Hey.

The previous year opening and closing ranks for admission in NIT Trichy under the home state category for the SC category was a rank ( SC rank) of 4751 and  8397. As per the previous year trends for admission in NIT Trichy for the SC category, you would require a rank around this for any chance for admission under the Home state quota You can use the link below to check out previous year cut offs for other NITs. And for NIT trichy. 

https://www.google.com/amp/s/engineering.careers360.com/articles/jee-main-cutoff/amp

https://engineering.careers360.com/articles/jee-main-cutoff-for-nit-trichy/amp

Best of luck