Help ID a through-hole 6-pin IC

The ID marks are as follows:
M logo (maybe Motorola) followed by HEPC

I measured it to be 264 mils long x 226.5 mils wide x 119 mils thick.
On the right hand side there is a raised bar, similar to what you might see printed on a diode.


I am sorry to say that I am not able to verify that item or it’s specifications.