--- product_id: 715603524 title: "HiLetgo 10PCS Kw12-3 Ac 250V 5A Spdt 1No 1Nc Micro Limit Switch Normally Open Close Limit Switch with Roller Lever Arm Black" brand: "hiletgo" price: "$21.42" currency: USD in_stock: true reviews_count: 5 category: "Hi Letgo" url: https://www.desertcart.us/products/715603524-hiletgo-10pcs-kw12-3-ac-250v-5a-spdt-1no-1nc store_origin: US region: United States of America --- # AC 125-250V rated voltage SPDT 1NO 1NC dual contact modes Compact 20x10.5x6.5mm size HiLetgo 10PCS Kw12-3 Ac 250V 5A Spdt 1No 1Nc Micro Limit Switch Normally Open Close Limit Switch with Roller Lever Arm Black **Brand:** hiletgo **Price:** $21.42 **Availability:** ✅ In Stock ## Summary > ⚙️ Elevate your electronics with precision micro-switch mastery! ## Quick Answers - **What is this?** HiLetgo 10PCS Kw12-3 Ac 250V 5A Spdt 1No 1Nc Micro Limit Switch Normally Open Close Limit Switch with Roller Lever Arm Black by hiletgo - **How much does it cost?** $21.42 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/715603524-hiletgo-10pcs-kw12-3-ac-250v-5a-spdt-1no-1nc) ## Best For - hiletgo enthusiasts ## Why This Product - Trusted hiletgo brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Value Pack of 10:** Stock up and save with a bulk set engineered for long-term projects and prototyping. - • **Compact & Durable Design:** Sleek black roller lever switch built to fit tight spaces without compromising reliability. - • **Dual Contact Flexibility:** Seamlessly toggle between Normally Open and Normally Closed states to fit any circuit design. - • **Precision Instant Action:** Experience lightning-fast switching with minimal contact spacing for ultra-responsive control. - • **Versatile Industrial Applications:** Trusted in automotive, medical, home appliances, and automation for consistent performance. ## Overview The HiLetgo KW12-3 Micro Limit Switch is a compact, high-performance SPDT switch rated for AC 125-250V and 5A current. Featuring a roller lever arm and dual Normally Open/Closed contacts, it delivers fast, reliable switching action ideal for automotive, industrial, and household electronic applications. This pack of 10 switches offers excellent value for professionals seeking durable, space-saving components with IP54 protection. ## Description 10pcs Black KW12-3 Micro Roll Lever Arm Usually Open Close Limit Switches, with Roller Lever. Working principle: through external mechanical force transmission elements (by pins, buttons, levers, rollers, etc.) will be used to force action on a pick, producing instant action of the pick when the action is shifted to the critical point, so that the mobile contact with the fixed contact spring at the end of the action point quickly on or off. When the force is removed in the drive components, the action pick produces the reverse action force transmission element, reverse stroke when the action hits a critical point pick, instant reverse action. Package included: 10*KW12-3 Micro Roller Limit Switches Review: جيد جدا - جيد جدا Review: Good switches for the price - So far so good! These come in a pack of 10 which makes this a pretty good value. I cannot attest to durability since they have not been in use for long enough, but they do seem solid. Response on these seems proper. I am using them in a slightly non-conventional way (as a button of sorts) but they are doing the job nicely. ## Features - KW12-3 Roller Lever Arm Micro Limit Switch, Normally Open and Closed Diameter: 20 x 10.5 x 6.5 mm (L x W x H) - Contact spacing is small and short action, according to the brake power small and fast. - Rated Voltage: AC 125V-250V; Current Rating: 5A - Application: Apply to a computer mouse, car mouse, automotive electronic products, communication equipment, military products, test instrument, gas water heater, gas burner, small household appliances, microwave oven, electric rice cooker, floating ball support equipment, medical equipment, building automation, power tools, etc. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B07X142VGC | | Brand | HiLetgo | | Brand Name | HiLetgo | | Color | black / black | | Connector Type | Smt | | Connector type | Smt | | Contact Type | Normally Open | | Contact type | Normally Open | | Customer Reviews | 4.7 out of 5 stars 669 Reviews | | International Protection Rating | IP54 | | Item Dimensions | 10 x 20 x 37 centimeters | | Manufacturer | HiLetgo | | Material Type | Plastic | | Model | 3-01-1546 | | Mounting Type | PCB Mount | | Number of Items | 10 | | Operation Mode | manual | | Operation mode | manual | | Part Number | 3-01-1546 | | Switch Type | Limit Switch | | Switch type | Limit Switch | | Terminal | Spdt | | Unit Count | 10.0 Count | | Wattage | 1250 watts | ## Product Details - **Brand:** HiLetgo - **Connector type:** Smt - **Contact type:** Normally Open - **Operation mode:** manual - **Switch type:** Limit Switch ## Images ![HiLetgo 10PCS Kw12-3 Ac 250V 5A Spdt 1No 1Nc Micro Limit Switch Normally Open Close Limit Switch with Roller Lever Arm Black - Image 1](https://m.media-amazon.com/images/I/51r8DLmZQ9L.jpg) ![HiLetgo 10PCS Kw12-3 Ac 250V 5A Spdt 1No 1Nc Micro Limit Switch Normally Open Close Limit Switch with Roller Lever Arm Black - Image 2](https://m.media-amazon.com/images/I/51icHkEmmKL.jpg) ![HiLetgo 10PCS Kw12-3 Ac 250V 5A Spdt 1No 1Nc Micro Limit Switch Normally Open Close Limit Switch with Roller Lever Arm Black - Image 3](https://m.media-amazon.com/images/I/51GM+0aI4JL.jpg) ![HiLetgo 10PCS Kw12-3 Ac 250V 5A Spdt 1No 1Nc Micro Limit Switch Normally Open Close Limit Switch with Roller Lever Arm Black - Image 4](https://m.media-amazon.com/images/I/61lg0CiLi8L.jpg) ![HiLetgo 10PCS Kw12-3 Ac 250V 5A Spdt 1No 1Nc Micro Limit Switch Normally Open Close Limit Switch with Roller Lever Arm Black - Image 5](https://m.media-amazon.com/images/I/51+Du5sRIiL.jpg) ## Questions & Answers **Q: Can i use these with DC voltages?** A: These switches are rated at 5/120 and 3/240 AC , contacts are silver plated which is good for AC but not for DC since platting is so thin and contact resistance so good you will end up with weld contacts, I have been using these switches on 30 ma up to 500ma no problem what so ever **Q: I'm not an electronics person, so I'm not sure how to read the diagram; what are each of the terminals for? How do you wire this switch into a circuit** A: It depends on the circuit which you will be wiring the switch into. A wire needs to be connected to the (C)ommon connection opposite of the roller. You then need to determine if you need the switch in the open or closed position when the switch is not activated. I use the common and the normally open for my CNC milling machine limit switches. **Q: What are the rollers made of, metal?** A: no red plastic **Q: Any recomendation of spade Wire Connector for it? 3.3mm is odd size.** A: the connections are solder lugs, not too well suited for use with a female spade connector. The switch dimensions dictate the size of the connections, and limit them so that, when installed, the connections won't contact a mounting surface. Plus -- the nature of use, with something actuating the switch mechanically, somewhat dictates a more mechanically secure connection than you might expect with a push-on connector. If you must use one, consider a short flexible wire pigtail soldered to each terminal, then add the connector of choice to the end of that wire for your chosen connector. ## Customer Reviews ### ⭐⭐⭐⭐⭐ جيد جدا *by A***R on 26 October 2025* جيد جدا ### ⭐⭐⭐⭐⭐ Good switches for the price *by A***R on 21 January 2026* So far so good! These come in a pack of 10 which makes this a pretty good value. I cannot attest to durability since they have not been in use for long enough, but they do seem solid. Response on these seems proper. I am using them in a slightly non-conventional way (as a button of sorts) but they are doing the job nicely. ### ⭐⭐⭐⭐⭐ solid function *by M***. on 15 June 2025* Solid little micro switches. Have stood up to time and continue to work. ## Frequently Bought Together - HiLetgo 10pcs Micro Limit Switch KW12-3 AC 250V 5A SPDT 1NO 1NC Micro Switch Normally Open Close Limit Switch with Roller Lever Arm Black - WINSINN GT2 Timing Belt Pulley 16 Teeth, 5mm Bore, for 10mm Width Belt - Ideal for Automation, Robotics, Precision Machinery (5-Pack) - STEPPERONLINE 5PCS Nema 17 Stepper Motor Bipolar 2A 84oz.in 48mm 4-Lead for 3D Printer/CNC --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.us/products/715603524-hiletgo-10pcs-kw12-3-ac-250v-5a-spdt-1no-1nc](https://www.desertcart.us/products/715603524-hiletgo-10pcs-kw12-3-ac-250v-5a-spdt-1no-1nc) --- *Product available on Desertcart United States of America* *Store origin: US* *Last updated: 2026-07-07*