The 1-2112890-4 is a 25-position mixed tab housing featuring mechanical coding 'D'. It is constructed from yellow PBT-GF30 for durability and includes a distinct yellow-green secondary locking feature made of PBT-GF10 to ensure secure contact retention. The housing accommodates a mix of contacts, with cavities designed for both 2.8 x 0.8 mm tabs (supporting up to 2.5mm² wire) and 1.6 x 0.6 mm tabs (supporting up to 1.5mm² wire). This component is designed to fit TE carrier receptacle inserts and mates with receptacle housing 1718484, making it suitable for various automotive wiring applications.