RH71516Y-1.8-6.3-11/368301-1 12 V, 15 Position, Automotive Cap, Wire-to-Wire, 8.6 mm [.338 in] Centerline, Black, Wire & Cable, Power

Product Overview

The RH71516Y-1.8-6.3-11/368301-1 is a robust 15-position automotive cap (male connector housing) designed for wire-to-wire power distribution systems in 12V nominal voltage architectures. As a complementary component to female housings such as the RH71516Y series, this cap provides the male interface with tab-type contacts, enabling reliable and high-current connections in demanding automotive environments. Rated for an impressive 220A continuous current, this connector is engineered for high-power circuits that exceed the capabilities of standard signal connectors. The housing is manufactured from high-quality PBT (Polybutylene Terephthalate) thermoplastic, offering exceptional mechanical strength, thermal stability, and chemical resistance across a wide operating temperature range of -40°C to 105°C.

Design and Construction

The connector features a rectangular shape with a professional black finish that provides UV resistance and heat absorption management. As a cap-type housing, it serves as the male half of a wire-to-wire connection system, designed to mate directly with a corresponding female housing containing receptacle terminals. The wire-to-wire configuration eliminates the need for intermediate printed circuit boards or junction boxes, simplifying the vehicle's electrical architecture and reducing potential failure points.

With 15 positions arranged in 5 rows, this cap offers high-density power interconnection while maintaining a compact and manageable footprint. The centerline (pitch) between adjacent contacts is 8.6 mm (0.338 in), which is wider than typical signal connectors, reflecting its power-oriented design and the need for adequate creepage and clearance distances for high-current applications. The row-to-row spacing is 11.8 mm (0.46 in), providing generous separation between rows to prevent electrical arcing and heat buildup.

Electrical Performance

The most notable feature of this connector is its extraordinary current rating of 220A. This makes it suitable for the most demanding power applications within a vehicle, including:
Main battery cable connections
Alternator output circuits
Starter motor feeds
Power distribution unit (PDU) inputs
Electric vehicle (EV) and hybrid vehicle high-current pathways
Electric power steering (EPS) systems
HVAC blower motor main feeds
Fusebox and relay panel inputs

The nominal voltage architecture is 12V, making this connector compatible with standard automotive electrical systems, including conventional internal combustion engine vehicles, mild hybrids, and 12V auxiliary systems in electric vehicles. The connector is specifically designated for circuit application: Power, confirming that it is engineered and validated for high-energy electrical pathways rather than low-energy signal transmission.

Contact System

The contact type is tab (male pin), designed to mate with receptacle (female) terminals in the corresponding housing. The connector accommodates two distinct contact sizes: 1.8 mm (0.071 in) and 6.3 mm (0.25 in) mating tab widths. This dual-size capability is critical for power connectors, allowing the same housing to support:
1.8 mm tabs: Suitable for moderate-current circuits (e.g., 15-30A range), such as lighting circuits, solenoid controls, and module power feeds.
6.3 mm tabs: Suitable for high-current circuits (e.g., 30-220A range, depending on terminal design and wire gauge), such as battery cables, alternator outputs, and starter circuits.
The mixed and hybrid connector feature indicates that the housing can simultaneously accommodate both terminal sizes, providing design flexibility for harness engineers who need to combine multiple power circuits of varying current requirements within a single connector interface.

Material and Environmental Performance

The housing material is PBT (Polybutylene Terephthalate), a thermoplastic polyester widely used in automotive connector applications. PBT offers:
High heat deflection temperature: Typically exceeding 200°C, ensuring dimensional stability even in under-hood environments.
Excellent chemical resistance: Resists degradation from gasoline, diesel, engine oil, transmission fluid, brake fluid, coolant, and road salts.
Low moisture absorption: Maintains electrical insulation properties and dimensional accuracy in humid conditions.
Good flame retardance: Self-extinguishing properties enhance vehicle safety.
Dielectric strength: Provides robust insulation between adjacent high-current circuits.

Sealing and Environmental Protection

This cap is explicitly designated as non-sealable. Unlike sealed connectors that incorporate wire seals and cavity plugs, this connector is intended for use in interior or protected under-hood locations where direct water ingress is not a concern. The non-sealed design offers several advantages:
Lower cost: Eliminates the expense of silicone seals and cavity plugs.
Simpler assembly: No need to install wire seals or manage unused cavity sealing.
Smaller package size: Without seals, the connector can be more compact.
Lower insertion force: Easier to mate and unmated for service.
For applications requiring environmental protection, this cap should be used in conjunction with a sealed female housing or positioned within a protected enclosure.

Mating and Locking Features

The primary locking feature is located on the terminal, not on the housing itself. This means that the retention force between mated connector halves is primarily provided by the terminal locking lances or features within the female housing, rather than by an external connector position assurance (CPA) device or integrated housing latch. Terminal position assurance (TPA) is not included, so assemblers must ensure proper terminal insertion and locking during assembly.
The connector mounting type is cable mount (free-hanging), allowing it to be installed anywhere along a wire harness without requiring panel mounting or bracket support. The cable exit angle is 180°, providing straight-through cable routing that minimizes bending stress on wires and simplifies harness manufacturing.

Dimensions and Physical Characteristics

While specific overall dimensions are not provided in the parameter table, the key dimensional features include:
Centerline (pitch): 8.6 mm – Wide spacing suitable for high-current terminals and thick gauge wires.
Row-to-row spacing: 11.8 mm – Generous separation between rows to prevent heat concentration and electrical interference.
These dimensions accommodate large-gauge wires typically used in power circuits (e.g., 6 mm², 10 mm², 16 mm², 25 mm², or even larger for the 6.3 mm terminal positions). The connector shape is rectangular, providing natural polarization and easy identification of orientation during assembly.

Assembly and Handling Recommendations

When assembling this cap:
Terminal crimping: Use manufacturer-approved crimping tools to ensure proper wire-to-terminal attachment. High-current terminals require precise crimp height and width to minimize voltage drop and heat generation.
Terminal insertion: Insert terminals into the cap housing until an audible or tactile click confirms primary locking engagement. Since TPA is not provided, proper seating is critical.
Wire strain relief: This connector does not include integrated strain relief. For applications with vibration or cable movement, use external cable ties, heat shrink boots, or harness wrapping to secure wires.
Mating: Align the cap with the corresponding female housing using the polarization features (typically keyways or slots). Apply even pressure until fully seated.
Inspection: After mating, perform a pull test to verify locking engagement. For high-current applications, consider thermal imaging or voltage drop testing during validation.

Applications

Typical applications for the RH71516Y cap include:
Main battery positive and negative cables
Alternator to battery connections
Starter motor power feeds
Power distribution module inputs
Electric fan motor power circuits
Electric power steering (EPS) motor feeds
ABS pump motor power
HVAC blower motor main power
Trailer towing power circuits
Auxiliary battery connections (in dual-battery systems)
Electric vehicle (EV) DC-DC converter connections
Hybrid vehicle high-power junction box interfaces