Omron S82K-00305 Power Supply AC100-240V New S82K00305

Omron S82K-00305 | S82K Series 3W DIN Rail Switching Power Supply — 5V DC / 0.6A / 100–240V AC / Class 2

3W at 5V DC — The Compact Logic Supply in the S82K Range

The S82K-00305 is the 5V DC, 3W member of Omron's S82K switching power supply family — the smallest output power in the S82K series and the only variant specifically producing 5V DC at 3W. At 100–240V AC wide-range input, it requires no manual voltage selection and operates across the full global AC mains range. With 0.6A available at 5V DC, it provides enough current for small logic boards, sensor power, signal conditioning circuits, and microcontroller systems that draw below this threshold.

The Class 2 classification indicates the supply meets Class 2 output requirements — the output is current-limited and power-limited such that it cannot sustain a hazardous arc or fire under fault conditions. This classification simplifies wiring code compliance for the load-side wiring in many jurisdictions where Class 2 power levels permit reduced wiring protection requirements.

At 3W, this is a purpose-specific supply for logic-level loads, not a general 5V rail for high-current applications. The S82K-00705 (7.5W, 5V, 1.5A) and S82K-01505 (15W, 5V, 2.5A) provide higher current at 5V within the same S82K family if the load requires more than 0.6A.

Key Specifications

S82K Family Context — Selecting by Power Rating

The S82K series spans from 3W to 240W across multiple output voltages (5V, 12V, 15V, 24V). All models share the universal 100–240V AC input and the same DIN rail mounting format. When the application load requires more than 0.6A at 5V DC, the next steps in the S82K 5V range are:

Confirm the load's maximum continuous current draw before specifying the supply — a 3W supply running at continuous maximum current operates at its thermal limit.

FAQ

Q1: What is Class 2 power classification and why does it matter?

Class 2 is a UL/NEC power classification indicating the supply output is current-limited and power-limited to levels that cannot sustain a hazardous arc or fire under normal fault conditions. The S82K-00305 meets Class 2 output requirements at 3W. In many NEC-governed installations, Class 2 wiring on the load side can use lighter-gauge conductors and reduced conduit/protection requirements compared to non-Class 2 power, simplifying installation.

Q2: The 5V supply output is 0.6A. Is this enough for a PLC logic supply?

It depends on the specific PLC and its power budget. Small PLCs and controllers with low I/O counts can run from 0.6A at 5V (3W). Higher-density PLCs with more I/O, special function modules, or external 5V loads typically draw more. Check the PLC's 5V bus current specification before specifying the S82K-00305 — use the S82K-00705 or S82K-01505 for higher-current logic supplies.

Q3: Does the S82K-00305 require a range selector for 110V vs 230V input?

No. The wide-range input accepts 100–240V AC automatically without any range selection or link change. This universal input covers 100V Japanese and North American supplies and 220–240V European supplies with the same unit and wiring.

Q4: What happens when the load exceeds 0.6A on the S82K-00305?

The overload protection circuit activates, reducing or shutting off the output to protect both the supply and the load. Remove the overload condition and cycle power to restore output. Running the supply at sustained overload risks damaging internal components even if the protection circuit is operating — confirm total load current stays within the 0.6A rating.

Q5: Is the S82K-00305 still in production, and is there a current Omron equivalent?

The S82K series production status should be verified with current Omron documentation. For current applications, Omron's S8FS and S8VK series provide equivalent or improved performance in similar DIN rail formats. The S8FS-C03505 provides 5V DC / 0.6A / 3W with CE, UL, and KC certification as a current equivalent within Omron's product range.