Collector-Emitter Saturation Voltage (VCE(sat)@Ic,Ib)
300mV@50mA,5mA
Collector Cut-Off Current (Icbo)
50nA
Package
SOT-23-3(TO-236-3)
Packaging
Bag-packed
Standard Package
3000
Weight
1
概要
The DIOTEC MMBT3904 is a versatile NPN transistor widely used for switching and amplification in low-power circuits. It is recognized for its high-reliability performance in both analog and digital applications. With its compact SOT-23 package, it is suitable for applications requiring space-saving designs. Its wide operating temperature range and good current handling make it ideal for general-purpose use.
特徴
Small SOT-23 package: Ensures compact design and space efficiency
High current gain: Optimized for reliable amplification
Maximum collector current of 200mA: Suitable for low-power circuits
Wide operating temperature range (-55°C to +150°C): Enhances durability
Fast switching capabilities: Good for high-speed circuit applications
応用
Signal amplification: For low-power audio and data signals
Switching applications: Suitable for small-scale circuit control
Oscillator circuits: Used in timing and wave-generation tasks
Motor driver circuits: Efficiently handles small motors
LED drivers: Adequate for low-current LEDs
Digital logic circuits: Useful in microcontroller-based designs
設計上の考慮事項
Ensure the collector-emitter voltage does not exceed its 40V rating to prevent breakdown failure.
Use a proper base resistor to limit the base current and prevent overdriving the transistor.
Validate thermal dissipation, ensuring the power dissipation of 350mW (max) is not exceeded in operation.
Design load current below 200mA to avoid overloading the transistor.
Implement adequate PCB spacing to minimize heat accumulation, especially in densely packed circuits.
よくある質問
Q: Can the MMBT3904 handle input voltages higher than 40V?
A: No, the maximum collector-emitter voltage rating is 40V; exceeding that can damage the transistor.
Q: Is the MMBT3904 suitable for high-current loads?
A: No, its maximum collector current is limited to 200mA, making it ideal for low-power applications.
Q: Can it be used in high-temperature environments?
A: Yes, it supports an operating temperature range of -55°C to +150°C.
Q: What leads to transistor overheating in circuits?
A: Overdriving the base current, exceeding the maximum collector current, or insufficient heat dissipation can cause overheating.
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