ITEM NAME:10x BT151-500R SOT78 Package Motor Control SCR Thyristors 500V 12A C4D4 10x BT151-500R SOT78 Package Motor Control SCR Thyristors 500V 12A C4D4 Product Name : Thyristor Model : BT151-500R Glass passivated thyristors in a plastic envelope, intended for use in applications requiring high.RMS on-state Current : 12A. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing.