A127S1YZQ is a miniature toggle switch designed for compact electronic applications requiring reliable switching functionality. The switch features a single-pole, double-throw (SPDT) configuration with epoxy-sealed PC terminals supplied as standard, providing protection against environmental contamination. Available terminal spacing options include 0.100" and 0.150" spacing (AV1 and AV2 variants), accommodating various PCB layout requirements. The switch incorporates a 105 mm diameter bushing with a 25° mounting angle and operates at position "C" as the neutral position. Key dimensional specifications include a 0.073" diameter terminal pin and mounting bracket width of 0.312" (7.9 mm), making it suitable for space-constrained applications in industrial control, instrumentation, and consumer electronics where compact switching solutions are required.