MJE2955T is a PNP power transistor, which is a general-purpose electronic component.This type of transistor is commonly used in power amplifiers, switching power supplies, linear regulators and other circuits.

Ⅰ.Specifications of MJE2955T

•Transistor polarity:PNP
•Configuration:Single
•Collector-emitter saturation voltage:1.1V
•Collector-base voltage VCBO:70V
•Emitter-base voltage VEBO:5V
•Collector-emitter maximum voltage VCEO:60V
•Gain bandwidth product fT:2MHz
•Maximum DC collector current:10 A
•Pd-Power dissipation:75W
•Collector continuous current:10A
•DC current gain hFE maximum:70
•DC collector/Base Gain hfe Min:20
•Minimum operating temperature:-55℃
•Maximum operating temperature:+150℃
•Height:9.15mm
•Length:10.4mm
•Mounting type:Through hole
•Current-Collector cutoff (maximum):700µA
•Vce saturation voltage drop (maximum value) when Ib and Ic are different:8V @ 3.3A, 10A
•DC current gain (hFE) (minimum value) at different Ic and Vce:20@ 4A, 4V
•Frequency-jump:2MHz

Ⅱ.Main uses of MJE2955T

1.Switching power supply: A switching power supply is an electronic device that uses switching tubes to control the flow of current to achieve high-efficiency energy conversion. MJE2955T is a transistor with large current and voltage tolerance, so it is often used in switching power supply designs. In switching power supplies, MJE2955T can be used as a switching tube to control the flow of current to achieve high-efficiency energy conversion.

2.Power drive: In the power drive circuit, MJE2955T can control the power supply voltage or current to meet the needs of different applications. By using MJE2955T, effective control of power supply can be achieved to ensure the stable operation of electronic equipment.

3.Power amplifier: MJE2955T can be used to design medium power amplifier circuits, especially in applications requiring high current and medium power output. This type of transistor is typically used to amplify a signal so that it has enough power to drive a load, such as a speaker or other device with high power requirements.

4.Linear regulator: In some applications that require stable voltage output, MJE2955T can be used in linear regulator circuits. The linear regulator adjusts the output voltage to stabilize the fluctuation of the input voltage, and is suitable for some occasions that require high power supply stability.

Ⅲ.Absolute Maximum Ratings of MJE2955T

Ⅳ.Electrical Characteristics of MJE2955T(Tcase=25℃ unless otherwise specified)

Ⅴ.MJE2955T pin assignment

•Pin1(Base):Controls the biasing of the transistor
•Pin2(Collector):Electrons Emitted from Emitter Collected by the Collector
•Pin3(Emitter):Electrons emitted from the Emitter into the first PN junction

Ⅵ.Replacement model of MJE2955T

1.TIP3055:Similar to TIP35C, TIP3055 is an NPN transistor, but it can also be used instead of MJE2955T in some applications.

2.2N5885:This is another PNP type power transistor, similar to MJE2955T, commonly used in applications such as power amplifiers and switching power supplies.

3.2N3055:2N3055 is another NPN type power transistor, but in some cases, it can be used instead of MJE2955T, especially in some switching power supply designs.

4.MJ2955:MJ2955 is a derivative of MJE2955T and is often regarded as a similar substitute, especially in power amplifiers and switching power supply circuits.

5.TIP35C:Although TIP35C is an NPN transistor, it can be used interchangeably with MJE2955T in some applications, especially in power amplifiers where the output level is a mixture of NPN and PNP.

Ⅶ.MJE2955T thermal characteristics and heat dissipation

The MJE2955T is a bipolar transistor commonly used in high power and high frequency applications. Its thermal characteristics and heat dissipation performance depend on many factors, including the transistor's packaging, usage environment, current and voltage, etc.

Thermal characteristics mainly depend on the packaging and thermal resistance of the transistor. MJE2955T adopts T0-3 package, which has good heat dissipation performance, but you still need to pay attention to its thermal resistance. Thermal resistance is an important indicator to measure the heat dissipation performance of a transistor. It represents the temperature rise generated by the transistor under unit power consumption. A smaller thermal anode means the transistor has better heat dissipation properties.

The heat dissipation performance is also related to the use environment. If the transistor is installed in a confined space or on a poorly ventilated circuit board, it will cause the temperature to rise, affecting its performance and service life. Therefore, in order to maintain good heat dissipation performance, the MJE2955T should be installed in a well-ventilated location and maintain sufficient space for heat dissipation.

In addition, current and voltage will also affect the thermal characteristics and heat dissipation performance of MJE2955T. Using MJE2955T under high current and high voltage conditions will cause the transistor to heat up more seriously. In order to ensure safe and stable operation, appropriate current and voltage specifications should be selected according to actual needs and ensure that the ratings of the transistor are not exceeded.

In summary, the thermal characteristics and heat dissipation performance of the MJE2955T depend on several factors. In order to ensure its safe and stable operation, attention should be paid to selecting the appropriate package, installation location and usage environment, and avoiding use under high current and high voltage conditions.

Frequently Asked Questions

1.In which electronic applications is MJE2955T commonly used?
MJE2955T is commonly used in applications such as power amplifiers, switch-mode power supplies, linear regulators, and power control circuits.

2.How does MJE2955T contribute to power supply control circuits?
MJE2955T can be employed in power supply control circuits to regulate voltage or current, adapting to various application needs in dynamic power supply adjustments.

3.What is the typical power range for MJE2955T?
MJE2955T is often used in applications requiring medium to high power, providing a suitable solution for circuits with significant power requirements.

4.What are some considerations for proper heat dissipation when using MJE2955T?
Adequate heat dissipation is essential. Proper heat sinking and thermal management should be implemented, especially in high-power applications, to ensure the transistor operates within its specified temperature range.