APEM INC. part 5639AB3V is a high-quality toggle switch featuring a durable locking lever and SPDT (Single Pole Double Throw) functionality for ON-OFF-ON switching capabilities. This switch is designed for panel mounting with threads and solder lug connections, making it ideal for various industrial and commercial applications. With a 4A 250VAC and 30VDC rating, this switch offers reliable performance and long-lasting durability.