Switching of inductive loads

When switching off inductive loads, high induction voltages result from interrupting the current too quickly. These are limited by an integrated free-wheeling diode (see Technical data for switching-off energy). Since the current only reduces slowly, a delayed switch-off can occur in many control applications. For example, a valve remains open for several milliseconds. The switch-off times correspond, for instance, to the switch-on time of the coil.

	Protection against high induction voltages To prevent voltage spikes when switching off inductive loads, we recommend installing appropriate protective circuits (e.g., using a free-wheeling diode, RC circuit, or varistor) directly on the actuator.