The TMAG5124C1CEDBZRQ1 is a Texas Instruments automotive-grade Hall-effect unipolar switch in a SOT-23 surface-mount package. It operates as a 2-wire current-source output device, meaning the output current level signals the magnetic state rather than a voltage rail — this simplifies fault detection in harnesses where a short to ground or supply is a concern. The switch trips at 11 mT (south pole) and releases at 6.8 mT, with a supply voltage of 2.7 V. The output sources up to 5 mA, and the switching current is 18 mA — the 2-wire interface draws a low quiescent current in the off state and steps up when the field is present, so a single twisted pair carries both power and signal.
Temperature range and automotive qualification
The AEC-Q100 qualification (implied by the automotive designation) means it has passed the reliability stress tests for engine-bay deployment — thermal cycling, high-temperature operating life, and ESD robustness per the automotive IC standard.