Mini Circuit Breaker(MCB)
DZ47Z-63 Solar MCB
The DZ47Z-63 Solar MCB is a DC miniature circuit breaker designed for over-current protection in direct current control...
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Industry Application
Solar PV and Battery Systems
DC strings, combiner boxes and battery circuits cannot be protected with an ordinary AC breaker. The DZ47Z-63 series is specified for DC 12V to DC 1000V with a 4.5kA ultimate breaking capacity and 1200V DC rated insulati
The Situation
What Makes This Sector Different
DC strings, combiner boxes and battery circuits cannot be protected with an ordinary AC breaker. The DZ47Z-63 series is specified for DC 12V to DC 1000V with a 4.5kA ultimate breaking capacity and 1200V DC rated insulation, which is what a PV installer needs on the DC side.
Pain Points
What Goes Wrong Today
- An AC rated MCB cannot extinguish a DC arc reliably
- String faults are hard to isolate without a dedicated DC device
- Installers hold two supply chains, one for AC distribution and one for DC protection
- Combiner boxes need compact DIN devices rated to the full string voltage
Requirements
What The Specification Needs
- DC rated miniature circuit breakers up to 1000V DC
- Pole options to break both poles of a string
- Isolation for maintenance on live arrays
- Surge protection on the DC and AC sides of the inverter
Typical Scenarios
Where These Devices Go
Rooftop PV string protection in a combiner box
Covered by the products listed below.
Battery bank isolation in storage cabinets
Covered by the products listed below.
DC control circuits inside inverter panels
Covered by the products listed below.
Off grid systems where an installed breaker must be reset locally
Covered by the products listed below.
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How an Order Runs
From Enquiry to Delivered Devices
- EnquirySend the board schedule or model list with ratings and quantities.
- Model listWe return a line by line quotation naming the standard for each model.
- SampleA sample order is paired and installed before the main run.
- ProductionApproved models are produced, including any ODM branding.
- PackingCartons are marked to your specification.
- ShipmentDocuments and shipment are arranged with your forwarder.
FAQ
Solar PV and Battery Systems Questions
What DC voltage does the solar MCB cover
DC 12V to DC 1000V with rated insulation voltage of 1200V DC.
What breaking capacity is available on the DC side
The ultimate breaking capacity is 4.5kA with 100 percent service breaking capacity.
Can an ordinary AC MCB be used on a PV string
No. Use the DC rated series. AC devices are not specified for the sustained arc a DC fault produces.
Which poles should be broken on a string
That depends on the array earthing arrangement. Send us your single line diagram and string voltage and we will advise on the pole count.
Talk to Us About Solar PV and Battery Systems
Send the application detail and we will point at the models that fit rather than the whole catalogue.