IXYS VHF36-12io5 | Robust Phase Control Thyristor/Diode Module with Isolated Baseplate
Product Overview
The IXYS VHF36-12io5 is a high-reliability phase control module, integrating thyristors and diodes in a single, rugged package. Rated for 1200V and an average forward current of 36A, this component is engineered for demanding industrial power control systems. Its primary function is to provide precise and efficient AC-to-DC rectification and AC voltage control. The VHF36-12io5 excels in applications such as DC motor drives, AC motor soft starters, and industrial heating or lighting control, where robust thermal performance and simplified assembly are critical design considerations.
Core Product Features In-Depth
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Direct Copper Bonded (DCB) Isolated Baseplate
Technical Principle: The VHF36-12io5 utilizes a Direct Copper Bonded (DCB) substrate, where a ceramic (Al₂O₃) layer is bonded directly between the power semiconductor chips and a copper baseplate. This structure provides outstanding electrical isolation (rated at 3000V~) while maintaining exceptionally low thermal resistance.
Application Value: This integrated isolation eliminates the need for external insulating pads (e.g., mica or silicone) and messy thermal grease during assembly. For system builders, this means a faster, more cost-effective, and highly repeatable manufacturing process. The superior heat transfer path allows the module to run cooler, significantly improving the system's long-term reliability and enabling more compact heatsink designs or higher power density.
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Planar Passivated Chips for Enhanced Stability
Technical Principle: The silicon thyristor and diode chips within the IXYS VHF36-12io5 are manufactured with a planar passivation process. This involves creating a stable, non-conductive layer (typically silicon dioxide) over the sensitive junction areas of the chip.
Application Value: This protective layer seals the semiconductor junctions from environmental contaminants and mobile ionic charges, ensuring extremely low leakage currents and stable blocking voltage characteristics over the component's entire operational life and temperature range. For applications like uninterruptible power supplies (UPS) or critical process controllers, this translates directly to higher system reliability and reduced maintenance needs.
Typical Application Scenarios & Value Proposition
- AC Motor Soft Starters: In this application, the VHF36-12io5 gradually increases the voltage supplied to a motor by controlling the thyristor firing angle. Its robust thermal design effectively dissipates the heat generated during the start-up ramp, preventing large inrush currents that can cause mechanical shock and electrical grid disturbances.
- Variable Speed DC Motor Drives: When used in a controlled bridge rectifier circuit, this module efficiently converts fixed AC line voltage into a variable DC voltage to precisely control a DC motor's speed and torque. The low forward voltage drop of the internal diodes and thyristors minimizes conduction losses, directly improving the drive's overall energy efficiency.
- Industrial Heating & Light Dimming: The VHF36-12io5 provides smooth, precise phase-angle control for regulating power to resistive loads like industrial furnaces or large-scale professional lighting rigs. The electrically isolated package simplifies mounting within crowded control panels, reducing assembly complexity and potential points of failure.
- Battery Charging Systems: As the core of a controlled rectifier, this module delivers the stable and regulated current needed for charging large industrial battery banks. Its high reliability, stemming from the passivated chip technology, ensures consistent charging performance, which is vital for maximizing battery health and lifespan. For a wider selection, you can view more power modules in our portfolio.
Key Technical Parameters
| Parameter | Value |
|---|---|
| Repetitive Peak Off-State Voltage (VDRM/VRRM) | 1200 V |
| Average On-State Current (ITAVM, TC=85°C) | 36 A |
| RMS On-State Current (ITRMS) | 57 A |
| Isolation Voltage (VISOL, 50/60Hz) | 3000 V~ |
| Package Type | TO-240AA |
For a complete list of specifications, download the datasheet here: VHF36-12io5 Datasheet
Product Comparison & Selection Advice
VHF36-12io5 vs. Discrete Thyristors/Diodes: While using individual discrete components may seem cost-effective initially, the IXYS VHF36-12io5 module offers a significantly lower total cost of ownership. It eliminates the need to source, stock, and assemble multiple components, along with their required isolation hardware. The pre-engineered module ensures optimized thermal performance and higher reliability, making it the superior choice for commercial and industrial equipment where manufacturing efficiency and long-term durability are paramount.
Thyristor Module vs. IGBT Module: It is crucial to select the right technology for your application. The VHF36-12io5 is a thyristor-based module, ideal for low-frequency (line frequency, 50/60 Hz) phase control and rectification. In contrast, an IGBT module is a high-frequency switch designed for applications like inverters and switch-mode power supplies. For direct control of AC power or creating a line-frequency rectifier, the VHF36-12io5 is the correct choice. For high-frequency power conversion, an IGBT module would be required. For assistance with your specific design, please contact us for a quote and technical support.