1P Circuit Breakers for Solar photovoltaic

  • The JB is a DC circuit breaker dedicated to multi string photovoltaic installations.
    JB is not polarity sensitive: (+) and (-) wires can inversed without any risk.
    Compliance with standards: multistandard IEC 60947-2, EN60947-2, GB 14048.2
    • Operating voltage: 12...1000VDC
    • Number of poles: 1P, 2P, 3P, 4P
    • Rating: 1 to 63 A
    • Breaking capacities: 5 to 10 kA depending on the standard
    • Tripping curve: C, D, K
    • Suitable for isolation in accordance with industrial standards: IEC 60947
    • Multiple possibilities of connecting: box lug, ring tongue terminal...


The JB is a DC circuit breaker dedicated to multi string photovoltaic installations.
This circuit breaker is designed to protect the cables located between each string of photovoltaic modules and the photovoltaic inverter against overloads and short circuits (see application diagram).
Combined with a switch , the JB will be installed in a string PV protection enclosure at the end of each string of photovoltaic modules.
It can be locked (by a padlocking device) in OFF position as a safety measure for removal of the PV inverter.
Since a fault current can flow in the reverse direction to the operating current, the JB can detect and protect against any bidirectional current.
To ensure the safety of the installation, it is necessary, depending on the various types of application, to combine the JB with:

  • a residual current device at the AC end,
  • a fault passage detector (insulation monitoring device) at the DC end
  • an earth protection circuit breaker at the DC end

In all cases, fast action on site will be required to clear the fault (protection not ensured in the event of a double fault).
JB is not polarity sensitive: (+) and (-) wires can inversed without any risk.
The JB is: delivered with three inter-pole barrier to provide increased isolation distance between two adjacent connectors.

Typical Applications:

Main characteristics
Operating voltage (Ue) 1P=250 V DC, 2P=500 V DC
3P=750 V DC, 4P=1000 V DC
Rated insulation voltage (Ui) 1,000 V DC
Breaking capacity (Icu) 10 kA
Impulse voltage (Uimp) 4 kV
Electrical connection By the bottom for In and Out
Number of poles 1P, 2P, 3P, 4P
Standards IEC 60947-2
EN 60947-2

Technical Data:

■ Position contact indication - suitability for isolation according to IEC/EN 60947-2 standard.
■ The presence of the green strip guarantees physical opening of the contacts and allows operations to be performed on the downstream circuit in complete safety.
■ Increased product service life thanks to fast closing independent of the speed of actuation of the toggle.
■ Pre-wired product: Input / Output on the same side.

Main characteristics
Rated service breaking capacity (Ics) 100 % of the Icu
Endurance (O-C) Electrical 1,500 cycles (where L/R=2 ms)
Mechanical 20,000 cycles
Mechanical 20,000 cycles
Degree of pollution 2
Category A (no delay in accordance with IEC / EN 60947-2 standards)
Degree of protection Device in modular (IEC 60529) enclosure IP40
Tropicalisation Relative humidity: 95 % at 55°C in accordance with IEC 60068-2 and GB 14048.2 standards
Temperature Operating -25°C to 70 °C
Storage -40°C to 85°C

DC Rated Circuit Breakers


1.E-packet,China post,USPStracking will show on the internet in 4-6 days,it is somewhat slow at least it will take13-25 days to reach USA.

2.Fedex,DHL,TNT will show on the internet at once and it will reach in 7 days.