Skip to main content

2SC828 - NPN Amplifier Transistor

2SC828 is an NPN, Silicon-based AF Amplifier Transistor that is mainly used in AF based audio equipment for amplification and switching. It has a Collector-Emitter Voltage of 45 Vdc with a Collector-Base voltage of 45 Vdc. The 2SC828 transistor could provide 50mAdc of collector current continuously.


Pin Description of 2SC828 Transistor

Pin Number

Pin Name




Emitter pin of the transistor



Base pin of the transistor



Collector pin of the transistor

Features and Specification of 2SC828 Transistor

  • Type: NPN
  • Segment: AF based Amplification and switching
  • Collector to Emitter Voltage (VCEO)= 25V
  • Collector to Base Voltage (VCBO)= 30V
  • Emitter to Base Voltage (VEBO)= 7V
  • Collector Current (IC)= 50mA
  • Min hFE = 130 for Q variant, 180 for R variant, and 260 for S variant (IC = 2.0 mAdc, VCE = 5 Vdc)
  •  Max hFE = 260 for Q variants, 360 for R variant, and 520 for S variant (IC = 2.0 mAdc, VCE = 5Vdc)
  • Current-gain-bandwidth Product = 220Mhz (Typ) (IC = 2mAdc, VCE = 10Vdc)


Note: Complete technical details can be found in the 2SC828 Datasheet linked at the bottom of this page.


Alternative Product of 2SC828 Transistor

Replacements for 2SC828 transistors are 2N3904, BC550, BC548, MPSH10, etc.


2SC828 Transistor- Overview

The 2SC828 is an NPN silicon-based planar transistor used in AF amplification. It offers great stability in the medium frequency switching operation. The 2SC828 is available in three variants depending on the different levels of hFE. The variants are Q, R and S. The hFE levels are 130-260, 180-360, and 260-520 (min-max) respectively.


How to Choose a Transistor

1. Choose the transistor type that is required for the application. 2SC828 is an NPN transistor thus it is suitable to use on the low side of the power path. If the application requires high side switching, then use PNP.


2. Calculate the maximum Collector-Emitter voltage, and the Collector-Base voltage will be for the targeted application. Choose a transistor that has the Collector-Emitter and Base-Emitter breakdown voltage more than what is actually required. 2SC828 supports 25V Collector-Emitter breakdown voltage and 30V Collector-Base Breakdown voltage.


3. Calculate maximum Collector Current. Choose a transistor that could tolerate more than the Collector current that is actually required for the application. 2SC828 works up to 50mA of continuous collector current (IC).


4. Choose the proper hFE (DC gain) and always check for the bandwidth for Audio related applications.


2SC828- Interfacing Diagram

The below image is showing the standard application of the NPN transistor 2SC828 as an amplifier. 

2SC828 Interfacing Diagram

The C1 is the coupling capacitor and the C2 is the DC blocking capacitor where the output will be harvested. The RC is the collector Resistor and changing this value will change the frequency response of the circuit as well as it will control the DC gain by controlling the collector current. R1 and R2 are used as a voltage divider for biasing the transistor.

A typical value for 12V operation could be, R1 = 100k, R2 = 10k, RC = 10k, and C1, C2 can be 1uF ceramic capacitors.


Applications of 2SC828 Transistor

  • AF Amplifier system
  • AM Transmitter
  • AF Tuner
  • Oscillator Driver
  • Medium Speed Switching applications


2D Model of 2SC828

The dimensions of 2SC828 are given below to help you with selecting the right PCB footprint for 2SC828.

2SC828 Transistor Dimensions

Component Datasheet

Related Post

Join 20K+subscribers

We will never spam you.

* indicates required

Be a part of our ever growing community.