The 4SH5321 is an AC-operated industrial relay from Fuji Electric's "Orange Line" SH Series, featuring a 5-pole configuration with 3 normally open (NO) and 2 normally closed (NC) auxiliary contacts. This relay is designed for high contact reliability with bifurcated contacts that accommodate direct input to electronic control circuits, with minimum operational voltage and current of 5V and 3mA DC. The relay operates at AC voltages up to 600V with rated operational currents ranging from 12A at 600V to 60A at 120V, and features a continuous current rating of 10A. It conforms to international standards including IEC, NEMA, BS, and VDE, with UL, CSA, BV, and Lloyd approvals, and can be mounted on standard 35mm IEC or DIN rails. The relay offers mechanical life expectancy of 10 million operations and electrical life of 500,000 operations at 220V AC11, making it suitable for industrial automation, control systems, and electronic device switching applications requiring high reliability and field flexibility.