Since 2002, TOMZN has established itself as a premier manufacturer of new energy electrical solutions, delivering high-quality protection devices for residential, commercial, solar PV, and battery systems. The TOMZN circuit breaker lineup includes Miniature Circuit Breakers (MCB), Residual Current Circuit Breakers with Overcurrent (RCBO), Manual Transfer Switches (MTS), and specialized DC circuit breakers. These DIN-rail mounted breakers provide essential safeguards against overloads, short circuits, leakage currents, and more, ensuring safety and system reliability in AC and DC applications. With robust breaking capacities, wide current ranges, and PV-specific designs, TOMZN circuit breakers meet the demands of modern electrical installations.
Essential Role of Circuit Breakers in Electrical Safety
Circuit breakers act as the first line of defense in electrical systems by automatically interrupting power during faults. MCBs protect against overloads and short circuits, while RCBOs add residual current (leakage) detection to prevent electric shocks and fires. In solar and battery setups, DC MCBs handle non-extinguishing arcs in direct current circuits. TOMZN breakers feature C-curve tripping for motor/PV loads, high breaking capacities (up to 10kA), and modular designs for easy panel integration, reducing downtime and enhancing overall system protection.
TOMZN Circuit Breaker Product Range: Comprehensive Coverage for AC and DC Needs
TOMZN’s circuit breaker category offers versatile options tailored to various voltages, poles, and applications:
- AC Mini Circuit Breakers (MCB) Models like the TOB1-63 C type provide single-pole (1P) protection at 230/400V AC, 50/60Hz, with current ratings from 3A to 63A. Higher-capacity variants include multi-pole (1P, 2P, 3P, 4P) high-current MCBs rated at 80A, 100A, and 125A, featuring 10kA breaking capacity, 35mm DIN rail mounting, and short-circuit/overload protection—ideal for main distribution or heavy loads.
- DC Mini Circuit Breakers (MCB) for PV and Battery Systems Specialized DC MCBs support photovoltaic and storage applications. Options include 1P and 2P configurations at 250V DC (80A, 100A, 125A, C-curve, battery main switch), up to 500V DC (3A to 63A, 6kA, Y-connection), 600V DC (80A-125A), and even 1000V DC (80A-125A, TOBIZ-125 or TOB7Z-63 series). These C-curve breakers ensure reliable interruption in high-voltage solar strings and serve as effective alternatives to DC fuses.
- RCBO (Residual Current Differential Automatic Circuit Breakers) Compact 18mm width models combine overcurrent and leakage protection. Examples include 1P+N configurations at 230V, 50/60Hz, with 6kA or 10kA breaking capacity. Variants feature A-type or B-curve tripping for enhanced sensitivity to residual currents, making them suitable for personnel and fire protection in homes and commercial spaces.
- Manual Transfer Switches (MTS) and Dual Power BreakersTOMZN MTS series enable safe switching between dual power sources (e.g., grid and generator). Available in 1P, 2P, 3P, 4P, and 1P+1P setups at currents like 16A, 63A, with interlock mechanisms to prevent simultaneous connection. These 50/60Hz AC breakers integrate MCB functionality for overload/short-circuit protection during transfers.
All TOMZN breakers emphasize DIN rail compatibility (18mm or 35mm), modular construction, and durability for frequent operation in demanding environments.
Key Features and Benefits of TOMZN Circuit Breakers
TOMZN circuit breakers stand out with practical, performance-driven attributes:
- Wide Current and Voltage Range — From 3A to 125A, covering AC 230/400V and DC up to 1000V for residential to solar-scale applications.
- High Breaking Capacity — Up to 10kA in AC models and 6kA+ in DC variants for reliable fault interruption.
- C-Curve Tripping Characteristics — Optimized for inductive loads, motors, and PV inverters with higher inrush tolerance.
- Multi-Pole Configurations — 1P, 1P+N, 2P, 3P, 4P options for single-phase, three-phase, or DC string protection.
- PV and Battery Specialization — Dedicated DC models with high-voltage ratings and C-curve for safe solar array and storage control.
- Leakage Protection in RCBOs — Residual current detection prevents shocks and enhances fire safety.
- Manual Transfer and Interlock — MTS models ensure secure dual-power switching without risk of backfeed.
- Easy DIN Rail Installation — Compact, modular design fits standard distribution boards quickly.
- Robust and Reliable — Built for 50/60Hz operation with proven performance in new energy systems.
These features deliver cost-effective, long-lasting protection with minimal maintenance.
Applications of TOMZN Circuit Breakers
TOMZN breakers serve diverse scenarios:
- Residential and commercial distribution panels for overload/short-circuit safeguarding.
- Solar PV systems: Protect strings, inverters, and batteries with high-voltage DC MCBs.
- Off-grid and hybrid setups: Use as main switches for battery banks.
- Dual power installations: MTS for automatic or manual grid/generator switching.
- Personnel safety: RCBOs in wet areas, kitchens, or outdoor circuits to detect leakage.
- Industrial light loads: Multi-pole high-current MCBs for machinery or HVAC.
Professionals appreciate the straightforward mounting and broad compatibility.
Why Choose TOMZN for Your Circuit Breaker Needs?
With over two decades of expertise in new energy protection, TOMZN combines quality manufacturing, innovation, and affordability. The circuit breaker range excels in PV compatibility, high breaking performance, and versatile configurations, backed by a focus on reliable electrical solutions. Whether for standard AC protection or advanced solar deployments, TOMZN breakers offer trusted safety and efficiency.
