# MMBT3904LT1G (Component) ## Description Bipolar (BJT) Transistor NPN 40V 200 mA 300MHz 300 mW Surface Mount SOT-23-3 (TO-236) The MMBT3904LT1G is a general-purpose NPN bipolar junction transistor designed for switching and amplification applications. It is housed in a compact SOT-23 surface-mount package, making it suitable for high-density PCB designs. This transistor is widely used in low-power signal processing, digital switching, and analog amplification circuits due to its reliable performance and fast switching characteristics. Key Features General-purpose NPN transistor Compact SOT-23 surface-mount package Fast switching speed Low saturation voltage Suitable for low-current and low-power applications High reliability and stability Pb-free, Halogen-free, and RoHS compliant Electrical Characteristics (Typical @ 25°C unless otherwise specified) Collector-Emitter Voltage (VCEO): 40 V Collector-Base Voltage (VCBO): 60 V Emitter-Base Voltage (VEBO): 6 V Collector Current (IC): 200 mA (max) DC Current Gain (hFE): 100 – 300 Collector-Emitter Saturation Voltage (VCE(sat)): 0.2 V (typ) Transition Frequency (fT): ~300 MHz Absolute Maximum Ratings Collector Current (Continuous): 200 mA Power Dissipation: ~225 mW Junction Temperature: +150°C (max) Operating Temperature Range: -55°C to +150°C Storage Temperature Range: -55°C to +150°C Mechanical Characteristics Package Type: SOT-23 (TO-236AB) Mounting Type: Surface Mount Number of Pins: 3 Marking Code: Dependent on lot/manufacturer marking Applications General-purpose switching circuits Signal amplification Digital logic interfacing LED drivers and small load switching Audio and RF signal processing #CommonPartsLibrary #TransistorBJT #MMBT2222 ## Component Details - **Owner:** openpartlist - **Created:** 2/15/2024 - **Last Updated:** 4/30/2026 - **Visibility:** Public - **Manufacturer Part Number:** MMBT3904LT1G - **Datasheet URL:** https://www.onsemi.com/pdf/datasheet/mmbt3904lt1-d.pdf - **Manufacturer Name:** onsemi - **Part Type:** Transistor - **License:** https://creativecommons.org/licenses/by/4.0/ - **Used in:** 1548 projects - **Forks:** 2 ## Distributor Pricing (qty 1) *Pricing shown for quantity 1. For price breaks and other quantities, open in Flux.* | Distributor | Unit Price (qty 1) | Stock | |------------|--------------------|-------| | [Arrow](https://www.arrow.com/en/products/mmbt3904lt1g/on-semiconductor.html?utm_currency=USD&region=nac) | $0.1096 | 11 | | [Digi-Key](https://www.digikey.com/en/products/detail/onsemi/MMBT3904LT1G/919601) | N/A | N/A | | [LCSC](https://www.lcsc.com/product-detail/C81464.html) | N/A | N/A | | [Mouser](https://www.mouser.com/en/ProductDetail/onsemi/MMBT3904LT1G?qs=HVbQlW5zcXUYZ2Fy0YF3FQ%3D%3D) | $0.14 | 417K | | [TME](https://www.tme.com/us/en-us/katalog/?queryPhrase=MMBT3904LT1G) | N/A | N/A | | [Verical](https://www.verical.com/pd/on-semiconductor-bjt---general-purpose-MMBT3904LT1G-7530502) | N/A | N/A | - **Part Type:** Transistors - **Sub-Type:** NPN - **Manufacturer:** ON Semiconductor - **MPN:** MMBT3904LT1G - **Mount Type:** Surface Mount - **Package / Case Code:** SOT-23-6 - **Pin Count:** 3 - **Compliance:** Rohs, Pb-Free, Halogen Free ## Pins | Pin | Name | Type | |-----|------|------| | 1 | B | | | 2 | E | | | 3 | C | | --- *Generated from [https://www.flux.ai/openpartlist/mmbt3904lt1g~s5](https://www.flux.ai/openpartlist/mmbt3904lt1g~s5)*