Residual current circuit breaker, all-current sensitive Acti 9 iID. 4-pin,rated current 40A,Type B-SI,Nominal fault current 30mA,Operating voltage (Ue) 400 AC,50Hz,Insulation voltage 500V AC. Jumber switching for low wear switching of the contacts. With mechanical front-side fault reporting display (VisiTrip) for displaying tripping due to residual current. Reliable contact display (VisiSafe) of the error current protection switch, in case of green display Safe freedom of voltage on the output side. Test button for regular function check. Double terminals for connecting cables or phase rails on both sides. Easy removal of the individual device with installed phase rail, thanks to the front-accessible fixing element. Additional stackable auxiliary modules (optional) under-voltage release (IMN), over-voltage release (iMSU), working current release (IMX), auxiliary switch for status message (IOF), error alarm switch (ISD). Type B-SI is integrated with SI technology which offers a higher r