Siemens Monitoring Relay 1 Phase SPDT DIN Rail 3mA to 500mA 240V AC/DC 3UG4621-1AW30

Siemens 3UG4621-1AW30 monitoring relay is a high-precision single-phase current monitoring device designed to protect electrical systems by detecting both undercurrent and overcurrent conditions with sensitivity ranging from 3mA to 500mA. This relay operates with a supply voltage of 240V AC or DC and is engineered for industrial, manufacturing, electrical, and automation applications where consistent current monitoring is critical for system reliability and safety.

The relay is mounted on a DIN rail, ensuring straightforward installation within control panels. It features a screw terminal connection system and an IP20 protection rating, providing reliable operational security in indoor environments. Time delay parameters for starting bypass and off-delay can be digitally set within 0.1 to 20 seconds, allowing customization for various load characteristics and system responses.

This device also incorporates an LCD display for digital settings and fault memory, enabling easy diagnostics and monitoring. The relay supports simultaneous monitoring of overcurrent and undercurrent across its entire measurement range and is suitable for open circuit detection as well as threshold switching for analog signals between 4 mA and 20 mA.

Constructed with compact dimensions of 22.5mm width, 91mm length, and 92mm height, this Siemens relay provides space-efficient integration into electrical cabinets. It complies with RoHS environmental standards and is manufactured in Germany, ensuring high product quality and compliance with international directives.

Monitors AC and DC currents from 3mA to 500mA with undercurrent and overcurrent detection capability. DIN rail mount for easy installation in electrical enclosures. Supply voltage compatibility: 240V AC/DC. Screw terminal connectors with IP20 protection rating.

Adjustable time delay functions from 0.1 to 20 seconds for operational flexibility. Digital LCD display with fault memory for enhanced diagnostics. Compact size optimized for space-saving panel integration. RoHS compliant and manufactured in Germany for quality assurance.

This monitoring relay is ideal for industrial automation, electrical load monitoring, open circuit detection, and threshold switching applications in manufacturing plants, HVAC systems, water treatment facilities, and other commercial or industrial environments.

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