The saturation voltage of most BJT transistors are 0.6V but the C945 has only 0.3V therefore it can perform well in low voltage circuits or in any circuit where low base voltage is available and other BJT transistors are not saturating. Moreover the transistor is also low noise device, and has a good DC current gain that is 70 to 700.Īs discussed above the transistor has a good DC current gain and low noise type due to which it is ideal to use in audio preamplifier & audio amplifier circuits stages or amplification of other signals in electronic circuits. The saturation voltage of the transistor is only 0.3V which is also a good feature of this transistor. It is manufactured in TO-93 package, the max load this transistor can drive is around 150mA or 0.15A that is enough to operate many devices in a circuit for example LEDs, Relays, ICs, transistors and other parts of a circuit. Max Storage & Operating temperature Should Be: -55 to +150 CentigradeĢN2222, 2N3904, 2SC1815, 2SC3198 (Pin configuration of SOME transistors are different from C945, check pin configuration before replacing in a circuit)Ĭ945 is a general purpose NPN transistor used in wide variety of commercial and educational electronic circuits.

Minimum & Maximum DC Current Gain (h FE): 70 – 700.Max Collector Dissipation (Pc): 400 miliWatt.Max Collector-Emitter Voltage (V CE): 50V.Do not operate or store the transistor at temperatures below -55 Celsius or above 150 centigrade.Advertisements Features / technical specifications: We could make use of a base resistor to supply the required base current to the transistor.

We could operate it under the maximum collector-emitter voltage. To ensure the long-term effectiveness of this transistor, it is advised not to drive the load to more than 150mA when using this transistor. However, make sure you follow the pinouts that are mentioned in the previous section about the beware attention. In this case, you may attempt the 2N3904 transistor manufactured by ON semiconductors. An alternative to using to switch applications is 2N2222.īut this transistor is not as modern and is not readily accessible for those living located in Asian or European countries. It is capable of switching loads up to 50V, but it has a low current limit of just 150mA, so it is not an ideal choice for being employed as a switch. If it is used as a switch it is easily controlled by an MCU/MPU as it is equipped with an operating voltage of 5V. It also functions as an oscillator in conjunction with the A733 transistor. Therefore, it is widely employed in Transistors for pre amplifying purposes, as well as in high-frequency circuits. It has a high gains value (hfe) of up to 700 and is very linear. The C945 is an old Japanese Bipolar audio frequency NPN transistor.

Everything You Need to Know About C945 in Electronics

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