Product Category


Residual current device sensor HYCA-03 type

  • Small volume and footprint for integration into compact IC-CPD.
  • Avoids hazardous situations with DC fault currents.
  • Protects RCCB type A from saturation.
  • Saves costly type B RCCD.
    Volume optimized.
  • AC/DC-current sensitivity at low cost.
  • Protects RCCB type A from saturation.
  • Self-monitoring and test functions.
  • Robust mechanical design suitable for IC-CP.

Residual current device sensor (RCDs) or residual current sensors are indispensable safety components used to protect against electrical and ground faults in a variety of applications. Their high sensitivity, fast tripping mechanisms and compatibility with a variety of electrical systems make them vital for ensuring electrical safety in residential and industrial environments and preventing accidents and damage.

Standards and Regulations:
Residual current device sensor are subject to various national and international standards and regulations that define their installation requirements and performance standards. HYCA-F03 complies with IEC62752, IEC62955, UL2231 standards.


Safety: RCDs are primarily safety devices designed to prevent electric shock, electrical fire, and equipment damage. They continuously monitor circuits for current imbalances, detecting ground faults and residual current leakage.

Trip Mechanism: When a ground fault or leakage of electricity to ground is detected, the RCD trips and interrupts the circuit, stopping the current flow. This action is rapid, usually within milliseconds, to prevent accidents.

Sensitivity: Residual current device sensor are highly sensitive and can detect even small current imbalances (usually in the milliamp (mA) range), ensuring early detection of faults.

Compatibility: They can be integrated into a variety of electrical installations, including residential, commercial and industrial systems. Different sensitivity settings are available to suit different applications.

Self-testing: Some modern Residual current device sensor include self-testing mechanisms to ensure their continued functionality. They test themselves periodically and trip if not functioning properly.

Resilience: Residual current device sensor are designed to operate reliably even in harsh environmental conditions, making them suitable for outdoor and industrial applications.


Electric Vehicle (EV) Charging: Residual current device sensor are critical in EV charging infrastructure to prevent ground faults, leakage, and shock hazards during the charging process. They are often integrated into residential and public charging stations.

Residential Wiring: In residential applications, RCDs are often used to protect individuals and equipment from electrical faults. They are often installed in electrical panels to protect circuits in kitchens, bathrooms and outdoor areas.

Industrial and Commercial Facilities: RCDs play a vital role in industrial and commercial settings, protecting people and equipment from electrical faults. They are used in manufacturing facilities, construction sites, and large commercial operations.

Boats and Marines: RCDs are installed on boats and vessels to protect against electric shock in wet and conductive environments.

Outdoor Events: RCDs are used for temporary electrical installations at outdoor events such as music festivals and expos to ensure the safety of event attendees and personnel.

Renewable energy systems: In photovoltaic (solar) and wind power systems, RCDs are used to detect and respond to ground faults, maintaining the safety of the system and maintenance personnel.

Pools and Spas: Residual current device sensor are used to protect against electrical shock hazards in and around swimming pools and spas.

Model Corresponding standards DC trigger threshold AC trigger threshold
HYCA-03/PD IEC62752 6mA 30mA
HYCA-03/MD IEC62955 6mA /
Absolute maximum ratings (not operating)
Electrical data Symbol Unit Specification Conditions
Load dump vervoltage UC V 32 400ms
Over-voltage UC V 25 1 minute
Reverse polarity UC V -16 1 minute
Minimum supply voltage UCmin V 6 Continuous not operating
Maximum supply voltage UCmax V 18 Continuous not operating←
Creepage distance dcp mm 7.2
Clearance dci mm 6.9
RMS voltage for AC insulation test Ud KV 2.5 50HZ, 1minute
Insulation resistance Rins 500 500 V    iso 16750-2



Residual current device sensor HYCA-03 type-heyi

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