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 ... 2N3903, 2N3904 General Purpose Transistors NPN Silicon Features • Pb−Free Packages are Available* MAXIMUM RATINGS Rating Symbol Value Unit Collector−Emitter Voltage VCEO 40 Vdc Collector−Base Voltage VCBO 60 Vdc Emitter−Base Voltage VEBO 6.0 Vdc Collector Current − Continuous IC 200 mAdc Total Device Dissipation @ TA = 25°C Derate ... DATA SHEETProduct specificationSupersedes data of 1997 Jul 151999 Apr 23DISCRETE SEMICONDUCTORS2N3904NPN switching transistorbook, halfpageM3D186 datasheet search, datasheets, Datasheet search site for Electronic Components and Semiconductors, integrated circuits, diodes and other semiconductors. 2N3904 / MMBT3904 / PZT3904. NPN General Purpose Amplifier (continued) Typical Characteristics (continued) Storage Time vs Collector Current. 1 10 100 Figure 2: 2N3904 circuit example - drawn in Scheme-it®. Since the 2N3904 is an NPN transistor, that means the base needs positive biasing (appropriate voltage levels and resistance) to turn on the collector emitter junction for proper current flow. 2N3904 General Purpose Transistors NPN TO-92 Page 1 12/05/08 V1.1 High Speed Switching Features: • NPN silicon planar switching transistors. • Fast switching devices exhibiting short turn-off and low saturation voltage characteristics. View similar products to the 2N3904 Transistor in the Transistors product category. Top of Page. Reviews. ... Part # 2N3904. Your Price $0.36 (2 Reviews) Details.

2N3904 Signal Transistor. Catalog №: 2762016. $2.00 Sold-out Online. Request notification Find a store. Tweet. Maximum Power Dissipation: 350 mW. Maximum Collector ... AUK Corp catalog First Page, datasheet, datasheet search, data sheet, datasheets, Datasheet search site for Electronic Components and Semiconductors, integrated circuits, diodes, triacs, semiconductors AUK Corp catalog First Page, datasheet, datasheet search, data sheet, datasheets, Datasheet search site for Electronic Components and Semiconductors, integrated circuits, diodes, triacs, semiconductors 2N3904 ND datasheet, cross reference, circuit and application notes in pdf format.

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 2N3904 Absolute maximum ratings Ta=25 °C Characteristic Symbol Ratings Unit Collector-Base voltage VCBO 60 V Collector-Emitter voltage VCEO 40 V Emitter-base voltage VEBO 6V Collector current IC 200 mA Collector dissipation PC 625 mW Junction temperature Tj 150 °C Storage temperature range Tstg-55~150 °C General Purpose Transistors(NPN Silicon), 2N3904 datasheet, 2N3904 circuit, 2N3904 data sheet : ONSEMI, alldatasheet, datasheet, Datasheet search site for Electronic Components and Semiconductors, integrated circuits, diodes, triacs, and other semiconductors.

2N3904 SC-43A plastic single-ended leaded (through hole) package; 3 leads SOT54 SYMBOL PARAMETER CONDITIONS MIN. MAX. UNIT VCBO collector-base voltage open emitter − 60 V VCEO collector-emitter voltage open base − 40 V VEBO emitter-base voltage open collector − 6V IC collector current (DC) − 200 mA ICM peak collector current − 300 mA NPN General Purpose Transistor UMT3904 / SST3904 / MMST3904 / 2N3904!Features 1) BVCEO > 40V (IC = 1mA) 2) Complements the UMT3906 / SST3906 / MMST3906 / 2N3906.!Package, marking and packaging specifications Part No. Packaging type Marking Code Basic ordering unit (pieces) UMT3904 UMT3 R1A T106 3000 SST3904 SST3 T116 3000 MMST3904 SMT3 T146 ... 1999 Apr 235Philips SemiconductorsProduct specificationNPN switching transistor2N3904PACKAGE OUTLINEUNITAREFERENCES datasheet search, datasheets, Datasheet search site for Electronic Components and Semiconductors, integrated circuits, diodes and other semiconductors. I have a ton of 2N3904 transistors and would like to use them for my RTL logic project. Based on what I could figure out on the web, and the parts I had, I've gotten logic gates to work quite well... NPN General Purpose Transistor UMT3904 / SST3904 / MMST3904 / 2N3904!Features 1) BVCEO > 40V (IC = 1mA) 2) Complements the UMT3906 / SST3906 / MMST3906 / 2N3906.!Package, marking and packaging specifications Part No. Packaging type Marking Code Basic ordering unit (pieces) UMT3904 UMT3 R1A T106 3000 SST3904 SST3 T116 3000 MMST3904 SMT3 T146 ... 2N3904 Datasheet (PDF) 1.1. 2n3904g.pdf Size:398K _upd SEMICONDUCTOR 2N3904 TECHNICAL DATA FEATURE NPN silicon epitaxial planar transistor for switching and TO-92 Amplifier applications As complementary type, the PNP transistor 2N3906 is Recommended 1. EMITTER 2. BASE 3.

2N3903, 2N3904 2N3903 is a Preferred Device General Purpose Transistors NPN Silicon Features • Pb−Free Packages are Available* MAXIMUM RATINGS Rating Symbol Value Unit Collector−Emitter Voltage VCEO 40 Vdc Collector−Base Voltage VCBO 60 Vdc Emitter−Base Voltage VEBO 6.0 Vdc Collector Current − Continuous IC 200 mAdc Total Device ... 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 Sep 10, 2016 · 2N3904 Datasheet - NPN 40V, 200mA Transistor - Onsemi, 2N3904 datasheet, 2N3904 pdf, 2N3904 pinout, 2N3904 equivalent, data, 2N3904 circuit, 2N3904 output. 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 Compare pricing for ON Semiconductor 2N3904BU across 27 distributors and discover alternative parts, CAD models, technical specifications, datasheets, and more on Octopart. 2N3904 Transistor and Specifications. 2N3904 Datasheet. 2N3904 Circuits. The 2N3904 is common general-purpose low-power NPN transistor used amplifying or switching applications. It is typically used for low-current, medium voltage, and moderate speed purposes.

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2N3904 SC-43A plastic single-ended leaded (through hole) package; 3 leads SOT54 SYMBOL PARAMETER CONDITIONS MIN. MAX. UNIT VCBO collector-base voltage open emitter − 60 V VCEO collector-emitter voltage open base − 40 V VEBO emitter-base voltage open collector − 6V IC collector current (DC) − 200 mA ICM peak collector current − 300 mA 2N2907A Small Signal Switching Transistor PNP Silicon Features • MIL−PRF−19500/291 Qualified • Available as JAN, JANTX, and JANTXV MAXIMUM RATINGS Rating Symbol Value Unit Collector−Emitter Voltage VCEO −60 Vdc Collector−Base Voltage VCBO −60 Vdc Emitter−Base Voltage VEBO −5.0 Vdc Collector Current − Continuous IC −600 mAdc I have a ton of 2N3904 transistors and would like to use them for my RTL logic project. Based on what I could figure out on the web, and the parts I had, I've gotten logic gates to work quite well...

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Figure 2: 2N3904 circuit example - drawn in Scheme-it®. Since the 2N3904 is an NPN transistor, that means the base needs positive biasing (appropriate voltage levels and resistance) to turn on the collector emitter junction for proper current flow. Compare pricing for ON Semiconductor 2N3904BU across 27 distributors and discover alternative parts, CAD models, technical specifications, datasheets, and more on Octopart. 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 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 2N3903, 2N3904 General Purpose Transistors NPN Silicon Features • Pb−Free Packages are Available* MAXIMUM RATINGS Rating Symbol Value Unit Collector−Emitter Voltage VCEO 40 Vdc Collector−Base Voltage VCBO 60 Vdc Emitter−Base Voltage VEBO 6.0 Vdc Collector Current − Continuous IC 200 mAdc Total Device Dissipation @ TA = 25°C Derate ...