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 ... 2N3904 NPN SILICON TRANSISTOR UNISONIC TECHNOLOGIES CO., LTD 4 of 4 www.unisonic.com.tw QW-R201-027.G TYPICAL CHARACTERISTICS(Cont.) UTC assumes no responsibility for equipment failures that result from using products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or 2N2222 datasheet, 2N2222 pdf, 2N2222 data sheet, datasheet, data sheet, pdf Buy Transistor 2N3904 NPN General Purpose (bulk) ... Representative Datasheet, MFG may vary. You may also like: 2N3904RLRP. 2N2222A. 2N3906RLRP. BC547B. PN2222ABU ... 2N3904 General Purpose Transistors NPN TO-92 Page 1 31/05/05 V1.0 High Speed Switching Features: • NPN Silicon Planar Switching Transistors. • Fast switching devices exhibiting short turn-off and low saturation voltage characteristics. AUK Corp catalog First Page, datasheet, datasheet search, data sheet, datasheets, Datasheet search site for Electronic Components and Semiconductors, integrated circuits, diodes, triacs, semiconductors

Changjiang Electronics Tech (CJ) Changjiang Electronics Tech (CJ) 2N3904-TA US$0.02 LCSC electronic components online Transistors Transistors (NPN/PNP) leaded datasheet+inventory and pricing Changjiang Electronics Tech (CJ) Changjiang Electronics Tech (CJ) 2N3904-TA US$0.02 LCSC electronic components online Transistors Transistors (NPN/PNP) leaded datasheet+inventory and pricing 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

NPN General Purpose Amplifier This device is designed as a general purpose amplifier and switch. The useful dynamic range extends to 100 mA as a switch and to 100 MHz as an amplifier. Absolute Maximum Ratings* T A = 25°C unless otherwise noted * 2N3904 / MMBT3904 / PZT3904 2N3904 MMBT3904 PZT3904 NPN General Purpose Amplifier This device is designed as a general purpose amplifier and switch. The useful dynamic range extends to 100 mA as a switch and to 100 MHz as an amplifier. Sourced from Process 23. Absolute Maximum Ratings* TA = 25°C unless otherwise noted 2N3705 Bipolar Transistors Page 3 09/05/08 V1.1 Specifications VCEO (V) VCBO Maximum (V) IC (mA) hFE Minimum at IC = 50mA fT Minimum (MHz) Ptot (mW) Pakage Part Number 30 50 0.8 50 100 625 TO-92 2N3705 This is the Transistor Prototype PCB Design Kit with 2N3904 & 2N3906 Transistors.This kit is what you need to develop numerous different transistor circuits. It includes the extremely useful NightFire Prototype Transistor PCB along with some of the very popular 2N3904 NPN & 2N3906 PNP Transistors in the standard leaded TO-92 package. Nov 30, 2015 · The main difference is in Ft; typically 1100MHz for the SS9018 and 300MHz for the 2N3904. There are different rules-of-thumb for amplifiers; one says that Ft should be five times the required upper frequency. On that basis the 2N3904 is suitable for up to about 60MHz whilst the SS9018 will serve at over 200MHz.

2N3904 NPN SILICON TRANSISTOR UNISONIC TECHNOLOGIES CO., LTD 4 of 4 www.unisonic.com.tw QW-R201-027.G TYPICAL CHARACTERISTICS(Cont.) UTC assumes no responsibility for equipment failures that result from using products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or Dec 23, 2008 · Now you understand there are tremendous different result between the 2N3904 transistor datasheet and my test circuit, this is because the 2N3904 datasheet is measured using the PWM (Pulse Width Modulation) with period for about 300 us (micro second) and duty cycle for about 2%, the reason to use this very short pulse period method in the ... NPN General Purpose Amplifier This device is designed as a general purpose amplifier and switch. The useful dynamic range extends to 100 mA as a switch and to 100 MHz as an amplifier. Absolute Maximum Ratings* T A = 25°C unless otherwise noted *

Features, Applications: NPN silicon planar switching transistors. Fast switching devices exhibiting short turn-off and low saturation voltage characteristics. Title: LM108A/LM308A/LM108/LM308 - Operational Amplifiers Author: Linear Technology Corporation Subject |1021|1009|1154|1603|1503|1778| Keywords AUK Corp catalog First Page, datasheet, datasheet search, data sheet, datasheets, Datasheet search site for Electronic Components and Semiconductors, integrated circuits, diodes, triacs, semiconductors

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NPN General Purpose Amplifier This device is designed as a general purpose amplifier and switch. The useful dynamic range extends to 100 mA as a switch and to 100 MHz as an amplifier. Absolute Maximum Ratings* T A = 25°C unless otherwise noted Abstract: S1201 S1202 S3019 SDM7101-XC SDM7102-XC transistor 2n3904 Text: 1 MMBT3906LT1 Q3, NPN Transistor , 2N3904 1 MMBT3904LT1 Q2, NPN Transistor , 2N3904 1 MMBT3906LT1 Q1, PNP Transistor , 2N3906 3 S3019 with 1 x 9 Sumitomo 5 V Fiber Optics , process is a three transistor solution. 8. AC coupling is needed between the fiber optic modules (5 V 2N3904 results. BJT: 2N3904 2N3904-T18 2N3904A 2N3904C 2N3904CSM 2N3904DCSM 2N3904E 2N3904G 2N3904N 2N3904S (Marking ZC ) 2N3904SC (Marking ZCC ) 2N3904U (Marking ZC ) 2N3904V H2N3904 MOSFET: IGBT: SCR: The 2N3904 is a common NPN bipolar junction transistor used for general-purpose low-power amplifying or switching applications. It is designed for low current and power, medium voltage, and can operate at moderately high speeds. 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. This is the Transistor Prototype PCB Design Kit with 2N3904 & 2N3906 Transistors.This kit is what you need to develop numerous different transistor circuits. It includes the extremely useful NightFire Prototype Transistor PCB along with some of the very popular 2N3904 NPN & 2N3906 PNP Transistors in the standard leaded TO-92 package. NPN General Purpose Amplifier This device is designed as a general purpose amplifier and switch. The useful dynamic range extends to 100 mA as a switch and to 100 MHz as an amplifier. Absolute Maximum Ratings* T A = 25°C unless otherwise noted *

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Features, Applications: NPN silicon planar switching transistors. Fast switching devices exhibiting short turn-off and low saturation voltage characteristics.