MD0630STA-PM AC/DC Residual Current Sensor for EV Charging Applications

Reliable AC/DC Leakage Current Detection for EV Charging Equipment

As electric vehicle adoption expands across Europe, the demand for safe and reliable charging infrastructure continues to grow. 

EV charging equipment must be designed to address electrical hazards, including residual currents that may occur because of insulation faults or other abnormal operating conditions.

The IVY MD0630STA-PM AC/DC residual current sensor is designed to detect AC and DC residual currents and provide an alarm signal to an external control circuit. 

With DC residual current alarm thresholds of 3–6mA and AC alarm thresholds of 15–30mA, this sensor can support the residual current detection functions of EV charging equipment when integrated into a properly designed and validated protection system.

Its integrated construction, low-voltage power supply and built-in self-test function make it a practical component for equipment manufacturers developing EV charging and electrical safety solutions.

Key Features of the MD0630STA-PM

1. AC and DC Residual Current Detection

The MD0630STA-PM is designed to detect both AC and smooth DC residual currents. 

This capability is relevant to EV charging applications, where power electronics can introduce different types of residual current depending on the circuit topology and fault conditions.

The specified alarm thresholds are:

• DC residual current: 3–6mA

• AC residual current: 15–30mA

These values describe the sensor's specified alarm thresholds. 

Actual detection performance must be verified against the applicable test conditions and the requirements of the finished equipment.

2. Built-In Self-Test Function

A reliable residual current monitoring system needs a way to check whether its sensing function is operating as expected.

The MD0630STA-PM includes a dedicated self-test input. 

When a 5V DC signal is applied to the ST pin under the specified test conditions, a functioning sensor provides a low-level output signal through the DA pin.

This function helps the host system check sensor operation. 

The self-test should be performed according to the manufacturer's instructions, with the monitored circuit de-energised as specified in the product documentation.

3. Open-Collector Alarm Output

The sensor provides an open-collector output for AC/DC residual current alarms and self-test feedback.

According to the product specification, the output can be pulled up to an external voltage between 3V and 25V, with the pull-up resistor selected for the circuit design. 

The output current must not exceed 100mA.

This interface gives equipment designers flexibility when connecting the sensor to a controller or monitoring circuit. 

Correct interface design must account for the host circuit's voltage, current limits and logic requirements.

4. Wide Operating Temperature Range

The MD0630STA-PM has a specified operating temperature range of -25°C to +80°C.

This range may be relevant to charging equipment installed in different environmental conditions. 

The temperature limits of the complete product, including its enclosure, wiring and associated electronics, must also be considered during system design.

5. Compact Integrated Construction

The sensor uses an integrated structure with a plastic housing specified as flame-retardant grade V-0 in the product documentation.

Its integrated design can simplify component integration into electrical equipment. 

OEM engineers should confirm the mechanical dimensions, conductor arrangement, installation clearances and applicable insulation requirements using the official drawing and datasheet.

Technical Specifications

Note: These are product-level specifications. 

Confirm the detailed detection characteristics, output polarity, electrical limits and installation requirements in the latest official datasheet.

Applications of an AC/DC Residual Current Sensor

EV Charging Stations and EVSE

Electric vehicle supply equipment is a key application for AC/DC residual current detection. 

Depending on the charger architecture, residual current monitoring may be required to support the equipment's protective functions.

The MD0630STA-PM can be evaluated as a sensing component in EVSE designs that require AC and smooth DC residual current detection. 

The complete charging system must implement the appropriate protective measures and meet all applicable requirements.

AC EV Chargers

AC charging equipment includes electrical and electronic components that must be considered when designing protection against residual current faults.

An AC/DC sensor can support monitoring functions within a suitable protection architecture. 

Engineers should confirm that the sensor's thresholds, response characteristics and output interface match the requirements of the charger and its protective devices.

DC-Related Charging and Power Electronics

Power converters and switching electronics can create residual current conditions that differ from conventional AC-only systems.

The MD0630STA-PM's DC detection capability may be relevant to selected applications involving power electronics. 

Suitability must be established against the actual circuit topology, fault scenarios and required protection strategy.

Industrial Electrical Equipment

Beyond EV charging, AC/DC residual current sensors can be considered for selected industrial electrical systems that require residual current monitoring.

The appropriate sensor must be selected according to the monitored current path, expected residual current waveform, alarm threshold and system-level safety requirements.

How Does AC/DC Residual Current Detection Work?

Under normal operating conditions, the currents in the monitored conductors balance according to the circuit design. 

When a leakage path develops, a residual current may appear.

A residual current sensor monitors the relevant conductor arrangement and provides an output when its specified alarm conditions are met. 

The host system can then use this signal within its monitoring or protective control logic.

For the MD0630STA-PM, the product documentation specifies that both the live and neutral conductors of a single-phase circuit should pass through the sensor's central aperture for residual current monitoring.

Correct installation is essential. 

The sensor's alarm output alone should not be assumed to disconnect power or independently provide complete electrical protection. 

The overall system must include the required switching and protective devices.

Self-Test and System Integration

The MD0630STA-PM provides dedicated pins for power, ground, alarm output and self-test.

• VCC: DC supply input, 4.85–5.5V.

• GND: Ground connection.

• DA: Open-collector output for residual current alarms and self-test feedback.

• ST: Self-test input, activated by a 5V DC signal under the specified conditions.

• FT: Factory test pin; not intended for normal user operation.

When the self-test is activated correctly, the DA output provides a low-level signal if the sensor passes the specified internal check. 

Equipment designers should follow the datasheet's test sequence and ensure the monitored circuit is de-energised during self-testing where required.

Stable power and ground connections are important for reliable operation. 

The supply pin must not be shorted to other pins, and suitable electrostatic discharge precautions should be observed during handling and assembly.

What European EVSE Manufacturers Should Consider

For European manufacturers developing charging equipment, sensor selection is only one part of a complete residual current protection design.

Before approving the MD0630STA-PM for production, engineering teams should evaluate:

• Compatibility with the applicable EV charging system architecture.

• Required AC and DC residual current detection thresholds.

• Response times and performance under relevant residual current waveforms.

• Correct installation of monitored conductors through the sensor aperture.

• Output compatibility with the controller and external pull-up circuit.

• Electrical insulation, creepage and clearance requirements.

• Self-test integration and fault-handling logic.

• Applicable product standards and the compliance requirements of the finished equipment.

The product documentation references IEC 62752, IEC 62955 and IEC 62423-related residual current characteristics. 

Such references should be treated as technical design context, not as a claim that the sensor alone is certified or that a complete charging product automatically complies with these standards. 

Request the available test reports and supporting documents from IVY when compliance evidence is required.

Frequently Asked Questions

What types of residual current can the MD0630STA-PM detect?

The sensor is designed for AC and smooth DC residual current detection. 

The specified alarm thresholds are 15–30mA for AC and 3–6mA for DC.

Is the MD0630STA-PM suitable for EV charging equipment?

It can be evaluated for EV charging applications that require AC/DC residual current sensing. 

Final suitability depends on the charging architecture, required protection functions, response characteristics and applicable standards.

What is the supply voltage of the MD0630STA-PM?

The specified DC supply range is 4.85–5.5V.

What type of alarm output does the sensor use?

The sensor uses an open-collector output. The product documentation specifies an external pull-up voltage of 3–25V and a maximum output current of 100mA. 

The external circuit must be designed within these limits.

Does the sensor have a self-test function?

Yes. The sensor includes an ST self-test input. 

Under the specified test conditions, a functioning sensor provides a low-level signal through the DA output. 

Follow the manufacturer's test procedure.

Does the sensor itself disconnect the charging power supply?

The specified DA output provides an alarm signal. It should not be assumed to disconnect power independently. 

The finished equipment must implement the necessary control logic and protective switching devices.

Can the MD0630STA-PM be used in European charging products?

European OEMs can evaluate the sensor against their system requirements. 

Before production, confirm its technical performance, available test documentation and the compliance requirements applicable to the finished charging equipment.

Request Technical Information from IVY

Looking for an AC/DC residual current sensor for your next EV charging or electrical safety project?

Contact IVY to request the MD0630STA-PM datasheet, clarify integration requirements and discuss OEM supply needs.

When making an enquiry, include your target application, required alarm thresholds, controller interface, installation conditions and expected order quantity. This information helps determine whether the sensor is suitable for your design.