I-AUTOC 3 Phase AC Solid State Zero Crossing Panel Mount Relay - 40A

The I-AUTOC 3 Phase AC Solid State Zero Crossing Panel Mount Relay is a high-performance, optically isolated switching component engineered for demanding industrial control and automation applications. It utilises Silicon Controlled Rectifier (SCR) outputs, offering robust and reliable switching for three-phase AC loads up to 480V AC. The zero-crossing switching mode is a critical feature, ensuring the relay activates only when the AC voltage waveform is at zero volts. This significantly reduces inrush current and electrical noise, minimising stress on connected equipment and extending component lifespan.

Optical isolation provides a crucial barrier of safety and integrity, separating the low-voltage control circuit (4-32V DC) from the high-voltage load side. This design protects sensitive control electronics from voltage spikes and transients present on the power lines. An internal Metal Oxide Varistor (MOV) and RC snubber protection circuit is integrated to suppress voltage surges and noise, enhancing the relay's durability and operational reliability in electrically noisy environments.

Constructed for panel mounting, this relay is housed in a compact and durable casing suitable for integration into control cabinets, machinery, and automated systems. Its high dielectric strength of 4000Vrms offers superior insulation, making it a safe choice for industrial settings. The device is capable of handling load currents up to its specified rating, with a maximum operating voltage of 530V, providing a safety margin for standard 480V AC systems.

This solid-state relay is an ideal solution for applications requiring silent, spark-free, and long-life switching, such as controlling industrial heaters, motors, transformers, and lighting systems. Its solid-state construction means no moving parts to wear out, resulting in maintenance-free operation and exceptional longevity compared to traditional electromechanical relays.

Variant Details

• Size: 40A