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Osculati Surface Mount Watertight Circuit Breakers for Windlass & Bow Thruster (50–200A)
The Osculati Surface Mount Circuit Breaker range is designed to protect high-current marine electrical systems while providing convenient manual circuit isolation. Combining the functions of a resettable thermal circuit breaker and an ON/OFF switch, these units are ideal for electric windlasses, bow thrusters, and other demanding onboard DC applications.
Manufactured in the USA to SAE J1171 and CE28846 Vapor Proof standards, these marine circuit breakers are engineered for long-term reliability with approximately 3,000 operating cycles. Their surface-mount construction simplifies installation where recessed mounting is not practical, while oversized 5/16" terminals allow secure connection of heavy-duty marine cables.
The breakers are rated IP66 for water resistance and support electrical systems up to 48V DC. Models from 100A to 200A can also be used as general battery disconnect switches, making them suitable for a wide variety of marine electrical installations.
Key Features
- Marine thermal circuit breaker with integrated ON/OFF switch;
- Surface-mount installation;
- Resettable overload protection;
- Functions as both circuit breaker and disconnect switch;
- Heavy-duty 5/16" electrical terminals;
- IP66 waterproof construction;
- Manufactured to SAE J1171 and CE28846 Vapor Proof standards;
- Approximately 3,000 operating cycles;
- Maximum operating voltage: 48V DC;
- Operating temperature: -40°C to +85°C.
Available Versions
Osculati Code Current Rating Installation Application 02.711.50 50 A Surface Mount Windlass / Bow Thruster 02.711.10 70 A Surface Mount Windlass / Bow Thruster 02.711.20 100 A Surface Mount Windlass / Bow Thruster / Battery Disconnect 02.711.40 150 A Surface Mount Windlass / Bow Thruster / Battery Disconnect 02.711.41 200 A Surface Mount Windlass / Bow Thruster / Battery Disconnect
Technical Specifications
Protection Type Resettable Thermal Circuit Breaker Installation Surface Mount Electrical Terminals 5/16" Maximum Voltage 48V DC Interrupt Capacity 5000A @ 14VDC, 3000A @ 28VDC, 1500A @ 48VDC Protection Rating IP66 Operating Temperature -40°C to +85°C Standards SAE J1171, CE28846 Vapor Proof Operating Life Approx. 3,000 operating cycles Country of Manufacture USA
Applications
- Electric anchor windlasses;
- Bow thrusters;
- High-current DC marine electrical systems;
- Battery isolation (100A–200A versions);
- Professional and recreational boats and yachts.
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