Thermal-magnetic circuit breaker JB

thermal-magnetic circuit breaker
thermal-magnetic circuit breaker
thermal-magnetic circuit breaker
thermal-magnetic circuit breaker
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Electrical characteristics
short-circuit, overload, DC, over-voltage
for DC applications, for photovoltaic applications, for power generation installations
Number of poles
single-pole, 3-pole, 2-pole, 4-pole
Other characteristics
DIN rail, miniature, indoor, fixed, modular
Primary current

10,000 A


250 V, 500 V, 750 V, 1,000 V


Max.: 63 A

Min.: 1 A


DC Circuit Breaker - Miniature Circuit Breakers for DC and Solar Generation 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. 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 NOTES 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 be inverted without any risk. 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.


*Prices are pre-tax. They exclude delivery charges and customs duties and do not include additional charges for installation or activation options. Prices are indicative only and may vary by country, with changes to the cost of raw materials and exchange rates.