Probably not, they are designed for optimized power and working with laptop like platform such as micro form factor to save power.  Those processors are working with CPU sockets that compatible with 25w - 35w TDP. 

Besides support Xeon processors, here is the list of tested and validated Intel Core processors to work with your Precision 3630  https://www.dell.com/support/manuals/en-us/precision-3630-workstation/prec_3630_specifications_manual/processor?guid=guid-17014aff-dc79-4209-89da-b82b62be2c0f&lang=en-us

I think it will work because user have validated the regular i7 9700 and i9 9900 in this model.  the T version cpu are of same family just lower TDP which does not prevent them from running in this model

https://www.userbenchmark.com/UserRun/59471780

https://www.userbenchmark.com/UserRun/65777483

Thanks for replies.  I know its not listed as an officially supported CPU just hoping to find someone who has tried it as I couldn't find anyone who has been successful or unsuccessful. If I decide to test it out I'll let you know. 

no worries. someone had tested i7-8700T in this model although the low power 8700T is also not officially supported.  

Dell Precision 3630 Tower Performance Results - UserBenchmark

Interesting.   What is the difference between Dell 0NNNCT and 0Y2K8N ?    Both appear to be T3630 motherboards 

Dell oem motherboard almost always has more than one DP/N.  by default they do not release engineering details.  the second DP/N is a refresh

Even Ai in search saying that this PC support up to 9900k CPU it is not true! ( not first time with Ai)  Dell 3630 using motherboard IPCFL-TB/R and that one does not support 9000 CPU ! I tried 9500 and 9700 and 9600k and PC will not turn on!  THis motherboard is designed  for 8000 cpu only and will support anything up to 8700k without problem. I tried to update bios of course to newest but still none of 9000 CPU worked - PC will not turn on - you will not get bios screen.  That is the flaw in that motherboard. If you need 9000 CPU dell system , take 7070Mt or 7070sff and avoid Dell3630 !