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What is the replacement of 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.
What is the purpose of a transistor?
Transistor, semiconductor device for amplifying, controlling, and generating electrical signals. Transistors are the active components of integrated circuits, or “microchips,” which often contain billions of these minuscule devices etched into their shiny surfaces.
How can transistors act as amplifiers or switches?
By turning a small input current into a large output current, the transistor acts like an amplifier. When there is no current to the base, little or no current flows between the collector and the emitter. Turn on the base current and a big current flows. So the base current switches the whole transistor on and off.
What is a transistor composed of?
Most transistors are made from very pure silicon, and some from germanium, but certain other semiconductor materials are sometimes used. A transistor may have only one kind of charge carrier, in a field-effect transistor, or may have two kinds of charge carriers in bipolar junction transistor devices.
When should you use a transistor?
One of the most common uses for transistors in an electronic circuit is as simple switches. In short, a transistor conducts current across the collector-emitter path only when a voltage is applied to the base. When no base voltage is present, the switch is off. When base voltage is present, the switch is on.
What is the current gain of a 2sd669 transistor?
Here is an image showing the pin diagram of the this transistor. The 2SD669 transistor might have a current gain anywhere between 60 and 320. The gain of the 2SD669-B will be in the range from 60 to 120, 2SD669-C ranges from 100 to 200, 2SD669-D ranges from 160 to 320.
Which is the highest rated 2sd669 power amplifier?
Base1232SD669, 2SD669AAbsolute Maximum Ratings (Ta = 25C)RatingsItem Symbol 2SD669 2SD669A UnitCollector to base voltage VCBO 180 180 VCollector to emitter voltage VCE 2SD669, 2SD669ASilicon NPN EpitaxialApplicationLow frequency power amplifier complementary pair with 2SB649/AOutlineTO-126 MOD1. Emitter2. Collector3.
What is the Max junction temperature of 2sd669?
Max. Operating Junction Temperature (Tj): 175 °C 2SD669, 2SD669ASilicon NPN EpitaxialADE-208-899 (Z)1st. EditionSep. 2000ApplicationLow frequency power amplifier complementary pair with 2SB649/AOutlineTO-126 MOD1. Emitter2. Collector3.