STMicroelectronics 1-Element Uni-Directional TVS Diode 400W, 2-Pin DO-214 SMAJ28A-TR

STMicroelectronics SMAJ28A-TR is a 1-element, uni-directional Transient Voltage Suppressor (TVS) diode designed for high power, surface mount applications in electronic circuits. It is housed in a compact DO-214 package with 2 pins, suitable for efficient PCB mounting and assembly.

With a peak pulse power dissipation capability of 400 watts, this TVS diode is engineered to protect sensitive electronic components from damaging transient voltage surges typically caused by electrostatic discharge (ESD), lightning, or switching transients. The device features a minimum breakdown voltage of 31.1 V and operates effectively within a maximum reverse stand-off voltage of 28 V, ensuring robust circuit protection.

The SMAJ28A-TR maintains a clamping voltage of 59 V, safely limiting overvoltage conditions. It supports operation from a wide temperature range of -55°C to 150°C, making it suitable for applications in harsh industrial, commercial, and electronic environments.

This diode has a peak pulse current specification of 39 A and a maximum reverse leakage current of only 200 nA, demonstrating efficient blocking capability with minimal power loss. Its test current is rated at 1 mA, indicating stable and reliable device performance under nominal conditions.

The product is designed as a single-element chip, simplifying integration while enhancing reliability in transient suppression. Although it does not carry automotive certification, it fulfills critical requirements for industrial electronics, telecommunications, power supplies, and semiconductor manufacturing applications.

This TVS diode provides uni-directional transient voltage protection for circuits. With a peak pulse power dissipation of 400 watts, it safeguards electronics from voltage surges. The device features a minimum breakdown voltage of 31.1 V and a maximum reverse stand-off voltage of 28 V.

The package type is DO-214, optimized for surface mounting on PCB assemblies. Operating temperature ranges from -55°C to 150°C ensuring durability under varied environmental conditions. It has a clamping voltage of 59 V, providing effective voltage suppression during transient events.

The diode has a maximum peak pulse current rating of 39 A and a very low maximum reverse leakage current of 200 nA. Designed as a single-element chip with 2 pins for simple integration. Test current is rated at 1 mA, confirming its reliable operation in normal conditions.

Not compliant with automotive standards and has no special certifications listed.

This product is part of STMicroelectronics’ SMAJxxA series, known for reliable transient voltage suppression in various electronic and industrial applications. Available in surface mount form, it enables efficient automated assembly and enhanced manufacturability.

Discover more products in the TVS Diodes category for solutions in protecting electronic circuits against voltage spikes. STMicroelectronics offers a vast range of semiconductor components designed for power and signal integrity in demanding environments.