Waterproof SP Series Circular Connectors for Maritime Applications

SD13/SP13 Circular Docking Connector

SP Series Connectors: Marine-Grade, Corrosion-Resistant Solutions for Maritime Applications

In the unforgiving maritime environment—where saltwater corrosion, constant vibration, extreme temperature fluctuations, and strict safety demands define daily operations—reliable connectivity is the lifeline of marine systems. Our full-range SP Series Connectors are engineered exclusively for marine use, delivering rugged waterproof performance and flexible configurations (including mainstream models like SP22/SP13/SP17/SP21/SP29 with multi-core options) to power critical systems on ships, offshore platforms, and all types of marine vessels.

Full Range of SP Series Models & Multi-Core Options

We offer a comprehensive lineup of SP Series connectors, covering diverse models with flexible core count selections to precisely match the needs of every maritime application scenario:

• SP13 Series: Ultra-compact design, ideal for confined spaces on ships; IP67 waterproof rating and 316L stainless steel shell for superior anti-salt spray corrosion.
• SP17 Series: IP68 high waterproof protection; 360° EMI/RFI shielding to avoid interference from marine radar/communication systems; stable performance in -40℃~+105℃.
• SP21 Series: Heavy-duty anti-vibration structure; enhanced corrosion resistance; supports high-density multi-channel transmission.
• SP23 Series: Balanced power & signal transmission; oil-resistant insulation material; suitable for engine room and on-board equipment cabinet wiring.
• SP29 Series: High current-carrying capacity (up to 15A per core); IP68 high-pressure wash resistance; ideal for large-scale marine equipment and offshore platform integration.

Why SP Series Connectors Are Trusted for Maritime Use

1. Marine-Specific Durability & Corrosion Resistance

All SP Series models feature PC/PA66 shells, passing 1000+ hours of salt spray testing to effectively resist saltwater erosion, ocean humidity, and chemical corrosion. With IP68 multi-level protection, they shield against seawater intrusion, high-pressure deck washing, and dust accumulation in engine rooms—ensuring stable operation in the harshest marine environments.

2. Reliable Electrical Performance in Extreme Conditions

Designed to adapt to extreme maritime climates, SP Series connectors operate stably from -55℃ (arctic marine routes) to +125℃ (engine room high-temperature zones). They boast ≤15mΩ initial contact resistance and ≥100MΩ insulation resistance, paired with 1500~3000V AC test voltage, guaranteeing zero signal/power loss for critical navigation and control systems.

3. Flexible, Marine-Tailored Design

With 2-32 core options covering everything from small-signal sensors to high-density multi-channel systems, SP Series connectors match diverse maritime device interfaces. They support crimp, weld, and screw termination methods, paired with anti-loosening threaded locking structures to prevent accidental disconnections caused by ship vibration or wave impact—enabling fast and secure on-site assembly.

Key Maritime Applications

• Navigation & Communication Systems: GPS navigation equipment, marine radar, satellite communication links, VHF radio connections.
• Engine Room & Propulsion Systems: Main engine control units, fuel system sensors, cooling system monitors, propulsion system signal transmission.
• Deck & Offshore Equipment: Crane control circuits, winch systems, offshore platform monitoring sensors, deck lighting and power connections.
• Passenger & Crew Areas: Emergency lighting control, fire alarm sensor links, on-board HVAC systems, entertainment equipment wiring.

Selection Considerations for Your Marine Project

When choosing an SP Series connector, verify the core count, current rating, and IP protection level against your specific application. Confirm the operating temperature range matches your installation environment—whether that is an exposed deck, engine room, or below-deck equipment cabinet. Also check the termination method (crimp, weld, or screw) against your on-site assembly capabilities and maintenance procedures.

Trust SP Series for Your Maritime Projects

Every SP Series maritime connector undergoes rigorous pre-shipment testing, including salt spray, vibration, high-temperature, and waterproof validation, ensuring long-term reliability in the harshest marine environments. We offer custom core count and cable length solutions to meet specialized project requirements and dedicated maritime technical support.

Contact our team today to request a custom quote, sample, or technical datasheet, and equip your marine vessels with connectors built for the unique challenges of the sea. For related options, explore the 12G Series Circular Connectors or review the SD13/SP13 Circular Docking Connector for additional marine-grade solutions.