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MDD MMBT3906 general-purpose PNP switching transistor, SOT-23 SMD package. Rated 40V, 200mW, 200mA collector current, hFE gain of 100–300.
The MMBT3906 is a widely used general-purpose PNP silicon switching transistor, the complementary counterpart to the NPN MMBT3904/2N3904. It’s rated for a maximum collector-base voltage of -40V, power dissipation of 200mW, and continuous collector current of -200mA, with a DC current gain (hFE) rank range of 100–300. Built using epitaxial planar die construction and housed in the compact SOT-23 surface-mount package, it operates across a wide -55°C to +150°C temperature range. Commonly used in general-purpose switching and small-signal amplification circuits, RoHS compliant.
| Weight (g) | NA |
|---|---|
| Brand / Manufacturer | MDD (Microdiode Semiconductor) |
| Key Specifications | PNP BJT · -40V · 200mW · -200mA · hFE 100-300 · SOT-23 · -55°C to 150°C · SMD |
| Manufacturer Part Number (MPN) | MMBT3906 |
| Country of Origin | Taiwan |
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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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5V passive piezo/electromagnetic buzzer, needs an external PWM/AC drive signal to produce sound (won't beep on direct DC power). Sold as a pack of 10.
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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.
Texas Instruments OPA333AIDBVR single-channel, zero-drift precision op-amp, SOT-23-5 SMD package. Ultra-low input offset voltage (2µV) and input bias current (70pA), with 350kHz gain bandwidth product. Compact 5-pin package suited for space-constrained precision analog designs.
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