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For experiments on electromagnetism, e.g. operation of a relay; Magnetic component compact system (MBC), electromagent component (relay - open design), with built-in electromagnet and external steel leaf spring; Robust plastic housing (ABS) with transparent base plate, the component is therefore clearly visible, but also protected against mechanical damageSwitch symbol printed on (screen printing) Two sockets, also suitable for 4 mm safety plugsRemovable base plate, with integrated neodymium magnetsOperating voltage: 2.7 ... 12 VClappers (steel leaf spring): L=150 mmDimensions: 84 x 84 x 39 mmMass: 191 g