Form factor and contact arrangement
The SS-5FD1 is an Omron subminiature limit switch with a Single Pole Double Throw (SPDT) contact block — one common terminal, one normally open, one normally closed, field-wired to suit either logic polarity without re-ordering a different contact body. It belongs to the Omron SS subminiature limit switch family, the snap-action position sensor typically mounted through a panel cut-out on a machine door, guard, or actuator lever — the lever's mechanical travel drives the SPDT transfer.
