solid state relay

What Are Electrical Relays: Your 2026 Guide

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Electrical relays are electrically operated switches that let a low-power control signal open or close one or more higher-power circuits, and the technology has been foundational since the early 1800s. In practice, a relay is a lot like a manager giving a simple instruction to a powerful machine: the small control signal does the deciding, … Read more

What Is a Solid State Relay and How Does It Actually Work?

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Think of a normal light switch. You flick it, a little piece of metal moves inside, and the light comes on. Now, imagine a switch you could turn on just by shining a flashlight at it—no moving parts, no click, just instant light. That’s the basic idea behind a solid state relay (SSR). It’s a … Read more