EATON FRBMM-B20/3/003-A 20A 30mA 3-Pole RCBO Type A Characteristic B

This 3-pole RCBO delivers combined residual current protection (Type A, 30 mA) and overcurrent protection (characteristic B, 20 A) in a compact 4-module DIN rail unit. It reliably safeguards circuits against earth fault currents and overloads, ensuring safety for people and equipment in residential and commercial installations.

Advantages

Integrated residual current and overcurrent protection in one device saves space and simplifies installation. The Type A residual current detection covers AC and pulsating DC fault currents, while the B characteristic handles moderate inrush loads. High 6 kA switching capacity and energy limitation class 3 ensure robust performance under fault conditions.

Suitable for

• Protection of socket outlet circuits in residential and commercial buildings
• Circuits with moderate inrush currents, such as lighting and small motors
• Installations requiring combined RCD and MCB functionality in a single module
• DIN rail distribution boards with limited space

Key specifications

• Rated current: 20 A
• Rated residual current: 30 mA
• Number of poles: 3
• Tripping characteristic: B
• Residual current type: A
• Rated voltage: 400 V AC
• Rated switching capacity: 6 kA
• Frequency: 50/60 Hz
• Mounting: DIN rail
• Module width: 4 units
• Degree of protection: IP20 (terminals), IP40 (front)
• Terminal capacity: 1.5–25 mm² solid, 1.5–16 mm² flexible
• Energy limitation class: 3
• Standards: IEC/EN 61009-1
• Ambient operating temperature: -25 to +40 °C
• Test button: Yes

Recommendations

For reliable protection of three-phase circuits, pair with a suitable distribution board and ensure proper torque on terminals. Regular testing via the test button is advised to maintain safety.