The Y100AA2C203NQ is a Y Series single-pole, 4-position tumbler switchlock designed for secure access control. It features a 4-tumbler lock mechanism with a detent, a stainless steel facing, and is supplied with two nickel-plated brass keys. The switch provides 45-degree indexing between positions, with the key being removable in positions 1, 2, and 3. Its silver-plated copper contacts are rated for 4A at 125V AC or 28V DC and are connected via solder lug terminals. With an electrical life of 10,000 cycles, this switchlock is suitable for applications such as point-of-sale terminals, cash registers, and computers.