MMBT3904-7-F.pdf
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MMBT3904-7-F is one of the most commonly used low-power NPN transistors in SMD format, providing an ideal balance of performance, size and cost for modern electronics.
This device operates as a standard NPN BJT, amplifying base current to control collector current flow. It can function in both linear (analog) and saturation (switching) modes, supporting broad application flexibility.
It supports typical collector currents around 200 mA and offers stable DC gain across low-to-medium current regions. A low collector–emitter saturation voltage improves energy efficiency when used as a digital switch or LED driver.
The MMBT3904-7-F provides fast rise and fall times, making it well suited for pulse shaping, clock circuits, high-speed digital switching, and MOSFET pre-drive applications.
Diodes Inc. ensures tight manufacturing tolerances and long-term reliability. The SOT-23 package provides good thermal conduction for low-power switching and helps maintain consistent behaviour across temperature variations.
The transistor's SOT-23 footprint fits dense PCB layouts and is fully compatible with automated SMT assembly. Low parasitics enhance signal response and reduce switching losses.
Ideal for logic-level switching, analog amplification, sensor interfaces, LED biasing, driver circuits, and small-signal processing in consumer and industrial electronics.
| Transistor Type | NPN Small-Signal BJT |
|---|---|
| Package | SOT-23 (SMD) |
| Collector Current (Ic) | Typically up to 200 mA |
| Collector–Emitter Voltage (Vceo) | 40 V typical (3904 family) |
| Gain (hFE) | Stable hFE across common load ranges |
| Saturation Voltage | Low Vce(sat), improving switching efficiency |
| Switching Speed | Fast for digital and MOSFET drive use |
| Mounting | Surface-mount, reflow compatible |
| Manufacturer | Diodes Incorporated |
The MMBT3904-7-F uses the standard NPN SOT-23 transistor pin arrangement:
1 – Base
2 – Emitter
3 – Collector
The SOT-23 surface-mount package enables compact board layouts with strong manufacturing compatibility. It offers low parasitic characteristics that enhance high-frequency switching and analog signal accuracy.
Logic switching, buffering, bias circuits, signal amplification.
MOSFET gate drivers, LED drivers, and small relay pre-drive stages.
Used in high-speed switching and digital signal control applications.
Low-power amplification, filtering, and small-signal waveform shaping.
Equivalent or similar NPN transistors include 2N3904, MMBT2222, and comparable small-signal NPN BJTs with SOT-23 packaging. Engineers should match Ic, Vceo and gain requirements.
Diodes Incorporated is known for high-volume production of discrete semiconductors, offering excellent electrical consistency, reliable sourcing and long-term supply for commercial and industrial OEM applications.
We currently provide peer-to-peer order processing. Submit an RFQ for MMBT3904-7-F, and our professional agent will contact you with competitive global pricing and guide you to complete the order once you accept the offer.
Our experienced QC team strictly verifies and tests MMBT3904-7-F. Only qualified suppliers who pass our audit can list MMBT3904-7-F on OEM STOCK GLOBAL LIMITED. We pay close attention to sourcing channels and product quality so you can purchase with confidence.
Pricing and inventory for MMBT3904-7-F fluctuate and are updated periodically (typically within 24 hours). Quotations generally remain valid for 5 days unless otherwise stated.
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We perform Pre-Shipment Inspection (PSI) on randomly selected units before shipping. If there is an issue with MMBT3904-7-F, returns/replacements are accepted when:
Steps: (1) Inform us within 90 days; (2) Obtain Return Authorization (RMA) before sending items back.
Please contact us for technical documents and support related to Diodes Incorporated MMBT3904-7-F, including pin diagrams and datasheets. Our team will respond promptly.
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