This part is a kind of semiconductor called A1150.

Function of this product has Two Wire Hall-Effect Switches.

Manufacturers : Allegro MicroSystems

Image and pinout :

Some of the text within the PDF file :

A1150, A1152, A1153, A1155, A1156, A1157, and A1158 Chopper-Stabilized, Two-Wire Hall-Effect Switches FEATURES AND BENEFITS • AEC-Q100 automotive qualified • High-speed, 4-phase chopper stabilization • Low switchpoint drift throughout temperature range • Low sensitivity to thermal and mechanical stresses • On-chip protection □□Supply transient protection □□Reverse-battery protection □□On-board voltage regulator □□3 to 24 V operation • Solid-state reliability • Robust EMC and ESD performance • Industry-leading ISO 7637-2 performance through use of proprietary, 40 V clamping structures Continued on the next page… Packages 3-pin SOT23-W 2 mm × 3 mm × 1 mm (suffix LH) 3-pin ultramini SIP 1.5 mm × 4 mm × 3 mm (suffix UA) 2-pin ultramini SIP 1.5 [ ... ]

A1150 PDF Datasheet Download