DC Miniature Circuit Breakers (DC MCB)
Compare the published VIOX VOB3-63DC, VOB6-63DC and VOB2-125DC series for direct-current circuit protection in solar PV, battery, telecom and industrial DC systems.
Corriente continuaDC-specific interruption
Series configurationVerify poles and polarity
63A / 125APublished current platforms
250V–1200V classesConfirm exact series data
¿Qué es un MCB de CC?
A DC miniature circuit breaker is designed to interrupt overload and short-circuit current in a direct-current circuit within its published voltage, pole, polarity and breaking characteristics.
DC arcs do not pass through a natural current zero in the same way as AC arcs. The breaker construction and required series-pole arrangement must therefore be selected from explicit DC ratings rather than inferred from an AC device.
DC MCB Series Overview
Three published VIOX series for compact and higher-current DC protection. Open each product page for exact voltage, pole and interruption data.
How to choose a DC MCB
Start with maximum system voltage and fault conditions, then verify poles, polarity and circuit coordination.
Maximum DC voltage
Confirm the worst-case circuit voltage and the required pole arrangement from the exact datasheet.
Current and breaking capacity
Coordinate rated current with conductor capacity and verify prospective DC fault current.
Poles and polarity
Follow the approved wiring diagram, including any series-pole or polarity requirements.
Application coordination
Check source behavior, upstream and downstream protection, isolation and environmental conditions.
Treat DC interruption as a system decision
A matching current number is not enough; voltage, pole arrangement, polarity and available fault current determine suitability.
Compare published DC MCB series
Las celdas en blanco significan que el valor no está disponible en el resumen actual del producto. Abra la página del modelo o solicite su hoja de datos antes de realizar la especificación.
| Serie | Current platform | Sistema | Polos | Tensión de CC |
|---|---|---|---|---|
| VIOX VOB3-63DC | 63A | Corriente continua | — | — |
| VIOX VOB6-63DC | 63A | Corriente continua | — | — |
| VIOX VOB2-125DC | 125A | Corriente continua | — | — |
DC MCB Applications
Entornos típicos donde deben verificarse las características exactas del producto.
Edificios residenciales
Residential solar and storage circuits where the exact DC ratings match the system.
Automatización industrial
Control-power, auxiliary and machine DC distribution within the published breaker duty.
Energía solar y almacenamiento de energía
PV strings, combiner circuits and battery systems using verified DC voltage and polarity arrangements.
DC MCB Knowledge & Selection Guides
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DC MCB Selection Questions
Respuestas rápidas para la comparación preliminar de familias de productos antes de la verificación detallada del circuito.
Can an AC MCB be used in a DC circuit?
Only if the manufacturer explicitly publishes the required DC voltage, pole and wiring configuration for that exact device. Do not infer DC suitability from an AC rating.
Why can multiple poles be connected in series?
Approved series-pole arrangements can divide the DC voltage and support arc interruption, but only the wiring shown for the exact model may be used.
¿La polaridad es importante?
Some DC breakers are polarity-sensitive and others publish polarity-independent arrangements. Follow the selected model markings and diagram.
How is rated current selected?
Coordinate continuous load, conductor capacity, ambient conditions and protective characteristics, then verify the exact datasheet.
Which details are needed for selection?
Provide maximum DC voltage, load current, source and battery or PV details, available fault current, poles, wiring arrangement, quantity and target market.
Need the Right DC MCB?
Let’s Verify the DC Circuit.
Send the maximum DC voltage, load current, source type, available fault current, poles, wiring arrangement, quantity and target market.
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