Sourcing reality for the D4C1203
The Omron D4C1203 sits in a mature lifecycle stage, which in Omron's limit-switch book typically means the catalog code is still orderable but no longer the focus of new design-ins — the working channel for replenishment is independent distribution rather than factory-direct stock. Buyers chasing the D4C1203 should treat it as a quoted-to-order line: confirm availability, current pricing, and any minimum order quantity at RFQ time, since neither stock nor a published price is asserted here.
Ratings that decide fit in the panel
The headline switching envelope is 5 A at 250 V AC and 4 A at 30 V DC on a single-pole double-throw (1CO) contact set, which covers the standard motor-auxiliary and solenoid-auxiliary loads found in conveyor and door-interlock circuits; insulation is rated to 300 V. The cross roller plunger actuator needs 12 N of operating force to trip the contact — meaningful when the cam or dog driving the switch is on a light-duty mechanism, since under-rated trip force leads to missed actuations on worn hardware.
Housing, sealing, and how it lands on the machine
A metal body with IP67 sealing and a 3 m hardwired cable puts the D4C1203 in the washdown and outdoor-compatible tier of Omron's limit-switch line — the rating means the body and cable entry keep water out under temporary immersion, not continuous submersion. With cable-out termination rather than a plug connector, the installer glands the supplied 3 m lead directly into the panel — there is no mating connector to specify separately, but the cable length is fixed, so plan the routing path or accept the lead as-is.