50 W, 5 VDC DIN-rail supply for control-loop and logic power
The Omron S8FSG05005CD is a single-phase DIN-rail switching power supply delivering 50 W at 5 VDC and 8 A from a 100 to 240 VAC input. The 5 V rail is the standard logic level for PLC backplanes, microcontroller-based controllers, and sensor supply in 24 V-dominated panels — so this unit fits where a dedicated low-voltage bus is needed without a separate step-down converter. The switching topology keeps the enclosure compact at 1.66 in wide by 3.23 in tall by 5.39 in deep, leaving room alongside 24 V supplies on the same DIN rail. The aluminum and stainless steel housing handles the thermal load without derating across the full -4 °F to 158 °F operating range.
Approvals and compliance — UL 508 listing, SEMI F47 ride-through
The S8FSG05005CD carries UL 508 listing for industrial control panel use, cUL and cUR marks for Canada, and VDE certification. The SEMI F47-0706 compliance at 200 VAC input means the supply rides through voltage sags down to 50 % of nominal for 200 ms — a requirement for semiconductor fab equipment that a standard industrial supply often lacks.
Output characteristics — ripple, hold-up, and protection
Maximum output noise is 40 mV, which is within the tolerance of most 5 V logic supplies — no additional post-filtering needed for typical PLC or sensor loads. Hold-up time is a minimum of 14 msec at nominal load, extending to 75 msec under lighter loading, enough to ride through a half-cycle dropout at 50/60 Hz. Built-in overload and overvoltage protection with automatic reset means the supply recovers after a fault clears without manual intervention — useful for remote or unmanned panels. The green LED status indicator gives a local visual of output presence.
Wiring and integration
Screw terminals accept 20 AWG to 12 AWG wire. The input frequency range spans 47 Hz to 450 Hz, covering standard 50/60 Hz mains and higher-frequency shipboard or generator supplies. Maximum inrush current is 28 A — coordinate with a Type C or D miniature circuit breaker on the primary side to avoid nuisance tripping. Start-up time is 1,000 msec maximum, so the controlled equipment sees a clean power-on sequence. MTBF is rated at 135,000 hours, and maximum efficiency reaches 82 % at 230 VAC.