Introduction
The 2SB772 is a popular and versatile PNP power transistor housed in a TO-126 package, making it suitable for a wide variety of switching and audio amplification purposes. Its robust characteristics, including a high collector current of up to -3A, allow it to drive a diverse range of medium-power loads in electronic circuits. This makes the 2SB772 a go-to choice for applications where a low-power signal needs to control a more powerful component, such as motors, relays, and high-power LEDs.
Note: DATASHEET DOWNLOAD button is provided end of this article.
As a switching component, the 2SB772 is highly efficient due to its low collector-emitter saturation voltage of just -0.3V. This feature is crucial for minimizing power loss when the transistor is in the “on” state, making it ideal for applications requiring efficient low-voltage switching. Its ability to handle pulse currents of up to -5A further enhances its utility in high-demand switching scenarios.
2SB772 PNP Transistor
The 2SB772 also excels in audio amplification tasks. With a high DC current gain (hFE) ranging from 60 to 400 and a significant collector power dissipation of 10 watts, it can effectively amplify audio signals without significant distortion. It is often used in audio amplifier stages, where it can act as a pre-amplifier or driver. The 2SB772 is frequently paired with its complementary NPN transistor, the 2SD882, to create efficient Class B push-pull amplifiers, a fundamental configuration for driving speakers and other audio loads.
2SB772 Pinout
2SB772 PNP Transistor Key Features
The 2SB772 is a PNP power transistor that’s a go-to choice for medium-power applications. It’s the complementary counterpart to the popular NPN transistor 2SD882 and is known for its ability to handle significant current and power.
- PNP Polarity: As a PNP transistor, its operation is controlled by a negative base voltage. A current flows from the emitter to the collector, making it suitable for circuits where a negative-biased switch or amplifier is needed.
- High Collector Current (IC): The 2SB772 can handle a continuous collector current of up to -3A. This high current rating allows it to drive more powerful loads than typical small-signal transistors, such as small motors, high-power LEDs, and relays.
- High Voltage Ratings: It has a collector-emitter voltage (VCE) of -30V and a collector-base voltage (VCB) of -40V. These ratings ensure it can operate reliably in various low to medium-voltage circuits.
- Medium Power Dissipation: The transistor can dissipate up to 10 watts of power. This capability is crucial for applications like audio amplifiers, as it allows the transistor to manage and dissipate heat effectively, preventing thermal damage.
- High DC Current Gain (hFE): The 2SB772 has a DC current gain ranging from 40 to 320. This high gain allows for effective current amplification, making it an excellent choice for audio amplification and driver circuits.
- Complementary Pair: It’s often used as a complementary transistor with the 2SD882 NPN transistor. This pairing is common in Class B push-pull amplifier circuits, where they work together to efficiently amplify both the positive and negative halves of a signal.
- Compact Package: The 2SB772 is typically available in a TO-126 plastic package, which is designed for through-hole mounting and provides a surface for heat dissipation.
2SB772 Transistor Specifications/Characteristics
| Characterstics | Rating (Max) |
|---|---|
| Collector Current(IC) | –3A |
| Collector-Emitter Voltage (VCE) | –30V |
| Collector-Base Voltage (VCB) | –40V |
| Emitter-Base Voltage (VEBO) | –5V |
| Collector Dissipation (Pc) | 10 Watts |
| Transition Frequency (fT) | 90 MHz |
| DC Current Gain (hFE) | 60 – 400 |
| Storage & Operating temperature | -55 to +150 Centigrade |
| Package Type | TO-126 |
| Transistor Type | PNP |
More Circuit Layouts
Key Applications of 2SB772 PNP Transistor
The 2SB772 is a PNP power transistor widely used for both amplification and switching. Its high current and power handling capabilities make it suitable for a variety of medium-power electronic circuits.
- DC to DC Converters: The 2SB772 is often used in DC to DC converter circuits, where its ability to handle and switch relatively high currents efficiently helps in stepping up or stepping down voltage levels.
- Relay Driver: With a high collector current of up to -3A, the 2SB772 is an excellent choice for driving relays and other electromagnetic components that require significant current to operate. Its use as a switch allows a low-power control signal to activate a higher-power device.
- Audio Amplifier & Amplifier Stages: The 2SB772 is commonly used in audio amplifier designs, particularly in the output or driver stages. It is often paired with its complementary NPN transistor, the 2SD882, to create push-pull amplifier configurations that provide a high-fidelity audio output.
- Switching Loads under 3A: As an electronic switch, the 2SB772 can effectively control loads that require a continuous current of up to -3A. This includes components such as motors, solenoids, and high-power LEDs.
- Motor Driver: The 2SB772 is a good choice for motor driver circuits, where its high current handling capability allows it to control the speed and direction of DC motors in various projects, including robotics.
NPN Complimentary Transistor
NPN Complementary of 2SB772 Transistor is 2SD882.
Equivalent Transistors of 2SB772
MJE172, KSB772, 2N6407, 2SA715, 2SA738, 2N6414, 2N6415, 2SA963 2SB743, 2SB744, 2SB772, BD788, BD816, BD826, BD386, BD386-1, BD386-2, BD386-5, BD386-8, BD388, BD828, BD834, BD836, KSB744, KSB744A, KSB772, MJE170, MJE171, MJE230, MJE231, MJE232, MJE233, MJE234.
(The pinout for certain transistors can vary from that of the 2SB772).
Datasheet of 2SB772 PNP Transistor
Click the following Button below to download the datasheet of 2SB772 Transistor :
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