BC547 Transistor (TO-92) Pinout, Features, Equivalents, Datasheet

The BC547 is a silicon NPN bipolar junction transistor with an epitaxial base. It belongs to the BD54X series and housed in a TO-92 package suitable for low-power tasks like switching applications and power amplifications.

It can handle up to 50V for collector-base and 45V for collector-emitter voltages, with a maximum collector current of 100mA. The emitter-base voltage is 6V, and this transistor can dissipate up to 500W of power. With a minimum Beta (β) of 110, the BC547 transistor ensures reliable performance across various applications at different currents and voltages.

BC547 Pinout Configuration

The pin configuration of the BC547 transistor is as follows:

Pin No.	Name	Description
1	Base	Controls the biasing of the transistor.
2	Collector	Electrons Emitted from Emitter Collected by the Collector.
3	Emitter	Electrons emitted from the emitter into the first PN.

Absolute Maximum Ratings of BC547

The quick technical specifications and features of the bc547 transistor are given below:

• Transistor Type: Si
• Polarity: NPN
• Emitter-Base Voltage (Veb max.): 6V
• Collector Power Dissipation (Pc max.): 500mW
• Collector-Base Voltage (Vcb max.): 50V
• Collector-Emitter Voltage (Vce max.): 45V
• Collector Current (Ic max.): 500mA
• Operating Junction Temperature (Tj): -65°C to 150°C
• Transition Frequency (ft): 300MHz
• Collector Capacitance (Cc): 6pF
• Forward Current Transfer Ratio (hFE min.): 110
• Noise Figure (dB): -
• Package: TO-92

Note: Complete Technical Details can be found in the BC547 transistor datasheet given at the end of this page.

BC547 PNP Complementary

There are no complementary PNP transistors to the BC547.

BC547 Equivalent Transistor

Transistor	Type	Polarity	Pc	Vcb	Vce	Veb	Ic	Tj	Ft	Cc	Hfe	Caps
BC546	Si	NPN	0.5	80	80	6	.1	150	300	6	110	TO92

These single transistor has similar features and can be used as replacement for the BC547 in terms of their package, emitter-base voltage, transition frequency, and forward current transfer ratio. But there might be slight differences in pin layout. Please verify before using them in a PCB or project.

Applications of BC547

1. Switching load of up to 100mA
2. TV and Home appliance equipment
3. small load switch transistors with high gain and low saturation voltage
4. LED drivers
5. Relay drivers

BC547: 2D Model and Dimensions

If you are designing a PCB or perf board with this component, the following picture from the BC547 datasheet will be useful to determine its package type and dimensions.

Component Datasheet

BC547 Datasheet

BC547 Safe Operating Guidelines

It is recommended not to push the BC547 transistor to its absolute limits. It's best to stay at least 20% below its maximum ratings. For example, while it can handle a maximum load of 100mA, it's safer to avoid exceeding 80mA. Similarly, its maximum load voltage is 45V, so it's advisable to stay below 36V. Additionally, ensure the transistor's temperature stays between -65°C and 150°C for proper operation.