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A semiconductor relay is commonly referred to as a SSR (Solid State Relay). An SSR is an electronic switching device that allows a load (AC or DC) to be switched on or off via a control signal, without moving mechanical parts. It relies on semiconductor components (SCR, TRIAC, MOSFET, or transistors) to isolate the input from the output and perform the switching.
Very long service life
Fast and precise switching
Vibration and shock robustness
Quiet operation
Applications
Semiconductor relays are commonly used for:
Schneider Electric's SSL Harmony solid-state relays are the ideal solution for applications requiring reliability, compactness, and fast switching. Their ultra-thin design allows them to fit easily into tight spaces while delivering consistent performance, even in demanding industrial environments.
Ideal applications
Schneider Electric's SSL Harmony solid-state relays are designed to provide reliable, quiet, and durable electrical switching in an ultra-compact format. Their slim interface saves space in electrical cabinets while ensuring consistent performance, even in the most demanding industrial environments.
Thanks to their technology without moving parts, they eliminate mechanical wear and ensure exceptional longevity. Their fast and precise switching makes them ideal for applications requiring frequent switching cycles, while their quiet operation makes them ideal for sensitive environments. Easy to install on DIN rails or panels, SSL Harmony relays are resistant to shock, vibration, and temperature variations, ensuring uncompromising reliability. They are ideal for a wide range of applications, including resistor control, process automation, HVAC systems, packaging machinery, and production equipment.
In short, SSL Harmony solid-state relays combine compactness, reliability, and performance, while reducing maintenance costs and facilitating integration into any type of industrial or commercial installation.
Schneider Electric Harmony SSDs offer quiet, fast, and durable switching in a modular format designed for DIN rail mounting. Ideal for demanding industrial environments, they combine robustness, space savings, and simplified installation.
Ideal applications
Schneider Electric's Harmony SSD solid-state relays are designed to provide a robust, quiet, and durable electronic switching solution, ideally suited to demanding industrial environments. Their modular DIN rail mounting design allows them to be easily integrated into electrical cabinets, optimizing space and simplifying maintenance.
Featuring technology with no moving parts, Harmony SSDs eliminate mechanical wear and ensure exceptional longevity. Their fast and precise switching ensures optimal control of loads, whether resistive (heating, ovens, drying) or inductive (motors, solenoid valves).
Their robust design allows them to withstand shock, vibration, and temperature variations, while incorporating protection against surges and current spikes. This reliability makes them a safe choice for applications requiring frequent cycles and continuous operation.
The Harmony SSP solid-state relays are designed to provide reliable, quiet, and durable electronic switching in the most demanding industrial environments. Specifically designed for panel mounting, they can handle heavy loads while ensuring simple and secure integration into your installations.
Ideal applications
Schneider Electric's Harmony SSPs are high-performance solid-state relays designed to provide reliable, quiet, and durable switching in the most demanding industrial environments. Specifically designed for direct panel mounting, they ensure simple, robust, and secure integration into your installations.
Thanks to their technology without moving parts, Harmony SSPs eliminate mechanical wear and guarantee exceptional longevity. Their Zero Crossing switching mode reduces surges, protects your loads, and extends the life of your equipment.
Available in a wide power range (from 25A to 125A, up to 660V AC), they are suitable for both resistive and inductive loads. Their robust design allows them to withstand shock, vibration, and temperature variations, while also incorporating protection against surges and current spikes. Ideal applications: control of electrical resistances (heating, ovens, drying), automation of industrial processes, HVAC systems, packaging and production machines, as well as any equipment requiring rapid and repeated cycles.
| Type | Technology | Advantages | Disadvantages | Typical Applications |
|---|---|---|---|---|
Type SSL – Slim Interface | Technology Compact solid state relay for DIN rail mounting, electronic (TRIAC/MOSFET) | Advantages Ultra‑slim format, space‑saving, silent, long lifespan, quick installation | Disadvantages Lower power rating compared to larger models, heat dissipation required | Typical Applications Automation, HVAC, resistive load control, compact industrial processes |
Type SSD – Modular DIN Rail | Technology Modular solid state relay for DIN rail, electronic (TRIAC/MOSFET) | Advantages Modular mounting, wide power range, robust, silent, maintenance‑free | Disadvantages Generates heat, higher cost than electromechanical relays | Typical Applications Industrial heating, ventilation, production machinery, frequent‑cycle processes |
Type SSM – Compact Modular | Technology Compact modular solid state relay, electronic (TRIAC/MOSFET) | Advantages Small footprint, easy installation, high reliability, vibration‑resistant | Disadvantages Lower power than SSP, requires thermal management | Typical Applications Medium‑load control, light automation, industrial equipment |
Type SSP – Panel Mount | Technology High‑power panel‑mount solid state relay, electronic (TRIAC/MOSFET) | Advantages High capacity (up to 125A), robust, Zero Crossing, long lifespan | Disadvantages Larger footprint, requires proper cooling | Typical Applications Heavy industrial heating, ovens, drying systems, high‑power machinery |
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