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The BT138-600,127 is part of the NXP BIPOLAR Technology Series of single-pole, triple-throw (SPTT) semiconductor switches. This device is designed for use in the switching of power supplies, motor control, and general control applications. The BT138-600,127 has a maximum power dissipation of 1.5 W and a maximum voltage of 600 V. The current rating of this device is 6 A. It is available in the TO-220 and TO-220FP packages.