T Tocas 100A Circuit Breaker Manual Reset 12V–48V Waterproof IP67 UL-Listed

The T Tocas E9 is a 100 amp, manual-reset waterproof circuit breaker for 12V–48V DC systems, designed as a compact, UL-listed replacement for a standard 100A fuse.

Built to protect batteries and DC loads in harsh environments, the E9 combines a Type III manual reset button with 1/4"‑28 threaded studs and an extended surface mount footprint. The unit’s UL94V‑0 thermoplastic housing, IP67 waterproof rating, and ignition‑protection certifications make it suitable for marine, automotive, RV, and audio installations where reliability and easy resetting are important.

How does the E9 protect my electrical system?

The circuit breaker interrupts excessive current to prevent wiring and device damage, acting like a resettable fuse you can restore without replacement. Its trip threshold is set for 100 amps and meets SAE and UL ignition‑protection standards for safe operation in fuel‑area and marine environments.

• Rated for continuous operation up to 100A with manual reset capability
• Meets SAE J1625, J1171 and UL1500 ignition‑protection standards
• Reset button lets you restore the circuit without swapping fuses
• UL listing adds verified safety and performance assurance

What voltages and systems is this breaker compatible with?

The E9 is designed for DC systems from 12V up to 48V, covering most automotive, marine, RV, and DC audio applications. It is commonly used with battery banks, trolling motors, chargers, and vehicle wiring where a robust 100A protection device is required.

• Supported DC range: 12V–48V suitable for 12V and 24V battery systems
• Works with trolling motors, RV house banks, inverters, and DC amplifiers
• Replaceable alternative to fixed 100A fuse holders
• Threaded 1/4"‑28 studs for secure wiring connections

How durable and weatherproof is the E9 for outdoor use?

The E9 uses a UL94V‑0 thermoplastic housing and an IP67 rating to resist water ingress and withstand demanding conditions. Its compact, lightweight design with an extended surface mount ensures stable installation even in vibration‑prone settings like boats and off‑road vehicles.

• IP67: dust tight and protected against temporary immersion
• UL94V‑0 thermoplastic resists flame and high temperatures
• Corrosion‑resistant studs and secure mounting minimize electrical faults
• Compact footprint fits tight panels and battery compartments

How do I install and reset the breaker safely?

Installation requires mounting the unit on a flat surface and tightening the 1/4"‑28 terminals to the recommended torque for your cable lugs. To reset after a trip, press the Type III manual button once the fault source is cleared; no tools or fuse spares are needed for reset operations.

• Mount on a clean, flat surface using the extended base for stability
• Use appropriate cable lugs for the 1/4"‑28 studs and torque per wiring specs
• Confirm the underlying fault is cleared before pressing the reset button
• Periodic inspection recommended for corrosion or loose terminals

Who is this for? The T Tocas E9 100A breaker suits boat owners, RV enthusiasts, vehicle electricians, and audio installers who need a reliable, resettable 100 amp DC protection device. If you want a compact, waterproof, and UL‑listed replacement for a disposable 100A fuse—especially in marine or ignition‑sensitive environments—this unit provides a durable, easy‑to‑reset solution for protecting batteries, chargers, motors, and DC equipment.