Your Professional Transistor Supplier
Xian Baochen Information Technology Co., Ltd. is located in high-tech Zone, Xi 'an, Shaanxi Province, China, is a focus on sensors, transmitters, inverters, power semiconductor devices and supporting instruments R & D, manufacturing, sales and service enterprises. The company invests in research and development team, cooperates with excellent universities, integrates industry resources, and provides the best quality solutions for domestic and foreign users. Enterprise mission: to meet user needs and create value for customers.
Why choose us
Sales Market
We Products are exported to Europe, America, Southeast Asia, West Asia, Central Asia and other countries around the world. Our products are well received in these markets.
Our Service
Able to quickly respond to customer needs, to provide personalized customization, timely delivery, professional technical support and perfect after-sales service.
Strict Quality Control System
Able to efficiently produce large quantities of products, advanced production processes and stable supply chains, the implementation of strict quality control system. Constantly introduce new technologies and new materials to improve product performance and production efficiency.
Wide Range of Applications
Through the EU CE, RoHs testing, products are widely used in petrochemical, water conservancy and hydrology, machinery and equipment, automobile manufacturing, industrial process control, weighing measurement, people's livelihood applications and other fields.
Transistor
A transistor is a semiconductor device used to amplify or switch electrical signals and power. It is one of the basic building blocks of modern electronics.It is composed of semiconductor material, usually with at least three terminals for connection to an electronic circuit. A voltage or current applied to one pair of the transistor's terminals controls the current through another pair of terminals. Because the controlled (output) power can be higher than the controlling (input) power, a transistor can amplify a signal. Some transistors are packaged individually, but many more in miniature form are found embedded in integrated circuits.
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Specifications |
Details |
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Material Type |
FR-4, CEM-1, CEM-3, Aluminium Clad,Arlon*, Rogers*, Polyimide*, Kapton,Dupont |
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Material Thickness ( in inches) |
0.062", 0.080", 0.093", 0.125", 0.220", 0.047", 0.031", 0.020", 0.005" |
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Layer count |
1 to 28 Layers |
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Max. Board Size |
23.00" x 35.00"(580mm*900mm) |
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IPC Class |
Class II, Class III , Class 1 |
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Annular Ring |
5 mil/side or Greater (Min. Design) |
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Finish Plating |
Solder(HASL), Lead Free Solder(HASL), ENIG (ELectroless Nickel Immersion Gold), OSP, Immersion Silver,Immersion Tin, Immersion Nickel, Hard Gold, Other |
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Copper Weight |
0.5OZ-7OZ |
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Trace/Space Width |
3 Mils or Greater |
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Drill Clearance |
0.1mm(laser drilling) |
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Plated Slots |
0.036 or Greater |
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Smallest Hole (Finished) |
0.1mm or Greater |
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Gold Fingers |
1 to 4 Edge (30 to 50 Micron Gold) |
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SMD Pitch |
0.080" - 0.020" - 0.010" |
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Soldermask Type |
LPI Glossy, LPI-Matte, SR1000 |
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Soldermask Color |
Green, Red, Blue, Black, White, Yellow, |
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Legend Color |
White, Yellow, Black, Red, Blue |
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CNC Route Point |
Any |
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Minimum Route Width |
0.031" |
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Scoring |
Straight Lines, Jump Scoring, Panel Edge to Edge, CNC* |
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Body Gold |
HARD*, IMMERSION* (up to 50 MICRON GOLD) |
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Data File Format |
Gerber 274x with embedder aperture |
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Fab. Drawing Format |
DXF, HPGL, DWG, PDF, Gerber |
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E.T Testing |
Flying Probe, Single Sided, 1up Plate, Clampshell, Net List |
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Counter Sink / Counter Bore |
Availiable up to 0.250 Diameter |
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Control Impedence |
Yes |
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Blind Vias / Buried Vias |
Yes |
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Peelable Mask |
Yes |
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Carbon |
Yes |
Advantages of Transistors
Cost-effectiveness and Compact Size
Transistors are economical and occupy less space, making them ideal for electronic devices where size and cost efficiency are crucial.
Reduced Mechanical Sensitivity
Transistors exhibit lower sensitivity to mechanical stress, ensuring more stable performance and reliability in various applications.
Low Operating Voltage Requirements
Transistors operate efficiently at low voltage levels, contributing to energy conservation and compatibility with diverse electronic systems.
Exceptionally Long Lifespan
Transistors boast a prolonged operational life, enhancing the durability and longevity of electronic devices in which they are employed.
Minimal Power Consumption
Transistors consume minimal power, promoting energy efficiency and extending the battery life of portable electronic devices.
Swift Switching Capability
Transistors facilitate fast switching between on and off states, enabling rapid signal processing and enhancing the overall performance of electronic circuits.
Facilitation of Efficient Circuits
Transistors enable the development of circuits with improved efficiency, contributing to advancements in electronic technology and functionality.
Integral in Integrated Circuits
Transistors play a pivotal role in the creation of single integrated circuits, allowing for the consolidation of multiple functions on a single chip, leading to enhanced overall system performance.
Type of Transistor
BJT
In a BJT, the base-emitter junction is forward-biased by a small current. This configuration allows electrons to flow from the emitter to the base. The base-collector junction is reverse-biased, thereby acting as a barrier to the flow of electrons. However, the forward-biased base-emitter junction allows a small number of electrons to flow across the base-collector junction. This process creates a small current flow between the collector and emitter terminals that’s controlled by the base current.
FET
In an FET, the gate terminal is separated from the channel by an insulating material. Applying a voltage to the gate terminal creates an electric field that can attract or repel the free electrons in the channel. This process changes the conductivity of the channel and thus controls the flow of current between the source and drain terminals. FETs have high input impedance, which means they draw very little current from the input signal.
Applications of Transistor
Computers: Transistors are a fundamental building block of modern computers. We use them in digital logic circuits, memory chips and microprocessors.
Cell Phones: In cell phones, transistors amplify signals and control the power supply to different components.
Automotive: Modern cars and trucks use transistors for engine control, power inverters for electric drives, power windows and other electronic systems. In electric vehicles, transistors control the flow of electricity in the power electronic systems, allowing for efficient conversion and distribution of power.
Robotics: Synthetic transistors are capable of simultaneously processing multiple inputs, allowing them to excel at memory-related tasks. The goal is to support advanced robotic systems that demonstrate more human-like learning.
Space and Military: Transistors’ small size, low power consumption and high-performance characteristics make them ideal for use in satellites, missiles and other electronic systems used for defense and exploration.
Manufacturing: In factories, transistors can act as switches to power machinery at the appropriate times. They can also regulate LED lighting systems, contributing to workplace safety in manufacturing facilities.
Healthcare: Transistors are used in wearable health devices to power real-time monitoring of health data.
Energy: Transistors play a key role in solar charge controllers, which regulate the electrical current between the components of a solar panel system.
Components of a Transistor
Emitter
The emitter is the top layer of the transistor that serves as the source of electrons. It’s heavily doped and consists of a conductive material like copper or aluminum.
Base
The base is the middle layer of the transistor that acts as the control terminal. It’s lightly doped and regulates the flow of electrons from the emitter to the collector.
Collector
The collector is the bottom layer of the transistor and serves as the drain, collecting electrons sent from the emitter. It’s larger than the emitter and base but moderately doped. The collector is made of less conductive materials like silicon or aluminum.
Basic Structure: A transistor is made of a semiconductor material, typically silicon. It has three terminals – emitter, base, and collector.
Control Mechanism: The base acts like a control gate. Applying a small voltage or current to the base affects the flow of electricity between the emitter and collector.
Switching Operation: With no voltage on the base, the transistor acts like a closed switch, blocking current flow from emitter to collector. Applying a voltage to the base opens the switch, allowing current to flow freely from emitter to collector.
Amplification Operation: A small change in voltage at the base can significantly alter the current flow between emitter and collector. This is like using a small force to control a much larger object.
How is a Transistor Made
A transistor is comprised of three distinct semiconductor layers. Each of these is able to conduct a current. The various semiconductor materials are afforded certain properties through the chemical process of doping which either adds additional electrons, an N-type with a negative charge, or makes holes in the material's structure thus generating a P-type with a positive charge. A transistor features an N-type, negative, semiconductor layer in between two P-Type, positive, layers as a PNP configuration, or an NPN set up with a P-type sandwiched between two N-type layers.
Test a Transistor
Identify the Transistor Type and Pin Configuration:
Determine whether the transistor is NPN or PNP (this information is usually available on the transistor casing or datasheet).
Identify the Base (B), Collector (C), and Emitter (E) pins.
Set the Multimeter:
Turn the multimeter to the diode test mode (or resistance mode if diode mode is unavailable).
Test an NPN Transistor:
Place the positive (red) probe on the Base (B) and the negative (black) probe on the Emitter (E). A good transistor will show a voltage drop between 0.45V and 0.9V.
Place the positive (red) probe on the Base (B) and the negative (black) probe on the Collector (C). Again, a good transistor will show a voltage drop between 0.45V and 0.9V.
Reverse the probes (negative on Base and positive on Emitter or Collector). The multimeter should show OL (open loop) or no reading, indicating no conduction in the reverse direction.
Test a PNP Transistor:
Place the negative (black) probe on the Base (B) and the positive (red) probe on the Emitter (E). A good transistor will show a voltage drop between 0.45V and 0.9V.
Place the negative (black) probe on the Base (B) and the positive (red) probe on the Collector (C). A good transistor will show a voltage drop between 0.45V and 0.9V.
Reverse the probes (positive on Base and negative on Emitter or Collector). The multimeter should show OL (open loop) or no reading, indicating no conduction in the reverse direction.
Check for Shorts or Open Circuits:
Test the resistance between the Collector (C) and Emitter (E). A good transistor should show high resistance (OL) in both directions. If the multimeter shows low resistance, the transistor may be shorted.
●Interpreting the Results:
Good Transistor: Shows expected voltage drops in the forward direction and high resistance (OL) in the reverse direction.
●Faulty Transistor:
Shorted: Low resistance or continuity in both directions.
Open: No voltage drop or high resistance in the forward direction.
FAQ
As one of the leading transistor manufacturers and suppliers in China, we warmly welcome you to wholesale cheap transistor in stock here from our factory. All customized products are with high quality and competitive price.
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