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.
直流DC-specific interruption
Series configurationVerify poles and polarity
63A / 125APublished current platforms
250V–1200V classesConfirm exact series data
直流MCBとは何ですか？
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
空欄は、現在の製品概要において値が利用できないことを示します。仕様を決定する前に、モデルページを開くか、データシートを請求してください。.
| シリーズ | Current platform | システム | ポール | 直流電圧 |
|---|---|---|---|---|
| VIOX VOB3-63DC | 63A | 直流 | — | — |
| VIOX VOB6-63DC | 63A | 直流 | — | — |
| VIOX VOB2-125DC | 125A | 直流 | — | — |
DC MCB Applications
製品の正確な特性を確認する必要がある典型的な環境.
DC MCB Selection Questions
詳細な回路検証を行う前の、製品ファミリーの予備比較のためのクイックアンサー。.
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.
極性は重要ですか？
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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