1. Product Overview
This document provides instructions for the Anchilly Replacement Micro Switch, model V-5220Q. This micro switch is designed as a normally closed (NC) component, suitable for various industrial and electrical control applications where a reliable switching mechanism is required.
A micro switch is an electric switch that is actuated by very little physical force, through the use of a tipping point mechanism, sometimes called an "over-center" mechanism. The switching action is rapid and independent of the speed of the actuator.

Figure 1: The Anchilly V-5220Q Micro Switch. This image displays the compact black housing of the micro switch, featuring three terminals labeled 'COM' (Common), 'NC' (Normally Closed), and 'NO' (Normally Open). The switch also has mounting holes and a small actuator button visible on the top surface. The terminals are flat metal connectors designed for easy wiring.
2. Setup and Installation
Proper installation is crucial for the reliable operation of the micro switch. Ensure all power is disconnected before beginning installation.
- Mounting: Secure the micro switch in the desired location using appropriate fasteners through the designated mounting holes. Ensure the switch is firmly attached to prevent movement during operation.
- Wiring: Identify the terminals on the switch. This model is a Normally Closed (NC) type, meaning the circuit is closed (current flows) when the switch is not actuated.
- COM (Common): This is the common terminal for the circuit.
- NC (Normally Closed): This terminal is connected to COM when the switch is in its resting (unactuated) state.
- NO (Normally Open): This terminal is disconnected from COM when the switch is in its resting (unactuated) state. For a normally closed application, connect your circuit between COM and NC.
- Actuator Alignment: Position the switch so that the actuator button or lever is correctly aligned with the mechanism that will trigger it. Ensure the actuator can move freely and fully depress the switch without excessive force or binding.
- Testing: After installation, carefully test the switch's operation with low voltage or a multimeter before applying full power to the system.
Warning: Incorrect wiring or installation can lead to malfunction, damage to equipment, or electrical hazards. Consult a qualified electrician if you are unsure about any part of the installation process.
3. Operating Principles
The Anchilly V-5220Q Micro Switch operates on a snap-action mechanism. As a Normally Closed (NC) switch, its default state (when not actuated) maintains a closed circuit between the COM and NC terminals. When the actuator is pressed, the internal mechanism quickly switches, opening the circuit between COM and NC, and simultaneously closing the circuit between COM and NO (if connected).
The "normally closed" designation means that the electrical contacts are closed when the switch is in its default, unactuated position. Pressing the actuator opens these contacts.
The snap-action design ensures a rapid and consistent switching action, regardless of the speed at which the actuator is pressed, which helps to minimize contact bounce and extend switch life.
4. Maintenance
The Anchilly V-5220Q Micro Switch is designed for long-term, reliable operation with minimal maintenance. However, periodic checks can help ensure optimal performance:
- Visual Inspection: Regularly inspect the switch for any signs of physical damage, corrosion on terminals, or loose connections.
- Actuator Check: Ensure the actuator mechanism moves freely and returns to its original position without sticking. Clean any dust or debris that might impede its movement.
- Environmental Conditions: Verify that the operating environment remains within the specified temperature and humidity ranges to prevent premature wear or failure.
- Cleaning: If necessary, gently clean the exterior of the switch with a dry, soft cloth. Avoid using harsh chemicals or solvents.
No internal user-serviceable parts are present. Do not attempt to disassemble the switch.
5. Troubleshooting
If the micro switch is not functioning as expected, consider the following troubleshooting steps:
- No Response:
- Check all wiring connections for looseness or incorrect placement.
- Verify that power is supplied to the circuit.
- Ensure the actuator is fully depressing the switch button.
- Test the switch continuity with a multimeter (disconnect power first).
- Intermittent Operation:
- Inspect for loose wires or poor contact at the terminals.
- Check for debris or obstruction around the actuator.
- Ensure the mounting is secure and the switch is not vibrating excessively.
- Switch Stuck:
- Examine the actuator mechanism for physical damage or foreign objects.
- Ensure the switch is not being over-actuated beyond its design limits.
If issues persist after troubleshooting, the switch may need to be replaced.
6. Specifications
| Feature | Detail |
|---|---|
| Model | V-5220Q (Replacement for Yamatake V-5220Q) |
| Brand | Anchilly |
| Switch Type | Micro Switch |
| Contact Configuration | Normally Closed (NC) |
| ASIN | B0CV4BWYV8 |
| Manufacturer | Anchilly |
| Date First Available | February 6, 2024 |
7. Warranty and Support
For warranty information or technical support regarding your Anchilly Replacement Micro Switch V-5220Q, please refer to the seller's policies or contact Anchilly customer service directly. Contact details are typically provided with your purchase documentation or on the manufacturer's official website.
Please retain your proof of purchase for warranty claims.