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. Read the datasheet. Input and output voltage are only guaranteed to within 3V of the supplies and minimum supply voltage is spec'ed at 10V. It will likely operate at a lower supply voltage and, if you're lucky, you'll be able to find a unit that gives better than typical voltage swings.
2N3904 vs 2N2222. The 2N3904 and the 2N2222 are 2 of the most popular NPN bipolar junction transistors in the electronics market. In case you're curious about which to use, or which one is better or superior than the other, in this article, we compare and contrast the 2 transistors. (For the above measured 2N3904, the Early voltage ranges from 100 to 150 V. That is the extrapolated characteristic curves do not intersect at a point.) The actual relationship between the collector current (I C) and the controlling base current (I B) and collector-emitter voltage drop (V CE) is some complicated function which we can denote:
2N3904 / MMBT3904 / PZT3904 NPN General Purpose Amplifier (continued) Typical Characteristics (continued) Storage Time vs Collector Current 1 10 100 5 10 100 500 2n3904s revision no : 4 c 0 collector current i (ma) collector current i (ma) 0 c 0 base-emitter voltage v (v)be i - vc be 10 dc current gain h fe 0.1 0.3 1 3 collector current i (ma)c 0 collector-emitter voltage v (v)ce i - vc ce h - i collector current i (ma)c collector-emitter saturation ce(sat) v - i Catalog > RELAYS > V23054-E1019-W135. Product Information. Full Size. Zoom. V23054-E1019-W135. Condition : New V23054-E1019-W135 SIEMENS RELAY . 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 ...
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. 2N3904 / MMBT3904 / PZT3904 NPN General Purpose Amplifier (continued) Typical Characteristics (continued) Storage Time vs Collector Current 1 10 100 5 10 100 500 Read the datasheet. Input and output voltage are only guaranteed to within 3V of the supplies and minimum supply voltage is spec'ed at 10V. It will likely operate at a lower supply voltage and, if you're lucky, you'll be able to find a unit that gives better than typical voltage swings. Compare pricing for NTE Electronics 2N3904 across 6 distributors and discover alternative parts, CAD models, technical specifications, datasheets, and more on Octopart. 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
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Apr 11, 2009 · I'm having trouble figuring out what resistor I should use on base when wiring up a NPN transistor. So, everything runs at 5 volts. The maximum current a 3904 can handle is 100ma, so is it okay too choose a resistor for a 100ma current so anything I hook up will work as long as it takes less than 100ma? 2N3904 NPN General Propose Transistor ... 2N3904 NPN General Purpose Transistor; Home / ... Datasheet: Click Here Specifications
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. Transistor 2N3906 pequeña señal. Este transistor cuenta con conmutación rápida, por lo tanto es adecuado para la conmutación y amplificación. V23054-E datasheet, cross reference, circuit and application notes in pdf format.