MMBT3904 Surface Mount NPN Transistor
The MMBT3904 is the SOT-23 SMD version of the 2N3904, offering the same <1W dissipation for space-constrained PCB designs in smartphones and wearables. Classified HTS 8541.21.00.95 as low-power discrete transistor. Ideal for high-volume surface mount assembly.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If integrated with other amplifiers in IC form
When combined with resistors/capacitors into monolithic ICs, becomes integrated circuits.
If mounted on ceramic substrate
Hybrid microcircuits with discrete transistors on ceramic bases go to connections heading.
If for laser diode drivers
Transistors specifically for lasers in optical instruments shift to liquid crystal devices.
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Import Tips & Compliance
• Include MSL (Moisture Sensitivity Level) ratings and require dry packing for humidity protection
• Tape-and-reel packaging mandatory for automated pick-and-place; verify reel dimensions
• Validate lead-free (Pb-free) status with XRF testing certificates for compliance
Related Products under HTS 8541.21.00.95
BC547 NPN Bipolar Junction Transistor
The BC547 is a general-purpose NPN bipolar junction transistor used in amplification and switching circuits with a power dissipation rating below 1W (typically 500mW). It falls under HTS 8541.21.00.95 as a non-photosensitive transistor with dissipation less than 1W, distinct from power transistors. Commonly found in consumer electronics like radios and sensors.
2N3904 NPN Switching Transistor
The 2N3904 is a low-power NPN transistor ideal for general-purpose switching and signal amplification in hobbyist and commercial electronics, with maximum dissipation of 625mW. Classified under HTS 8541.21.00.95 for transistors under 1W excluding photosensitive types. Widely used in Arduino projects and small signal circuits.
BF199 NPN RF Transistor
The BF199 is a silicon NPN transistor optimized for RF amplification in VHF/UHF applications with dissipation under 1W. It qualifies for HTS 8541.21.00.95 as a low-power, non-photosensitive transistor. Used in radio receivers and wireless communication modules.
PN2222A NPN General Purpose Transistor
PN2222A is a versatile NPN transistor for low to medium current switching up to 600mA with 625mW dissipation, perfect for logic level driving. Falls under HTS 8541.21.00.95 for small signal transistors under 1W. Essential component in DIY electronics and IoT devices.
JFET 2N3819 N-Channel Transistor
The 2N3819 is a high-frequency N-channel JFET transistor for RF preamplifiers and choppers with dissipation under 1W. Qualifies for HTS 8541.21.00.95 as non-photosensitive, low-power field-effect transistor. Used in audio and instrumentation amplifiers.
S8050 NPN Medium Power Transistor
S8050 is a TO-92 plastic package NPN transistor handling 700mA with 625mW dissipation for relay drivers and LED control. Fits HTS 8541.21.00.95 criteria for <1W transistors. Popular in power supplies and motor controls.