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A latching relay can maintain the contact even if the voltage applied to the relay coil is turned off. Latching relays can be either single-winding or double-winding.

The holding force (coercive force) of a latching relay may decrease over time, and the set state may be released due to a decrease in the holding force. The decay rate with respect to the elapsed time depends on the surrounding environment. Refer to “Attenuation of holding force” data.

The conditions are different from those for relays for PCB. Perform soldering based on the reflow soldering in the Explanation.

For soldering conditions of surface mount relays, refer to “Automatic mounting of relays for PCB,” surface mount relays in “Safety precautions for all relays.”

When operating with a microload, use the applicable load condition of the failure rate P level (reference value) as a guide.

Relays are available in flux-resistant, plastic-sealed, and closed types. The sealed relay is plastic sealed.

The conditions are different from those for relays for PCB. Perform soldering based on the flow soldering in the Explanation.

Possible causes differ for AC relays and DC relays. Refer to Explanation for details.

The back electromotive force generated by the coil when it’s turned off may cause damage to the semiconductor or device malfunction. As a countermeasure, add a surge-absorbing circuit to both ends of the coil. If a surge-absorbing circuit is added, the relay release time will be longer. Check the circuit before use.

Since power relays consume more coil power and have higher contact ratings than signal (communication) relays, they are easily affected by heat between relays in close mounting. They must be mounted at certain intervals.