What is the use of BD140 transistor?

BD140 is a PNP bipolar junction transistor that is used to drive loads under 1.5A. It comes with three terminals known as emitter, collector, and base. The small current at the base side is used to produce large output current at the emitter and collector terminals.

What is D882 transistor?

The D882 is an NPN transistor that can handle voltages of up to 30V and currents of up to 3A, with a peak current of 6A for pulses of less than 5ms. In the diagram below, two D882 application circuits are depicted.

How do I convert PNP to NPN?

If you have the exact NPN equivalent you only need to mount the circuit as it is drawn, so that the base, collector and emitter terminals of the NPN are connected where base, collector and emitter of the PNP should go, and then reverse the power supply polarity.

Why do we use 2N3055 transistor in regulator?

You want to use a DC regulator or learn about voltage regulators using 2N3055. Why use this transistor? Normally, it can be used with loads that require a current not exceeding 2A and a voltage of not more than 30V. This is enough for general work.

What is bd140 transistor?

The BD140 is silicon epitaxial planar PNP transistors in Jedec SOT-32 plastic package, designed for audio amplifiers and drivers utilizing complementary or quasi-complementary circuits.

When to use Darlington transistors for power supply?

When large currents or voltages need to be controlled, Darlington Transistors can be used. Though the best choice for power transistors is BD139 and BD140 but if they are not available then you may also go for BD135 and BD136 which are NPN and PNP transistors respectively but preference must be given to BD139/140 pair.

What are the technical specifications of bd139 transistors?

Technical Specifications of BD139 Transistors are: 1) Transistor Type: NPN 2) Max Collector Current (IC): 1.5A 3) Max Collector-Emitter Voltage (VCE): 80V

What is the switching frequency of a power transistor?

3)The power transistor can be operated at switching frequencies in the range of 10 to 15 kHz. 4)ON-state voltage drops across the power transistor are low. It can be used to control the power delivered to the load, in inverters and choppers. 1) The power transistor cannot be operating satisfactorily above the switching frequency of 15 kHz.

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