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Power Rectifier Diode Д151 Series (D151 Series)

Power rectifier diodes of the D151 series are stud diodes designed for general-purpose applications, capable of converting both direct and alternating currents up to 125A and 160A (depending on the series) with a frequency of up to 500 Hz in circuits with voltages ranging from 300V to 1600V. The diodes of the D151 series are identified by the RSD5 case type with an M12x1.5 mm thread and a weight of 0.165 kg.

These power diodes, featuring designations such as D151-125 and D151-160, are widely used as rectifying and demagnetizing diodes to prevent the harmful effects of switching overvoltages. They find applications in low-voltage rectifiers for welding and galvanic equipment, uncontrolled or semi-controlled rectifier bridges, as well as in electric generators for industrial and transport applications. For efficient heat dissipation, diodes are assembled with coolers (heat sinks) using a threaded connection. To ensure a reliable thermal and electrical contact between the diode and the cooler during assembly, it is crucial to adhere to the specified tightening torque (M2). Additionally, heat-conducting paste can be applied during assembly for enhanced heat dissipation. These diodes are manufactured for use in temperate, cold (UHL), or tropical (T) climates, falling under accommodation category 2. Detailed technical specifications, marking decoding, polarity, dimensions, applicable coolers, and installation and operation recommendations are provided below.

Diode Normal/Reverse Polarity

LJD 15116016 UHL2 

  • LJ-MD 
  • Д Diode
  • 151 Series 
  • 160  Maximum permissible on-state current in amperes
  • 16 Class designation based on repetitive reverse voltage in hundreds of volts
  • UHL2 Class designation based on repetitive reverse voltage in hundreds of volts

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