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

20 A and 50 A on-state RMS current-rated SCRs with enhanced immunity and 150°C Tj max

ST's new series of 20 A and 50 A silicon controlled rectifiers (SCRs) adds to our existing range of high-temperature thyristors:

Designed for low profile and reduced power consumption modules, these are ideal for solid-state relays, SMPS or battery chargers.  

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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