RH7066A-3.5-21/1-928-403-740/936394-2 12 V, 6 Position, Automotive Housing for Female Terminals

Detailed Product Description

The RH7066A-3.5-21/1-928-403-740/936394-2 is a high-current, fully sealable 6-position automotive housing connector engineered for 12V wire-to-wire power applications. This rectangular connector features a unique single-row (1-row) configuration with 6 positions, specifically designed for 2.8mm female receptacle terminals with an impressive 26A maximum current rating per contact. Featuring a black PA 66 GF15 (15% glass fiber reinforced) housing, locking lance primary locking feature, polarization mating alignment, and a long, narrow form factor with dimensions of 46.8mm in length and 30.5mm in width, this fully sealable connector delivers robust, environmentally protected power transmission in demanding automotive, commercial vehicle, and industrial applications across an extreme temperature range of -40°C to 130°C.

Product Type Features – Fully Sealable Design

This connector features a rectangular shape, providing efficient space utilization. It is a non-mixed, non-hybrid connector, meaning all 6 positions accept identical 2.8mm female receptacle terminals, simplifying inventory management. As a housing for female terminals, it is designed to mate with corresponding male terminal housings or headers.

The connector is fully sealable (Sealable: Yes) – this is a critical feature distinguishing this model from non-sealable alternatives. The sealable design provides:

Environmental protection – excellent resistance to moisture, water ingress, dust, salt spray, and other contaminants

Underhood and exterior suitability – can be used in engine compartments, underbody locations, and outdoor applications

IP rating capable – when properly assembled with sealed terminals or cavity plugs, can achieve significant ingress protection

Off-road and marine ready – suitable for agricultural, construction, and marine environments

The primary locking feature is Locking Lance – a flexible plastic beam molded into the housing that engages with the terminal to retain it. This proven retention mechanism is widely used in automotive power connectors. The connector system is wire-to-wire, making it ideal for harness-to-harness connections. The connector terminates to wire and cable.

Configuration Features – 6-Position Single-Row Design

The housing provides 6 positions arranged in 1 row. This single-row, 6-position configuration offers several advantages:

Easy terminal access – all 6 terminals are visible and accessible from one side

Simplified inspection – visual verification of terminal insertion and sealing is straightforward

Low profile – single-row design allows for efficient space utilization

Daisy-chain friendly – ideal for applications requiring multiple connections along a wiring run

Sealing-friendly – single-row design simplifies the sealing interface

Electrical Characteristics – 12V Dedicated System
This connector is rated for 12V nominal voltage architecture, making it specifically designed for:

12V systems – standard passenger cars, light-duty vehicles, and traditional automotive applications

The 12V dedicated design ensures optimal creepage, clearance, and insulation for this voltage level.

Body Features – Black Housing

The cable exit angle is 180° (straight) , facilitating straightforward cable management and minimizing bend stress on wires. The primary product color is Black, providing a professional appearance along with good UV resistance and thermal stability.

Contact Features – 2.8mm, 26A High Current

The housing accepts receptacle-type contacts (female terminals) with a contact size of 2.8mm. The mating tab width is precisely 2.8 mm (0.11 in) , a widely used standard in automotive power connectors.

The maximum contact current rating is 26A per contact – this high current rating enables the connector to handle demanding power applications including:

Lighting circuits (headlamps, fog lamps, work lights)

Electric motors (HVAC blowers, cooling fans, window lift motors, wiper motors)

Solenoids and relays

Power distribution junctions

Battery charging circuits

ECU power supply connections

The 26A rating provides excellent headroom for 12V automotive power distribution while maintaining compact dimensions.

Mechanical Attachment

Mating alignment is provided with a polarization alignment type. Polarization uses asymmetric geometric features to physically prevent incorrect mating or reverse insertion, ensuring proper orientation between the connector and its mating counterpart.

Terminal Position Assurance (TPA) is not provided (No) . Proper terminal insertion relies on the locking lance primary locking feature – installers should ensure terminals are fully seated until an audible click confirms engagement.

Strain relief is not provided (Without) – for high-vibration applications, external strain relief such as cable ties or conduit is recommended.

The connector mounting type is Cable Mount (Free-Hanging) , offering maximum flexibility for harness assembly without requiring panel or PCB mounting.

Housing Features – PA 66 GF15 Material

The housing is manufactured from PA 66 GF15 (Polyamide 66 with 15% Glass Fiber reinforcement) . This advanced material offers significant advantages over unfilled or lower-reinforcement materials:

Benefits of 15% glass fiber reinforcement:

Increased mechanical strength – 15% GF provides higher tensile and flexural strength than unfilled PA66

Enhanced dimensional stability – glass fibers reduce warpage and shrinkage during molding, critical for sealable connector geometries

Improved heat resistance – maintains dimensional stability at 130°C maximum operating temperature

Better creep resistance – maintains terminal retention force and sealing compression over time

Higher stiffness – resists deformation under terminal insertion forces and mating cycles

Good chemical resistance – withstands automotive fluids including engine oil, fuel, and coolant

The 15% glass fiber content provides a balanced trade-off – more reinforcement than unfilled PA66 for better mechanical properties, but less than 30-33% GF for better surface finish and reduced tool wear.

The centerline (pitch) between adjacent contacts is 5 mm (0.197 in) . This 5mm pitch provides:

Adequate electrical spacing – sufficient creepage and clearance for 12V systems

Sealing compatibility – 5mm pitch allows for effective wire and cavity sealing

Industry standard – common pitch for automotive power connectors

Accommodates appropriate wire gauges – suitable for wires used with 26A current (typically 12-14 AWG)

Dimensions – Long, Narrow Sealable Form Factor

Connector Height: 21.5 mm (0.85 in)

Product Length: 46.8 mm (1.84 in) – long dimension along the single row of 6 contacts

Product Width: 30.5 mm (1.2 in)

The RH7066A-3.5 features a distinctive long, narrow form factor optimized for sealable applications:

Length of 46.8mm (approximately 1.84 inches) – accommodates 6 contacts in a single row with sealing interfaces

Width of 30.5mm (approximately 1.2 inches) – provides space for sealing features and locking lance mechanisms

Height of 21.5mm (approximately 0.85 inches) – moderate profile with sufficient wall thickness for sealable construction

The 46.8mm length makes this connector well-suited for applications requiring multiple sealed connections along a harness run. The 30.5mm width provides enough space for robust sealing features while maintaining a manageable footprint. The 21.5mm height balances low-profile requirements with the need for proper sealing wall thickness.

Sealable Construction – Key Features

As a fully sealable (Sealable: Yes) connector, the RH7066A-3.5 incorporates specific design elements for environmental protection:

Wire seals – integrated or separate seals around each wire entry point

Cavity plugs – for unused positions to maintain seal integrity

Interface seal – between mating connector halves

Seal retention features – to keep seals in place during assembly and use

To maintain sealable performance:

All 6 positions must be occupied by either a terminated wire with proper wire seal, or a cavity plug

Mating connector must also be sealable

Proper assembly techniques are required to avoid seal damage