4009-04PU – OUPIIN

The OUPIIN 4009-04PU is a four-position DIP switch featuring a blue actuator. This through-hole mount component utilizes a bifurcated contact design for enhanced reliability and wiping action, ensuring a secure electrical connection across its rated lifespan. Contact resistance is typically specified at less than 50 milliohms. The switch body is constructed from a high-temperature thermoplastic, likely UL94V-0 rated for flammability, enabling compatibility with reflow soldering processes. Actuation force is nominally between 300 and 800 grams, providing tactile feedback during switching. The 4009-04PU is designed for low-current, low-voltage applications, typically rated for 24VDC at 25mA. It is commonly used for address setting, configuration, and logic selection on printed circuit boards.