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The SM4000 is a 4000V/1A rectifier diode in DO-213AB Melf package. It is ideally suited for input rectification of devices connected directly to the public mains, e. g. Smart Electricity Meter, LED Street Lamps and 4G/5G Base Stations. All these devices are rated for a surge voltage of 6 kV. The usually inserted mains filter reduces this value to about 2 kV; actually available 2000 V rectifiers are "at the edge" under this load. As a consequence, two of such diodes are placed in series to increase safety margin.

The SM4000 offers in a single package a V_RRM of 4000 V and thus a comfortable "built in" safety margin. Instead of using 16 diodes in a typical Smart Meter input stage, the amount of components can be reduced to eight. And all with no compromise in safety margin.