Phoenix REL-MR-230AC/21-21 Single Relay

The Phoenix Contact REL-MR-230AC/21-21 (Part No: 2961451) is engineered for industrial-grade performance with a nominal input voltage of 230 V AC and a wide input voltage range from 179.4 V AC to 356.5 V AC. It maintains efficient operation with a typical input current of 3 mA and low power dissipation of 0.4 W, supporting energy-conscious automation environments.

This Single Relay features 2 changeover contacts using AgNi contact material for high conductivity and durability. It supports a maximum switching voltage of 250 V AC/DC and allows for a limiting continuous current of 8 A. Its ability to handle a maximum inrush current of 12 A (20 ms) ensures it can manage inductive loads and contactors without degradation. The minimum switching voltage of 5 V at 10 mA offers stable low-signal operation, while the interrupting rating of 190 W at 24 V DC makes it suitable for moderate power loads.

Designed with a mechanical service life of 10 million cycles and tested to 5 kV dielectric strength, the relay ensures operational reliability in harsh industrial environments. It comes with a plug/solder connection, RT III protection, and is compliant with IEC 60664 for electrical insulation. With an operating temperature range of -40 °C to +85 °C and a compact 12.7 mm width, this relay is trusted by engineers for applications where space, durability, and precision switching are critical. For related relays, see the Phoenix Relay category or visit the Phoenix Contact brand page.

For maintenance engineers and automation technicians, the REL-MR-230AC/21-21 offers dependable operation under both resistive and inductive loads. Its ability to switch up to 250 V AC/DC with high surge tolerance makes it a go-to choice for industrial switching applications. Students and trainees benefit from understanding how such dual-contact relays operate across real-world systems, bridging theory with application in sensor interfaces, signal routing, and output control.