What this sensor is and where it fits
The Texas Instruments TMCS1108A3UQDR is a unidirectional Hall-effect current sensor that outputs a ratiometric voltage proportional to the sensed AC or DC current. It delivers a sensitivity of 200 mV/A, meaning every amp through the primary conductor produces 200 mV at the output pin, referenced to the supply. The 80 kHz bandwidth and 6.5 µs response time make it fast enough for switching power-supply loops and motor-phase monitoring, but not for sub-microsecond fault capture. The 8-SOIC package is a standard surface-mount footprint, easy to place on a production board or swap in the field with basic rework gear.
Temperature range and environment
Rated for -40°C to 125°C ambient, this sensor handles industrial enclosures, outdoor telecom cabinets, and under-hood automotive environments without a separate high-temp derivative. The ±0.5% linearity holds across that span, so you are not re-calibrating for seasonal temperature swings.
Sourcing and lifecycle
No end-of-life notice or last-time-buy schedule is in effect. There is no official second source listed, but the Hall-effect current-sensor market has several pin-compatible alternatives if dual-sourcing becomes a priority.