DIHOOL 160A DC Circuit Breaker — 240V Panel-Mounted Thermal-Magnetic Master Switch

The DIHOOL Main 160 Amp DC Circuit Breaker is a heavy-duty thermal-magnetic master switch that protects and isolates 12–250V DC and 90–240V AC systems in vehicles, boats, RVs, and battery arrays.

This compact, panel-mounted disconnect combines high short-circuit breaking capacity with silver-alloy contacts for reliable conductivity and long service life. Designed for DC battery banks, photovoltaic arrays, UPS racks, marine installations and mobile power systems, the breaker provides overload, short-circuit protection and a manual isolation function so you can cut power quickly and safely during maintenance or emergencies.

How does the DIHOOL 160A breaker protect my electrical system?

The unit uses a thermal-magnetic trip mechanism that responds to prolonged overloads (thermal) and sudden high-current faults (magnetic). That dual-action design minimizes nuisance trips while ensuring fast interruption during dangerous short-circuits.

• Thermal-magnetic trip for both overload and instant fault detection
• Short-circuit breaking capacity rated at 25 kA for rapid interruption
• High silver-content contacts (30% moving, 45% stationary) for stable conductivity
• Manual disconnect lever to isolate circuits for maintenance or safety

What voltages and applications are compatible with this master switch?

The DIHOOL breaker is specified for DC systems from 12 V up to 250 V and AC use from 90 V to 240 V, making it versatile across automotive, marine, solar and backup power installations. It’s commonly fitted where a robust battery disconnect or main protection device is required.

• DC: 12–250 V suitable for battery banks and trolling motors
• AC: 90–240 V compatibility where AC isolation is needed
• Typical uses: car, RV, boat, marine, photovoltaic arrays, UPS and datacenter battery racks
• Panel-mounted design with screw holes for straightforward installation

How big is the breaker and how do I mount it?

The housing measures 164 mm × 43 mm × 108 mm and is designed for secure panel attachment using screws. The form factor keeps the footprint small while providing clear terminal access for heavy-gauge cabling.

• Compact dimensions: 164mm x 43mm x 108mm for tight spaces
• Mounts through-panel with standard screw fittings
• Terminals sized for high-current battery or busbar connections
• Durable construction suited to vehicle and marine environments

What materials and performance details improve durability?

Contact metallurgy and short-circuit rating are key to long-term reliability. The DIHOOL breaker’s contacts use higher silver content where it matters most, and the device is rated to interrupt high fault currents safely without welding shut.

• 30% silver in moving contacts and 45% in stationary contacts for low-resistance connections
• 25 kA short-circuit breaking capacity to clear heavy faults
• Thermal-magnetic trip mechanism resists nuisance trips while protecting equipment
• Built for frequent switching and harsh electrical environments

Who is this for? The DIHOOL Main 160 Amp DC Circuit Breaker is aimed at installers, fleet technicians, marine electricians, off-grid homeowners and DIYers who need a dependable primary disconnect that combines high interrupting capacity with clear manual isolation. Choose this breaker when you require a compact, panel-mounted master switch to protect battery banks, solar systems, UPS racks, vehicles and boats without compromising conductive performance or safety.