A Comprehensive Guide: Wiring a 4-Pin LED Push Button Switch


Wiring a 4-pin LED push button switch requires a clear understanding of the components and a systematic approach to ensure a successful installation. In this article, we will provide a step-by-step guide on how to wire the PLE Series illuminated, round push button switch, known for its momentary contact pushbutton functionality with a single-pole, single-throw (SPST) circuit. With its multiple LED color options, panel mount design, and durability, this switch finds applications in various industries, including computer servers, performance audio, instrumentation, telecommunications, and networking. Let’s delve into the wiring process and unleash the potential of this versatile switch.

Components and Precautions:

Before proceeding with the wiring process, it’s important to understand the components and take necessary precautions. The PLE Series illuminated switch is a panel mount push button designed for an 8mm diameter round cutout. It features a 4-pin configuration for the wiring connections. Ensure that you have a clear understanding of the switch’s pin layout and consult the manufacturer’s documentation for specific details on your switch model.

Wiring Instructions:

Follow these steps to wire your 4-pin LED push button switch:

Step 1: Preparation:

Begin by gathering the necessary tools and materials, including appropriate wire gauges, a soldering iron, solder, heat shrink tubing (if desired), and a power source. Ensure that the power is disconnected before starting the wiring process.

Step 2: Identify the Pins:

Identify the four pins on the switch, which are typically labeled or color-coded for easy identification. These pins are usually labeled as follows: LED Anode (+), LED Cathode (-), NO (Normally Open), and COM (Common).

Step 3: Wiring the LED:

Connect the LED Anode (+) pin to the positive (+) terminal of your power source. Connect the LED Cathode (-) pin to the negative (-) terminal of your power source. This wiring enables the LED illumination when the switch is activated.

Step 4: Wiring the Circuit:

For the momentary pushbutton functionality, connect the NO (Normally Open) pin to the desired circuit or load. This pin will remain open when the switch is not pressed and will close the circuit when the switch is pressed. Connect the COM (Common) pin to the opposite end of the circuit or load, completing the circuit when the switch is pressed.

Step 5: Secure Connections:

Ensure that all connections are properly soldered or securely fastened. Double-check for any loose wires or exposed conductors. If desired, apply heat shrink tubing to insulate and protect the connections.

Step 6: Testing:

Before finalizing the installation, conduct a thorough testing process. Apply power to the switch and verify that the LED illuminates when the switch is pressed, and the circuit functions as intended.


Wiring a 4-pin LED push button switch, such as the PLE Series illuminated switch, requires attention to detail and adherence to the correct pin configuration. By following the provided step-by-step instructions, you can successfully wire the switch for its momentary pushbutton functionality and LED illumination. Remember to prioritize safety precautions, consult the manufacturer’s documentation, and test the switch’s operation before completing the installation. With its versatility and durability, the PLE Series illuminated switch is ready to enhance your applications in various industries.

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