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DC Circuit Breaker 550-1000 V

Keep your high-voltage DC setup safe and running smoothly with the Voltford DC Circuit Breaker. Built specifically for demanding applications like large solar PV arrays and modern energy storage systems, this breaker steps in to protect your equipment when things go wrong. It quickly and reliably cuts off fault currents, helping prevent damage to inverters, batteries, wiring, and other expensive components. Whether you’re working with 550 V or pushing up to 1000 V, it delivers consistent performance across the full range.

What sets it apart:

  • Advanced arc extinguishing technology for clean, fast interruptions—even under high DC loads
  • Impressive breaking capacity to handle serious short-circuit events
  • Tough, long-lasting construction designed to thrive in harsh outdoor or industrial environments
  • Full compliance with international electrical standards, so you can install with confidence
Brand Suntree
Product DC Circuit Breaker 550-1000 V
Part Number SL7N-63
Rated insulation voltage (Ui) 1250V
Rated service voltage (Ue) DC(1P):15V,60V,100V,180V,250V; DC(2P):125V,375V,550V,600V,800V
DC(3P):750V,800V; DC(4P):800V,1000V 1200V
Rated current of current shell frame 63A
Different currents In the same current shell frame 6A,10A,16A, 20A, 25A,32A, 40A,50A, 63A
Rated service short-circuit breaking capacity Ics=Icu lcs=Icu=6kA(2P800V/4P1200V Ics=Icu=2KA)
Mechanical life 8500 Times
Electrical life 1500 Times (< DC125V/1P, < DC250V/2P)
1000 times (other voltage specifications)
Certificate CB, CE, TÜV Nord
Rated impulse withstand voltage Uimp 6kV
Trip characteristics I trip type B/C
Overvoltage category
Class of pollution 3
Ingress protection IP40; terminal IP20
Resistance to heat and humidity Class 2
Relative humidity ≤95%
Standards compliant IEC 60947-2 GB/T 14048.2
Shock resistance According to IEC60068-2-6
Mechanical shock resistance parameters According to IEC60068-2-27
Service ambient temperature -30℃~70℃
IEC60068-4Resistance to heat and humidity(IEC60068-4) Class Db (temperature 55℃ 6 cycles)
Storage ambient temperature -40℃~85℃
Altitude ≤2000m
Weight accessories 0.12kg/P
Accessories OFISD/MX/MN/MX+OF
Max control voltage Us DC:12V,24V,220V; AC:110V,220V,380V power supply recommended not less than 75W
MN rated voltage Un AC220V AC380V

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