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Fairchild KSP94BU Details

Post Date：2024-11-20，

The fairchild ksp94bu is a high-performance PNP transistor produced by Fairchild Semiconductor (now part of On Semiconductor). Designed for applications requiring high voltage and medium current, this transistor is widely used in power management, switching circuits, signal amplification, and various electronic devices. The KSP94BU is known for its high withstand voltage, low saturation voltage, and high gain characteristics, making it particularly suitable for applications that require high reliability and stability.

Fairchild KSP94BU Main Specifications and Features

Electrical Parameters

Maximum Collector-Base Voltage (Vceo): 400V

Maximum Collector-Emitter Voltage (Vcbo): 400V

Maximum Emitter-Base Voltage (Vebo): 5V

Maximum DC Collector Current (Ic): 300mA

Maximum Pulsed Collector Current (Icm): 600mA

Maximum Power Dissipation (Ptot): 625mW (at Ta = 25°C)

DC Current Gain (hFE): 40 (minimum)

Maximum Collector-Emitter Saturation Voltage (Vce(sat)): 0.75V (at Ic = 100mA)

Physical Characteristics of Fairchild KSP94BU

Package Type: TO-92

Number of Pins: 3

Dimensions: Approx. 4.7mm x 2.9mm x 2.2mm

Weight: Lightweight, suitable for compact designs

Fairchild KSP94BU Operating Temperature Range

Storage Temperature: -65°C to +150°C

Operating Temperature: -65°C to +150°C

Fairchild KSP94BU Reliability

High Reliability: Fairchild Semiconductor uses strict quality control standards during the manufacturing process to ensure that each transistor has high reliability and long life.

Anti-interference design: The built-in anti-interference design enhances the stability of the transistor in the electromagnetic environment and is suitable for various complex working environments.

Fairchild KSP94BU Functional Features

High Withstand Voltage: The maximum collector-base voltage of 400V makes it suitable for high voltage applications such as power switching and high voltage signal amplification.

Low Saturation Voltage: The maximum collector-emitter saturation voltage of 0.75V ensures low power consumption and high efficiency.

High Gain: The minimum DC current gain of 40 provides good signal amplification capability.

Fast Switching: Suitable for circuits that require fast switching, such as pulse width modulation (PWM) and switching power supplies.

Fairchild KSP94BU Dimensional Drawing

Fairchild KSP94BU Application Areas

Power Management

Switching Power Supply: Switching elements used in switching power supplies to ensure efficient and stable power conversion.

Regulator: Used in linear regulators and switching regulators to provide stable output voltage.

Signal Amplification

Audio Amplifier: Used in audio amplifiers to amplify signals and provide high-fidelity sound quality.

Sensor Amplification: Used to amplify various sensor signals to ensure signal accuracy and reliability.

Switching Circuit

Relay Drive: Used to drive relays and other switching elements to achieve circuit switching and control

Load Control: Used to control various loads such as motors, bulbs, and heating elements to ensure the normal operation of the load.

Automotive Electronics

In-Vehicle Electronics: Used for signal amplification and switch control in automotive electronic systems to ensure system reliability and safety.

Ignition System: Used for switch control of automotive ignition systems to ensure normal start-up and operation of the engine.

Industrial Control

PLC Control: Used for signal amplification and switch control in programmable logic controllers (PLCs) to achieve industrial automation.

Motor Drive: Used for switching elements in motor drive circuits to achieve precise control of motors.

Fairchild KSP94BU Installation and Use

Installation:

Soldering: Use proper soldering techniques and tools to ensure that the pins are soldered firmly and without cold solder joints.

Heat dissipation: In high power applications, consider using a heat sink or thermal paste to ensure that the temperature of the transistor is within a safe range.

Precautions for use:

Overvoltage protection: Ensure that overvoltage protection measures are included in the circuit design to prevent exceeding the maximum voltage.

Overcurrent protection: In high current applications, use current limiting resistors or other protection measures to prevent exceeding the maximum current.

Temperature monitoring: In high temperature environments, monitor the temperature of the transistor to ensure that it operates within a safe range.

Fairchild KSP94BU Datasheet

Click to view the table:

Fairchild KSP94BU Datasheet PDF

Conclusion

The Fairchild KSP94BU is a high-performance, high-reliability PNP transistor that is particularly suitable for applications requiring high voltage and medium current. Its high withstand voltage, low saturation voltage, and high gain characteristics make it excel in power management, signal amplification, switching circuits, automotive electronics, and industrial control. Whether in home electronic devices, industrial automation systems, or automotive electronics, the KSP94BU can provide excellent performance and stable operation to meet the needs of a variety of complex applications.

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