A733 PNP Tip Power Transistor: 60V 100mA, TO-92 Plastic A733 Equivalent and Pinout
Changjiang Electronics Tech (CJ)
A733 datasheet pdf and Unclassified product details from Changjiang Electronics Tech (CJ) stock available at Utmel









A733 is a widely used TO-92 size BJT transistor designed to use for amplification and switching purposes. This article is going to explain pinout, equivalents, applications, and other details about the A733 transistor.

12V short circuit protection circuit homemade using c945 & A733 transistor
What is A733?
The A733 is a TO-92 size BJT transistor that can be used for both amplification and switching. It's found in a wide range of commercial products, educational devices, and toys, among other things. It's also utilized in instructional electronic circuits and projects made by students.
The transistor can drive a load with a voltage of -50V and a current of 150mA. The transistor's highest emitter-base voltage is 5V, and its minimum saturation voltage is merely 0.3V. It's perfect for use as an amplifier in a variety of applications due to its maximum collector dissipation of 250mW and DC gain of up to 600.
A733 Pinout

A733 Pinout
| Pin No | Pin Name |
| 1 | Emitter |
| 2 | Collector |
| 3 | Base |
Specifications
- TypeParameter
- Package / Case
refers to the protective housing that encases an electronic component, providing mechanical support, electrical connections, and thermal management.
SOT-23(SOT-23-3) - Current-Collector (Ic) (Max)150mA
- Packaging
Semiconductor package is a carrier / shell used to contain and cover one or more semiconductor components or integrated circuits. The material of the shell can be metal, plastic, glass or ceramic.
Tape & Reel (TR) - Power - Max
Power - Max is a parameter that specifies the maximum amount of power that an electronic component can handle without being damaged. It is typically measured in watts and indicates the upper limit of power that can be safely supplied to the component. Exceeding the maximum power rating can lead to overheating, malfunction, or permanent damage to the component. It is important to consider the power-max rating when designing circuits or systems to ensure proper operation and longevity of the electronic components.
200mW - Transistor Type
Transistor type refers to the classification of transistors based on their operation and construction. The two primary types are bipolar junction transistors (BJTs) and field-effect transistors (FETs). BJTs use current to control the flow of current, while FETs utilize voltage to control current flow. Each type has its own subtypes, such as NPN and PNP for BJTs, and MOSFETs and JFETs for FETs, impacting their applications and characteristics in electronic circuits.
PNP - Voltage - Collector Emitter Breakdown (Max)
Voltage - Collector Emitter Breakdown (Max) is a parameter that specifies the maximum voltage that can be applied between the collector and emitter terminals of a transistor or other semiconductor device before it breaks down and allows excessive current to flow. This parameter is crucial for ensuring the safe and reliable operation of the component within its specified limits. Exceeding the maximum breakdown voltage can lead to permanent damage or failure of the device. Designers and engineers must carefully consider this parameter when selecting components for their circuits to prevent potential issues and ensure proper functionality.
50V - RoHS Status
RoHS means “Restriction of Certain Hazardous Substances” in the “Hazardous Substances Directive” in electrical and electronic equipment.
RoHS Compliant
A733 Features
Type: PNP
Collector-Emitter Voltage: -50 V
Collector-Base Voltage: -60 V
Emitter-Base Voltage: -5 V
Collector Current: -0.15 A
Collector Dissipation: 0.25 W
DC Current Gain (hfe): 90 to 600
Transition Frequency: 180 MHz
Operating and Storage Junction Temperature Range: -55 to +150 °C
Package: TO-92
A733 Applications
RF Circuits
Audio Preamplifiers
Audio Amplifier
Sensor Circuits
Audio Amplifier Stages
Signal Amplification
Switching Loads under 150mA
Where to use A733?
This A733 transistor can be used for a variety of amplification and switching applications. When used as a switch, it can drive loads of up to 150mA. which is sufficient to power relays, LEDs, high-power transistors, and integrated circuits, among other things. It can be utilized in low voltage circuits because it only requires a 0.3V base voltage for saturation. It can, however, be utilized in audio amplification stages as well as an amplifier to amplify a variety of signals.
How to run A733 safely?
It is recommended that you keep these items in mind when using this gadget in your circuits if you want it to last a long time. Do not drive a load that is higher than 50 volts and 150 milliamps. It is usually preferable to drive at a lower load than the maximum capacity. Always use a proper base resistor, and do not use or store this transistor between -55 and +150 degrees Celsius.
A733 Dimensions

A733 Dimensions
A733 Manufacturer
Changjiang Electronics has become the No. 1 and No. 3 integrated circuit packaging and testing enterprise in China. Changjiang Technologies provides packaging design, product development, and certification, as well as a full range of professional manufacturing services ranging from chip testing, packaging to finished product testing and shipping.
What is the use of A733?
A733 PNP General Purpose Transistor is designed for the driver stage of the AF amplifier.2SA733 is Complimentary to C945.
What is the voltage of A733?
50V
What can I use to replace A733?
2SC945, BC177 (4a), BC204 (4), BC513 (21a), 2N2906-07(4a), 3CG120C
Can A733 and A1013 be interchangeable?
No, they are not interchangeable.
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