The APEM Inc. part 401ZBE is a reliable and versatile push button switch designed for various applications. It features a round plunger and a normally open, single-pole single-throw (SPST) configuration. With a low voltage rating of 20VAC and 20VDC, it is suitable for both AC and DC circuits. The switch has a low power rating of 0.4VA, making it energy-efficient and cost-effective. It offers momentary contact, ensuring a temporary electrical connection when the button is pressed. The solder lug panel mount enables easy installation onto circuit boards or panels, making it convenient for integration into different systems. With its durable construction and high-quality design, this push button switch provides reliable operation for a wide range of industrial and commercial applications.