● Standard: IEC61009-1, IEC62423
● Type: B HP residual current protection for heat pump and inverter-based systems
● Rated current: 6~40A
● Rated voltage: 230/240V~
● Number of poles: 2P(1P+N)
● Rated Sensitivity: 30mA
● Rated breaking capacity: 10kA
● Tripping curve: B, C
● Ambient air temperature: -25...+55 ºC
● Connection: From bottom
EKL17-40BHP Type B HP RCBO is engineered to provide advanced circuit protection for heat pumps, inverter-driven equipment and modern residential or commercial electrical installations. Designed according to IEC/EN 62423 and IEC/EN 61009-1, this device is compliant with BS 7671 requirements for heat pump applications, making it a reliable choice for installations where DC residual currents and high-frequency leakage may occur.
Unlike standard residual current devices, the EKL17-40BHP is capable of detecting residual AC currents, pulsating DC currents and smooth DC currents. Its Type B HP design is optimized for heat pump circuits, where inverter technology can generate high-frequency switching noise. The device is designed to tolerate switching noise of 20kHz and above, helping to prevent unwanted tripping while maintaining reliable protection.
With a single-module 1P+N design, switched neutral, 30mA rated sensitivity and 10kA short-circuit breaking capacity, the EKL17-40BHP combines safety, performance and space-saving installation. It is suitable for DIN rail mounting and supports cable or pin-type busbar connections.
What is a Type B HP RCBO?
A Type B HP RCBO is a residual current circuit breaker with overcurrent protection designed to detect AC, pulsating DC and smooth DC residual currents. The HP version is optimized for heat pump and inverter-based applications where high-frequency leakage may occur.
Why is Type B HP protection recommended for heat pumps?
Modern heat pumps often use inverter technology, which can generate DC residual currents and high-frequency leakage. A Type B HP device helps provide suitable residual current protection while reducing unwanted nuisance tripping.
What standards does the EKL17-40BHP comply with?
The EKL17-40BHP is designed according to IEC/EN 62423 and IEC/EN 61009-1, and is suitable for heat pump applications requiring compliance with BS 7671.
What rated currents are available?
The EKL17-40BHP is available in 6A, 10A, 16A, 20A, 25A, 32A and 40A versions, with B curve and C curve options.
Is the EKL17-40BHP suitable for DIN rail installation?
Yes. The EKL17-40BHP is designed for mounting on a standard 35mm DIN rail, making it suitable for consumer units and distribution boards.
| Product Model | EKL17-40BHP |
| Product Type | Type B HP RCBO |
| Standards | IEC/EN 62423, IEC/EN 61009-1 |
| Poles | 1P+N, single module, switched neutral |
| Rated Voltage | 230/240V~ |
| Rated Frequency | 50/60Hz |
| Rated Current | 6A, 10A, 16A, 20A, 25A, 32A, 40A |
| Rated Sensitivity | 30mA |
| Rated Breaking Capacity | 10kA |
| Residual Current Type | Type B HP |
| Tripping Curves | B Curve, C Curve |
| Residual Current Off-Time | ≤0.1s |
| Rated Residual Making and Breaking Capacity | 500A |
| Insulation Voltage | 500V |
| Impulse Withstand Voltage | 4kV |
| Dielectric Test Voltage | 2kV, 50/60Hz, 1 min |
| Electrical Life | 4,000 cycles |
| Mechanical Life | 10,000 cycles |
| Protection Degree | IP20 |
| Ambient Temperature | -25℃ to +55℃ |
| Installation | 35mm DIN rail |
| Incoming Method | From bottom |

