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DC MCCB | 250V 250A Moulded Case Circuit Breaker
KUANGYA DC Circuit Protection
DC MCCB for Battery, ESS and Low-Voltage PV Circuits
MCCB-250DC is a compact 1-pole moulded case circuit breaker rated 250A at 250V DC, with a nameplate Icu of 25kA. Use this page to review confirmed ratings, selection checks and project information before requesting a quotation.
250 В ПОСТОЯННОГО ТОКАНоминальное рабочее напряжение
250AНоминальный ток
25 кАUltimate breaking capacity (Icu)
1 PoleCompact DC format
What Is a DC MCCB?
A DC moulded case circuit breaker provides switching and overcurrent protection for a correctly engineered direct-current circuit. Compared with a miniature circuit breaker, an MCCB is generally selected where higher current, higher fault-duty or more robust panel integration is required. DC arc interruption is demanding, so voltage, polarity, pole arrangement and prospective short-circuit current must be verified for the exact application.
MCCB-250DC Confirmed Specifications
| Параметр | Confirmed value | Selection meaning |
|---|---|---|
| Product type | DC moulded case circuit breaker | For suitably engineered DC circuits |
| Модель | MCCB-250DC | KUANGYA product designation |
| Количество столбов | 1P | Does not automatically isolate every live conductor |
| Номинальный ток (В) | 250A | Check conductor ampacity, enclosure temperature and derating |
| Номинальное рабочее напряжение (Ue) | 250 В ПОСТОЯННОГО ТОКА | Maximum operating voltage must remain within the device rating |
| Ultimate breaking capacity (Icu) | 25 кА | Available fault current must be assessed at the installation point |
| Service breaking capacity (Ics) | 75% of Icu | Confirm project duty and coordination requirements |
Values above are based on the product nameplate and current product page. Confirm the offered model, documentation and applicable certification scope before ordering.
Типовые применения
Battery & ESS
DC distribution and protection in battery banks and energy-storage cabinets after calculation of maximum voltage and fault current.
Low-Voltage Solar PV
PV circuits whose maximum operating and open-circuit voltage remain within the device rating under the lowest expected temperature.
Industrial DC Distribution
Control power, charging equipment and DC panels requiring a 250A moulded-case protective device.
Information Needed for MCCB Selection
Send these values with your enquiry so our team can check the model more efficiently:
- Maximum continuous DC system voltage
- Normal load current and conductor size
- Calculated prospective short-circuit current
- Battery, ESS, PV or industrial application
- Required poles and isolation arrangement
- Ambient temperature and enclosure conditions
- Upstream/downstream protective devices
- Quantity, destination country and OEM needs
DC MCCB vs DC MCB
| Selection point | DC MCCB | DC MCB |
|---|---|---|
| Typical use | Higher-current feeders and panel protection | Lower-current branch circuits |
| Form factor | Moulded-case, panel mounted | Compact modular/DIN-rail format |
| Selection priority | Current, voltage, fault duty, poles and coordination | Current, voltage, trip curve, fault duty and poles |
This comparison is general. Final device selection must be based on the exact manufacturer data and project design.
Часто задаваемые вопросы
Can a 250V DC MCCB be used on a higher-voltage system?
No. The maximum operating voltage, including credible system conditions, must not exceed the device’s stated DC rating. Use a model and pole arrangement specifically documented for the higher voltage.
Is a 1P MCCB a complete DC isolator?
Not automatically. The required number of poles and isolation arrangement depend on the earthing system, live conductors, equipment instructions and local rules.
Is 25kA always sufficient?
Only when the calculated prospective short-circuit current at the installation point, together with the required coordination and duty, is within the device’s documented capability.
What should I send for an accurate quotation?
Provide system voltage, load current, calculated fault current, application, pole requirement, quantity, destination country and any OEM or certification requirements.
Related Protection Products
Need Model Confirmation or OEM Pricing?
Tell KUANGYA your electrical parameters and purchasing requirements. We will help confirm the suitable model before quotation.
