Residual Current Sensor Manufacturer

ES201 Series High-Sensitivity Leakage Current Sensor

The ES201 Series Residual Current Sensor is designed for precise detection of earth leakage currents in electrical systems.
It enables reliable monitoring of AC, DC, and pulsating DC residual currents, helping improve electrical safety and system protection.

Engineered for industrial and energy-related applications, the ES201 series offers high sensitivity, stable performance, and compact structure, making it suitable for both new installations and retrofit projects.

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Key Capability Overview

Residual Current Detection Range
• mA-level to A-level leakage current detection (model dependent)
• Supports AC / DC / pulsating DC residual currents

Measurement Performance
• High accuracy with excellent linearity
• Stable output under industrial operating conditions

Design & Integration
• Compact structure for easy system integration
• Suitable for safety-critical applications

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Key Electrical Specifications

This table helps engineers quickly determine product suitability.

📄 Download ES201 Series Datasheet (PDF)

Typical Applications

The ES201 series residual current sensors are widely used in systems where leakage current monitoring is essential for safety and compliance:

• EV charging stations and charging piles
• Residual current devices (RCD / RCBO)
• Industrial power distribution systems
• Inverters and power conversion equipment
• Energy monitoring and protection systems
• Electrical fault detection and safety devices

Why Choose ES201 Series Residual Current Sensors

High Sensitivity Leakage Detection

• Detects small residual currents at mA-level
• Enables early fault detection and fast protective response

Stable and Accurate Measurement

• Optimized magnetic structure ensures stable output
• Maintains accuracy over long-term operation

Wide Current Type Compatibility

• Supports AC, DC, and pulsating DC residual current measurement
• Suitable for modern power electronics and EV applications

Practical and Compact Design

• Space-saving structure for easy installation
• Ideal for both new designs and retrofit systems

Manufacturing & Quality Assurance

As a professional current sensor manufacturer, we ensure consistent product quality through controlled production and testing processes:

• Precision magnetic core selection
• In-house coil winding and assembly
• 100% functional and insulation testing
• Strict quality control throughout production
• Stable supply capability for long-term projects

Each ES201 sensor is tested before shipment to ensure safety, reliability, and performance consistency.

Customization & OEM Support

To meet diverse application requirements, we offer OEM and customization services, including:

• Residual current detection range customization
• Output signal adjustment
• Mechanical structure and mounting options
• Cable length and connector configuration
• Private labeling support

👉 Send us your technical requirements for a customized solution

Application Example

EV Charging Station Leakage Current Protection

In EV charging systems, the ES201 residual current sensor continuously monitors earth leakage currents in real time.
When abnormal leakage occurs, the sensor enables rapid system response, helping prevent electrical hazards and ensuring compliance with safety standards.

This makes the ES201 series a reliable sensing solution for modern EV charging infrastructure.

Your Reliable Residual Current Sensor Supplier

✔ Manufacturer-direct technical support
✔ Stable mass production capability
✔ Experience in global industrial markets

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