MCBHRA8M Micro Circular Right Angle Connector — 8-Contact Male, 300V, 1,400 Bar

MCBHRA8M Micro Circular Right Angle Connector — Overview

The MCBHRA8M is a 8-contact Micro Circular Right Angle Bulkhead Male subsea connector with a 90-degree cable exit — designed for panel-mount installations where axial cable routing is restricted by housing geometry, adjacent components, or bend radius requirements. Rated to 300V / 5A per contact and 1,400 Bar design depth, it provides the same electrical and pressure performance as the standard Micro Circular bulkhead series with a right-angle profile that reduces the installation envelope depth behind the panel.

Key Design Features

• 90-degree right angle cable exit — reduces installation depth behind the panel face; ideal for housings with restricted internal clearance
• 8-contact Micro Circular Bulkhead Male — same mating interface as standard MCBH8 series, fully cross-compatible
• 300V / 5A per contact — suitable for combined power and signal circuits in compact instrument systems
• 1,400 Bar design depth (mated) — qualified to full ocean depth hydrostatic pressure
• 800 Bar open-face pressure rating — unmated face withstands 800 Bar / 11,600 psi
• 500+ wet mating cycles — repeated in-situ connection and disconnection in seawater without degradation
• Gold-plated copper alloy contacts — contact resistance < 10 mΩ, corrosion-immune in saltwater
• Chloroprene rubber body — chemically resistant, thermally stable from -40°C to +60°C

Electrical & Mechanical Specifications

Typical Applications

• AUV and micro-ROV housings with restricted internal cable routing space behind the panel
• Compact instrument pressure housings where axial cable exit from a 8-contact bulkhead would violate bend radius requirements
• Subsea junction boxes with tight internal wiring layouts requiring 90-degree cable turns at the panel
• Underwater camera and lighting housings with shallow internal depth
• Oceanographic instrument pods with side-exit cable routing requirements
• Compact sensor housings mounted in confined spaces on ROV frames

Why Choose the MCBHRA8M Over Generic Compact Underwater Connectors

1. Compact Form Factor — Purpose-Built for Miniaturised Instruments

The MCBHRA8M is specifically engineered for the reduced envelope requirements of modern AUV payloads, micro-ROV chassis, compact sensor housings, and space-constrained instrument frames — without sacrificing depth rating, cycle life, or electrical performance.

2. Gold-Plated Contacts — Corrosion-Free at Full Ocean Salinity

Gold-plated copper alloy contacts maintain contact resistance below 10 mΩ throughout the connector's service life, immune to chloride-induced corrosion even after extended seabed deployments. Tin or nickel contacts corrode within weeks in saltwater; gold does not.

3. 1,400 Bar Design Depth — Massive Pressure Safety Margin

Qualified to 1,400 Bar (20,300 psi) when mated — far exceeding the depth requirements of virtually all commercial and research subsea deployments. This margin ensures seals never operate near their failure point across variable-depth profiles and thermal cycles.

4. 500+ Wet Mating Cycles — Field-Proven Reliability

Qualified for more than 500 wet mate/demate cycles in seawater — essential for ROV tooling, instrument servicing, and observatory maintenance where connectors must be connected and disconnected repeatedly in the field.

5. Multiple Body Materials Including Titanium and PEEK

Available in brass, stainless steel, titanium, anodised aluminium, and PEEK, allowing system designers to optimise for weight (titanium, aluminium), chemical resistance (PEEK), or cost (brass) depending on mission requirements.

Installation, Mating, and Maintenance Guidelines

Pre-Mating Inspection

• Inspect both connector faces before every mating cycle — remove debris, biofouling, and salt crystal deposits from contact faces and locking surfaces.
• Check the chloroprene body and O-ring surfaces for cuts, compression set, or delamination. Replace immediately if damage is found.
• Verify contacts are fully seated and free of corrosion or bent pins before mating.

Mating Procedure

• Align the keying feature precisely before applying axial load — misalignment is the primary cause of contact damage in compact circular connectors.
• Apply steady axial pressure until the locking sleeve fully engages. Never force a partially engaged connector.
• For underwater mating: mate slowly to prevent hydraulic pressure spikes across the contact face.

Post-Recovery Maintenance

• Flush connector faces with fresh water immediately after recovery — chloride deposits accelerate oxidation if left to dry.
• Apply dielectric grease to contact faces and O-ring surfaces before extended storage unmated.
• Inspect contacts and body integrity after every 50 mate/demate cycles or 12 months, whichever occurs first.