The 1801178-3 is a 3-position receptacle housing designed for automotive wire-to-wire sensor flat contact systems with a sealable, keyed configuration. It features 1.5 mm receptacle contacts rated for 16 A maximum current at 16 VDC operating voltage, with a 3.33 mm centerline pitch and rectangular connector shape. The housing is constructed from PBT GF (polybutylene terephthalate glass-filled) material in gray, with terminal position assurance and cable mount (free-hanging) configuration. It operates across a wide temperature range of -40 °C to +150 °C and achieves IP69K sealing rating with UL 94HB flammability compliance. This connector is commonly used in automotive power distribution and sensor applications requiring robust sealing and reliable contact retention in harsh environments.