Hager CFB640E Type B RCCB 4-Pole 40A 300mA 10kA

Protect your circuits with the Hager CFB640E, a 4-pole residual current circuit breaker (RCCB) engineered for all-current sensitivity (Type B). With a rated current of 40 A and a residual current of 300 mA, it delivers reliable protection against AC, pulsating DC, and smooth DC fault currents—ideal for modern installations with frequency converters, EV charging, or photovoltaic systems. Its 10 kA short-circuit breaking capacity and 4 kV impulse withstand voltage ensure robust performance in demanding environments.

Overview

The Hager CFB640E is a DIN-rail mounted RCCB designed for industrial and commercial applications. It operates at a rated voltage of 400 V AC and a frequency of 50/60 Hz. The device features a rated insulation voltage of 400 V and a rated impulse withstand voltage of 4 kV, ensuring safety and longevity. With a mechanical endurance of over 10,000 cycles and an electrical endurance of over 2,000 cycles, it is built for repeated operation.

What stands out

• Type B sensitivity: Detects all residual current types, including smooth DC, for comprehensive protection.
• High breaking capacity: 10 kA short-circuit rating handles significant fault currents.
• Robust terminals: Accepts rigid conductors from 1.5 to 35 mm² and flexible from 1.5 to 25 mm².
• Wide operating temperature: Functions reliably from -25 °C to 40 °C.
• Compliance: Meets EN 61008-1 standards for residual current devices.

Technical details

• Number of poles: 4
• Rated current (In): 40 A
• Rated residual current (IΔn): 300 mA
• Rated voltage (Un): 400 V AC
• Rated short-circuit breaking capacity (Icn): 10 kA
• Rated insulation voltage (Ui): 400 V
• Rated impulse withstand voltage (Uimp): 4 kV
• Mounting type: DIN rail
• Frequency: 50/60 Hz
• Degree of protection: IP20
• Operating temperature range: -25 °C to 40 °C
• Terminal capacity (rigid): 1.5 - 35 mm²
• Terminal capacity (flexible): 1.5 - 25 mm²
• Electrical endurance: >2000 cycles
• Mechanical endurance: >10000 cycles
• Standards: EN 61008-1

Our verdict

For installations where DC fault currents are a concern, the Hager CFB640E is a dependable choice. Its Type B classification, high breaking capacity, and robust construction make it suitable for a wide range of industrial and commercial applications. With proven endurance and compliance, it offers long-term peace of mind.