Bussmann 80A Waterproof Flush-Mount Circuit Breaker CB185-80 — Ignition-Protected, Manual Reset

The Bussmann CB185-80 is an 80‑amp, Type III flush‑mount waterproof circuit breaker with a push‑to‑trip master disconnect designed for trucks, RVs, buses and marine auxiliary systems.

This sealed, high‑amp manual‑reset breaker is built to protect accessory and auxiliary circuits where reliable overcurrent protection and a convenient shutoff are required. Rated 80 A at 42 Vdc, the CB185-80 combines a low‑profile flush mounting with 1/4‑28 threaded studs and installed SEMS nuts for straightforward wiring. Its ignition‑protected design and durable housing make it suitable for demanding mobile and marine environments.

How does the CB185-80 keep my vehicle or boat circuits safe?

The CB185-80 interrupts excessive current to prevent wiring or equipment damage while staying compliant with common ignition protection standards. It’s a manual reset device that trips under fault conditions and requires a deliberate push to restore power, reducing the chance of auto‑reclosure after an unsafe event.

• 80 A continuous rating at 42 Vdc for heavy accessories
• Ignition protection per SAE J1171 for many vehicle/marine systems
• Manual reset prevents automatic re‑energizing after a trip
• Push‑to‑trip button serves as an accessible master disconnect

What installation and connection details should I know?

The CB185-80 is a flush‑mount unit sized for panel installation where a low profile is desirable. It includes SEMS nuts already installed on the 1/4‑28 threaded studs to speed installation and reduce the need for separate hardware.

• Flush mount form factor for neat panel integration
• 1/4‑28 threaded studs with installed SEMS nuts for quick wiring
• Sealed housing to resist moisture in marine and outdoor uses
• Includes unit and instruction guide for correct wiring and panel cutout

Will this breaker work with multi‑battery charging or isolator systems?

Yes—its construction and ignition protection make the CB185-80 suitable for battery charging circuits and isolator setups commonly found in multi‑battery installations. Use it to protect the charging path or accessory feeds where you need a high‑amp rated, ignition‑protected device.

• Compatible with battery isolator configurations and charging systems
• Type III rating appropriate for auxiliary/accessory circuits
• Sealed design helps maintain performance in damp compartments
• Manual reset simplifies troubleshooting after a fault

Who is this for? The Bussmann CB185-80 suits professionals and DIYers installing or upgrading auxiliary electrical systems in trucks, buses, RVs and boats who need a reliable, ignition‑protected 80 A breaker with a convenient flush‑mount master disconnect. It’s ideal when you require a rugged, moisture‑resistant breaker with easy panel mounting and ready‑to‑use connection hardware. Sold individually and backed by Bussmann’s long history in circuit protection, this breaker provides a practical solution for demanding mobile power applications.