ABB 2CSJ203001R0002 RD3P 500mA 230-400V AC DIN-Rail Residual Current Monitoring Relay

The ABB RD3P (SKU: 2CSJ203001R0002) is a Type A residual current monitoring relay designed to continuously supervise insulation integrity and detect earth fault currents in AC electrical installations. Part of the ABB RD3 series, the RD3P monitors leakage currents up to 500 mA across a rated voltage range of 230–400 V AC and mounts directly on standard DIN rail, making it an ideal solution for industrial control panels, distribution boards, and automation systems where earth fault detection is critical for personnel safety and equipment protection.

Technical Specifications

Certifications & Standards

• RoHS: Compliant with the Restriction of Hazardous Substances Directive
• REACH: Compliant with EU REACH regulation on chemical substances
• EU Directive 2011/65/EU: Compliance with the European Union RoHS Directive
• Amendment 2015/863: Compliant with the RoHS amendment expanding restricted substances list
• IEC EN 60947-2 Ann M: Meets Annex M requirements for residual current protection devices under IEC EN 60947-2
• IEC EN 60947-2: Certified to the international standard for low-voltage switchgear and controlgear — circuit breakers
• EN 60947-2: Compliant with the European harmonised standard for low-voltage circuit breakers
• WEEE: Registered under the Waste Electrical and Electronic Equipment Directive for responsible end-of-life disposal

Applications & Use Cases

• Earth fault and leakage current monitoring in industrial control panels
• Insulation supervision in distribution boards and motor control centres
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• Personnel protection in automation and process control systems
• Continuous residual current monitoring in commercial and industrial buildings
• Integration with PLCs and SCADA systems via relay output signalling