S8FSG30012CD at a glance
The Omron S8FSG30012CD is a 300 W single-output DIN rail power supply in the S8FS-G series, delivering a fixed nominal 12 V at up to 25 A from an adjustable output stage. The headline 300 W / 25 A pair is sized for mid-current 12 V control cabinets — PLC backplanes, sensor bundles, and valve manifold rails where a single PSU feeds the whole 12 V bus without paralleling units.
Input range and electrical behaviour
Input is rated 85 V minimum to 264 V maximum across a 100... 240 VAC nominal band, so the same unit handles factory floors with 120 V, 200 V, or 230 V distribution without re-tapping. Efficiency is 85% and ripple-and-noise is specified at 140 mV on the 12 V rail — adequate for PLC logic and sensor supply, but for very low-noise analog front-ends the rail should still be filtered downstream. Insulation voltage is rated 3 kV, giving the input-to-output barrier typical for industrial DIN-rail PSUs and supporting the reinforced isolation expected on a control-cabinet supply.
Thermal envelope and reliability
Operating temperature spans −20 °C to 70 °C; at the upper end, expect continuous-output derating per the S8FS-G characteristic curve, with 25 A achievable in the cooler portion of the band. MTBF is published at 135000 h, which is the long-term reliability figure a maintenance planner reads when sizing spares for a fleet — a single unit on continuous duty is rated for roughly fifteen years of mean time between failures.
Footprint and panel wiring
The housing is 47.5 mm wide, 107 mm tall, and 220 mm deep on the DIN rail — a slim 25 A profile that leaves room for adjacent breakers or terminals on the same rail, with screw terminations for both input and output wiring. The 220 mm depth matters for cabinet layout: the supply will extend well behind the DIN-rail face, so the back wall of the enclosure and any gland-plate hardware need to clear it before the unit is clipped in.
Lifecycle and sourcing posture
Omron lists S8FSG30012CD at mature — still supported and orderable, but no longer the newest generation of the S8FS-G line, so buyers should expect longer factory lead times than on a freshly-launched variant.