
Top rated Residual-current devices
Here's a ranking of the top rated products in this category. To give you a quick overview, we've also added some key information about the products.
1. Steffen FI adapter
With the versatile FI plug (available optionally) and the mobile FI adapter, you are safely protected. These residual current devices detect alternating and pulsating direct currents and compare the incoming and outgoing currents. If there is a deviation of more than 30 mA, the supply line is disconnected from the network within milliseconds. The FI devices prevent life-threatening electric shocks that can occur due to faults in wiring and equipment. They are ideal for use with electric garden tools, Christmas lighting, workshop tasks, and more. High cold tolerance down to -25 °C, with undervoltage release.

2. Brennenstuhl Personal protection FI connector
The effective protection against electrical accidents disconnects the active conductors from the mains at lightning speed as soon as differential currents occur. The personal protection plug is suitable for fixed installation and as permanent additional equipment for frequently used electrical appliances. It is also suitable for outdoor use and features bipolar shutdown.
For function control, occasionally press the test button and perform a function check. Switch on the personal protection plug again after a power interruption.
Rated voltage: 230V
Mains frequency: 50Hz
IAN: 30mA
Trip time max.: 30ms
Power input: max. 2300W
Rated current: 10A
Max. permissible short-circuit current: 500A
Ambient temperature: -25°C to +40°C
Protection class: I
Protection class: IP54.

3. Hager FI-LS 1P+N
The FI-LS 1P+N from Hager is a highly advanced residual current circuit breaker that offers both safety and reliability in electrical installations. With a tripping characteristic of type C and a rated current of 13 A, this switch is ideal for protecting electrical lines and devices from overload and short circuits. The switch is designed for mounting on DIN rails and features a fault position indicator that allows for easy identification of faults. The FI-LS 1P+N provides a residual current monitoring of 30 mA, making it an excellent choice for applications where the protection of people and devices is of utmost importance. Its compact design and the ability to position the neutral conductor on the right facilitate installation and integration into existing systems. This switch is an essential component for modern electrical installations that require the highest safety standards.
- Residual current monitoring of 30 mA for enhanced personal protection
- Tripping characteristic type C for reliable overload protection
- Compact design for easy mounting on DIN rails
- Fault position indicator for quick identification of disturbances
- Switching neutral conductor for improved safety.

4. Hager CDA440D
Hager RCD CDA440D
Manufacturer: Hager
Designation: 4-pole RCD 40A/30mA, 6kA
Type: CDA440D
Number of poles: 4
Rated voltage: 400 V
Rated current: 40 A
Rated residual current: 0.03 A
Rated insulation voltage Ui: 500 V
Rated impulse voltage withstand Uimp: 4 kV
Power loss: 6.5 W
Mounting type: DIN rail
Residual current type: A
Selective type: no
Time-delayed type: no
Short-circuit strength (Icw): 6 kA
Surge current strength: 0.25 kA
Voltage type: AC
With locking device: yes
Frequency: 50 Hz
Additional devices possible: yes
Protection class (IP): IP20
Width in division units: 4
Installation depth: 70 mm
Ambient temperature during operation: -25..40 °C
Degree of pollution: 2
Connectable conductor cross-section multi-stranded: 1..16 mm²
Connectable conductor cross-section single-stranded: 1..25 mm²
RAL number (similar): 7005
Explosion-proof: no
Hager RCD CDA440D: additional details
4-pole residual current circuit breaker 6kA 40A 30mA Type A. Residual current circuit breaker (RCD) according to DIN EN 61008-1 (VDE 0664-10), DIN EN 61008-2-1 (VDE 0664-11) with Bi-Connect terminals at the bottom, external blue test button, and residual current indicator. Suitable for retrofitting additional devices. Connection terminals with wire insertion protection, labeling option directly on the device.

5. Hager CDA640D
Hager Residual Current Circuit Breaker CDA640D
Manufacturer: Hager
Designation: Residual Current Circuit Breaker 4p 10kA 40A 30mA A
Type: CDA640D
Number of Poles: 4
Rated Voltage: 400 V
Rated Current: 40 A
Rated Residual Current: 0.03 A
Rated Insulation Voltage Ui: 500 V
Rated Impulse Voltage Resistance Uimp: 4 kV
Power Loss: 4.39 W
Mounting Type: DIN Rail
Residual Current Type: A
Selective Type: No
Short-Time Delayed Type: No
Short-Circuit Strength (Icw): 10 kA
Surge Current Strength: 3 kA
Voltage Type: AC
With Locking Device: Yes
Frequency: 50 Hz
Additional Devices Possible: Yes
Protection Class (IP): IP20
Width in Division Units: 4
Installation Depth: 70 mm
Ambient Temperature During Operation: -25..70 °C
Degree of Pollution: 2
Connectable Conductor Cross-Section Multi-Wire: 1..16 mm²
Connectable Conductor Cross-Section Single-Wire: 1..25 mm²
RAL Number (Similar): 7005
Explosion-Proof: No
Hager Residual Current Circuit Breaker CDA640D: Additional Details
4-pole residual current circuit breaker 10kA 40A 30mA Type A. Residual current protective switch (RCD) according to DIN EN 61008-1 (VDE 0664-10), DIN EN 61008-2-1 (VDE 0664-11) with Bi-Connect terminals at the bottom, external blue test button, and residual current indicator. Suitable for retrofitting additional devices. Connection terminals with wire insertion protection, labeling option directly on the device.

6. Hager CDH640D
The Hager CDH640D is a highly advanced residual current circuit breaker designed for use in electrical installations. With a rated current of 40 A and a short-circuit withstand rating of 10 kA, this 4-pole RCD provides reliable protection against fault currents. It meets the requirements of DIN EN 61008-2-1 and VDE 0664 Part 10 + 11, making it a safe choice for various applications. The switch is equipped with touch protection of protection class IP2x, ensuring additional safety. Installation is straightforward on a DIN rail, and the retrofitting of additional devices can be done without tools. The terminal blocks are equipped with a wire insertion protection, which facilitates installation and enhances safety. Additionally, the switch features an external test button for easy functionality checks.
- Type HI with a tripping characteristic A
- Suitable for AC/DC applications
- Tool-free installation for additional devices
- Labeling option directly on the device
- VDE tested for extra safety.

7. Hager CDA663D
The Hager CDA663D is a highly advanced residual current circuit breaker designed for use in electrical installations. With a rated current of 63 A and a type A tripping characteristic, this 4-pole RCD provides reliable protection against fault currents up to 30 mA. It meets the requirements of DIN EN 61008-2-1 and VDE 0664 Part 10 + 11, making it a safe choice for various applications. The circuit breaker is suitable for mounting on a DIN rail and allows for easy installation without tools, enhancing usability. The connection terminals are equipped with wire-insertion protection to increase safety during installation. Additionally, the CDA663D features an external test button for quick functionality checks. With its robust construction and high safety standards, this RCD is a valuable addition to any electrical system.
- 4-pole residual current circuit breaker with 10 kA
- Suitable for retrofitting additional devices
- Wire-insertion protection on the connection terminals
- External test button for easy functionality testing
- Protection class IP20 for additional touch protection.

8. Hager CDA440DY
The Hager CDA440DY is a highly advanced residual current circuit breaker designed for use in electrical installations. With a 4-pole design, it provides a reliable protection solution against fault currents that can be potentially dangerous. The switch has a rated current of 40 A and a rated residual current of 30 mA, making it ideal for protecting people and installations in residential and commercial buildings. Installation is straightforward on a DIN rail, facilitating easy setup in distribution cabinets. The CDA440DY is rated for an insulation voltage of up to 500 V and offers a high tripping characteristic, ensuring a quick response to fault currents. With an IP20 protection rating, it is suitable for use in dry indoor environments. This residual current circuit breaker is an essential element for the safety of electrical systems.
- 4-pole design for comprehensive protection
- Rated current of 40 A for versatile applications
- Quick response to fault currents thanks to high tripping characteristic
- Easy installation on DIN rail for hassle-free setup
- Suitable for use in dry indoor environments with IP20 protection rating.

9. Hager FI / LS 4P 6kA C-16A 30mA A
The residual current circuit breaker from Hager is a reliable device that functions both as a circuit breaker and as a residual current protection switch. With a rated voltage of 400 volts and a rated current of 16 amperes, this switch provides an effective solution for protecting electrical installations. The Type A residual current protection ensures safe monitoring of fault currents up to 30 milliamperes, while the tripping characteristic C allows for a delayed response to overloads. The switch is designed for mounting on DIN rails and features four poles, making it ideal for various applications. The integrated residual current indicator allows for easy checking of the device's status, while the fault location indication supports precise problem localization. With a robust design and an IP20 protection rating, this residual current circuit breaker is suitable for both private and commercial use.
- Type A residual current protection for enhanced safety
- Integrated residual current indicator for easy checking
- Suitable for mounting on DIN rails
- Delayed tripping characteristic (Type C) for overload protection
- Fault location indication for precise problem localization.

10. Hager FI/LS switch
Residual current circuit breaker according to DIN EN 61009-1 (VDE 0664-20) with QuickConnect terminal, up to 20 A at the feeder and up to 63 A at the feeder, blue test button and residual current indication. Simple individual removal from the phase busbar system. Suitable for retrofitting of additional equipment. Labeling option directly on the device.
