Industrial 603-3 Solid State Relay

The Industrial 603-3 Solid State Relay from Teledyne Relays is a high-speed, transformer-isolated DC switch designed to reliably control DC loads in industrial control, automation, and process control systems without mechanical contacts. As part of the 603 series, it provides a normally open (NO) solid-state output, with a DC control input, and is rated for up to 5 A on the load side and a maximum load voltage of 250 VDC. Its transformer-isolated input-to-output arrangement offers floating output and high dielectric strength, with panel or chassis mounting and screw-terminal connections (configuration dependent) for secure wiring. Common applications include PLC control panels, automated manufacturing equipment, machine tools, process control systems, laboratory instrumentation, power distribution panels, and other industrial automation environments that demand fast, noise-free switching and long service life. The 603-3 is a genuine Teledyne Relays component and is commonly referenced alongside other 603 family devices such as the 603-1, 603-2, and 603-4 for replacements or upgrades.