High-temperature silicon-controlled rectifiers (SCRs), or thyristors, are designed to improve the reliability of applications such as overvoltage crowbar protection and motor control circuits in power tools and kitchen aids, inrush current-limiters, capacitive discharge ignition systems and voltage regulators. Perfectly suited for automotive stationary battery chargers, uninterruptible power supplies, industrial power supplies, motorbike voltage regulators and motor drive applications, they help reduce costs by using smaller heatsinks.
Their voltage robustness up to 1200 V, high noise immunity and power dissipation performance at 150 °C Tj are key features for functions such as AC switches, AC phasing inverters, and AC-DC controlled rectifier bridges.

Available in SMD as well as through-hole-isolated and non-isolated packages, ST's high-Tj SCRs feature:
• a very low gate-triggering current (600 V SCRs only)
• a peak off-state voltage (blocking voltage) from 600 V up to 1200 V
• a maximum on-state current from 12 A to 50 A
• a maximum junction temperature of 150°C

ST's new series of 40 A on-state RMS current-rated silicon-controlled rectifiers (SCRs) 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

First automotive-grade thyristor (SCR) in D²PAK package

ST extends its 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.

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