JAST Power’s JS-SSKH Series Thyristor Diode Modules combine the controllability of thyristors with the rectification capability of diodes in a single package, providing versatile solutions for semi-controlled power conversion applications.

Our JS-SSKH Series Thyristor Diode Modules offer the following features:

• Hybrid Design: Integrates thyristor and diode chips in one module, enabling semi-controlled rectification with reduced component count.
• Electrically Isolated Baseplate: Features ceramic substrate (Alumina DBC) providing excellent electrical insulation between chips and mounting base (typical isolation voltage 2500V to 4200V AC).
• Multiple Configurations: Available in various combinations including single thyristor-diode pairs, dual thyristor-diode arrangements, and three-phase semi-controlled bridge configurations.
• Wide Current and Voltage Range: Covers current ratings from 25A to 800A+ and voltage ratings from 800V to 2200V.
• Optimized for Semi-Controlled Applications: Ideal for applications requiring partial power control with natural freewheeling path.
• Excellent Thermal Management: Low thermal resistance design with efficient heat dissipation capability.
• Integrated Gate Protection: Built-in gate protection circuits for enhanced reliability.
• Standard Industrial Packages: Industry-standard footprints for easy system integration and maintenance.
• High Surge Current Capability: Robust design to withstand transient overcurrent conditions.

Configuration: Each module contains one thyristor and one diode in anti-parallel connection, creating a semi-controlled switch that allows:

• Controlled Turn-On: The thyristor provides gate-controlled switching for precise power control.
• Natural Freewheeling: The anti-parallel diode provides a natural current path during the negative half-cycle.
• Reduced Harmonics: The combination reduces harmonic content compared to fully-controlled solutions.
• Cost-Effective Control: Fewer gate drivers required compared to full thyristor bridges.

Applications: DC motor speed control, battery chargers, electroplating power supplies, and controlled heating systems.

Voltage Range: 800V to 1600V standard (higher voltages available on request).

Current Range: From 25A to 100A per device.

Configuration: These modules contain two thyristor-diode pairs, typically arranged for single-phase semi-controlled bridge applications:

• Single-Phase Bridge: Complete semi-controlled bridge in one module.
• Reduced Component Count: Integrates four power devices in one package.
• Optimized Layout: Internal connections minimize parasitic inductance.
• Simplified Assembly: Single module mounting reduces assembly time and improves reliability.

Applications: Industrial battery chargers, DC drives, controlled rectifiers for electrochemical processes, and welding power supplies.

Current Range: From 125A to 800A per device.

Special Features: Available with integrated snubber circuits and temperature sensors on request.