DC Circuit Breaker for DC Circuit Interruption and Protection
If you are looking to protect your DC circuit from overload, short circuit and other problems, then LCTC is a great choice. For many years, LCTC has been dedicated to the design and manufacture of DC circuit breakers, providing safe and reliable protection for DC systems in fields such as new energy, communications, solar panel DC protection Machine and industrial automation. Our products are designed to provide solutions for problems such as short circuits and overloading of DC power.
LCTC has professional engineers and factories that jointly design and manufacture our DC circuit breakers. All of our DC circuit breakers have passed professional tests and their performance is guaranteed. You can use them with confidence in various DC circuits.
If you are interested in our products, please send us an inquiry. We will solve your problem as soon as possible.
LCTC Product
According to the rated voltage, DC circuit breakers can be classified into two types:
Feature of LCTC DC Circuit Breaker
DC circuit breakers have the following advantages.
It is suitable for high-voltage direct current environments, especially for industries such as electric vehicles and battery energy storage.
LCTC DC circuit breaker is designed specifically for DC circuits, it has stronger breaking and arc-extinguishing capabilities and is safer.
It does not rely on networks or electronic modules, has a low failure rate, and is more stable under extreme conditions.
LCTC DC circuit breaker compared with smart circuit breakers, it is cheaper and does not require additional system support.
Powerful Performance and Fast Response
When the LCTC DC circuit breaker detects overload, short circuit or other problems in the circuit, it can respond quickly and cut off the power supply to prevent the circuit problem from having a lasting impact. This effectively prevents equipment damage and even more serious fire risks that may be caused by circuit problems, thereby effectively ensuring the safety of equipment and personnel.
Choosing the right DC circuit breaker depends on several factors, including rated voltage, rated current, breaking capacity, pole configuration, and application requirements.
For DC systems, the circuit breaker voltage rating must be higher than the maximum operating voltage of the system. LCTC DC circuit breakers are designed with a DC1000V rated voltage, making them suitable for high-voltage DC applications such as solar photovoltaic systems, battery storage systems, and industrial DC distribution.
When selecting the rated current, choose a breaker based on the continuous operating current of the load. LCTC provides multiple current ratings from 6A to 63A, allowing customers to select suitable protection levels for different circuits.
We suggest checking both the normal operating current and possible short-circuit conditions before selecting a DC breaker. Choosing a breaker only based on current value without considering system voltage and fault protection may reduce safety performance.
The main difference between a DC circuit breaker and an AC circuit breaker is the way they handle electrical arcs during circuit interruption.
In AC systems, the current naturally crosses zero multiple times per second, which helps extinguish the arc. However, DC current has no natural zero crossing, so DC circuit breakers require specialized arc extinguishing designs to safely interrupt current.
LCTC DC circuit breakers are specifically designed for DC applications with a DC1000V voltage rating and 6kA breaking capacity, providing reliable short-circuit protection for DC distribution systems.
Do not replace a DC breaker with an AC breaker, even if the voltage values appear similar, because DC arc interruption requirements are different.
To select the correct DC circuit breaker current rating, calculate the continuous operating current of the load and select a breaker with an appropriate safety margin.
For example, if a DC load normally operates at 40A, a breaker rated slightly above the operating current may be more suitable to prevent unnecessary tripping.
LCTC DC circuit breakers are available in multiple rated current options: 6A / 10A / 16A / 20A / 25A / 32A / 40A / 50A / 63A
This range allows engineers to match protection requirements for different DC circuits.
We recommend considering cable size, ambient temperature, and maximum system current together rather than selecting the breaker only according to the equipment power rating.
The voltage rating of a DC circuit breaker indicates the maximum DC voltage that the breaker can safely interrupt.
LCTC DC circuit breakers are rated up to DC1000V, making them suitable for high-voltage DC applications, including solar PV systems, battery energy storage systems, industrial DC power distribution, and DC charging systems.
When selecting a DC circuit breaker, you should ensure that the breaker voltage rating is equal to or higher than the maximum system voltage.
For systems close to the voltage limit, we recommend selecting a breaker with sufficient voltage margin to improve long-term reliability.
Yes, DC circuit breakers are widely used in solar photovoltaic systems for overcurrent protection and safe isolation.
Solar PV systems generate continuous DC power, which requires dedicated DC protection devices. LCTC DC circuit breakers have DC1000V rated voltage, 6kA breaking capacity, and multiple pole options: 1P, 2P, 3P, and 4P
They are suitable for applications such as PV combiner boxes, solar inverter DC input protection, solar power distribution systems
For solar applications, we suggest selecting the breaker based on PV string voltage, short-circuit current, and installation requirements.
For BESS, DC circuit breakers need to provide reliable protection against overcurrent and short circuits.
LCTC DC circuit breakers with DC1000V rated voltage and 6kA breaking capacity are suitable for many battery storage applications requiring safe DC isolation.
Common applications include battery packs, energy storage cabinets, UPS systems, industrial backup power systems.
For BESS projects, we recommend confirming battery voltage, maximum discharge current, and short-circuit current before selecting the breaker model.
DC circuit breakers can be used in DC charging infrastructure where proper voltage and current ratings are selected.
LCTC DC circuit breakers support up to DC1000V operation and provide reliable short-circuit protection with a 6kA breaking capacity.
They can be applied in EV charging distribution systems, DC power cabinets, charging station auxiliary protection circuits.
For fast EV charging applications, you should evaluate charging current, protection coordination, and system design before choosing the breaker specification.
The main difference between 1P and 2P DC circuit breakers is the number of conductors they can disconnect.
1 Pole DC Circuit Breaker: Suitable for single-line DC protection applications.
2 Pole DC Circuit Breaker: Provides isolation for both positive and negative conductors, improving system safety.
LCTC provides 1P, 2P, 3P, 4P circuit breakers.
Breaking capacity indicates the maximum fault current that a circuit breaker can safely interrupt.
LCTC DC circuit breakers feature a 6kA breaking capacity which helps protect DC circuits against short-circuit conditions.
When selecting breaking capacity, you should consider the possible short-circuit current of the system.
For applications with higher fault current levels, we recommend confirming system requirements before selecting the breaker model.
The LCTC DC circuit breaker can operate under extreme conditions from -25 °C to 75°C.
Yes, LCTC provides OEM and ODM services for DC circuit breakers and electrical protection products.
Our customization services may include:
Product labeling
Customized packaging
Bulk orders
Technical support
With different options including 1P, 2P, 3P, and 4P configurations, and rated currents from 6A to 63A, we can support different customer project requirements.
For OEM or large-volume orders, our engineering team can help evaluate product specifications and provide suitable solutions.