Bosch 1928405521 2-Way Female Sealed Kompakt 4 Connector

The Component: Genuine Bosch high-performance sealed female socket connector plug housing. Kompakt 4 (Compact 4) Series taxonomy / 2-position single-row linear female casing / Code 1 Keying Profile (Solid Black / PA66 GF / Sealed / 1x2 Grid Configuration / Female Inline Interface Plug / Component Alias Code: 1928405521 / Global Order Reference: 1-928-405-521).

Applications & Fitment: Engineered as a heavy-duty, factory original equipment (OE) wire-to-device waterproof connection plug designed to meet the rigorous physical and environmental demands of modern automotive, commercial vehicle, and industrial engine wiring. This 2-pin female socket block is a massive powertrain harness staple across European and global vehicle manufacturing frameworks—frequently specified for critical engine management and chassis control loops. It is heavily integrated within heavy-duty diesel injection architectures, transmission control assemblies, industrial hydraulic pressure valves, and robust fluid temperature sensor networks. It features an integrated red Connector Position Assurance (CPA) locking mechanism that physically blocks the primary thumb-release lever from accidental unlatching due to high-frequency engine vibration or harmonic chassis buffeting. Built to deliver an absolute environmental seal, it effectively isolates electrical contacts from engine oil, salt-crusted winter road spray, and aggressive cleaning solvents. Highly vulnerable to mechanical CPA tab fracture or internal terminal latch track damage if field technicians attempt service extractions with un-profiled hand tools instead of clearing the safety slide.

Technical Attributes:

- Manufacturer Part Number: 1 928 405 521 / 1928405521 (Brand: Bosch / Robert Bosch GmbH Automotive Interconnect)

- Product Series Taxonomy: Kompakt 4 (Compact 4) Waterproof Automotive Family

- System Mechanical Keying: Code 1 Alignment Specification (Color-coded Solid Black Shroud)

- Configuration: 2-Position / 2-Way Female Socket Plug, Single-Row 1x2 Linear Layout

- Physical Dimensions: Profile measures 23.1mm Length by 22.4mm Width by 30.6mm Height

- Connector Style: Socket Housing for Female Contacts (Free-Hanging Inline or Device Header Plug)

- Fastening & Locking Architecture: Features a reinforced top mechanical latching arm backed by a high-visibility, sliding red mechanical CPA safety lock

- Secondary Locking System: Equipped with a pre-assembled, contrasting bright blue front-loading terminal position assurance (TPA) secondary lock retainer plate

- Mating Terminal Tab Envelope: Optimized to shield standard 2.8mm nominal tab width terminal styles

- Base Structural Compound: Premium Glass-Fiber Reinforced Polyamide (PA66 GF) engineering polymer for maximum thermal tracking resistance and impact toughness

- Environmental Sealing Level: High-performance waterproof and dustproof architecture utilizing an internal perimeter silicone matrix face seal and isolated single-wire entries

- Low-Voltage Circuit Threshold: Engineered for standard vehicle electrical networks operating below 42V DC continuous

- Continuous Current Threshold: Certified to pass continuous electrical current loads up to a maximum of 12.0 Amps depending on conductor gauge

- Operational Thermal Window: Severe-duty powertrain envelope certified to withstand continuous operating temperatures ranging from -40°C up to +150°C

- Target Female Terminal Contacts (Not Included): Precision optimized to accept standard Bosch BDK 2.8 series lance-locking female terminals (such as part number 1928498056 for 0.5–1.0mm² or 1928498057 for 1.5–2.5mm² wire ranges)

- Associated Single Wire Seals (Not Included): Requires individual VMQ silicone rubber cavity wire seals (such as white 1928300600 or blue 1928300599). Empty cavities must be blanked using dummy plug 1928300601.

- Commercial Access: Available as loose individual housing pieces, or comprehensive trade repair pigtail kits. Tiered B2B wholesale trade volume pricing breaks apply instantly inside your basket for independent garages, loom remanufacturers, and trade auto-electrical stockists.