NXP BT Series Thyristors TO-220AB – NXP BT152-600R, A 20A 600V planar passivated Silicon Controlled Rectifier (SCR) intended for use in applications requiring good bidirectional blocking voltage capability, high surge current capability and high thermal cycling performance. Typical applications include ignition circuits, motor control, protection circuits, voltage regulation. NXP BT152-600R Thyristor 20A 600V TO220AB