mosfet datasheet missing specs

[LaserTazerPhaser]

Obtained a many of these https://lcsc.com/product-detail/MOSFET_Foshan-Blue-Rocket-Elec-BR13N50_C328554.html and datasheet is missing transient thermal impedance and safe operating area tables.

From the supplied data it be determined if it can handle a constant ~1amp @ ~175V without incurring damage?

[amspire]

Obtained a many of these https://lcsc.com/product-detail/MOSFET_Foshan-Blue-Rocket-Elec-BR13N50_C328554.html and datasheet is missing transient thermal impedance and safe operating area tables.

From the supplied data it be determined if it can handle a constant ~1amp @ ~175V without incurring damage?

If you can keep the case temperature at 25 degC, you can, but it still would be a bit close to the absolute maximum rating for comfort.

It is also not that easy keeping the case at 25 degC or lower. That is not the heatsink temperature - that is the case temperature and so you would need a heatsink that was well below 25 degC while dissipating 175W. Depending on the heatsink design, it could mean keeping the heatsink average temperature below 15 DegC.

Richard

[LaserTazerPhaser]

Obtained a many of these https://lcsc.com/product-detail/MOSFET_Foshan-Blue-Rocket-Elec-BR13N50_C328554.html and datasheet is missing transient thermal impedance and safe operating area tables.

From the supplied data it be determined if it can handle a constant ~1amp @ ~175V without incurring damage?

If you can keep the case temperature at 25 degC, you can, but it still would be a bit close to the absolute maximum rating for comfort.

It is also not that easy keeping the case at 25 degC or lower. That is not the heatsink temperature - that is the case temperature and so you would need a heatsink that was well below 25 degC while dissipating 175W. Depending on the heatsink design, it could mean keeping the heatsink average temperature below 15 DegC.

Richard

The question really was whether the safe operating area would permit ~1A @ ~175V.

Going to gang at least 3 of these.

[amspire]

The question really was whether the safe operating area would permit ~1A @ ~175V.

Going to gang at least 3 of these.

If you look at 13N50 mosfets from other manufacturers, the rating is for about 400mA at 175V at 25degC. So three in parallel would be right on the limit.

If the mosfets could be in series with 60V across each, there would be no problem at 2A.

[David Hess]

If you can keep the case temperature at 25 degC, you can, but it still would be a bit close to the absolute maximum rating for comfort.

Power MOSFETs can suffer from thermal instability at high drain voltage because the temperature coefficient of the current versus gate voltage reverses.  This limits SOA (safe operating area) in the same way that secondary breakdown in bipolar transistors does.

Just because the power MOSFET datasheet does not show the thermal instability line in the SOA graph does not mean that it has a square SOA.  On the contrary, it usually means that the SOA at high drain voltage is horribly bad and the MOSFET is only intended for switching applications.

For the highest performance switching power MOSFETs, the start of the thermal instability region is no better and may be worse than a comparable bipolar transistor.