![]() ![]() The dimension of the SOT-23 Package is shown below. If you are looking for a through hole type then consider 2N2222A. The BT3904 is an SMD Transistor and is available in SOT-23 Package. Driver Modules like Relay Driver, LED driver etc.The transistor also has an equivalent PNP transistor called MMBT2907A, both combined together can be used to form push pull circuits or Class B amplifier Designs. This transistor is the SMD equivalent for the popular 2N2222A transistor, which his commonly used in many switching circuits to control low current loads like pumps, solenoids, LEDs etc. The maximum voltage across the load that is getting switched is 40V. To bias a transistor we have to supply current to base pin, this current (IB) should be limited to 5mA with a base emitter voltage of 6V. The maximum amount of current that could flow through the Collector pin is 600mA, hence we cannot connect loads that consume more than 600mA of continuous current and 800mA of peak current. BT222A has a maximum gain value of 300 this value determines the amplification capacity of the transistor. It is suitable for use in driver stages, low noise input stages, and signal processing circuits of television receivers. Note: Complete Technical Details can be found at the datasheet given at the end of this page.īC549, BC636, BC639, 2N2222 TO-92, 2N2222 TO-18, 2N2369, 2N3055, 2N3906, 2SC5200īT2222A is a NPN transistor hence the collector and emitter will be left open (Reverse biased) when the base pin is held at ground and will be closed (Forward biased) when a signal is provided to base pin. BC109 Pinout BC109 Description The BC109 is a silicon planar epitaxial NPN transistor in the TO-18 metal case. Rise and Fall time is 25ns and 60ns respectively. ![]() Continuous Collector current (IC) is 600mA.This Transistor is commonly used in low power switching devices where space is a constraint. It has a collector current of 0.6A and Collector Emitter voltage of 40V. The MMBT2222A is the SMD (SOT-23) version of the popular 2N2222A Transistor. ![]()
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