NTE2697 vs NTE32
| Part Number |
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| Category | Transistors - Bipolar (BJT) - Single | Transistors - Bipolar (BJT) - Single |
| Manufacturer | NTE Electronics, Inc | NTE Electronics, Inc |
| Description | T-NPN SI 200V 7A TO-220 | T-PNP SI VERT/SND OUTPUT TO-92M |
| Package | Bag | Bag |
| Series | - | - |
| Operating Temperature | 150°C (TJ) | 150°C (TJ) |
| Mounting Type | Through Hole | Through Hole |
| Package / Case | TO-220-3 | TO-226-3, TO-92-3 Long Body |
| Supplier Device Package | TO-220 | TO-92L |
| Power - Max | 50 W | 900 mW |
| Transistor Type | NPN | PNP |
| Current - Collector (Ic) (Max) | 7 A | 1 A |
| Voltage - Collector Emitter Breakdown (Max) | 120 V | 160 V |
| Vce Saturation (Max) @ Ib, Ic | 500mV @ 300mA, 3A | 1.5V @ 50mA, 500mA |
| Current - Collector Cutoff (Max) | 100µA (ICBO) | 1µA (ICBO) |
| DC Current Gain (hFE) (Min) @ Ic, Vce | 100 @ 3A, 4V | 100 @ 200mA, 5V |
| Frequency - Transition | - | 15MHz |
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1. Is BJT bipolar or unipolar?
BJT (bipolar junction transistor) is bipolar. BJT (bipolar junction transistor) is composed of two N-type semiconductors sandwiched between a P-type semiconductor, with an emitter junction formed between the emitter and the base, and a collector junction formed between the collector and the base. When the power is turned on, the majority carriers (electrons) in the emitter and the majority carriers (holes) in the base diffuse with each other, forming a current amplification effect.
The working principle of BJT is to achieve current amplification through the control of two PN junctions (emitter junction and collector junction). When the emitter junction is forward biased, electrons are injected from the emitter region into the base region; when the collector junction is reverse biased, electrons are injected from the base region into the collector region. Because the base region is very thin and the impurity content is strictly controlled, most electrons can enter the collector region through the collector junction to form the collector current Ic, and only a small number of electrons recombine with holes in the base region to form the base current Ib. Therefore, by controlling the base current Ib, the collector current Ic can be amplified to achieve current amplification. -
2. Is PNP transistor bipolar?
PNP transistor is a bipolar transistor. PNP transistor is a bipolar transistor used in electronic circuits to amplify, switch and control current. Its name "PNP" represents the three different semiconductor regions in its structure: two positive poles (P type) and one negative pole (N type).
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3. Are bipolar transistors still in use?
Bipolar transistors are still in use and play an important role in many fields. Bipolar transistors, the full name of which is bipolar junction transistor (BJT), commonly known as triode, are electronic devices with three terminals, made of three parts of semiconductors with different doping levels. Its working principle involves the flow of two carriers, electrons and holes, so it is called bipolar.
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4. What are the two types of BJT transistors?
There are two main types of BJT transistors: NPN and PNP.
NPN transistor
In an NPN transistor, current flows from the collector to the emitter. The base of an NPN transistor must be connected to a positive voltage for current to flow in. As the current flowing to the base increases, the transistor gradually turns on until the current is completely conducted from the collector to the emitter.
PNP Transistor
In a PNP transistor, the current flows from the emitter to the collector. Therefore, the base of the PNP transistor must be grounded. When the output current is small and the base is negative relative to the emitter, the transistor will turn on and a larger current will flow from the emitter to the collector. Basically, if the base and collector are negative relative to the emitter, the PNP transistor will conduct current from the emitter to the collector.
