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Solid State Relays
Solid State Relays (SSRs) are semiconductor-based switching devices that perform the same function as electromechanical relays but without moving parts. They use optocouplers or transformers for input-to-output isolation and thyristors, triacs, or MOSFETs for output switching. Key technical parameters include load voltage (from 24 VAC/DC up to 6...
Solid State Relays (SSRs) are semiconductor-based switching devices that perform the same function as electromechanical relays but without moving parts. They use optocouplers or transformers for input-to-output isolation and thyristors, triacs, or MOSFETs for output switching. Key technical parameters include load voltage (from 24 VAC/DC up to 600 VAC), load current (from 2 A to 150 A), control voltage (typically 3-32 VDC or 90-280 VAC), and zero-crossing or random-fire switching modes. SSRs are available in panel mount, DIN rail mount, and PCB mount form factors, with IP20 or higher protection ratings. They are known for high switching speed, silent operation, and long electrical life, making them ideal for resistive and inductive loads.
Applications span industrial automation, HVAC systems, plastic injection molding machines, packaging equipment, and temperature control systems. They are commonly installed in control panels, motor control centers, and distributed I/O systems. SSRs excel in environments requiring frequent switching, such as oven heating elements, lamp dimming, and motor soft-start circuits. Their solid-state construction makes them suitable for harsh environments with vibration, dust, or corrosive atmospheres.
Subcategories include single-phase SSRs (e.g., model series SSR-1P-25A, SSR-1P-40A, SSR-1P-60A), three-phase SSRs (e.g., SSR-3P-25A, SSR-3P-40A, SSR-3P-60A), and DC output SSRs (e.g., SSR-DC-10A, SSR-DC-20A). Codes typically follow the pattern: SSR-[Phase][Current Rating][Voltage], where Phase is 1P or 3P, Current Rating is in amperes (e.g., 25A, 40A), and Voltage is optional (e.g., 480V). Accessories include heat sinks (e.g., HS-100, HS-200), snubber modules, and DIN rail adapters.
Electric Automation Network offers express worldwide shipping and specialized engineering support for SSR selection, thermal management, and integration. Our engineers provide personalized assistance for load calculations, heat sink sizing, and compatibility with PLC or temperature controllers. We ensure real-time pricing and technical documentation for every SSR model, including datasheets and wiring diagrams.
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