The New and Exclusive Low-cost RCD Sensor is Now Available!

Low-cost RCD (residual current protective device) sensors, commonly known as residual current monitors (RCMs), are integrated devices that offer a more cost-effective alternative to Type B RCDs in applications such as electric vehicle charging. These sensors are designed to detect both AC and DC leakage currents, typically triggering an alarm at 30mA AC leakage current and 6mA DC leakage current. Key features include compact size, high sensitivity, high integration, and compliance with safety standards such as IEC 62955.

The MD0630STA-PM AC/DC leakage current sensor (compatible with Type A and Type B) offers high sensitivity, accurate measurement, and a compact, integrated design. It also features a self-test function. Its outstanding features are its ultra-small size and ultra-low price (Type B quality, Type A price), but its aperture is smaller.

Key Features and Benefits

Integrated Design: Many low-cost RCMs combine AC and DC leakage current detection functions into a single unit, offering a more compact and cost-effective solution compared to using a separate Type A RCD with the additional DC leakage current detection component.

AC and DC Protection: They are specifically designed to detect both pulsating and smooth DC leakage currents, which are critical for modern electric vehicle (EV) charging, as DC leakage current can saturate the magnetic core of a standard Type A RCD, causing it to fail.

Cost-effective: These sensors integrate functions typically found in more expensive Type B residual current devices (RCDs), enabling compliance with safety standards at a lower cost.

High sensitivity: They can detect DC leakage currents as low as 6mA and AC leakage currents as low as 30mA, sometimes even at higher frequencies, ensuring a high level of protection.

Safety compliance: Many models comply with international safety standards required for electric vehicle charging equipment, such as IEC 62955.

Widely applicable: They are not only commonly used in electric vehicle charging stations and in-cable protective devices (IC-CPDs), but can also be used in other applications where AC and DC leakage risks exist, such as solar inverters, medical equipment, and industrial machinery.

Self-monitoring: Some sensors have built-in self-test functions to ensure proper operation.