So if you looking for an NPN transistor that could switch loads of higher current then 2N2222A might the right choice for your project. 2N2222A can allow collector current upto 800mA and also has power dissipation of 652mW which can be used to drive larger loads than compared with BC547. But there are two important features that distinguish both. The 2N2222A transistor is very much similar to the commonly used NPN transistor BC547. When base current is removed the transistor becomes fully off, this stage is called as the Cut-off Region and the Base Emitter voltage could be around 660 mV.

This stage is called Saturation Region and the typical voltage allowed across the Collector-Emitter (V CE) or Base-Emitter (V BE) could be 200 and 900 mV respectively. When this transistor is fully biased then it can allow a maximum of 800mA to flow across the collector and emitter. To bias a transistor we have to supply current to base pin, this current (I B) should be limited to 5mA. The maximum amount of current that could flow through the Collector pin is 800mA, hence we cannot connect loads that consume more than 800mA using this transistor. 2N2222A has a gain value of 110 to 800, this value determines the amplification capacity of the transistor. RCA AV (Audio video) Cables, Adapters & ConvertersĢN2222A is a NPN transistor hence the collector and emitter will be left open (Reverse biased) when the base pin is held at ground and will be closed (Forward biased) when a signal is provided to base pin.Displayport (DP) Cables, Adapters & Converters.To safely run the transistor do not operate it above 40V, use a suitable base resistor to provide required base current, do not operate load above 500mA and always store or operate temperatures above -55 centigrade and below +150 centigrade. With these uses it can also be used to make darlington pairs and you can also replace this transistor with many similar characteristics BJT transistors.Įvery transistor has limitations and crossing these limitations will cause the device malfunction in your electronic circuit, so it is always recommended to use the transistors under their limitations defined by the manufacturers. Besides these uses it can also perform well in audio preamplifier circuits and in audio amplifier stages, moreover it can also be used at the output of small audio amplifiers to increase the output to drive small 200miliwatt to 2 watt speakers. This transistor can be used in a wide variety of electronics applications due to its good features, for example it can be used to drive many loads in electronic circuits like high power relays, few high power LEDs under 500mA, many small LEDs, another part in a circuit, high power transistors and more. A lot of good features in its TO-92 package makes this transistor an ideal TO-92 transistor to have in your lab.

The max transition frequency of the transistor is 250MHz due to which it can also perform well in RF projects under 250MHz. The collector to emitter voltage of the transistor is 40V due to which this transistor can be easily used in applications operating under 40V DC. The max collector current is 500mA that is quite enough to drive many loads in a circuit.

Max Storage & Operating temperature Should Be: -55 to +150 CentigradeĢN2222, P2N2222A, ECG123AP, BC537, BC538, (Pin configuration of some transistors may different from 2N4401, check pin configuration before replacing in a circuit)ĢN4401 Transistor Explained / Description:ĢN4401 is a commonly used transistor possess some very good features in its small package.

Minimum & Maximum DC Current Gain (h FE): 20 – 300.

Max Collector Dissipation (Pc): 625 miliWatt.

Max Collector-Emitter Voltage (V CE): 40V.

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2n2222 transistor equivalent 2n222