Ordering & Quality
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Mfr. Part # |
Company |
Description |
Package |
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Qty |
Pricing
(USD) |
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2N3904BU |
Company:ON Semiconductor |
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Package:TO-226-3, TO-92-3 (TO-226AA) |
DataSheet |
In Stock:75103
Buy
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Price:
1+: |
$0.20000 |
10+: |
$0.16200 |
25+: |
$0.13600 |
100+: |
$0.06640 |
500+: |
$0.05542 |
1000+: |
$0.03851 |
2000+: |
$0.03579 |
4800+: |
$0.03095 |
9000+: |
$0.02567 |
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Buy |
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In this blog, Apogeeweb has prepared 8 simple 2N3904 circuits for electronics enthusiasts. These circuit diagrams are basically beginner-friendly types. Hope these circuit diagrams are helpful to you.
Catalog
2N3904 Circuit
Circuit 1: Thermostat controller composed of LM75 intelligent temperature sensor and 2N3904 transisitor
- Circuit 6: 2N3904 Sample Circuit-Amplifier
- Circuit 7: How to design a 13.56mhz sine wave power amplifier circuit with 2N3904
- Circuit 8: The non-inverting circuit uses a pair of complementary NPN type (2N3904) and PNP type (2N3906) transistors
Component Datasheet
2N3904 Datasheet
FAQ
- What is a 2N3904 Transistor?
The 2N3904 is a common NPN bipolar junction transistor used for general-purpose low-power amplifying or switching applications. It is designed for low current and power, medium voltage, and can operate at moderately high speeds.
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- How Does a 2N3904 Transistor Work?
2N3904 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. 2N3904 has a gain value of 300; this value determines the amplification capacity of the transistor.
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PNP sensors produce a positive output to your industrial controls input, while NPN sensors produce a negative signal during an “on” state. ... NPN, or “sinking” output sensors, work in the opposite way, sinking ground voltage to an input when it's on.
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A transistor is a semiconductor device used to amplify or switch electronic signals and electrical power. It is composed of semiconductor material usually with at least three terminals for connection to an external circuit.
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- What is the Gain of a Transistor?
The current gain for the common-base configuration is defined as the change in collector current divided by the change in emitter current when the base-to-collector voltage is constant. Typical common-base current gain in a well-designed bipolar transistor is very close to unity.
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