抑制各种感性负载切换或各种瞬间噪声在电路板中产生的EFT和浪涌电压。
Suppression of Inductive Switching or Other Transient Events Such as EFT and Surge Voltage at the Circuit Board Level.
选择性：继电器对诸如系统瞬间切换或负载突变之类的无害的异常情况不作反应。
Selectivity: The relay must not respond to abnormal, but harmless, system conditions such as switching transients or sudden changes in load.
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