2N3390

Due to market price fluctuations, if you need to purchase or consult the price. You can contact us or emial to us:   sales@allicdata.com

The 2N3390 is a PNP Bipolar Junction Transistor (BJT) used to amplify signals by creating current and voltage gains. The device is used in general-purpose switching applications, such as controlling motor movement, drive current levels, and amplifying low-level signals. This guide will cover the 2N3390’s application fields and working principles.

MECHANICAL CHARACTERISTICS OF THE 2N3390

The device is composed of a silicon-based PNP semiconductor chip of a TO-18 casing. The transistor is an epitaxial, planar design with three metallized terminals. The third terminal or base has insulated gate which is used to control the current and voltage flow within the device. The 2N3390 is a surface-mount device, meaning that it is mounted to a PCB, or Printed Circuit Board, with pins that penetrate the primary layer of the board. It is not attached directly onto the board’s surface. The device measures 4.75 mm in length, 1.95 mm in width, and 1.27 mm in height.

2N3390 APPLICATION FIELDS

The 2N3390 is a versatile device used in a wide range of general-purpose applications. Due to its low transistor-switching noise, it is suitable for use in audio amplifiers as a driver. The device is also well-suited for use in multiple stages of current amplification circuits for small signal switching. It is commonly used in circuits for interfacing line drivers, telephone, and other communication equipment. The 2N3390 can also be used to provide phase compensation in Precise Timing Circuits and can be employed to drive small motors.

2N3390 WORKING PRINCIPLES

The 2N3390 functions as a current amplifier, or switches currents and voltages in a circuitry. To understand the device’s functioning, we must first understand the three terminals of the transistor. The Emitter is exactly opposite to the Base and it emits charge carriers (electrons or holes). The Collector is situated between the Base and the Emitter and it collects charge carriers emitted of the emitter. On the other hand, the Base is an insulated junction between the emitter and the collector. The Base terminal consists of P-type and N-type semiconductors joined together. When voltage is applied to the Base control terminal, current is allowed through the junction.

Now, with the transistor turned on, current begins to flow through the Base and out of the Emitter. When the voltage applied to the Base is equal to the forward bias voltage of the transistor, the current starts flowing from Base to Emitter and from the Collector to Emitter. Because the Base terminal has been supplied with a voltage, a large number of current carriers are generated at the base. For example, when the base is positive, the flow of electrons from the base to the emitter gets activated. As a result, the circuit which is connected from the base to the emitter gets saturated and becomes activated. This is called Collector current. At the same time, the Collector current is drawn from the Collector to the Emitter and it is greater than the Emitter current.

The gain of the 2N3390 is specified as a hFE value between 120 and 500, depending on the collector current value. The gain of the transistor is defined as the ratio of the collector current to the base current. To increase the current gain, increase the resistor that is connected between the Base terminal and the Emitter terminal. In conclusion, the 2N3390 is a versatile PNP Bipolar Junction Transistor used in a range of general-purpose applications. It operates by creating current and voltage gains, making it suitable for use in amplifiers, communication equipment, and small motors. Its gain is specified as a hFE value depending on the collector current value.

The device measures 4.75 mm in length, 1.95 mm in width, and 1.27 mm in height. It is composed of a silicon-based semiconductor chip of a TO-18 casing and is a surface-mount device with pins that penetrate the primary layer of the board.

The specific data is subject to PDF, and the above content is for reference