STMicroelectronics

STD1802T4-A

STD1802T4-A Description

The STD1802T4-A from STMicroelectronics is an NPN bipolar junction transistor (BJT) designed for high-performance switching and amplification applications. Encased in a DPAK (TO-252) surface-mount package, this transistor offers a robust 60V collector-emitter breakdown voltage (VCEO) and a maximum collector current (Ic) of 3A, making it suitable for medium-power circuits. With a transition frequency (fT) of 150MHz, it ensures efficient high-frequency operation, while its low Vce saturation voltage (400mV @ 150mA, 3A) minimizes power dissipation. The device is RoHS3 compliant and REACH unaffected, aligning with modern environmental standards.

STD1802T4-A Features

• High Voltage & Current Handling: Supports 60V VCEO and 3A Ic, ideal for power management.
• Low Saturation Voltage: 400mV @ 3A reduces heat generation, improving efficiency.
• High DC Current Gain (hFE): Min 200 @ 100mA, 2V ensures reliable amplification.
• Fast Switching: 150MHz transition frequency enables high-speed applications.
• Robust Packaging: DPAK (TO-252) offers thermal efficiency and mechanical stability.
• Environmental Compliance: RoHS3 compliant and MSL1 (unlimited shelf life).

STD1802T4-A Applications

The STD1802T4-A excels in:

• Power Supplies: Efficient switching in DC-DC converters and voltage regulators.
• Motor Control: Drives solenoids, relays, and small motors in automotive/industrial systems.
• Audio Amplifiers: High-gain stages in Class AB/B amplifiers due to its linear hFE.
• LED Drivers: Provides stable current control for high-brightness LED arrays.
• RF Circuits: Suitable for low-noise amplification in communication devices (up to 150MHz).

Conclusion of STD1802T4-A

The STD1802T4-A combines high voltage tolerance, fast switching, and low power loss, making it a versatile choice for power electronics and signal amplification. Its DPAK packaging ensures easy integration into surface-mount designs, while STMicroelectronics' reliability guarantees long-term performance. Though marked obsolete, it remains a viable option for legacy systems or designs prioritizing proven performance. Ideal for engineers seeking a balance of efficiency, speed, and durability in demanding applications.