Silicon-controlled rectifiers (SCR), also known as thyristors, are symmetrical blocking unidirectional switching devices. They are designed in back-to-back AC circuits, resonant-pulse mode converters and rectifier-bridge converters. With RMS current ratings up to 80 A and voltage ratings up to 1200 V, ST’s SCRs are available in a large range of through-hole and surface-mount packages.

ST's thyristor (SCR) portfolio features:
• Logic-level SCRs, easy to drive thanks to their very low gate trigger current.
• Standard SCRs, ideal for general-purpose switching applications, such as and AC-AC
  or AC-DC motor control.
• High-temperature SCRs, extend SCR application operation up to 150 °C, while
  offering improved dynamic performance. Includes automotive-grade versions.

40 A on-state RMS current-rated SCRs to complete our existing range of 12 to 20 A range of high-temperature thyristors

The new TN4015H series of SCRs are more gate-sensitive compared with previous generations, while delivering best-in-class electrical noise immunity and ever-increasing the reliability of the end products.
Operating with junction temperatures of up to 150 °C, these SCRs are available in 3 package versions:
       • D²PAK as TN4015H-6G/-TR,
       • TO-220AB as TN4015H-6T,
       • TO-220AB insulated package as TN4015H-6I