TOMZN TOB7Z-63 DC MCB – Rating Options

TOMZN TOB7Z-63 2P DC Circuit Breaker Price in Bangladesh

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Secure your solar investment with the TOMZN TOB7Z-63 DC Circuit Breaker, the ultimate line of defense for your PV system. Specifically engineered for DC applications, this breaker handles a massive voltage range from 12V up to 1000V, making it the perfect fit for everything from small off-grid cabins to large-scale solar arrays. Unlike standard AC breakers that can fail under DC arcs, the TOMZN TOB7Z-63 features a dedicated non-polarized design and rapid arc-extinguishing technology to prevent fires and equipment damage. Don’t leave your expensive inverters and batteries to chance—trust the “Pro’s Choice” for reliable, industrial-grade solar protection.

Features

• Wide Voltage Range: Rated for operation from 12V DC up to 1000V DC, ensuring compatibility with various solar string configurations.
• Non-Polarized Wiring: Simplifies installation; the breaker works effectively regardless of which side the positive and negative wires are connected to.
• High Breaking Capacity: Rated for 6kA, providing robust protection against high-current surges and short circuits.
• Rapid Response: Features a thermal-magnetic trip mechanism that acts instantly to isolate faults, protecting sensitive inverters and charge controllers.
• Standard Din Rail Mount: Designed for easy 35mm Din Rail installation inside standard distribution boxes.
• Durable Construction: Built with flame-retardant materials and high-conductivity copper components for long-term outdoor cabinet use.

Specifications

• Brand: TOMZN
• Model: TOB7Z-63
• Number of Poles: 2P (Double Pole)
• Rated Current (In): 10A / 20A / 32A (Selectable)
• Rated Voltage (Un): DC 12V–1000V
• Breaking Capacity: 6kA
• Trip Curve: Type C
• Mechanical Life: 20,000 Cycles
• Electrical Life: 10,000 Cycles
• Operating Temp: -25°C to +70°C
• Installation: 35mm DIN Rail

Benefits

• Fire Prevention: DC arcs are much harder to extinguish than AC; this breaker is purpose-built to snap DC arcs safely.
• Equipment Longevity: Protects expensive LiFePO4 batteries and hybrid inverters from damaging overcurrent spikes.
• Easy Maintenance: Acts as a convenient DC Isolator, allowing you to safely shut off the solar array for maintenance or cleaning.
• Flexible Application: One model covers 12V/24V/48V battery systems as well as high-voltage 600V+ PV strings.

How It Works

1. Selection: Choose the amperage rating (10A/20A/32A) that is roughly 1.25x to 1.5x your solar panel’s short-circuit current ($I_{sc}$).
2. Mounting: Clip the breaker onto a 35mm DIN rail inside a distribution box.
3. Wiring: Connect the Positive (+) and Negative (-) wires from the solar panels to the top terminals, and the output to the charge controller/inverter to the bottom terminals.
4. Testing: Flip the switch to “ON.” If a short circuit occurs, the breaker will automatically trip to the “OFF” position.
5. Isolation: Use the lever to manually cut off power whenever you need to work on the system safely.

Perfect For

• Solar Home Systems: Protecting the connection between the solar array and the inverter.
• RV & Marine Power: High-capacity DC protection for battery banks and solar chargers on boats or campers.
• Electric Vehicle (EV) DC Circuits: Managing lower-power DC charging or auxiliary circuits.
• Wind Turbine Systems: Safely isolating DC output from wind generators.