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.

Thyristors (SCR) portfolio

First automotive-grade 1200V thyristor (SCR) in D²PAK package

ST has extended 1200 V SCR series with the TN3050H-12GY-TR, an automotive-grade 30 A thyristor. Designed for 2 to 7 kW on-board chargers in bridge or bridgeless topologies, it also fits AC-DC rectification in UPS and battery charger applications, motor drives or the back-to-back switch of solid-state relays. Fully rated at 150 °C and housed in the D²PAK package, it offers a robust switch – 1 kV/µs immunity, 1400 V surge – for compact SMD design with full AEC-Q101 compliance.
A TO-247 package version also exists, the  TN3050H-12WY.