Definition: Electromechanical or solid-state switches that control high-power circuits using a low-power signal.

Types:

• Electromechanical Relays (EMR): Use coil and contacts; suitable for high voltage/current switching.
• Solid-State Relays (SSR): No moving parts; faster, silent, long life; ideal for frequent switching.
• Hybrid Relays: Combine EMR and SSR advantages.

Key Parameters:

• Contact Rating (AC/DC Voltage & Current)
• Coil Voltage (e.g., 5V, 12V, 24V)
• Switching Speed
• Isolation Voltage
• Mounting: PCB, Socket, Panel

Applications:

Motor control, HVAC systems, industrial automation, power supplies, lighting control.

Select Tips:

Ensure contact rating exceeds load requirements. Consider inrush current, environment (dust, humidity), and lifetime expectations.