MCD700-18IO1W

Overview

The MCD700-18IO1W is a silicon thyristor/diode module manufactured by IXYS, designed for high-power applications. It features an 1800 V repetitive peak off-state voltage (VDRM) and a maximum average on-state current of 700 A at a water temperature of 42°C with a flow rate of 4 l/min. The device utilizes a WC-500 package with a water-cooled base and screw mount installation style. Key electrical characteristics include a peak non-repetitive surge current of 16.5 kA and an isolation voltage of 3500 V AC RMS. The operating junction temperature range spans from -40 to +125 °C.

Feature Summary

• Integrated thyristor and diode configuration within a single semiconductor module.
• Water-cooled base design utilizing the WC-500 package for efficient thermal management.
• High blocking voltage capability rated at 1800 V for robust operation in demanding circuits.
• Screw mount installation style ensuring secure mechanical attachment to heatsinks.

Applications

• Industrial motor drives
• High-voltage direct current (HVDC) transmission systems
• Static VAR compensators

Procurement Notes

Verify component authenticity through authorized IXYS distributors or certified secondary market suppliers. Request original datasheets and traceability documentation to confirm manufacturing origin. Inspect physical terminals for corrosion and ensure packaging integrity during transit. Confirm that the specific ordering code matches the required voltage and current ratings before finalizing acquisition.

Selection Notes

Evaluate thermal requirements against the specified water cooling parameters, including inlet temperature and flow rate limits. Ensure gate drive circuits can supply the necessary trigger current and voltage while respecting power dissipation constraints. Verify that system snubber networks are properly sized to protect against excessive dv/dt and di/dt stresses during switching transitions.

Part Context

This component belongs to the IXYS M##700 series of thyristor/diode modules, which are engineered for heavy-duty industrial power conversion. The series offers various voltage grades and configurations to suit different high-current applications. The MCD variant specifically integrates complementary devices for bridge rectifier or chopper circuit implementations.

Replacement Considerations

Direct cross-compatibility should be verified against other IXYS MCD700 series variants with matching voltage codes. Alternative manufacturers may offer similar high-current thyristor/diode modules, but pinout dimensions and thermal resistance values must be strictly compared. Consult manufacturer engineering support for detailed substitution analysis.

FAQ

What is the critical rate of rise of on-state current for this module?

The critical rate of rise of on-state current (di/dt)cr is 150 A/µs for repetitive conditions and 300 A/µs for non-repetitive conditions.

How does the device handle reverse recovery characteristics?

The integrated diode exhibits a typical total recovered charge (Qrr) of 2200 µC and a peak reverse recovery current (Irm) of 145 A under standard test conditions.

What is the recommended mounting force for the terminals?

The recommended mounting force for the terminals ranges from 10.2 Nm to 13.8 Nm, with lubricated screws required for proper installation.