How do you use a power transistor?
How do you use a power transistor?
Attach high-current load (i.e. the motor or light) to its power source, and then to the collector of the transistor. Then connect the emitter of the transistor to ground. Then to control the motor, you apply voltage to the transistor’s base.
Can I use BD139 instead of BC547?
You can’t use BC547 or 548 in the place of BD139. Because BD139 used for High current Load (500ma to 1A) at the collector. BD139 has the maximum current load capacity of 1A, But BC 547 used for the low current load (up to 100ma).
What is power transistor?
What Are Power Transistors? Power transistors are three terminal devices which are composed of semiconductor materials. They feature emitter, base and collector terminals. These devices are particularly designed to control high current – voltage rating.
Why are transistors important?
Transistors make excellent electronic switches. They can turn currents on and off billions of times per second. Digital computers use transistors as a basic mechanism for storing and moving data.
Why is BC547 used?
BC547 is usually used for current amplifier, quick switching and pulse-width modulation (PWM). Therefore, if you need to control the speed of a motor or actuator in some of your projects, you can simply use this transistor to achieve it.
What is bd139 used for?
The BD139 was originally manufactured by Phillips rated at 160MHz for specific audio applications, later they were cloned by other manufacturers like Samsung, ST etc. Being a Medium Power NPN Transistor with a collector current of 1.5A this transistor can be used to control (On/Off) bigger loads that consume less than 1.5A.
What is the use of control transistor in a bd139?
Controls the biasing of transistor, Used to turn ON or OFF the transistor. BD139 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
What is the gain value of the bdbd139?
BD139 has a gain value of 40 to 160, this value determines the amplification capacity of the transistor. The maximum amount of current that could flow through the Collector pin is 1.5A, hence we cannot connect loads that consume more than 1.5A using this transistor.
Is there an SMD version of the bd139?
SMD Equivalent The SMD version of the BD139 is available as the BCP56 (SOT-223). Replacement and equivalent transistor for the BD139 You can replace the BD139 with the BD139G, BD169, BD179, BD230, BD237, BD237G, BD379, BD789, BD791, MJE242, MJE244or MJE722.
