BDX33C-S

Series:	--
Packaging:	Tube
Part Status:	Obsolete
Transistor Type:	NPN - Darlington
Current - Collector (Ic) (Max):	10A
Voltage - Collector Emitter Breakdown (Max):	100V
Vce Saturation (Max) @ Ib, Ic:	2.5V @ 6mA, 3A
Current - Collector Cutoff (Max):	10mA
DC Current Gain (hFE) (Min) @ Ic, Vce:	750 @ 3A, 3V
Power - Max:	2W
Frequency - Transition:	--
Operating Temperature:	-65°C ~ 150°C (TJ)
Mounting Type:	Through Hole
Package / Case:	TO-220-3
Supplier Device Package:	TO-220

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Introduction to BDX33C-S

The BDX33C-S is a widely used transistor in the field of semiconductor materials manufacturing. It is a single-bipolar transistor, which is classified as low-power and low-noise type. It is widely used in circuit applications such as voltage regulators, audio amplifiers and current controllers. This transistor is also known as the Sanken original part number SK9911. It is a PNP type, meaning it requires a negative voltage to be applied for the base current to turn the transistor on. The collector-emitter voltage between the three pins is rated at up to 33volts. The maximum collector current rating for this device is 0.4amp. The maximum permissible power dissipation for the transistor is 0.8W, and the minimum operating junction temperature is -45°C. This device is often used in applications such as pre-amplifier, audio amplifier and power supply circuit. The transistor is highly reliable and has been extensively used in automotive applications as well.

Working Principle of BDX33C-S

The working principle of the BDX33C-S transistor is based on the operation of the bipolar junction. In this type of transistor, electrons and holes, the mobile charge carriers in semiconductors, control the behaviour of current in the device. The transistor has three terminals called emitter, collector and base. Though the base and emitter have a very small physical width, the current that flows through these terminals is determined by the amount of voltage applied on the base. The amount of voltage applied determines the amount of current that flows from the emitter to the collector in a PNP transistor, or from the collector to the emitter in an NPN transistor. When a negative voltage is applied to the base of the BDX33C-S transistor, it turns it on, that is, it allows the flow of current from the collector to the emitter. The more negative the base voltage, the higher the collector current flows, meaning that the transistor amplifies the voltage applied at the base. The principle of current amplification is used in many applied circuits. The amount of current amplification and the time needed for the transistor to switch on and off are determined by the collector-emitter voltage, the base current and the collector current. The thermal characteristics of the device must also be taken into account.

Applications of BDX33C-S

The BDX33C-S transistor is a versatile device that can be used in a variety of applications. One of the most common applications of this device is in voltage regulating circuits. This device can be used to form precision bias in a regulated power supply circuit. It can also be used to form an emitter follower configuration and provide low-noise amplification of AC or DC signals. The transistor is also used in pre-amplifier circuits, where it can be used to increase the amplitude of an input signal before reaching the actual amplifier stage. It is also used in audio power amplifiers, where it provides voltage amplification of low-level signals. Another application of the transistor is in current controllers. This device can be used in circuits such as DC-DC converters, motor control and other processes where current is needed to be limited or varied in a range for different operations.

Conclusion

The BDX33C-S transistor is a widely used device in many industries. It is a low-noise single-bipolar transistor that is used in circuit applications such as voltage regulators, audio amplifiers and current controllers. The BDX33C-S works based on the principles of bipolar junction, where electrons and holes control the behaviour of current in the device. The transistor can be used in a variety of applications, from pre-amplification of low-level signals to current controllers in DC-DC converters.

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