High-temperature Thyristors (SCR)

The small power losses of the High-temperature silicon-controlled rectifiers (SCRs) range allow more density at 150°C. The circuit will then be able to draw more current or the heatsinking will be reduced accordingly in all inrush current limiters, converters and SSRs. The transient immunity has been maxed out and the triggering current of the gate kept low. The trade-off is a tight one, so that only the finest ST technology could tune it. High-temperature Thyristors belong to our STPOWER family.

Together with the innovative surface mount D3PAK package it is one more step towards power density in EV battery chargers, industrial power supplies, charging stations, motorbike voltage regulators, motor drive applications and uninterruptible power supplies (UPS) converters. The expanding 1200 V automotive grade SCR range is a bonus for the relevant segment; and this quality benchmark beneficiates all SCR production lines. 

The TN1610H-6I, TN2010H-6I & TN2015H-6I are new 16 and 20 A, 600 V Thyristor in TO-220 – insulated package. Used in controlled rectifier bridge, AC relay or as HV crowbar protection for SMPS, it perfectly suits compact power modules with a 1000 V/µs noise immunity. Be it for motorcycle voltage regulator or motor starter, the 150°C junction temperature gives headroom for smaller heatsink and higher load control.   

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 80 A
  • a maximum junction temperature of 150°C

Discover how to protect againts greater voltage spikes with High-Temperature Thyristors such as TN5015H-6G (50 A on-state current, 600 V off-state voltage).

20 A, 30A and 50 A on-state RMS current-rated SCRs with enhanced immunity and 150°C Tj max

ST's new series of 20 A, 30 A and 50 A silicon controlled rectifiers (SCRs) adds to our existing range of high-temperature thyristors:

  • The new TN2010H series of SCRs has a narrower spread gate-triggering current – 5 mA typ. and 10 mA max. – than previous generations, while delivering high electrical noise immunity and further improving the reliability of the end products.
  • The new TN3015H series of SCRs featuring 1000 V/µs high-noise-immunity provides high compactness power modules designers with an high margin on performances and reliability. The 15 mA gate current makes it easily driveable by microcontrollers. It is available in a TO-220, TO-220AB Ins. and D2PAK package outline. 
  • The new TN5015H series of SCRs includes the largest SCR fitted in a TO-220 package outline. This performs as an excellent crowbar circuit due to its large die size and surge on-state current (ITSM). The 15 mA gate current makes it easily driveable by microcontrollers.

Designed for low profile and reduced power consumption modules, these are ideal for solid-state relays, SMPS or battery chargers.
Get started with STEVAL-SCR001V1 –  ST's inrush current limiter solution board – embedding our bypass thyristor !


eDesignSuite is a comprehensive set of easy-to-use design-aid utilities ready to help you streamline the system development process with a wide range of ST products.

Power Management Design Center

Thermal-electrical Simulators for Components

Signal Conditioning Design Tool

NFC/RFID Calculators

Choose design tool:

Power Supply Design Tool

SMPS design, by topology, by type and by product
PFC design with analog and digitial control
Supports various PCB configurations
Choose type:
Solar Battery Charger

LED Lighting Design Tool

Handles AC-DC and DC-DC design in common topologies
Displays interactive and annotated schematic
Provides current/voltage graphs, Bode plots, efficiency curves and power-loss data
Choose type:

Digital Power Workbench

Provides a step-by-step optimized design of power section and control loop
Generates the STM32Cube embedded software package for custom applications and allows firmware project generation, compatible with multiple STM32 IDEs

Power Tree Designer

Specify input/output power for each node in the tree
Check for consistency
Design each individual node
Choose design tool:

AC Switches Simulator

Select ratings and application waveforms
Get junction temperature and blocking voltage graphs
Search and sort suitable devices

Rectifier Diodes Simulator

Select ratings and application waveforms
Estimate power losses
Search and sort suitable devices


Supports long mission profiles
Provides power loss and temperature graphs
Helps define heatsink thermal properties

Twister Sim

Help select the right ViPOWER Automotive power device
Supports load-compatibility, wiring harness optimization, fault condition impact and diagnostic analysis
Supports various PCB configurations

TVS Simulator

Specify system ratings and surge waveform
Search and sort suitable devices


Build simple schematics and firmware inputs in minutes
Quickly generate reliable estimates of:
Battery life
System power consumption
Bill of materials costs
Choose design tool:

Active Filters

Handles multi-stage-designs and common topologies
Returns circuit component values
Provides gain, phase and group delay graphs
Low Pass, High Pass and Band Pass


Handles most common configurations
Returns circuit components values
Provides I/O signal waveforms
Inverting, Non Inverting, Window

Low side Current Sensing

Returns circuit component values
Provides current error graphs

High side Current Sensing

Provides current error graphs.
Help to select the right High side current sensing and shunt devices.
Choose design tool:

NFC Inductance

Input geometry and substrate properties
Get antenna impedance

UHF Link Budget

Enter forward and reverse link characteristics
The tool returns link budget estimate

NFC Tuning Circuit

Enter antenna parameter and matching target
Select the topology of the matching network
The tool returns component values for the desired design targets