**Technical Datasheet for SMMBT3904LT1G**
**I. Product Overview**
The SMMBT3904LT1G is a high-performance NPN silicon bipolar junction transistor (BJT) manufactured by ON Semiconductor. It comes in a compact SOT-23 package, offering efficient and reliable solutions for various electronic devices. With its eco-friendly compliance, AEC-Q101 certification, high gain-bandwidth, small package size, and high efficiency, this transistor finds wide applications in automotive electronics, consumer electronics, industrial controls, communication equipment, and more.
**II. Key Specifications**
- **Power Dissipation**: 300mW
- **Collector Current (Ic)**: 200mA
- **Collector-Emitter Breakdown Voltage (Vce)**: 40V
- **Transistor Type**: NPN
- **Package Type**: SOT-23-3 (TO-236)
- **Number of Pins**: 3
- **Operating Temperature Range**: -55°C to +150°C
- **Maximum Collector Current (IC)**: 0.2A
- **Collector-Emitter Voltage (VCEO)**: 40V
- **Collector-Base Voltage (VCBO)**: 60V
- **Emitter-Base Voltage (VEBO)**: 6.0V
- **DC Current Gain (hFE)**: Min. 30, typically 100 @ 10mA, 1V
- **Power Dissipation (Max)**: 300mW
- **Input Capacitance**: 8pF
- **Rise Time**: 35ns
- **Fall Time**: 50ns
- **Frequency**: 300MHz
**III. Product Features & Advantages**
1. **Eco-Friendly Compliance**: Compliant with RoHS standards, lead-free, halogen-free/BFR-free, suitable for environmentally sensitive applications.
2. **AEC-Q101 Certified**: Meets the high reliability standards for automotive electronic components, suitable for automotive and other high-reliability applications.
3. **High Gain-Bandwidth**: Offers a gain-bandwidth of 300MHz, suitable for high-frequency signal amplification and switching circuits.
4. **Small Package Size**: SOT-23 package, minimizing space requirements and facilitating use in high-density PCB designs.
5. **High Efficiency**: Low collector-emitter saturation voltage and high maximum DC collector current ensure efficient current transfer.
**IV. Applications**
- **Automotive Electronics**: Used in sensors, control units, and other automotive applications requiring high reliability and longevity.
- **Consumer Electronics**: Found in smartphones, laptops, tablets, and other devices for switching and amplification circuits, enhancing device performance.
- **Industrial Controls**: Plays a crucial role in industrial automation equipment and control systems, improving system stability and efficiency.
- **Communication Equipment**: Utilized in high-frequency signal amplification and switching circuits in routers, modems, and other devices, enhancing communication quality.
**V. Pinout Diagram & Package Dimensions**
The SMMBT3904LT1G's pinout is arranged as Collector, Base, Emitter. The package dimensions are 3.04mm length, 1.4mm width, and 1.01mm height. The pinout diagram and package footprint can be found in the product specification sheet for easy circuit design and layout.
**VI. Conclusion**
The SMMBT3904LT1G, with its superior performance and wide range of applications, is an indispensable component in electronic devices. Whether in automotive electronics, consumer electronics, industrial controls, or communication equipment, it provides stable and reliable signal amplification and switching functions, contributing to more efficient operation and superior performance of various devices.
