Let’s discuss the question: how to replace a transistor. We summarize all relevant answers in section Q&A of website Myyachtguardian.com in category: Blog MMO. See more related questions in the comments below.
Table of Contents
How do you replace a transistor?
- Choose a transistor of the same polarity: The first major selection criterion is whether the transistor is PNP or NPN.
- Select a replacement transistor of the same material: Most transistors are either silicon or germanium.
Can I replace a transistor with any other transistor?
The first factor that should be considered when substituting a transistor is the charge of the transistors. A transistor that has a positive-negative-positive charge (PNP) must be substituted with a PNP type transistor. Likewise, a negative-positive-negative (NPN) transistor must be substituted with an NPN transistor.
Desoldering Part Three – Replace a Transistor
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How do I choose the right transistor?
- The transistor’s maximum collector current must be greater than the load current.
- The transistor’s maximum current gain must be at least 5 times the load current divided by the maximum output current from the IC.
Can I replace transistor with MOSFET?
In general we can easily replace a BJT with a MOSFET, provided we take care of the relevant polarities. For an NPN BJT, we may replace the BJT with a correctly specified MOSFET in the following manner: Remove the base resistor from the circuit because we don’t typically need it anymore with a MOSFET.
Can diode be used to replace a transistor?
Since a bipolar transistor is essentially two diodes, it can function as such. However, since bipolar transistors are not designed to be used as diodes, using them as diodes might cause a problem in terms of current and other ratings.
What can I use instead of BC547 transistor?
BC547 Transistor Equivalent
BC547 transistor can be used as an alternative to many transistors: BC548, BC549, BC636, BC639, 2N2222 TO-92, 2N2222 TO-18, 2N2369, 2N3055 and 2N3904 all are BC547 transistor equivalent.
Does it matter what transistor you use?
This article is similar – it attempts to answer the above questions by showing that for many applications there is no need to choose a particular transistor – we should just use the first reasonably suitable one that comes to hand.
What is BC547 transistor?
BC547 is a Bipolar Junction Transistor, abbreviated as BJT. It is an NPN transistor. It has three terminals named as: Emitter. Collector.
Which transistor is best for switching?
- #1 NPN – 2N3904. You can find most often NPN Transistors in low-side switch circuits. …
- #2 PNP – 2N3906. For high-side switch circuits, you need a PNP style BJT. …
- #3 Power – TIP120. …
- #4 N-Channel (Logic Level) – FQP30N06L.
What is the most common transistor?
Metal–oxide–semiconductor FET (MOSFET)
The MOSFET is by far the most common transistor, and the basic building block of most modern electronics. The MOSFET accounts for 99.9% of all transistors in the world.
How To Find a Transistor Replacement
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Which transistors are used for switching?
Both PNP and NPN transistors can be utilized as switches. A basic terminal transistor can be handled differently from a signal amplifier by biasing both NPN and PNP bipolar transistors by an “ON / OFF” static switch. One of the main uses of the transistor to transform a DC signal “On” or “OFF” is solid-state switches.
Can we replace npn transistor with PNP?
Generally, the PNP transistor can replace NPN transistors in most electronic circuits, the only difference is the polarities of the voltages, and the directions of the current flow. PNP transistors can also be used as switching devices and an example of a PNP transistor switch is shown below.
What is the difference between a transistor and a MOSFET?
The Bipolar Junction Transistor (BJT) is a current-driven device (in contrast, MOSFET is voltage-driven) that is widely used as an amplifier, oscillator, or switch, amongst other things.
Are transistors and diodes the same?
The main difference between diode and transistor is that transistor is a three terminal device which passes current from high resistance region to low resistance region while the diode is a two-terminal device which current in only one direction from the anode to the cathode.
What is difference between transistor and diode?
Put simply, a diode is a two-terminal semiconductor device and a transistor is a three-terminal semiconductor device. A diode can allow the flow of current in one direction while blocking the flow of current in the other direction.
Why BC547 transistor is used?
BC547 Transistor Application
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.
How use BC547 transistor as a switch?
- Place Transistor on a breadboard.
- Connect Emitter to the ground of the battery.
- Add LED & 330 Ohm Resistor to Collector of BC547.
- Connect 1k Resistor and Switch to Base of transistor.
- Power up the circuit with 9V Battery.
What are the 3 legs of a transistor?
The transistor has three legs, the Collector (C), Base (B), and Emitter (E). Sometimes they are labeled on the flat side of the transistor. Transistors typically have one round side and one flat side.
How to Find Equivalent Transistors
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How do you know if a transistor is NPN or PNP?
Connect the positive lead of the multimeter to the Base (B) of the transistor and connect the negative lead to the Emitter (E) of the transistor. If it is an NPN transistor then meter should show a voltage drop between 0.45V and 0.9V. If it is a PNP transistor, then it should display see “OL” (Over Limit).
What makes a good transistor?
When choosing a transistor to use as a switch you need to consider its maximum collector current Ic(max) and its minimum current gain hFE(min). Transistor voltage ratings may be ignored for supply voltages less than 15V.
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