2SD2138AQA

Series:	--
Packaging:	Tape & Box (TB)
Part Status:	Obsolete
Transistor Type:	NPN - Darlington
Current - Collector (Ic) (Max):	2A
Voltage - Collector Emitter Breakdown (Max):	80V
Vce Saturation (Max) @ Ib, Ic:	2.5V @ 8mA, 2A
Current - Collector Cutoff (Max):	100µA
DC Current Gain (hFE) (Min) @ Ic, Vce:	2000 @ 2A, 4V
Power - Max:	15W
Frequency - Transition:	20MHz
Operating Temperature:	150°C (TJ)
Mounting Type:	Through Hole
Package / Case:	3-SIP
Supplier Device Package:	MT-4-A1
Base Part Number:	2SD2138

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2SD2138AQA is a single bipolar junction transistor, or BJT. BJTs are three-terminal semiconductor devices, consisting of a complex network of regions with different potentials within a single crystal of semiconductor material. The device is bipolar because it uses two types of conduction, called majority carriers and minority carriers. This type of BJT is used in a wide range of applications, from low-power amplifiers to larger power switching applications.The two main components of a BJT are the emitter and the collector. The emitter is the source of the majority carriers and the collector is the drain for the same. Between the two is the base, through which the minority carriers pass to the collector. When a forward voltage is applied across the base-emitter junction, a current flows from the emitter to the collector, which is known as the collector current. This collector current is the key to a BJT’s operation.A 2SD2138AQA is a PNP type BJT, meaning that the emitter and the collector are connected to a negative voltage with respect to each other and the base is connected to a positive voltage. When a positive voltage is applied to the base, it creates a field in the base region, allowing majority carriers to move from the emitter to the collector. The resulting collector current increases as the base voltage increases. This increase in current is limited by the BJT’s gain, which is determined by the base-emitter junction.2SD2138AQA is a switching transistor, meaning it is specifically used to switch a relatively large current on and off rapidly. It has a very high current gain (hfe) of up to 1000, meaning that a relatively small base current is needed to drive a relatively large collector current. 2SD2138AQA is mostly used in low-voltage, low-power amplifiers and receivers. It is also used in switching circuits and motor controls.Furthermore, 2SD2138AQA is a high-speed transistor, meaning it can switch high currents quickly. This makes it ideal for switching applications such as pulse-width modulation, frequency generation, and pulse-width position control. The transistor also has a low saturation voltage, meaning that it does not require much voltage to switch it on.Overall, 2SD2138AQA is a versatile, high-power transistor that is used in a wide range of applications. Its high current gain, low saturation voltage, and high-speed switching make it ideal for a variety of applications, from low-power amplifiers to power switching applications.

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