An SMPS (Switched Mode Power Supply), is an electronic power converter that supplies stable and regulated DC voltage from an unregulated AC or DC input source. It uses high-speed switching components such as transistors or MOSFETs to convert electrical energy efficiently. In simple words, an SMPS takes the incoming power, converts it using switching and filtering circuits, and provides a steady output voltage suitable for sensitive electronic devices.
The main purpose of SMPS is to deliver reliable power to electronic and automation equipment while keeping energy loss as low as possible. Traditional power supplies waste more energy as heat, but SMPS operates with high efficiency — usually above 80% — by switching the power on and off rapidly and controlling the duty cycle to maintain a constant voltage. This makes it ideal for applications where compact design, low heat generation, and high performance are required.
In industrial automation, Omron Switched Mode Power Supply is a popular choice because it provides stable DC power to devices such as PLCs, sensors, relays, control panels, and communication modules. Models like the Omron S8VK-G and S8VK-S series are designed to handle wide input voltages, resist electrical noise, and operate reliably even under harsh conditions. The result is a cleaner, more efficient power source that keeps machines running smoothly and protects components from voltage fluctuations.
SMPS units are available in different configurations such as AC to DC, DC to DC, DC to AC, and AC to AC, depending on how the input power is converted. In automation systems, the AC to DC type is most common because it converts the incoming mains power into regulated DC output, usually 5V, 12V, or 24V DC.
The purpose of SMPS goes beyond just converting power — it ensures that sensitive electronic circuits receive constant voltage and current, improves overall energy efficiency, reduces system heat, and enhances equipment life. That’s why devices like Omron SMPS are widely used in control panels, robotics, factory automation, and communication equipment, providing dependable and efficient power for modern industrial systems.