Bussmann CB185-80 Waterproof 80A Flush Mount Circuit Breaker — Push‑to‑Trip, Ignition‑Protected

The Bussmann CB185-80 is a waterproof, flush-mount 80‑amp manual‑reset circuit breaker with a push‑to‑trip master disconnect, designed for trucks, RVs, buses and marine accessory circuits.

Built for demanding vehicle and marine electrical systems, this Type III high‑amp breaker delivers protected, resettable overload protection in a sealed package. The unit fits flush into panels, uses 1/4‑28 threaded studs with SEMS nuts for fast installation, and meets ignition‑protection requirements for many battery charging and accessory circuits.

How does the CB185-80 perform in wet or outdoor environments?

The CB185-80 features a sealed waterproof housing engineered to keep moisture and contaminants away from internal contacts, providing reliable operation in damp, marine or exposed vehicle locations. The robust enclosure and corrosion‑resistant hardware help maintain consistent performance where other components might fail.

• Sealed waterproof case for splash and condensation resistance
• Corrosion‑resistant studs and installed SEMS nuts
• Designed for marine and outdoor vehicle use

What installation and wiring details should I expect?

This breaker installs quickly using its flush‑mount design and 1/4‑28 threaded studs, with SEMS nuts included. The push‑to‑trip button is accessible from the flush surface so you can manually disconnect the circuit without removing the unit from the panel.

• Flush mount for neat panel installation
• 1/4‑28 threaded studs compatible with standard ring/bootlace terminals
• SEMS nuts preinstalled to simplify wiring

Will this breaker work with multi‑battery charging systems and isolators?

Yes — the CB185 series is commonly used in auxiliary and charging circuits where battery isolators manage multiple battery banks. The CB185-80’s ignition‑protected design and 42 Vdc rating make it suitable for many charging and accessory circuits, offering resettable protection without replacing fuses.

• Complies with ignition‑protection expectations for vehicle systems
• Rated 80 A at 42 Vdc for high‑current accessory circuits
• Manual reset allows quick restoration after an overload event

How does the push‑to‑trip master disconnect benefit everyday use?

The push‑to‑trip button provides a convenient way to kill power to the protected circuit without removing fuses or isolating the battery. It's useful for maintenance, storage, or when you need to ensure accessories remain off during long periods of inactivity.

• Acts as an accessible master disconnect for the protected circuit
• Quick manual reset restores power after fault correction
• Flush access keeps panels clean and prevents accidental trips

Who is this for: The Bussmann CB185-80 is intended for installers, fleet technicians, RV owners, and marine electricians who need a compact, high‑amp resettable breaker for accessory and charging circuits. If you want a durable, waterproof solution with a flush appearance, push‑to‑trip convenience, and compatibility with multi‑battery systems, this breaker is a practical choice.

Included: one CB185-80 unit and an instruction guide. Bussmann’s long history in fuse and circuit protection manufacturing and Eaton’s product network support reliable sourcing and application guidance for vehicle and marine electrical installations.