bc337 transistor

BC337 specs

• NPN transistor
• Collector to base Voltage (V_CB) is 50V
• Collector to emitter voltage (V_CE) is 45V
• Emitter to base voltage (V_EB) is 5V
• DC Current Gain range is 100 to 630h_FE
• Collector current (I_C) is 800mA
• Transition frequency (F_T) is 210MHz
• Junction temperature (T_J) is +150°C

BC337 pinout

Pin Number	Pin Name	Description
1	Collector	The current flows through the collector
2	Base	The base is the trigger for the device
3	Emitter	Current flows through the emitter

 

TO-92 package

• The TO-92 package is used on the BC337 transistor, the BC337 is a general-purpose transistor, so TO-92 is called the less expensive package.
• A mixture of epoxy and plastic is used to make the BC337 package, due to these materials the BC337 transistor is compact.

If you need the datasheet in pdf please click this link

 BC337 Description

The BC337 is a general-purpose transistor used at low power circuit applications and the usage of BC337 transistor in the common appliance is enormous.

The maximum current gain of the BC337 transistor is 100 to 630hFE, and the gain value is more important at the amplifier circuits. 

The maximum collector current or load current of the BC337 transistor is 800mA, which means the peak load is currently allowable to this transistor.

The power dissipation on this transistor is 625mW, this value indicates the maximum power dissipation on this transistor device.

The transition frequency of the BC337 transistor is 210MHZ, it is an important factor when the transistor works in high switching applications.

The peak junction temperature allowable at the BC337 transistor is 150°C.

BC337 datasheet 

If you need the datasheet in pdf please click this link

BC337 transistor Equivalent 

• Equivalent transistor for the BC337 transistor is 2n2222, 2n3904, 2n4404, 2n7031 and BC358.
• The transistors other than 2n4404 are NPN equivalent for the BC337 transistor, the 2n4404 is a PNP equivalent for BC337.
• The electrical and physical specifications of all of the transistors in this list are almost similar. 

BC337 vs 2n2222 vs BC547 vs BC237

• In the below table, we try to compare the electrical characteristics of BC337 vs 2n2222, BC547 vs BC337, and BC237 vs BC337.
• This electrical comparison between transistors will help us to spot a particular transistor, for replacing or other purposes.

Characteristics	BC337	BC547	2N2222	BC237
Collector to base voltage (VCB)	50V	50V	60V	50V
Collector to emitter voltage (VCE)	45V	45V	30V	45V
Emitter to base voltage (VEB)	5V	6V	5V	6V
Collector current (IC)	800mA	100mA	800mA	100mA
Power dissipation	625mW	500mW	500mW	350mW
Junction temperature (TJ)	150°C	150°C	200°C	150°C
Transition frequency (FT)	210MHZ	300MHZ	250MHZ	100MHz
Noise (N)	-	10dB	-	10dB
Gain (hFE)	100 to 630hFE	110to 800hFE	30to 300hFE	150 to 460hFE
Package	TO-92	TO-92	TO-18	TO-92

BC337 transistor uses  

• Low power audio amplifier
• Small signal amplifier
• Switching circuits
• Audio frequency driver
• Motor control circuits

BC337 amplifier circuit

• This is a circuit of an amplifier using a BC337 transistor with a complementary PNP transistor BC327.
• The amplifier consists of three transistors BC337, BC327, and BC547.
• It is a Class AB amplifier, when the audio reaches the circuit, the BC547 transistor acts as a preamp and amplifies the signal, and passes towards the main section.
• The amplifier’s main section consists of a push-pull section that is BC337 and BC327, both of the transistors done amplifications and pass over the signal towards the 8ohm speaker.

BC337 switch circuit

• The figure shows the BC337 transistor switch circuit, the load used in the circuit is LEDs.
• When the switch closes, the base resistor passes a trigger pulse to the transistor base and the transistor becomes ON.
• Then transistor passes the voltage to the LEDs.
• This results in turning ON LEDs.
• The BC337 transistors had many applications at low-power switching circuits.

BC337 relay driver  

• The relay driver using the BC337 transistor is a simple process.
• The BC337 transistor is used to control the flow of current in the relay circuit and make a path for the high current to flow.
• The combined operation of flywheel diode and transistor make a good relay driver circuit.

BC337 price

• The BC337 transistor is a low-power general purpose transistor, BC337 had applications on general appliances and circuits.
• The price for a BC337 transistor will be 15rupees for 5pieces or 0.20USD dollars.