② DC resistance: refers to the DC resistance of the coil of the relay, which can be measured through a multimeter.
③ Inhalation current: refers to the minimum current that can generate suction and combination. In normal use, the given current must be slightly greater than the suction current, so that the relay can work stably. For the working voltage of the coil, generally do not exceed 1.5 times the rated operating voltage, otherwise it will generate a large current and burn the coil.
④ Release current: refers to the maximum current of the release of relay to release. When the current of the relay suction state is reduced to the degree of definition, the relay will return to the unpopular release state. At this time, the current is far less than the suction current.
⑤ contact switching voltage and current: refers to the voltage and current allowed to be loaded by relay. It determines that the relay can control the voltage and current, and it cannot exceed this value during use, otherwise it will easily damage the contact of the relay.
