KSC3503ESTU device package

KSC3503ESTU schematic symbol

The invention of the Silicon transistors in the mid 50s is regarded as the greatest invention of the 20^th century. The semiconductor transistor single-handedly kicked off the third industrial revolution by making the existence of computers possible. Today the transistors are one of the most widely used electronic components which are used both as amplifiers and as switches. Transistors are available in discrete as well as fabricated IC packages.

Table of Contents

What is KSC3503ESTU？

The KSC3503ESTU is a NPN epitaxial Silicon bipolar junction transistor manufactured by On Semiconductor Corporation. Like most of the common transistors, the KSC3503ESTU is a three terminal device. The three terminals are Collector, Emitter, and Base respectively. This series of transistors is ideal for use in audio applications, CRT displays, video systems, and as current source.

Pin Configuration

The pin/terminal description of the KSC3503ESTU transistor is given in the table below:

Pin number	Description
1	Emitter terminal of the transistor
2	Collector terminal of the transistor
3	Base terminal of the transistor

Features

High voltage rating: V_CEO = 300V
Low reverse transfer capacitance
Excellent gain linearity at low THD
High frequency operation of 150 MHz
Availability of thermal and SPICE models

Applications

The common applications of KSC3503ESTU are presented as following:

Audio electronic circuits
Video output electronic circuits
CRT display circuits
Voltage amplifiers in electronic circuits
Current source in electronic circuits

Specifications

The major technical specifications of the KSC3503ESTU are provided as following:

V_CEO: 300V
Maximum frequency: 150MHz
Collector Base voltage: 300V
Collector DC current: 100mA
Collector pulse current: 200mA
Power dissipation at 25^oC: 7W
Junction temperature: 150^oC
Collector Emitter breakdown voltage: 300V
Maximum DC current gain: 320
Output capacitance: 2.6pF
Reverse transfer capacitance: 1.8pF

Alternatives

KSC3503ES , KSC3503DS , KSC3503DSTU;

How KSC3503ESTU work?

Bipolar junction transistors are very commonly used in electronic circuits of all types. The bipolar junction transistors can be used as amplifiers or as switches. The KSC3503ESTU transistor from ON semiconductor is designed to be used as a general purpose amplifier transistor. The bipolar transistors are either NPN or PNP type. The KSC3503ESTU is the NPN transistor.

One of the key applications of KSC3503ESTU is the implementation of a constant current source. A constant current source is a circuit which supplies or absorbs constant current regardless of the voltage across it. The current source circuit is very important in the design of audio amplifiers. The current sources are used in the circuits for providing biasing currents. There are multiple configurations and designs which are used to implement a constant current source. Some of the popular designs include Wilson circuit, Widlar circuit, 3-transistor circuit and cascade circuit.

In addition to the construction of constant current source, the KSC3503ESTU transistor can also be used as voltage amplifier and as general purpose amplifier in electronic circuits.

KSC3503ESTU BJT current mirror application circuit

Keywords and Tags

KSC3503ESTU
KSC3503ESTU transistor
Audio transistor
Audio NPN transistor
General purpose transistor
Silicon transistor
Silicon NPN transistor

KSC3503ESTU Related Products Prices

Parts	Mfr.	Description	Stock	Prices
KSC3503ESTU	ON Semiconductor	TRANS NPN 300V 0.1A TO-126	6871	$0.121 Lowest
KSC3503CS	ON Semiconductor	TRANS NPN 300V 0.1A TO-126	4000	RFQ
KSC3503DS	ON Semiconductor	TRANS NPN 300V 0.1A TO-126	202	RFQ