The residual current circuit breaker type A/AC PR8NM is an electrical safety device that disconnects a circuit when it detects that the current leaving is not equal to the current entering. It is used to protect people from electric shock, while limiting damage to devices and the risk of fire. Ideal for use in construction and industry.

Technical characteristics:

• Type: A
• Rated current: 40A
• Rated residual current IΔn: 300mA
• Residual current breaking capacity: 500A
• Response time: 0.1 s
• Impulse withstand voltage U imp: 6000V
• Short-circuit withstand capacity Inc: 6000A
• Pollution degree: 2
• Rated voltage Ue: 400V
• Rated insulation voltage Ui: 500V
• Current frequency Hz: 50/60
• Electrical life: 4000 operations
• Mechanical life: 4000 operations
• Operating position indicator: yes
• Protection degree: IP20
• Storage temperature: -30/+70°C
• Operating temperature: -30/+50°C
• Maximum connecting cable cross-section: 25 mm²
• Terminal tightening torque: 3 Nm
• Connection via comb busbars: yes

The switch has a TEST button to verify the correct internal operation of the device, which should be checked every 30 days.