The Texas Instruments INA117BM-3 is a differential operational amplifier — the kind you reach for when you need to extract a small signal riding on a large common-mode voltage, typical in data acquisition front-ends. It comes in a TO-99-8 metal can, a hermetic through-hole package that tells you this part was designed for environments where a plastic SOIC won't cut it: think industrial control panels, avionics instrumentation, or test equipment that sees temperature swings and vibration. The metal can also makes it a familiar sight on older boards that a repair tech might be trying to bring back — the scorch mark on the can often tells you which part actually died.
Through-hole mounting in a TO-99-8 metal can. The 8-lead circular package with a metal lid is soldered into a PCB with an 8-pin socket or direct solder holes.
Lifecycle — still a current part
RoHS non-compliant, so if your assembly line is RoHS-only, you'll need to verify the exemption or look at a lead-free alternative — but for high-reliability or military-contract work where tin-lead solder is still specified, that's exactly what you want.