Siemens 52SA2AAB Selector Switch With Contact Block

Siemens 52SA2AAB is a 30 mm panel‑mount, two‑position selector switch that ships with a 52BJK contact block, delivering one normally open and one normally closed contact for a compact two‑circuit control function. The unit is non‑illuminated and part of Siemens' Class 52 pilot devices, designed for industrial control panels where a durable, hands‑on selector is used without lighting. The 52BJK block mounts to the operator and provides the NO/NC configuration that switches in step with the lever position, enabling straightforward signaling, interlocks, or start/stop wiring in equipment. With its standard 30 mm form factor, this combination is well suited for machine‑control panels, process equipment, and other industrial applications requiring a simple two‑position selector switch with a paired NO/NC contact block.