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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 with no moving parts. They use optocouplers or transformers for input-to-output isolation and thyristors, triacs, or MOSFETs for the output switching stage. Key technical parameters include load voltage (from 24 VAC/...
Solid state relays (SSRs) are semiconductor-based switching devices that perform the same function as electromechanical relays but with no moving parts. They use optocouplers or transformers for input-to-output isolation and thyristors, triacs, or MOSFETs for the output switching stage. Key technical parameters include load voltage (from 24 VAC/DC up to 600 VAC), load current ratings (from 2 A to 150 A), zero-crossing or random-fire switching modes, and dielectric strength typically exceeding 2500 VAC. SSRs are available in panel-mount, DIN-rail, and PCB-mount form factors, with IP20 protection for most industrial enclosures. They offer fast switching speeds (microseconds), high reliability, and silent operation, making them ideal for resistive and inductive loads.
SSRs are widely deployed in industrial automation, process control, HVAC systems, plastic injection molding machines, packaging equipment, and food processing lines. They are also used in medical devices, semiconductor manufacturing, and lighting control systems where precise temperature regulation or rapid cycling is required. Their solid-state design eliminates contact wear and arcing, making them suitable for hazardous environments with flammable gases or dust.
Our category includes a comprehensive range of SSRs such as single-phase and three-phase models, DC-controlled and AC-controlled variants, and high-current versions for heavy loads. Key article codes follow a structured pattern: for example, SSR-1P-25A-240V indicates a single-phase, 25 A, 240 V model; SSR-3P-50A-480V denotes a three-phase, 50 A, 480 V unit. Subcategories include zero-crossing SSRs, random-fire SSRs, and integrated heat sink assemblies. We also stock accessories like DIN-rail mounting brackets, thermal pads, and snubber circuits.
Partnering with Electric Automation Network ensures access to genuine, factory-tested SSRs from leading manufacturers. Our engineers provide personalized technical support for load calculations, heat sink sizing, and snubber selection. We offer real-time pricing, detailed datasheets, and express worldwide shipping. Benefit from up to 65% discount compared to list prices, with stock availability for urgent projects.
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