Leading Power Semiconductor Manufacturer

Power Rectifier Diode Д112 Series (D112 Series)

Power rectifier diodes belonging to the D112 series are classified as general-purpose pin diodes. These diodes are specifically engineered to convert both direct and alternating current, supporting currents of up to 25A, the exact value depending on the particular series. They operate within a frequency range of up to 500 Hz and are designed for circuits with a voltage rating spanning from 100 V to 1600 V. The polarity of these diodes is indicated by an icon on the case, with the base serving as the anode and the hard terminal as the cathode in the case of straight polarity. Conversely, when the polarity is reversed, the roles are switched, and the marking features the letter “X.”

The diodes of the D112 series adopt the RSD1 case type, which features an M5 thread and weighs 6 g. Standard ratings for the D112 series include D112-10, D112-10X, D112-16, D112-16X, D112-25, and D112-25X. To facilitate efficient heat dissipation, these diodes are assembled with coolers (radiators) using a threaded connection. During assembly, it is crucial to adhere to the specified torque, denoted as Md, to ensure reliable thermal and electrical contact between the diode and the cooler. Additionally, for enhanced heat dissipation, heat-conducting paste can be applied during assembly.

D112 power diodes find application as rectifying and demagnetizing diodes, serving to counteract the adverse effects of switching overvoltages. They are commonly employed in low-voltage rectifiers for welding and galvanic equipment, uncontrolled or semi-controlled rectifier bridges, and electric generators for both industrial and transport applications. Manufactured to withstand temperate, cold (UHL), or tropical (T) climates, these diodes fall under accommodation category 2.

Diode Normal/Reverse Polarity

LJD 11225 X16 UHL2 

  • LJ-MD 
  • Д Diode
  • 112 Series 
  • 25  Maximum permissible on-state current in amperes
  • X Polarity Identification: “X” denotes reverse; absence indicates normal polarity
  • 16 Class designation based on repetitive reverse voltage in hundreds of volts
  • UHL2 Class designation based on repetitive reverse voltage in hundreds of volts

For Symbols explanation CLICK HERE.


For Any Help Or Datasheet

Looking to revolutionize your power control solutions? Look no further. At LJ-MD, we specialize in delivering cutting-edge diode and thyristor technologies that meet the highest industry standards. With a strong focus on innovation, reliability, and performance, our products are designed to excel in a wide range of power applications.


From high surge current capability to precise power control, our diodes and thyristors offer exceptional features that cater to your specific needs. Whether you require efficient rectification, fast switching, or precise phase control, our products deliver reliable and precise results.


At LJ-MD, we understand that every project is unique. That’s why we provide personalized support and guidance to ensure you find the perfect solution for your requirements. Our team of experts is always ready to assist you in selecting the right product and providing technical assistance.


Don’t miss out on the opportunity to optimize your power control systems. Contact us today to discuss your project requirements, and let us help you find the ideal diode or thyristor solution to drive your success.

Please leave your contact information for us to get in touch with you.

We are open to manufacturing products at our production facilities according to your requests and technical specifications.