T Tocas E9 150A DC Circuit Breaker Manual Reset 12–48V Waterproof IP67 Ignition-Protected

The T Tocas E9 is a 150A manual-reset DC circuit breaker that provides waterproof, ignition-protected overcurrent protection and acts as a reliable battery disconnect for 12–48V systems.

Designed for marine, automotive, RV and off-grid DC applications, the E9 combines a compact, lightweight form with rugged materials and safety certifications. It replaces a standard 150A fuse with a resettable breaker that installs using 1/4"-28 threaded studs and an extended surface mount. The unit meets IP67 waterproofing and UL 94V-0 thermoplastic housing requirements while carrying SAE J1625, J1171, and UL1500 ignition-protection certifications.

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

The E9 interrupts excessive current with a Type III manual-reset mechanism, preventing sustained overloads and offering a quick way to disconnect power after a trip. Its design tolerates marine and automotive environments and can be manually reset by pressing the switch button once the fault is cleared.

• Resettable design replaces a 150A fuse for repeated protection cycles.
• Type III manual reset allows intentional disconnection and easy recovery.
• Certified to SAE J1625, J1171 and UL1500 for ignition-protected use.
• Suitable for 12V to 48V DC electrical systems.

Is the E9 durable enough for marine and outdoor use?

The E9 is built with an IP67-rated enclosure and UL 94V-0 thermoplastic housing to resist water ingress and flame propagation. Those features, combined with corrosion-resistant studs and a compact surface mount, make it appropriate for boats, trolling motors, and outdoor vehicle installations.

• IP67 waterproofing protects against immersion and heavy spray.
• UL 94V-0 thermoplastic reduces flammability risk in confined spaces.
• Extended surface-mount footprint for secure attachment and airflow.
• 1/4"-28 threaded studs designed for robust electrical connections.

What installations and systems is this 150A breaker suitable for?

The E9 fits a wide range of DC applications where a resettable 150A protection device is needed. Typical uses include marine battery banks, trolling motors, RV power systems, trucks, buses, battery chargers and DC audio setups that require both high current handling and ignition protection.

• Marine systems: battery banks, trolling motors, and inboard/outboard circuits.
• Automotive/RV: starter/auxiliary circuits, charging lines, and house loads.
• Commercial vehicles: trucks and buses requiring ignition-protected breakers.
• Specialty: battery chargers and DC audio systems needing reliable overcurrent protection.

How do I mount and wire the T Tocas E9 safely?

Mount the breaker on a flat, accessible surface using the extended surface-mount base and secure connections to the 1/4"-28 studs with properly rated ring terminals and lock nuts. Ensure wiring follows polarity and current-carrying ratings, and place the breaker where manual reset access and ventilation are available.

• Use 1/4"-28 ring terminals and correctly torqued nuts for reliable connections.
• Install in a dry, accessible location with space for manual reset operation.
• Match wire gauge to 150A continuous rating and follow vehicle/marine wiring codes.
• Confirm ignition-protection requirements when installed near fuel systems or battery compartments.

Who this is for: The T Tocas E9 150A breaker is aimed at boat owners, RV enthusiasts, commercial vehicle technicians and anyone managing heavy-duty 12–48V DC circuits who prefers a resettable, compact, waterproof and ignition-protected protection device. If you need a dependable replacement for a 150A fuse or a robust battery disconnect that withstands harsh environments, the E9 offers certified safety and straightforward installation.