onsemi

SMMBT5551LT3G

SMMBT5551LT3G Description

The SMMBT5551LT3G from onsemi is a high-performance NPN bipolar junction transistor (BJT) designed for general-purpose amplification and switching applications. Packaged in a compact SOT-23-3 surface-mount form factor, it offers a robust 160V collector-emitter breakdown voltage (V_CEO) and a 600mA continuous collector current (I_C), making it suitable for medium-power circuits. With a low V_CE(sat) of 200mV at 5mA base current (I_B) and 50mA collector current, it ensures efficient switching performance. The device is RoHS3 compliant, REACH unaffected, and rated for MSL 1 (unlimited shelf life), ensuring reliability in harsh environments.

SMMBT5551LT3G Features

• High Voltage Tolerance: 160V V_CEO for robust operation in high-voltage circuits.
• Low Saturation Voltage: 200mV @ 5mA I_B, 50mA I_C minimizes power loss in switching applications.
• High DC Current Gain (h_FE): 80 (min) @ 10mA I_C, 5V V_CE ensures strong signal amplification.
• Low Leakage Current: Collector cutoff current (I_CEO) of just 100nA enhances efficiency.
• Compact & Reliable: SOT-23-3 package with 225mW max power dissipation, ideal for space-constrained designs.
• Compliance: ROHS3, REACH, and EAR99 certified for global market suitability.

SMMBT5551LT3G Applications

• Power Management: Efficient switching in DC-DC converters, voltage regulators, and load switches.
• Signal Amplification: Audio preamps, sensor interfaces, and low-noise analog circuits.
• Industrial Controls: Relay drivers, motor controllers, and solenoid drivers due to high voltage tolerance.
• Consumer Electronics: Used in LED drivers, power supplies, and portable devices.
• Automotive Systems: Suitable for non-critical automotive electronics where reliability is key.

Conclusion of SMMBT5551LT3G

The SMMBT5551LT3G stands out as a versatile NPN transistor, combining high voltage capability, low saturation loss, and compact packaging. Its high h_FE and low leakage make it ideal for precision analog and switching applications, while its compliance and reliability ensure broad industrial adoption. Engineers can leverage its performance in power-efficient designs, particularly where space and efficiency are critical.