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