TOMZN 2P 63A DC MCB 1000V Solar DC Circuit Breaker

TOMZN 2P 63A 1000V DC MCB – Reliable Protection for Solar and DC Power Systems

The TOMZN 2P 63A 1000V DC Miniature Circuit Breaker (MCB) is engineered to deliver dependable protection for high-voltage direct current (DC) systems, especially those used in solar photovoltaic (PV) installations, battery energy storage systems (BESS), and other DC power applications. Designed to handle up to 1000V DC, this circuit breaker safeguards against overloads and short circuits, ensuring long-term system reliability and safety.

Its two-pole design allows for simultaneous disconnection of both positive and negative lines, providing full circuit isolation — a critical safety feature for solar DC applications. The 63A rated current makes it suitable for medium-sized solar strings and inverter inputs, offering a balance between capacity and precision.

Built for durability and consistent performance, the TOMZN DC MCB features a thermal-magnetic trip mechanism, allowing for quick reaction to both gradual overload conditions and sudden fault currents. Housed in a flame-retardant thermoplastic enclosure, it withstands high temperatures and environmental stresses common in solar installations.

Why Choose TOMZN 2P 63A 1000V DC MCB?

TOMZN is trusted globally for its practical, cost-effective circuit protection solutions. The 2P 63A 1000V DC MCB is tailored for the unique demands of DC solar and battery systems, offering high performance, safety, and long service life. Whether you’re installing a new solar project or upgrading existing protection, TOMZN ensures that your system stays protected, efficient, and compliant.

Key Features:

• Rated Current: 63A

• Poles: 2P (positive and negative conductors)

• Voltage Rating: Up to 1000V DC

• Breaking Capacity: High DC short-circuit capacity

• Tripping Mechanism: Thermal-magnetic

• Mounting Type: Standard 35mm DIN rail

• Housing Material: Flame-retardant, high-impact thermoplastic (UL94-V0 rated)

• Indicator: Clear ON/OFF status window

• Operating Temperature Range: -25°C to +70°C

• Electrical Life: ≥ 6,000 operations

• Mechanical Life: ≥ 20,000 operations

Benefits:

• Safe 2-Pole Isolation: Disconnects both DC lines for full circuit protection

• Accurate Fault Protection: Responds quickly to overloads and short circuits

• Compact & Easy to Install: Fits standard DIN rails and enclosures

• Built for Harsh Environments: Flame-retardant, UV-resistant construction

• Long-Term Reliability: High durability for continuous operation in solar systems

Applications:

• Solar PV systems (string protection, inverter input protection)

• Battery energy storage systems (ESS)

• Hybrid and off-grid power systems

• DC combiner boxes and distribution panels

• Industrial DC power equipment