
Best selling Residual-current device
Here's a ranking of the best 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. Schneider Electric Residual current circuit breaker
The residual current circuit breaker from Schneider Electric, model A9D56616, is a highly advanced device that functions both as a residual current device (RCD) and as a circuit breaker (MCB). With a rated current of 16 A and an earth fault sensitivity of 30 mA, this switch provides comprehensive protection for final circuits against overloads and earth faults. It is designed for use in alternating current applications with a rated voltage of 230 V and meets the requirements of the EN 61009 standard. The switch is suitable for mounting on a DIN rail and features a compact design that allows for easy installation. Its robust construction ensures high reliability and durability, while the IP20 protection rating makes it suitable for use in dry indoor environments. The A9D56616 is an essential component for the safety of electrical installations and offers an effective solution to prevent electrical accidents.
- Combination of residual current protection and overload protection
- Earth fault sensitivity of 30 mA for enhanced safety
- Robust design with IP20 protection rating
- Suitable for mounting on DIN rails
- Complies with the EN 61009 standard for safety and reliability.

3. 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.

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 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.

6. Hager FI/LS 4Pol. 3P+N 20A/30mA
The Hager FI/LS 4Pol. 3P+N 20A/30mA is a combined residual current and overload protection switch that offers protection against both overload and fault currents. With a rated voltage of 400 V and a tripping characteristic of class C, this device is ideal for applications that require robust and reliable protection. The switch is designed for mounting on a DIN rail and features a compact design that allows for easy installation. A test button and a fault current indicator through a blue display window provide additional safety and user-friendliness. The FI/LS switch is suitable for use in various electrical systems and offers a high rated insulation voltage of 500 V, making it a versatile choice for different applications.
- Combined protection switch for overload and fault currents
- Test button for easy functionality check
- Fault current indication through blue display window
- Mounting on DIN35 rail for easy installation
- High rated insulation voltage of 500 V.

7. Hager HAG ADS963D
The HAG ADS963D Fi-LS 1P+N 6kA C-13A 30mA Type A QC from Hager is a highly developed residual current circuit-breaker that offers protection against both overload and residual currents. With a rated current of 13 A and a rated residual current of 30 mA, this device is ideal for use in residential and commercial installations. The switch is equipped with a QuickConnect terminal for quick and easy installation. It fulfils the requirements of DIN EN 61009-1 and offers a high level of contact protection in accordance with DIN VDE 0106 Part 100. The blue test button and the residual current indicator ensure user-friendly handling and safety. In addition, the labelling option directly on the device enables clear marking, which makes maintenance and identification easier.

8. 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.

9. ABB SMISSLINE FI/LS switch 3LN, 13A, 30mA
The SMISSLINE FI/LS switch from ABB is a highly advanced residual current device that provides both overload protection and earth fault protection. With a rated current of 13 A and a rated residual current of 30 mA, this switch is designed for use in various electrical applications. It is 4-pole and suitable for a rated voltage of 400 V, making it a reliable choice for protecting electrical installations. The switch is designed for frequencies of 50/60 Hz and features a type C tripping characteristic, ensuring a quick response to overload conditions. Installation is straightforward on a DIN rail, facilitating its use in distribution cabinets. With an IP20 protection rating, the switch is suitable for use in dry indoor environments and offers a robust solution for protection against electrical faults.
- 4-pole for comprehensive protection
- Type A residual current for enhanced safety
- Type C tripping characteristic for quick response
- Suitable for frequencies of 50/60 Hz
- Easy installation on DIN rail.

ABB SMISSLINE FI/LS switch 3LN, 13A, 30mA
10. Eaton FI/LS combination, 16 A, 300 mA, LS- 120668
The FI/LS combination from Eaton is a reliable and safe protective switch designed for both personal safety and machine and insulation protection. With a rated current of 16 A and a rated residual current of 300 mA, this device offers an effective solution for residential and commercial buildings. The combination of residual current and circuit breakers allows for compact installation on a DIN35 rail and is equipped with a test button and a tripping indicator to verify functionality. The delayed characteristic "C" ensures that the switch does not trip during short-term overloads, making it ideal for applications with high inrush currents. The installation is straightforward and user-friendly, facilitating the work for professionals.
- Combined residual current and circuit breaker for comprehensive protection
- Test button and tripping indicator for easy functionality check
- Delayed tripping characteristic "C" for high inrush currents
- Suitable for installation on DIN35 rail
- Protection class IP20 for indoor use.
