KSE45H11 vs D45H11

[akis]

Could someone please tell me the differences between the two transistors? D45H11 is made by multiple manufacturers, and the KSE45H11 is Fairchild only, but they also do the D45H11.

[Scrts]

Include both parts datasheets.

[LEDPaul]

Main difference is in package. Throughhole VS smd. Also abs max current is slightly different

[edavid]

Main difference is in package. Throughhole VS smd. Also abs max current is slightly different

That is incorrect.  They are both in TO-220 and have a 10A I_C rating.

https://www.fairchildsemi.com/datasheets/D4/D45H11.pdf
https://www.fairchildsemi.com/datasheets/KS/KSE45H.pdf

My theory is that Fairchild started selling parts with the D45H11 mark after they acquired GE/Harris/Intersil's discrete lines.

[LEDPaul]

I stand corrected. The KSE45H11 and D45H11 are indeed both TO220 and Ic=10A.
The KSH45H11 (and MJD45H11) comes in the TO251 and TO251 (IPAK and DPAK) and has max 8A collector current

[Kleinstein]

They are similar, but the D45H11 has a better specified SOA, especially at higher voltages. SO the KSE45 is more the switching type. 

[akis]

They are similar, but the D45H11 has a better specified SOA, especially at higher voltages. SO the KSE45 is more the switching type.

Do not think so. The datasheet charts appear to be copies of each other. In the D44H11TU sheet it is mentioned the KSE45H as the complimentary, even!

I tend to think they are simply different factories or production lines or somesuch. I believe that the specs are perfectly equivalent. But if anyone knows how to contact Fairchild we would be able to solve this mystery.

[Pjotr]

D44xx and D45xx and variants are pretty common industry standard power transistors. Much like the 2N3055 was once a standard power horse. They come from various manufactures and plants, like the various 2N3055 variants did. How the thing in reality performs you know when you use them. But if you stay away from its boundaries it all doesn't matter much.