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JCET 2N3904 general-purpose NPN bipolar transistor, TO-92 through-hole package. Rated 40V, 625mW, 200mA collector current, hFE gain of 100–300
The 2N3904 is one of the most widely used general-purpose NPN silicon transistors, suited for small-signal amplification and switching applications. It’s rated for a maximum collector-emitter voltage of 40V, power dissipation of 625mW, and continuous collector current of 200mA, with a typical DC current gain (hFE) between 100–300 depending on the collector current tested. Packaged in the industry-standard TO-92 case with 2.54mm lead pitch, it’s commonly used in LED/relay driver circuits, audio amplifier stages, and general switching applications. This specific part is manufactured by JCET under their “Tarange” branding, RoHS compliant.
| Weight (g) | NA |
|---|---|
| Brand / Manufacturer | JCET (product line: Tarange) |
| Key Specifications | Type: NPN BJT · VCEO: 40V · Power Dissipation: 625mW · Collector Current (IC): 200mA · Current Gain (hFE): 100 @ 10mA (typ., up to 300) · Package: TO-92 · Lead Pitch: 2.54mm · Mounting: Through Hole |
| Manufacturer Part Number (MPN) | 2N3904 |
| Country of Origin | Taiwan |
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25-in-1 magnetic suction screwdriver kit with interchangeable bits, magnetic handle, and extension rods. Includes 10 star/hexagon bits (T2–T15) among the full bit set, suited for precision electronics and small appliance repair.
DT830D pocket-size digital multimeter with LCD display, continuity buzzer, and square wave output. Measures DC/AC voltage, DC current, resistance, diode, and transistor hFE. Compact ABS body, includes test probe leads.
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Adjustable "third hand" workbench aid combining a magnifying glass, soldering iron holder, and crocodile clamps with built-in LED illumination. Dual-lens magnification (35X main lens, 12X accessory lens) with 2 LEDs for low-light work. Runs on AAA/AA batteries, holds PCBs and small parts steady during soldering or inspection.
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Micro-miniature 4-pin tact switch, TK-066S, 4.5x4.5mm footprint, snap-in through-hole mount. Momentary contact with excellent tactile feedback, good ESD resistance.
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24V sugar cube electromechanical relay, SPDT type, max 10A current capacity. Includes a built-in freewheeling diode to protect the driving microcontroller, PCB mount.
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EBYTE dual-band 2.4/5.8GHz high-gain fiberglass antenna (8/10dBi) with an N-J connector, designed for long-range outdoor WiFi/2.4GHz links in harsh weather conditions
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AMS1117-ADJ adjustable low dropout (LDO) linear voltage regulator, 1A, SOT-223 SMD package. Provides an adjustable output from 1.25V to 12V using two external resistors. Includes thermal shutdown and current-limit protection, sold as a pack of 5.
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AMS1117-2.5V fixed-output low dropout (LDO) linear voltage regulator, 1A, SOT-223 SMD package. Fixed 2.5V output with 2.5V dropout at full 1A load. Includes thermal shutdown and current-limit protection, sold as a pack of 5.
Texas Instruments LM2664M6 inductorless charge pump DC-DC converter, SOT-23-6 SMD package. Generates a positive-to-negative (inverting) fixed output from a positive input, 40mA max output current. Small-footprint alternative to inductive converters for negative-rail generation.
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XBLW MAX3485EDTR RS-485/RS-422 transceiver IC, SOP-8 surface-mount package. Half-duplex differential serial communication IC for industrial and embedded interface applications. Note: this is an XBLW-branded part, not genuine Maxim Integrated silicon.
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