T Tocas 100A DC Circuit Breaker E9 — Manual Reset, IP67 Waterproof, 12V–48V Protection

The T Tocas E9 is a 100 amp, manually resettable, IP67 waterproof DC circuit breaker designed to protect 12V–48V electrical systems in marine, automotive, and RV applications.

Compact and built for harsh environments, the E9 replaces single-use fuses with a resettable switch that isolates battery power after overloads or short circuits. With UL-rated materials, threaded studs for secure connections, and ignition-protection certifications, this breaker is intended for permanent installation where reliability and corrosion resistance matter.

How does the E9 protect my 12V–48V system?

When current exceeds 100 amps, the E9 trips its internal mechanism to interrupt the circuit, preventing wiring and component damage. Instead of replacing a fuse, you press the manual reset once the fault is cleared to restore power.

• 100 amp trip rating suited for high-current DC circuits
• Manual Type III reset button for quick restoration
• Acts as both circuit breaker and battery disconnect switch
• Useful for protecting trolling motors, chargers, and DC audio systems

Will it withstand marine and outdoor conditions?

The E9 is built for exposure: its UL 94V-0 thermoplastic housing and IP67 sealing block dust and water ingress. Corrosion-resistant studs and ignition-protection certifications make it appropriate for boats and other damp or vibration-prone environments.

• IP67 rated: dust-tight and temporary immersion protection
• Thermoplastic case meets flame-retardant UL 94V-0 standard
• Certified to SAE J1625, J1171 and UL1500 for ignition-protection
• Extended surface mount and sturdy studs for secure installs

How do I install and wire the T Tocas E9?

Installation is straightforward: mount the breaker using the extended surface-mount base and make electrical connections to the 1/4"-28 threaded studs. Tighten terminals to manufacturer torque specs and position the reset button for easy access, keeping cabling clear of moving parts and heat sources.

• 1/4"-28 threaded studs for standard ring terminals
• Compact, lightweight design saves panel space
• Mount on solid flat surface using the extended base flange
• Suitable for inline battery protection on positive conductors

What equipment is compatible with this 100A breaker?

The E9 is versatile across transportation and marine electrical systems. It protects high-current circuits such as starter feeds, inverter inputs, trolling motors, and multi-rail DC audio systems while functioning as a convenient battery disconnect.

• Boats: trolling motors, bilge pumps, and battery banks
• RVs and campers: house battery and inverter protection
• Commercial vehicles: buses, trucks, and accessory circuits
• Battery chargers and DC audio amplifiers requiring 100A protection

Who is this for? The T Tocas E9 100A manual reset circuit breaker suits boat owners, RV installers, fleet technicians, and DIY electricians who need a robust, reusable overcurrent protector rated for harsh environments. If you want a compact, UL-rated breaker that doubles as a battery disconnect and survives wet, vibration-prone installations, the E9 is built to meet those needs without frequent fuse replacements.