The ALPS SPVQ820501 is a through-hole, RoHS compliant microswitch with two terminals and an actuator. It is designed to detect when the circuit is opened, allowing for versatile control of electrical components. The switch is made of impact-resistant plastic and can withstand up to 10 million electrical cycles. Its contact system is designed for high current and low voltage use, making it suitable for applications including lamps, toy motors, and home electrical appliances. The switch is also oil-proof, dust-proof, and water-proof, making it a robust and reliable option.