The BS250 is a P Channel enhancement mode vertical D-MOS transistor manufactured in TO-92 package. The pin configuration of the transistor is as follows: The first pin is Source, second pin is Gate and the third pin is Drain.
The CD4020BM, CD4020BE, are ripple-carry binary counters. All counter stages are master-slave flip-flops state of a counter advances one count on the negative transition of each input pulse a high level on the RESET line resets the counter to its all zero
This XL4015-based voltage converter is a 180 KHz fixed frequency PWM buck (step-down) DC/DC module with Constant Voltage and Constant Current control, capable of driving a 5A load with high efficiency, low ripple, and excellent line and load regulation.
The BD244C, BD-244, 244 is a 6A, 100V 65W PNP Bipolar Power Transistor is designed for use in general purpose amplifier and switching applications. BD243B, BD243C (NPN); BD244B, BD244C (PNP) are complementary devices.