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.
ກະແສໄຟຟ້າໂດຍກົງDC-specific interruption
Series configurationVerify poles and polarity
63A / 125APublished current platforms
250V–1200V classesConfirm exact series data
DC MCB ແມ່ນຫຍັງ?
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.
VIOX VOB3-63DC
ເຄື່ອງຕັດວົງຈອນຂະໜາດນ້ອຍສຳລັບໄຟຟ້າກະແສກົງ (DC MCB)- Current platform
- 63A
- ລະບົບ
- ກະແສໄຟຟ້າໂດຍກົງ
VIOX VOB6-63DC
ເຄື່ອງຕັດວົງຈອນຂະໜາດນ້ອຍສຳລັບໄຟຟ້າກະແສກົງ (DC MCB)- Current platform
- 63A
- ລະບົບ
- ກະແສໄຟຟ້າໂດຍກົງ
VIOX VOB2-125DC
ເຄື່ອງຕັດວົງຈອນຂະໜາດນ້ອຍສຳລັບໄຟຟ້າກະແສກົງ (DC MCB)- Current platform
- 125A
- ລະບົບ
- ກະແສໄຟຟ້າໂດຍກົງ
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
ຊ່ອງຫວ່າງໝາຍເຖິງຄ່ານັ້ນບໍ່ມີຢູ່ໃນບົດສະຫຼຸບຜະລິດຕະພັນປັດຈຸບັນ. ກະລຸນາເປີດໜ້າຮຸ່ນຜະລິດຕະພັນ ຫຼື ຮ້ອງຂໍເອກະສານຂໍ້ມູນທາງເຕັກນິກ (datasheet) ກ່ອນການກຳນົດສະເປັກ.
| ຕໍ່ລຽນ | Current platform | ລະບົບ | ຣ | ແຮງດັນໄຟຟ້າກະແສກົງ (DC voltage) |
|---|---|---|---|---|
| VIOX VOB3-63DC | 63A | ກະແສໄຟຟ້າໂດຍກົງ | — | — |
| VIOX VOB6-63DC | 63A | ກະແສໄຟຟ້າໂດຍກົງ | — | — |
| VIOX VOB2-125DC | 125A | ກະແສໄຟຟ້າໂດຍກົງ | — | — |
DC MCB Applications
ສະພາບແວດລ້ອມທົ່ວໄປທີ່ຕ້ອງມີການກວດສອບຄຸນລັກສະນະຂອງຜະລິດຕະພັນຢ່າງລະອຽດ.
ອາຄານທີ່ຢູ່ອາໄສ
Residential solar and storage circuits where the exact DC ratings match the system.
ອັດຕະໂນມັດອຸດສາຫະກໍາ
Control-power, auxiliary and machine DC distribution within the published breaker duty.
ພະລັງງານແສງຕາເວັນ ແລະ ການຈັດເກັບພະລັງງານ
PV strings, combiner circuits and battery systems using verified DC voltage and polarity arrangements.
DC MCB Knowledge & Selection Guides
ບົດຄວາມທັງໝົດ
ນິຍາມ ແລະ ຫຼັກການພື້ນຖານການອະທິບາຍກ່ຽວກັບເບຣກເກີໄຟຟ້າກະແສກົງ (DC Circuit Breaker): ແຜນວາດການຕໍ່ສາຍ, ຂົ້ວໄຟຟ້າ, DC MCB ແລະ DC MCCB
DC MCB Selection Questions
ຄຳຕອບດ່ວນສຳລັບການປຽບທຽບກຸ່ມຜະລິດຕະພັນເບື້ອງຕົ້ນ ກ່ອນການກວດສອບວົງຈອນຢ່າງລະອຽດ.
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.
ຂົ້ວໄຟຟ້າມີຄວາມສຳຄັນບໍ່?
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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