STMicroelectronics

STTH4R02B

STTH4R02B Description

The STTH4R02B from STMicroelectronics is a 200V, 4A general-purpose fast recovery diode designed for high-efficiency power applications. Packaged in a DPAK (TO-252) surface-mount form factor, it features a fast recovery time of 30ns, making it ideal for switching circuits requiring minimal reverse recovery losses. With a low forward voltage drop of 1.05V at 4A, it ensures reduced conduction losses, enhancing overall system efficiency. The diode operates within a wide junction temperature range up to 175°C, ensuring reliability in demanding environments. Although marked as obsolete, it remains a robust choice for legacy designs due to its ROHS3 compliance and REACH-unaffected status.

STTH4R02B Features

• Fast Recovery Performance: Ultra-low 30ns reverse recovery time (trr) minimizes switching losses in high-frequency applications.
• High Current Handling: 4A average rectified current (Io) with 200V reverse voltage (Vr) capability.
• Low Power Dissipation: 1.05V max forward voltage (Vf) at 4A reduces thermal stress.
• Robust Packaging: DPAK (TO-252) surface-mount package offers mechanical durability and efficient heat dissipation.
• Wide Temperature Range: Operates up to 175°C junction temperature, suitable for industrial environments.
• Compliance: ROHS3 compliant and EAR99 classified for global export flexibility.

STTH4R02B Applications

• Switching Power Supplies: Efficient rectification in AC-DC converters, SMPS, and PFC circuits.
• Motor Drives: Fast recovery minimizes losses in inverters and H-bridge configurations.
• Automotive Systems: Suitable for auxiliary power modules due to high-temperature tolerance.
• Industrial Equipment: Used in welding machines, UPS systems, and other high-power switching applications.
• Legacy Designs: Despite obsolescence, it remains viable for maintenance and repair of existing electronics.

Conclusion of STTH4R02B

The STTH4R02B excels in high-speed switching and power rectification, offering a balance of low conduction losses, fast recovery, and thermal resilience. While newer alternatives may exist, its proven reliability and compliance with environmental standards make it a pragmatic choice for engineers maintaining or upgrading legacy systems. Its DPAK package ensures easy integration, while its 200V/4A rating caters to diverse medium-power applications. For designs prioritizing efficiency and durability, the STTH4R02B remains a technically sound solution.