What unique protection do power window closure modules offer that normal SPDT relays do not?

Power window closure modules provide a unique feature in the form of current limitation for automatic shut-off, which standard SPDT relays do not offer. This current limitation helps protect the window motor and associated circuitry from overheating or damage due to stalls, for instance if there’s an obstruction in the window's path. When the window encounters resistance, the module can detect the increased current draw and automatically cut off power to the motor, preventing potential failure or damage.

In contrast, standard relays do not possess the intelligence required to monitor current and react accordingly, meaning they can allow continuous operation without the safety measure of shutting off in the event of an obstruction. This feature is crucial for the safety and longevity of automotive power window systems.