This type of switch is a staple in DIY electronics, automotive projects, and industrial panels. It’s designed for simplicity and visibility, making it a reliable choice for "main power" or "mode selection" toggles.

Here is a breakdown of what makes this specific SPST Latching Red Round Switch tick:

Key Specifications & Features

1. Mechanical Action: Latching

Unlike a momentary switch (which only stays "on" while you press it), a latching switch works like a standard light switch.

• Press once: It clicks and stays in the "ON" position.

• Press again: It clicks back out to the "OFF" position.

2. Configuration: SPST (Single Pole Single Throw)

This is the simplest circuit type. It has two terminals and acts as a basic bridge in your wire.

• OFF: The bridge is up; the circuit is broken.

• ON: The bridge is down; electricity flows through.

3. Physical Profile

• Shape: Round/Circular head for easy mounting in drilled holes.

• Size: "Big Size" usually refers to a mounting diameter of 16mm to 22mm, offering a large surface area that is easy to hit even with gloves on.

• Color: Bright Red—perfect for high-visibility functions or emergency stops (though note this is a standard toggle, not a dedicated "E-Stop" mushroom button).