October 31, 2026

An emergency stop push button is a latching control device that stops a machine when a person hits it, and stays stopped until somebody deliberately resets it. Two properties make it different from every other button on the panel: it latches in the operated position, and its contact opens by positive mechanical action rather than […]

A star delta switch changes a six-terminal motor from star to delta while it is running up, so that the motor starts on a reduced voltage and then runs on full voltage. In star each winding sees phase voltage; in delta each winding sees line voltage. That single change is what drops the starting current, […]

A motor reversing switch changes the direction of a three-phase motor by swapping two of the three phases. It has three positions — forward, off, reverse — and the handle has to pass through off before it can reach the other direction, which is what makes the changeover safe rather than a race between two […]

Choosing between rotary switch types is usually framed as a question of appearance, and that is where panel builds go wrong. A selector switch, a cam switch, a load-break isolator and a changeover switch can share the same 22 mm shaft, the same square bezel and the same handle. What separates them is not the […]

A push button switch pinout tells you what each terminal on the back of the button actually does. On a 22 mm industrial button there are no numbered “pins” in the electronics sense. There are screw terminals on one or more contact blocks, and the number printed next to each screw is a code, not […]