automated assembly lines.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHome Appliances:\u003c\/strong\u003e Operating as safety interlocks for microwave doors, washing machines, and refrigerator lighting.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eArcade \u0026amp; DIY Projects:\u003c\/strong\u003e Custom triggers for arcade joysticks, coin acceptors, and mechanical puzzle boxes.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch5\u003eFrequently Asked Questions\u003c\/h5\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What do the three pins (COM, NO, NC) mean?\u003c\/strong\u003e\u003cbr\u003e\nA: COM stands for Common (the power input). NO is Normally Open (the circuit connects only when the lever is pressed). NC is Normally Closed (the circuit is connected by default and disconnects when the lever is pressed). You can choose which two pins to wire depending on your required logic.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Do I need a pull-up resistor if connecting this to an Arduino?\u003c\/strong\u003e\u003cbr\u003e\nA: Yes. Like all mechanical lever switches, you should use either an external pull-up\/pull-down resistor or enable the internal pull-up resistor (\u003ccode\u003eINPUT_PULLUP\u003c\/code\u003e) in your microcontroller code to prevent floating pins and false readings.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Can this handle main AC voltage?\u003c\/strong\u003e\u003cbr\u003e\nA: While the limit switch is technically rated to handle up to 250V AC at 5A, extreme caution must be taken when wiring mains voltage. Ensure all terminals are properly insulated with heat shrink tubing or female spade crimps, and enclosed in a safe housing to prevent accidental shock.\u003c\/p\u003e\n\n\u003ch5\u003ePackage Includes\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli\u003e1 × SE 940 Micro Limit Switch (5A) with Medium Lever\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SOYNIA ELECTRONICS","offers":[{"title":"Default Title","offer_id":49518481375470,"sku":"SWT-06909","price":40.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2132\/9029\/files\/se940-m-switch-medium-lever-500x500.jpg?v=1788179731","url":"https:\/\/www.tomsonelectronics.com\/products\/micro-limit-switch-5a-with-medium-lever-se-940","provider":"Tomson Electronics ","version":"1.0","type":"link"}