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Russian Low Frequency Thyristor T500 series

The T500 series power thyristor is a silicon semiconductor device designed for low-frequency operation in power circuits, featuring a diffusion p-n-p-n structure and a pill design. It is intended for use in both direct and alternating current power circuits with frequencies up to 500 Hz and a current strength not exceeding 500 A. The T500 series power thyristor is employed in static electric drive converters, high-voltage rectifier-inverter substations for transmission lines, as well as in direct and alternating current circuits of various power installations for general and special purposes.

Constructed in a metal-ceramic pill-shaped housing, the thyristor has flat bases serving as the anode and cathode. The polarity is determined by a symbol marked on the thyristor’s body. The thyristor requires forced cooling, and the recommended cooler types are 0243-150 and OM-104.

It is capable of operating in ambient temperatures ranging from -50 to +60 °C. The thyristor is manufactured in climatic versions “UHL” for placement category “2” and “T” for placement category “3” according to GOST 15150-69.

The T500 power thyristor can withstand sinusoidal vibrations in the frequency range of 1-100 Hz with an acceleration of 49 m/s² and multiple impacts lasting 2-15 ms with an acceleration of 147 m/s². The dimensional specifications are as follows:

  • Thyristor diameter: 73 mm
  • Contact surface diameter: 40 mm, 46 mm
  • Height: 22 mm

The thyristor’s weight is not more than 310 g. It falls under the quality categories “OTK” and “VP.” The technical specifications are:

  • For relays with acceptance “1,” in accordance with TU 16-529.863-74
  • For relays with acceptance “5,” in accordance with TU 16-729.029-76.
Thyristor Circuit Diagram

LJT 5006 

  • LJ-MD 
  • Thyristor
  • 500 Serial Number of the Structural Design, maximum current rating in open state, measured in amperes.
  • 320 Number Equal to the Maximum Current Value in the Open State in Amperes
  • 6 Class based on the repetitive voltage rating, denoted in hundreds of volts.

For Symbols explanation CLICK HERE.

Maximum permissible values of parameters at Tp=25°CParameter values at Tp=25°C
Tj = -60 ~ +125°C
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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.


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