DC Circuit Breaker for Solar PV, ESS & EV

Reliable DC circuit protection up to 1000V DC — safeguard your PV, ESS, and EV systems from overload and short-circuit faults.

Rated for 250–1000V DC applications
Complies with IEC 60947-2 & UL 489 standards
Ideal for solar combiner boxes, energy storage, and DC distribution cabinets
both 63A and 125A is available

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Explore Our DC Circuit Breaker Range

Reliable circuit protection for solar PV, ESS, and industrial DC systems up to 1500V — designed for performance, safety, and durability.

Destaques técnicos

Reliable DC Circuit Breakers for 250V–1000V Applications

Sinobreaker Disjuntores de corrente contínua are purpose-built for solar PV, ESS, and DC distribution systems. Available in 63A e 125A ratings, with 1P–4P configurations covering 250V to 1000V DC protection needs.

Comprehensive Voltage & Pole Options

1P – 250V DC : Single-string or low-voltage DC systems.
2P – 500V DC : Compact design for mid-range PV or ESS circuits.
3P – 750V DC : Suitable for small industrial or EV charging cabinets.
4P – 1000V DC : Ideal for higher voltage PV combiner and inverter protection.

Both 63A e 125A series share identical pole-to-voltage mapping.

High Breaking Capacity & Arc Control

Each breaker uses magnetic blow-out and arc-chute technology to safely interrupt DC faults. Breaking capacity up to 10kA ensures reliable isolation even under full load conditions.

Built for consistent performance in solar, ESS, and DC distribution environments.

Certified Protection & Compliance

Designed and tested according to IEC 60947-2 e UL 489 standards for DC circuit protection. High dielectric strength, thermal stability, and mechanical endurance guarantee long-term reliability.

Modular & User-Friendly Design

DIN-rail mounting and front wiring for easy installation.
Clear ON/OFF indicators with optional auxiliary contacts.
Compact footprint fits within standard combiner or control enclosures.

Learn more about our OEM options at DC circuit breaker manufacturer.

Valor do negócio

Increase System Safety, Reduce Failures, and Protect ROI

Deploying the right Disjuntor CC ensures safe isolation, over-current protection, and fault interruption across 250V–1000V DC systems. Reliable switching and protection reduce downtime, safeguard equipment, and stabilize long-term project returns.

Menor custo de O&M

Modular design, front wiring, and DIN-rail installation simplify maintenance. Durable contacts and long electrical life minimize replacement cycles and service costs.

Maior tempo de atividade do sistema

Fast trip response under overload or short-circuit conditions prevents damage to inverters and batteries, ensuring consistent performance in PV and ESS applications.

Bankable Reliability

Coordinated protection with Fusíveis CC and isolators supports safe operation and compliance with IEC 60947-2 standards.

Available in 63A and 125A versions, 1P–4P for 250V–1000V DC networks.
Compatible with PV combiner boxes, ESS control cabinets, and EV charging systems.
Improves equipment lifespan and supports stable LCOE across project lifecycle.

Sistemas solares fotovoltaicos - Proteção confiável contra surtos de 1000V e 1500V CC

Proteja inversores solares, caixas combinadoras e strings CC contra raios e surtos transitórios. Nossos dispositivos de proteção contra surtos de energia solar fotovoltaica garantir estabilidade e segurança a longo prazo para instalações fotovoltaicas residenciais, comerciais e em escala de serviços públicos.

Sistemas de comunicação e controle - Integridade de sinal seguro

Para estações de base de telecomunicações e redes de comunicação industrial, os DC SPDs fornecem supressão eficaz de surtos. Eles reduzem o tempo de inatividade, evitam interrupções de sinal e mantêm seguros os eletrônicos de controle sensíveis.

Sistemas de armazenamento de energia - Operação segura para gabinetes de bateria

Em racks de baterias de íons de lítio e em grande escala Projetos ESSOs DC SPDs protegem contra sobretensões transitórias. Garantindo tempo de atividade e conformidade contínuos, eles são essenciais para Dispositivo de proteção contra surtos de 1500V CC aplicativos.

Carregamento de EV e aplicações industriais de CC

Estações de carregamento de EV, carregadores rápidos de CC e sistemas de controle industrial dependem de SPDs de 1000V CC para manter a confiabilidade. Nossos dispositivos oferecem proteção consistente e vida útil prolongada do equipamento em circuitos CC de alta potência.

Why DC Circuit Breakers Matter in Modern Renewable Energy Systems

In renewable energy and industrial DC applications, Disjuntores de corrente contínua play a critical role in isolating faults, protecting equipment, and maintaining stable operation. Whether it’s a 63A breaker for 500V solar PV systems ou um 125A 1000V DC breaker for energy storage and EV infrastructure, proper circuit protection ensures safety, minimizes downtime, and extends equipment lifespan.

Unlike conventional AC breakers, Disjuntores de corrente contínua are specifically designed to extinguish persistent DC arcs, offering higher breaking capacity and thermal endurance. For PV combiner boxes, ESS battery cabinets, and DC charging networks, selecting the correct pole configuration (1P–4P) directly impacts performance, reliability, and long-term return on investment.

For complete DC protection coordination, explore integration with DC Fuse solutions and isolating switches. To ensure compliance with global standards, refer to the official IEC 60947-2 circuit breaker standard .

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Design & Deployment Checklist for DC Circuit Breakers

Practical guidance for engineers: select, install, and maintain Disjuntores de corrente contínua in solar PV, ESS, EV, and industrial DC systems. Reference: IEC 60947-2.

Seleção e coordenação

Choose breakers according to current, voltage, and circuit topology.

Select 63A or 125A based on array current and cable size.
Match poles to voltage: 1P–250V / 2P–500V / 3P–750V / 4P–1000V DC.
Coordinate with upstream Proteção do fusível CC and isolation devices.

Instalação e fiação

Ensure safe installation and correct polarity for DC operation.

Install on Trilho DIN within approved enclosures or combiner boxes.
Observe polarity marking; maintain proper torque on terminals.
Allow clearance for ventilation and easy manual access.

Maintenance & Verification

Periodic inspection ensures long-term reliability and compliance.

Check contact wear and mechanical function annually.
Verify insulation resistance and trip curve performance after service.
Keep datasheets, test reports, and inspection logs for audit readiness.
For project assistance, reach out via Contact Us.

Factory-Tested Performance & Supply Reliability

Every DC circuit breaker (63A / 125A) is factory-verified for electrical, thermal, and mechanical endurance. Sinobreaker ensures consistent quality, traceable production, and on-time delivery for 250–1000V DC PV, ESS, and industrial control applications.

Electrical & Mechanical Testing

Each breaker tested for rated current, insulation, and dielectric strength.
Arc-extinguishing performance verified under short-circuit and overload conditions.
Endurance cycling (≥10,000 operations) for mechanical life validation.
Temperature rise and thermal stability tests for continuous operation.

Production Control & Traceability

Lot-based serial tracking from components to assembled units.
Incoming material inspection and in-process QC with acceptance records.
100% outgoing functional check (trip curve, polarity, and terminal torque).
Quality documentation: datasheet, routine test report, and CoC available on request.

Delivery & Engineering Support

Standard lead time maintained for common ratings; project builds on schedule.
OEM labeling and specification matching for EPC and panel integrators.
Application notes for coordination with Fusível CC and isolator systems.
Dedicated technical contact for design verification and production follow-up (contact our engineers).

Prazo de entrega2-4 semanas (típico)

MOQFavorável ao projeto

Garantia24 meses

CertificationIEC / CE / TÜV / UL

Frequently Asked Questions about DC Circuit Breakers

A Disjuntor CC is an electrical protection device that automatically interrupts current flow when overload or short-circuit conditions occur in a direct current circuit. It isolates faults and prevents damage to inverters, batteries, and DC equipment.

Sinobreaker DC circuit breakers are available in 63A e 125A ratings, supporting voltage levels from 250V to 1000V DC. Polarity configurations include 1P, 2P, 3P, and 4P — corresponding to 250V, 500V, 750V, and 1000V DC respectively.

Unlike AC breakers, DC circuit breakers must extinguish continuous current without zero-crossing points. They use magnetic blow-out and arc chute designs to safely interrupt DC arcs, making them suitable for solar PV, ESS, and EV charging sistemas.

Install the breaker on a Trilho DIN inside a protective enclosure or combiner box. Observe polarity markings and use appropriate torque for terminals. For 4P configurations, ensure correct series connection for higher voltage strings.

Yes. All models are tested according to IEC 60947-2 e UL 489 standards, ensuring safe operation and global compatibility for renewable energy and industrial applications.

Maintenance is minimal. We recommend periodic inspection for contact wear, tightening terminal screws, and verifying mechanical operation annually. Always disconnect power before maintenance.

Absolutely. Sinobreaker DC circuit breakers are widely used in ESS battery racks, DC busbars, EV chargers, and photovoltaic arrays, providing safe disconnection and fault isolation up to 1000V DC.

You can buy directly from Sinobreaker, a professional manufacturer and supplier of DC protection components. For technical support or quotations, please visit our Entre em contato conosco página.