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STW3N170 - DC SOA

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Magnethicc
Associate

‎2025-10-19 2:03 AM

Hi ST,

I am using the STW3N170 in a linear application (constant current source) where the voltage can be 1500V and current as high as 16mA - total 24W.

Can you please share the DC Curve of the SOA, please include in the graph the Thermal Instability due to secondary breakdown of the MOSFET.

 

Best Regards.

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Peter BENSCH
ST Employee

‎2025-10-19 8:04 AM - edited ‎2025-10-30 5:40 AM

Welcome @Magnethicc, to the community!

Transistors based on planar technology are primarily suitable for applications with linear control such as yours. However, the STW3N170 is manufactured using MESH technology, which, due to its structure, is targeted for switching applications. If this transistor is nevertheless operated in the linear region, there is a significant risk of hotspots forming in the MESH structure, which will lead to avalanche-like destruction of the transistor.

For further and more detailed questions, I recommend contacting the FAE of the local distributor or sales office.

Good luck!

Regards
/Peter

In order to give better visibility on the answered topics, please click on Accept as Solution on the reply which solved your issue or answered your question.

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Peter BENSCH
ST Employee

‎2025-10-19 8:04 AM - edited ‎2025-10-30 5:40 AM

Welcome @Magnethicc, to the community!

Transistors based on planar technology are primarily suitable for applications with linear control such as yours. However, the STW3N170 is manufactured using MESH technology, which, due to its structure, is targeted for switching applications. If this transistor is nevertheless operated in the linear region, there is a significant risk of hotspots forming in the MESH structure, which will lead to avalanche-like destruction of the transistor.

For further and more detailed questions, I recommend contacting the FAE of the local distributor or sales office.

Good luck!

Regards
/Peter

In order to give better visibility on the answered topics, please click on Accept as Solution on the reply which solved your issue or answered your question.
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