{"product_id":"t-tocas-300a-manual-reset-circuit-breaker-3-8-studs-waterproof-ip67-12-48v-dc","title":"T Tocas 300A Manual Reset Circuit Breaker 3\/8\" Studs — Waterproof IP67, 12–48V DC","description":"\u003cp\u003e\u003cstrong\u003eThe T Tocas E9 is a reusable 300 amp manual-reset circuit breaker with 3\/8\" studs, designed for waterproof, ignition-protected DC protection across 12–48V systems.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eBuilt to replace single-use fuses, the E9 offers a switchable, Type 3 manual reset design that combines heavy-duty current interruption with IP67-level water resistance and industry safety approvals. Its durable UL 94V-0 housing and stainless steel 3\/8\"-16 hardware make it appropriate for harsh environments where reliable overcurrent protection is essential—trucks, RVs, marine craft, trolling motors, DC audio and other 12V to 48V installations.\u003c\/p\u003e\n\n\u003ch3\u003eHow does the E9 protect electrical systems during overloads?\u003c\/h3\u003e\n\u003cp\u003eWhen current exceeds safe limits, the E9 interrupts the circuit mechanically, preventing damage to wiring and components. After the fault is corrected, the breaker can be manually reset rather than replaced, saving time and consumables.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e300 amp interrupt rating suitable for high-current feeders\u003c\/li\u003e\n  \u003cli\u003eTrip characteristics sized for automotive and marine DC loads\u003c\/li\u003e\n  \u003cli\u003eManual reset avoids fuse replacement downtime\u003c\/li\u003e\n  \u003cli\u003eIgnition-protected construction reduces spark risk in fuel-vapor areas\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat electrical specifications and performance ratings matter?\u003c\/h3\u003e\n\u003cp\u003eThe E9 functions across common DC service voltages and withstands very high prospective currents for short durations. It lists specific short-circuit withstand numbers and is rated to operate across extreme temperatures.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eOperating voltage range: 12V to 48V DC\u003c\/li\u003e\n  \u003cli\u003eHigh short-circuit withstand: 2,500A at 14Vdc, 1,500A at 48Vdc\u003c\/li\u003e\n  \u003cli\u003eReplaces standard 300A fuses while providing reset capability\u003c\/li\u003e\n  \u003cli\u003eOperating temperature range: -32°C to 82°C\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eIs the E9 suitable for wet or marine environments?\u003c\/h3\u003e\n\u003cp\u003eYes—the unit is engineered for exposure to moisture and splash conditions. Its IP67 rating and robust housing meet automotive and marine safety standards, making it a practical choice for boats and outdoor equipment.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eIP67 waterproof protection keeps internal parts dry under temporary submersion\u003c\/li\u003e\n  \u003cli\u003eUL 94V-0 flame-retardant casing for elevated safety\u003c\/li\u003e\n  \u003cli\u003eCorrosion-resistant stainless steel hardware for saltwater resilience\u003c\/li\u003e\n  \u003cli\u003eMeets SAE and UL specifications used in vehicle and marine installations\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow does installation and maintenance look in everyday use?\u003c\/h3\u003e\n\u003cp\u003eInstallation is straightforward: two 3\/8\"-16 studs make secure bolted connections to battery cables or bus bars. Routine maintenance is minimal—inspect fasteners and housing seals, then reset the breaker if it trips after resolving the cause of overload.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e3\/8\"-16 stainless steel studs with insulators for secure connections\u003c\/li\u003e\n  \u003cli\u003eMounting options compatible with battery boxes, panels, and posts\u003c\/li\u003e\n  \u003cli\u003eManual-reset switch design simplifies restoration of service\u003c\/li\u003e\n  \u003cli\u003eServes as a reusable alternative to disposable 300A fuses\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho this is for: The T Tocas E9 300A manual-reset breaker is intended for installers, fleet technicians, marine owners, RV and off-grid system builders, and audio or trolling-motor enthusiasts who need robust overcurrent protection that withstands water exposure and heavy currents. Choose it when you want a resettable, ignition-protected solution that replaces 300A fuses and adheres to recognized automotive and marine standards.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Can the E9 replace a 300A fuse in my boat?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. The E9 is a resettable alternative to a 300A fuse and is rated for marine use with IP67 protection and ignition protection.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: What voltages does this breaker support?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: The breaker works across 12V to 48V DC systems and is specified for high short-circuit currents at 14V and 48V.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"T Tocas","offers":[{"title":"Default Title","offer_id":67587194847417,"sku":"B06Y3T3YND","price":87.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0822\/3765\/3177\/files\/t-tocas-e9-front-view.jpg?v=1790501770","url":"https:\/\/redleafauto.ca\/products\/t-tocas-300a-manual-reset-circuit-breaker-3-8-studs-waterproof-ip67-12-48v-dc","provider":"Redleaf Auto","version":"1.0","type":"link"}