1. Rated working voltage refers to the voltage required by the coil when the buy relays work normally. Depending on the model of the relay, it can be either AC or DC voltage.

2. DC resistance refers to the DC resistance of the coil in buy relays, which can be measured by a multimeter.

3. The pull-in current refers to the minimum current that buy relays can produce a pull-in action. In normal use, the given current must be slightly larger than the pull-in current, so that the relay can work stably, and the working voltage applied to the coil should generally not exceed 1.5 times the rated working voltage, otherwise a larger current will be generated. Burn the coil.

4. The release current refers to the maximum current that the buy relays produce the release action. When the current in the pull-in state of the relay is reduced to a certain level, the relay will return to the unpowered release state. The current at this time is much smaller than the pull-in current.

5. Contact switching voltage and current refer to the voltage and current allowed to be loaded by buy relays. It determines the magnitude of the voltage and current that the relay can control, and this value cannot be exceeded during use, otherwise it is easy to damage the contacts of the relay.