Trosfina 12V Remote Battery Disconnect Switch 250A — Smart Anti-Theft Kill Switch with Remote & Manual Override

Keep your vehicle battery protected from parasitic drains and accidental discharge with this intelligent remote disconnect. Designed for 12V systems, the unit combines an energy-efficient magnetic latching relay with automatic voltage monitoring, a manual override, and a long-range remote for convenient control. Built to heavy-duty electrical standards, it fits most battery posts and tolerates high cranking currents while minimizing standby current draw.

How does this switch protect my battery when a vehicle sits idle?

The switch watches battery voltage and disconnects power before deep discharge can occur. When voltage falls under a safe threshold the system opens the circuit after a short delay, shutting off parasitic loads that would otherwise run the battery flat.

• Automatic cutoff below 11.8V to prevent over-discharge
• Short delay to avoid nuisance trips from brief voltage dips
• Low standby current (approx. 5mA) to avoid adding drain when parked

Can I control it remotely and still use a manual override?

Yes — the unit supports dual control: a wireless remote for convenience and a manual push-button on the device for maintenance or emergencies. Remote range covers typical parking and campsite distances, while the manual control allows safe local operation.

• Wireless remote operation with an effective 30–70 meter range
• Manual override button for direct on/off switching
• Remote temporarily disabled above 13.6V to prevent accidental operation while charging

Will this handle heavy-duty starting currents and fit most batteries?

The switch uses high-purity copper contacts and a magnetic latching relay rated for 250A continuous current and up to 1200A cranking current. Its mechanical design includes adjustable shims so installers can adapt it to standard and smaller battery posts.

• 250A continuous rating with 1200A cranking capacity
• High-purity copper conductors for low resistance and durability
• Adjustable shims to fit a wide range of battery terminal sizes

How does the smart energy-saving design differ from a traditional relay?

Instead of a continuously powered coil, this model uses a magnetic latching relay that requires power only during switching. That yields extremely low standby current and greatly reduces parasitic loss while parked long-term.

• Magnetic latch keeps contacts engaged without continuous coil power
• Standby draw around 0.005A (5mA) compared with tens of milliamps for standard relays
• Better for long-term storage, seasonal vehicles, and boats in mooring

Who is this for? Installers, DIY vehicle owners, RVers, marine users, fleet operators and anyone who wants reliable battery preservation and theft-deterrent isolation. If you need an easy way to stop parasitic drain, secure a vehicle electrically, or add a remote battery cutoff to heavy-duty 12V systems, this Trosfina switch is built for that purpose.