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2N3904 / MMBT3904 / PZT3904. Typical Characteristics. Base-Emitter ON Voltage vs Collector Current. 0.1 1 10 100 0.2 0.4 0.6 0.8 1 V - BASE-EMITTER ON VOLTAGE (V) I - COLLECTOR CURRENT (mA) N) C. V = 5V. CE 25 °C 125 °C - 40 °C. NPN General Purpose Amplifier (continued) Base-Emitter Saturation Voltage vs Collector Current . 0.1 1 10 100 0.4 0.6 0.8 1 Browse Cadence PSpice Model Library . Cadence® PSpice technology offers more than 33,000 models covering various types of devices that are included in the PSpice Lite software. Download PSpice Lite for free and get all the Cadence PSpice models.
2N3904 MMBT390 4 MMPQ390 4 PZT3904 NPN General Purpose Amplifier This device is designed as a general purpose amplif ier and switch. The useful dynamic range extends to 100 mA as a swi tch and to 100 MHz as an amplifier. Sourced from Process 23. Absolute Maximum Ratings* TA = 25°C unless otherwise noted 1996. 1. 28 1/3 semiconductor technical data kn3904 epitaxial planar npn transistor revision no : 0 general purpose application. switching application. 2N3904 datasheet, 2N3904 pdf, 2N3904 data sheet, datasheet, data sheet, pdf
The 2N3904 is rated for a maximum of 40V between Collector and Emitter, and 200mA Collector current. Your circuit is only powered with 9V, and the current passing through each transistor is limited to less than 20mA, so any replacement that can handle eg. 20V and 100mA will be fine. Next is Electrical Characteristics. Schematic of very Simple preamplifiers using 2N3904. In electronics, a common emitter amplifier is used as a voltage amplifier. In this circuit the base terminal of the transistor serves as the input, the collector is the output, and the emitter is common. The 2N3904 is an extremely popular NPN transistor that is used as a simple electronic switch or amplifier that can handle 200 mA (absolute maximum) and frequencies as high as 100 MHz when used as an amplifier. The 2N3904 is an extremely popular NPN transistor that is used as a simple electronic switch or amplifier that can handle 200 mA (absolute maximum) and frequencies as high as 100 MHz when used as an amplifier. At 20mA, that's about 120 Ohms. The current gain depends on the collector current, but figure on 50. With a base current of 20mA, that's a collector current of way more than the 2N3904 can handle, so 20mA will saturate it thoroughly. You can probably get by with a lower base current. Look at a 2N3904 datasheet for gain at different collector ...