2N7639-GA

Overview

The 2N7639-GA is a normally-off Silicon Carbide Junction Transistor manufactured by GeneSiC Semiconductor. It features a TO-257 isolated base-plate hermetic package and supports a maximum operating temperature of 250 °C. Key electrical parameters include a 600 V drain-source voltage, 20 A continuous drain current at case temperatures between 145 °C and 160 °C, and a typical on-resistance of 65 mΩ at 25 °C. The device exhibits low gate charge, temperature-independent switching performance, and high short-circuit withstand capability.

Feature Summary

• Electrically isolated base-plate for secure mounting
• Positive temperature coefficient facilitating easy paralleling
• Temperature independent switching performance
• Suitable for connecting an anti-parallel diode

Applications

• Down Hole Oil Drilling
• Geothermal Instrumentation
• Hybrid Electric Vehicles (HEV)
• Solar Inverters
• Switched-Mode Power Supply (SMPS)

Procurement Notes

Verify the specific revision status of the datasheet before procurement, as the document indicates updates in late 2013. Confirm that the TO-257 hermetic package meets the thermal interface requirements for the target application. Ensure compatibility with recommended gate drive configurations, such as the IXYS IXDN614/IXDD614 drivers or dual voltage source setups, to optimize switching losses and ensure reliable operation within the specified temperature range.

Selection Notes

Select this component for applications requiring operation up to 250 °C junction temperature. The positive temperature coefficient simplifies parallel operation for higher current handling. Consider the 1.16 °C/W thermal resistance when designing heat sinks. Verify that the circuit topology supports the recommended gate drive voltages and currents to maintain the specified switching energy losses and safe operating area limits under hard-switching conditions.

Part Context

This part belongs to the GeneSiC Semiconductor SiC Junction Transistor (SJT) family. Unlike standard MOSFETs, the SJT technology offers a gate oxide-free design, contributing to its robustness and high-temperature stability. The TO-257 package provides a hermetic seal suitable for harsh environments, distinguishing it from plastic-packaged alternatives in the same voltage class.

Replacement Considerations

Direct pin-to-pin replacements are not explicitly listed in the provided documentation. When evaluating alternatives, match the 600 V rating, TO-257 package dimensions, and 250 °C thermal capability. Verify that substitute devices offer comparable on-resistance and switching characteristics to maintain system efficiency and thermal management designs.