10-Pack Mini Micro Limit Switch Roller Lever SPDT Snap Action
10-Pack Mini Micro Limit Switch Roller Lever SPDT Snap Action
10-Pack Mini Micro Limit Switch with Roller Lever Arm – SPDT Snap Action
Get reliable, repeatable switching performance with this set of 10 Mini Micro Limit Switches. Featuring a Single Pole Double Throw (SPDT) configuration with both Normally Open (NO) and Normally Closed (NC) contacts, these compact snap-action switches are ideal for hobbyists, engineers, and DIY electronics projects alike. Made in Mainland China.
Key Features
- SPDT Snap Action: Instantaneous contact change at the trip point ensures clean, reliable switching every time.
- Hinge Roller Lever Actuator: Smooth, consistent actuation makes these switches easy to integrate into mechanical systems.
- Momentary Action: Contacts return to their original position once the actuator is released — perfect for position sensing and limit control.
- 3-Pin Terminal Design: Simple wiring with Common (COM), Normally Open (NO), and Normally Closed (NC) terminals.
- Compact Form Factor: Overall size of just 20 × 6 × 10 mm (L×W×H) — fits into tight spaces with ease.
- Hysteresis / Differential Travel: Separate trip and reset points help prevent false triggering caused by vibration.
- Wide Application Range: Compatible with electronic equipment, door interlocks, microwave ovens, refrigerators, conveyor systems, and more.
Technical Specifications
| Product Type | Micro Limit Switch |
| Voltage & Current Rating | AC 125V, 5A |
| Contact Type | SPDT — 1 NO + 1 NC + 1 COM |
| Action Type | Momentary (Snap Action) |
| Actuator Type | Hinge Roller Lever |
| Terminal Type | 3-Pin |
| Overall Size | 20 × 6 × 10 mm / 0.8" × 0.2" × 0.4" (L×W×H) |
| Roller Lever Length | 18 mm / 0.7" |
| Roller Diameter | 4.5 mm / 0.2" |
| Mounting Hole Diameter | 2 mm / 0.08" |
| Mounting Hole Spacing | 9 mm / 0.35" |
| Material | Plastic & Metal |
| Color | Black, Red, Silver Tone |
| Net Weight | 22 g (per set of 10) |
How Snap Action Contacts Work
In snap action contacts, the actuator applies force to an over-center mechanism. This mechanism produces an instantaneous change in contact state the moment the trip point is reached — regardless of how slowly the actuator moves. Reversing the actuator to the reset point causes the contacts to snap back to their original position. The distance between the trip and reset points (known as hysteresis or differential travel) prevents multiple false triggers when the actuating object is subject to vibration, ensuring stable, repeatable performance in demanding applications.
Package Contents
- 10 × Mini Micro Limit Switch (Roller Lever, SPDT, Snap Action)
Note: Due to lighting conditions and display settings, the actual color may vary slightly from the images shown. Dimensional measurement tolerance: ±1–3 mm.
Learn more: OSHA guidance on hand and power tools
Frequently Asked Questions
Q: What is the voltage and current rating for these micro limit switches?
A: Each mini micro limit switch in this 10-pack is rated for AC 125V at 5A, making them suitable for a wide range of low-voltage control and automation applications including appliance interlocks and electronic equipment.
Q: What does SPDT mean and how do I wire these snap action switches?
A: SPDT stands for Single Pole Double Throw. Each switch has three terminals: COM (Common), NO (Normally Open), and NC (Normally Closed). Wire between COM and NO for a circuit that closes when the lever is actuated, or between COM and NC for a circuit that opens when the lever is actuated.
Q: Are these micro limit switches suitable for DIY robotics or CNC machine projects?
A: Yes! These compact snap-action roller lever switches are widely used in CNC machines, 3D printers, robotics, conveyor systems, and home appliance interlocks. Their momentary action and reliable snap mechanism make them excellent for position sensing and end-stop applications.
Production & Packaging Notice
To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.