Introduction of BC107 Transistor
BC107, an NPN transistor, is used in electronic circuits such as an amplifier, rectifiers, and switches. The emitter and collector are left free when the base pin is at the ground and then closed when a signal is sent to the base pin. BC107 features a gain of 50. This number determines the capacity to amplify the transistor. The maximum current that can be flowing via the collector pin can be 100mA. We are unable to connect devices that draw more than 100mA through this transistor.

Today, easybom will provide the information regarding the introduction to BC107. The content is divided into the following parts: BC107 transistor pinout, BC107 transistor specifications, BC107 transistor datasheet, BC107 transistor equivalent, and so on. We'll go over every aspect of this transistor so that you'll have a better understanding of what it is and what are its primary uses. Let's get into it and discover its characteristics.
Features of BC107 Transistor
Small Signal NPN Transistor
Current Gain (hFE): 450 (maximum)
Continuous Collector current (IC) is 100mA
Collector-Emitter voltage (VCEO) is 45V
Collector-Base voltage (VCB0) is 50V
Emitter Base Voltage (VBE0) is 6V
BC107 Transistor Pinout
Below is the BC107 Transistor Pinout:

Specifications
Physical
Package / Case - TO-206, TO-18-3
Number of Pins - 3
Technical
Operating Temperature - 175°C TJ
BC107 Transistor Circuit
Below is the BC107 transistor circuit:

Where to Use it: BC107 Transistor Uses
The BC107 NPN transistor is general use and is suitable for driver modules like relay driver, LED driver, etc, and amplifier modules like Audio amplifiers, signal amplifier, as well as Darlington pair.
BC107 Transistor Equivalent:
You also could use BC549, or BC547 as BC107 Transistor Equivalent. You could find them on easybom.
What you need to know about BC107?
Q1:
What is transistor and symbol?
The transistor is an electronic device with three terminals namely collector, emitter, and base. It's used in electronic circuits such as an amplifier, rectifiers, and switches. The symbols are illustrated in the shape of a circle.

Q2:
How do you test a BC107 transistor?
BC107 is an NPN transistor. The emitter and collector are left free (Reverse biased) when the base pin is at a level and then close (Forward biased) when an input signal is sent to the base pin. It features a gain of 50 hfe (BC107 transistor hfe). The value defines the amplifying capacity that the transistor can provide.
Q3:
How do you test a transistor in a circuit?
In order to test a transistor, you'll be required to change the dial of your multimeter towards the diode settings. Then connect the meter's positive leads to the terminals of its base. Connect the negative terminal of the meter with the transistor's collector terminal.

Q4:
What is the use of the 2N2222 transistor?
The 2N2222 is designed for general-purpose low-power amplifying and switching functions. It is specifically designed for low-to-medium current, low power, and medium voltage. It could operate at moderately high speeds.
Q5:
How do you know if a transistor is open?
The base of the transistor should be connected to the one marked as positive in the multimeter. Join the terminal labeled as negative or the common terminal to the collector, and take a reading of the resistance. By this time, the resistance should read open circuit.
Package Dimensions
Below is the picture of the 2D Model and Dimensions from the BC107 transistor Datasheet will be useful to know the package type and dimensions.

About the Manufacturer
STMicroelectronics
STMicroelectronics is a globally recognized semiconductor company. They are dedicated to developing semiconductor solutions for various microelectronics applications. STMicroelectronics enjoys unrivaled silicon and system expertise, strong manufacturing strength, IP portfolio, and solid relationships with their strategic partners. Based on these advantages, STMicroelectronics has become a pioneer in System-on-Chip (SoC) technology and its products have a positive effect in realizing today's convergence trends.
Datasheet
Download the BC107 transistor datasheet below:
https://pdf.easybom.com/r/datasheets/stmicroelectronics-bc107-datasheets-0168.pdf
Conclusion
In short, BC107 is a tiny single NPN transistor, available in the packaging of TO-18 metal. It is widely used in driver modules like relay drivers, LED drivers, etc, and amplifier modules like Audio amplifiers, signal amplifiers, as well as Darlington pairs. Today, many new transistors are being developed to replace BC107. You could find it on the market to replace its older ones.