776273-1/7148C1-1.3-21 Female 14-PinWaterproof Housing Ecu Connector Car Terminal Wire Connectors

1. Product Type Features

This is a professional heavy-duty automotive waterproof ECU wire-to-board connector with TE internal part number 776273-1. The official TE internal description is 14POS, AMPSEAL, SOC HSG ASSY, SLD, COD 1. Designed specifically for vehicle ECU units, engine control systems, and high-power automotive electronic modules, this unit is a sealed, high-reliability female terminal housing connector. The overall shape is rectangular with full sealable waterproof construction, delivering excellent dustproof, waterproof, and anti-corrosion performance. It adopts a standard housing for female terminals and features integrated primary locking inside the housing body. The connector system is wire-to-board, suitable for stable connection between wiring harness and vehicle control circuit boards. It is a perfect direct replacement for original AMPSEAL series automotive waterproof connectors for heavy-duty and commercial vehicle applications.

2. Configuration Features

This connector comes with a total of 14 positions arranged in 3 standard rows with uniform and precise internal cavity layout. The centerline pitch and row-to-row spacing are both 4 mm, ensuring standardized modular assembly. Each channel works independently without signal interference or short-circuit risks. Built-in keyed mating alignment and terminal position assurance (TPA) structure effectively prevent mis-insertion, reverse assembly, and terminal displacement during mass harness production. The integrated locking mechanism simplifies assembly steps, improves production line efficiency, and guarantees long-term anti-loosening performance under severe vehicle vibration conditions. No hybrid mixed-function design, purely dedicated for stable power and signal wiring distribution.

3. Electrical Characteristics

Built for high-power automotive electrical systems, the nominal voltage architecture reaches up to 250V, with an operating voltage of 250 VAC. Each socket contact supports a maximum current rating up to 17A, providing strong, stable power transmission for automotive ECU, engine modules, and high-current body control circuits. The 1.3 mm mating pin diameter ensures low contact resistance, excellent conductivity, and stable electrical output. Optimized socket contact structure guarantees continuous and safe power delivery even under extreme temperature changes and long-term road vibration, avoiding circuit overheating, power drops, and electrical connection failures.

4. Body Features

The connector body is solid black in original industrial color, with smooth surface and high-precision injection molding without burrs or deformation. The cable exit angle is designed at 180 degrees for straight, tidy, and space-saving harness routing inside vehicle control boxes and engine bays. It features connector keying code 1 for accurate model matching and anti-misconnection. The overall body structure is rigid, impact-resistant, and mechanically strong, resisting harsh physical stress during vehicle assembly and long-term driving vibration. The compact rectangular overall size saves installation space while maintaining high mechanical durability and structural stability.

5. Contact Features

Equipped with high-performance socket-type contacts with a standard 1.3 mm contact size. The contacts are precisely manufactured to match 1.3 mm mating pin diameter perfectly, ensuring accurate insertion and stable clamping force. The contact material offers excellent electrical conductivity, oxidation resistance, and thermal stability, suitable for long-term high-current operation inside high-temperature engine environments. The socket design provides uniform elastic pressure, preventing poor contact, signal dropout, and terminal loosening caused by continuous vehicle vibration and temperature cycling.

6. Dimensions

Manufactured with high-precision automotive-grade molds to ensure strict dimensional consistency. The product height is 34.6 mm, product length is 35.4 mm, and product width is 33.6 mm. The centerline pitch and row-to-row spacing are uniformly controlled at 4 mm, fully matching industry-standard AMPSEAL series harness fixtures and assembly tooling. The rectangular overall structure ensures easy installation in limited ECU compartment spaces. All dimensions are fully interchangeable with original 776273-1 connectors, requiring no modification to existing wiring harness equipment.

7. Usage Conditions

This waterproof ECU connector supports an ultra-wide operating temperature range from -40°C to 125°C (-40°F to 257°F), fully adapting to freezing cold winter environments and extreme high-temperature heat radiation inside engine compartments in summer. With advanced IP6K7 and IP6K9K high-level waterproof and dustproof ratings, it resists heavy rain splashing, high-pressure water washing, mud, dust, and engine oil contamination. It can work stably in long-term outdoor, under-hood, and chassis harsh environments without aging, cracking, or performance degradation.

8. Summary of Key Attributes

14-pin rectangular female waterproof ECU automotive connector, model 776273-1 / 7148C1-1.3-21, AMPSEAL series compatible, 14 positions in 3 rows, fully sealable design, IP6K7 / IP6K9K waterproof grade, 250V high voltage resistance, 17A max current per pin, 1.3mm standard contacts, black glass-filled PBT housing, wide temperature range -40°C to 125°C, integrated locking and keyed alignment, wire-to-board cable mount free-hanging type, UL 94V-0 flame retardant, high vibration resistance, heavy-duty automotive power circuit dedicated connector.

9. Application Guidance

Mainly used for automotive ECU engine control units, vehicle body control modules, heavy-duty truck electrical systems, commercial vehicle power distribution units, engineering machinery electronic control systems, and high-current automotive internal power wiring harnesses. Ideal for OEM original vehicle assembly, engine wiring harness factories, heavy equipment modification workshops, auto electronic repair stations, and industrial vehicle electrical supporting projects. Perfect for all scenarios requiring high-power, waterproof, and high-reliability multi-core connection.

10. Installation Notes

Check all sealing rings and terminal completeness before assembly. Use keyed alignment points to ensure correct one-to-one directional insertion. Push firmly until the integrated locking mechanism clicks into place to confirm full locking. Avoid overloading beyond 17A maximum current per circuit to prevent overheating. Do not bend cables sharply near the connector root. Keep the housing away from strong chemical corrosion. After installation, test waterproof performance and pulling force to ensure safe and stable long-term operation.

11. Compliance and Standards

The housing adopts high-strength glass-filled PBT engineering material, meeting automotive industrial material standards. It passes UL 94V-0 flame retardant testing for high fire safety performance. Waterproof performance meets IP6K7 and IP6K9K international protection standards. All electrical and mechanical properties comply with automotive OEM technical specifications. All products are packed in moisture-proof, shockproof export cartons, suitable for international cross-border transportation and large-scale industrial warehouse storage.