Solid State Relay Market Size and Share
Market Overview
| Study Period | 2019 - 2030 |
|---|---|
| Market Size (2025) | USD 624.27 Million |
| Market Size (2030) | USD 831.74 Million |
| Growth Rate (2025 - 2030) | 5.91% CAGR |
| Fastest Growing Market | Middle East and Africa |
| Largest Market | Asia Pacific |
| Market Concentration | Medium |
Major Players
*Disclaimer: Major Players sorted in no particular order Image © Mordor Intelligence. Reuse requires attribution under CC BY 4.0. |
|
Solid State Relay Market Analysis by Mordor Intelligence
The solid state relay market stands at USD 624.27 million in 2025 and is forecast to reach USD 831.74 million by 2030, reflecting a 5.91% CAGR. Growth is anchored in the accelerating replacement of electromechanical relays across industrial control, renewable generation, and building systems. Wide-bandgap semiconductors, especially SiC and GaN, are expanding voltage and temperature operating windows, opening high-power opportunities in solar, wind, and grid-edge equipment. Standardized mounting formats and compact footprints are simplifying integration into Industry 4.0 production lines, while strong sustainability mandates in major economies push manufacturers toward mercury-free, energy-efficient switching. Competitive intensity is rising as established electrical majors face focused players building R&D road-maps around higher current ratings, diagnostic functions, and integrated isolation.
Key Report Takeaways
- By mounting type, Panel Mount held 46% of the solid-state relay market share in 2024, while DIN-Rail solutions are set to expand at an 8.6% CAGR through 2030.
- By output type, AC relays led with 52% revenue share in 2024; three-phase devices are projected to advance at a 9.4% CAGR to 2030.
- By load current, the >100 A segment is forecast to grow the fastest at 10.1% between 2025 and 2030, while 0-20 A remained the largest in 2024 at 39%.
- By application, Industrial OEM accounted for 33.5% of the solid-state relay market size in 2024; Renewable Energy & Infrastructure is poised for an 11.3% CAGR to 2030.
- By geography, Asia commanded 41.8% revenue share in 2024; the Middle East & Africa solid-state relay market is projected to accelerate at a 9.8% CAGR.
Global Solid State Relay Market Trends and Insights
Drivers Impact Analysis
| Driver | (~) % Impact on CAGR Forecast | Geographic Relevance | Impact Timeline |
|---|---|---|---|
| Increasing PV and Wind Farm Installations | +1.8% | Europe, North America, Asia Pacific | Long term (≥ 4 years) |
| Retrofit of Electromechanical Relays in Smart Factories | +1.2% | Europe, North America | Medium term (2-4 years) |
| Grid-Edge Deployment of Solid-State Transfer Switches | +0.9% | North America | Medium term (2-4 years) |
| Miniaturisation in Medical Devices | +0.7% | Asia Pacific, North America | Short term (≤ 2 years) |
| HVAC OEM Shift to Mercury-Free Components in Nordics & DACH Region | +0.5% | Europe | Short term (≤ 2 years) |
| Source: Mordor Intelligence | |||
Increasing PV and Wind Farm Installations Demanding Arc-Free Switching
Strong renewable build-outs demand switching solutions that eliminate arcing and withstand frequent cycling. Solid-state relays meet these needs by providing rapid, contact-free operation that protects PV inverters and wind turbine controllers from fire risk.[1]WilderHill Clean Energy Index, “2025 Q1 ECO Quarterly Report,” wildershares.com SiC-based devices handle temperatures beyond 200 °C, ensuring dependable service in desert or offshore sites.[2]Jonathan Dodge, “Revolutionizing Circuit Protection with SiC JFETs,” Bodo’s Power Systems, bodospower.com Alfred Vollmer, “SiC and GaN in Huge Quantities,” Bodo’s Power Systems, bodospower.com Coupled with advanced grid management software, they enable fast curtailment and smoothing of intermittent generation. National support programs in Europe and the United States further accelerate adoption as utilities tie renewables deeper into distribution networks.
Rising Retrofit of Electromechanical Relays in Smart Factories
Factories modernising under Industry 4.0 targets are replacing mechanical relays to cut downtime and energy loss. Solid-state solutions deliver up to 100% higher energy efficiency and remove contact wear, boosting line availability in precision machining and packaging lines.[3]Sensata Technologies, “Guide to Solid-State Relays for Motor Control,” azosensors.com European policy that links equipment longevity to tax incentives is reinforcing retrofit momentum. Vendors bundle diagnostic firmware that flags over-temperature events, giving plant engineers predictive maintenance insights and further justifying the switch despite higher purchase prices.
Grid-Edge Deployment of Solid-State Transfer Switches in North America
Utilities in storm-prone regions are placing solid-state transfer switches at feeders and microgrid tie-ins to improve resilience. Sub-cycle transfer times minimise outages during phase loss or voltage sag, capabilities electromechanical devices cannot match. The U.S. Department of Energy budgeted USD 59.066 million for renewable grid integration in FY 2025, channeling funds to demonstration programs that specify solid-state hardware.[4]U.S. Department of Energy, “DOE FY 2025 Budget Justification Vol 4,” energy.gov Field data show improved voltage regulation and faster service restoration after faults, supporting wider rollout.
Miniaturisation Push in Medical Devices Elevating SSR Adoption
Portable monitors and implantable pumps require smaller, cooler components. Solid-state relays meet these constraints with chip-on-board footprints and low heat dissipation. Asian device makers integrate SiC and GaN switches to shrink enclosures while maintaining safe isolation. Reliability gains reduce recalibration cycles, a critical factor in home-care and outpatient settings where service visits are costly.
Restraints Impact Analysis
| Restraint | (~) % Impact on CAGR Forecast | Geographic Relevance | Impact Timeline |
|---|---|---|---|
| Higher Up-Front Cost Versus Electromechanical Relays | -1.1% | Global, most pronounced in price-sensitive markets | Medium term (2-4 years) |
| Thermal Management Challenges Beyond 40 A Load Current | -0.7% | Global | Medium term (2-4 years) |
| Electromagnetic Interference Susceptibility in High-Frequency Rail Traction | -0.4% | Europe, Asia Pacific | Short term (≤ 2 years) |
| Limited Field-Replaceability in Mission-Critical Utilities | -0.3% | North America, Europe | Long term (≥ 4 years) |
| Source: Mordor Intelligence | |||
Higher Up-Front Cost Versus Electromechanical Relays
Solid-state devices remain 30-50% more expensive than mechanical units, deterring uptake in budget-sensitive installations. The gap is widest below 20 A, where performance advantages are less visible to buyers focusing on short-term capex. While volume production and improved wafer yields are narrowing costs, price parity is not expected before 2029 in many emerging markets.
Thermal Management Challenges Beyond 40 A Load Current
At higher currents, semiconductor junctions generate heat that requires bulky heat sinks or active cooling. Added material and installation space offset other solid-state benefits, steering some designers back to heavy-duty electromechanical contactors. SiC technology promises lower on-state resistance, yet design limits persist in tight enclosures like elevator drives or shipboard panels. Continuous R&D into advanced substrates and phase-change materials seeks to relieve this bottleneck over the medium term.
Segment Analysis
By Mounting: DIN-Rail Gains Momentum in Modular Control
Panel Mount devices held the largest 2024 share at 46%, anchoring the solid-state relay market in traditional control cabinets where direct plate fastening dominates. Their prevalence in retrofit projects sustains volume as factories upgrade without redesigning panels. DIN-Rail solutions, however, are scaling fastest at an 8.6% CAGR through 2030 as OEMs standardise modular racks that enable tool-less replacement and higher wiring density across European production lines.
Demand for DIN-Rail also benefits from improved heat-spreading baseplates and clip-on sinks that keep junction temperatures stable under continuous 30 A loads. PCB and chip-on-board formats cater to handheld medical and test gear where board real-estate is at a premium. Plug-in sockets retain a niche in laboratories requiring frequent functional swaps, but their share continues to decline as maintenance teams prioritise closed-door safety.
Note: Segment shares of all individual segments available upon report purchase
By Output Type: Three-Phase Relays Support Power Quality
AC relays led with 52% revenue in 2024, mirroring everyday heating and lighting control needs in factories and buildings. Three-phase models, though smaller in number, are forecast for a 9.4% CAGR as grid modernisation and high-efficiency motor drives spread. Advanced zero-crossing and phase-loss detection features minimise harmonics, improving plant power factor.
Higher switching endurance without arc-wear makes three-phase solid-state devices attractive for wind turbine yaw motors and battery energy storage inverters. DC relays, essential to battery management and electric vehicle chargers, secure stable demand. Hybrid AC/DC variants cater to mixed-input microgrids where architecture can evolve during project life.
By Load Current Rating: Above 100 A Segment Surges
The solid-state relay market size for 0-20 A applications remained dominant at 39% in 2024, serving modest-power automation, white goods, and building systems. The 21-40 A band supports industrial heaters and midsize conveyors, balancing cost and performance. High-current devices above 100 A show the fastest 10.1% CAGR amid renewable infrastructure and heavy-industry electrification.
SiC JFET and MOSFET topologies reduce conduction losses, allowing >100 A SSRs to compete with vacuum contactors in solar central inverters and mining pumps. Vendors pair integrated temperature sensors with cloud dashboards to warn against thermal runaway, offsetting reliability concerns. Novel heat-pipe chassis and castellated fins address installation within confined enclosures.
Note: Segment shares of all individual segments available upon report purchase
By Application: Renewable Infrastructure Accelerates
Industrial OEMs accounted for 33.5% of the solid-state relay market in 2024, anchored in robotics, CNC, and packaging lines where mechanical wear translates into costly downtime. Building equipment follows, leveraging silent operation in HVAC and elevator controls. The solid-state relay market size for Renewable Energy & Infrastructure is projected to expand 11.3% annually through 2030, powered by inverter growth and grid-tie upgrades.
Utility-scale solar farms deploy hundreds of SSRs for fast DC disconnect and monitoring, while wind turbines rely on contact-free switching to survive vast cycling counts. Rolling stock auxiliary converters, medical imaging, automotive battery packs, and consumer appliances each contribute incremental demand, reflecting technology’s broad usefulness.
Geography Analysis
Asia led with a 41.8% solid-state relay market share in 2024. China’s push for domestic semiconductor capacity-from firms such as Will Semiconductor-shortens supply chains and stabilises pricing. Japan and South Korea focus on micro-miniature relays for automotive ADAS and implantable medical devices, leveraging national strengths in precision fabrication. Regional policies favouring smart factories and distributed solar ensure steady demand growth.
Europe remains the second-largest market, driven by energy-efficiency rules and mercury-free mandates that align with solid-state technology. DIN-Rail architecture is ubiquitous, easing adoption in brownfield sites. Specialized vendors supply relays with integrated diagnostics for offshore wind substations, addressing harsh North Sea conditions. Public funding for hydrogen and rail modernisation supports new application clusters.
The Middle East & Africa region is the fastest-growing, with a 9.8% CAGR projected to 2030. Mega-scale solar parks in the Gulf adopt solid-state switching in string inverters to cope with sand, heat, and 24/7 load cycles. Smart-city plans in UAE and Saudi Arabia include building automation and street-lighting projects that favour arc-free relays. Starting from a smaller base, the region presents attractive margins for suppliers willing to customise for extreme ambient temperatures.
Competitive Landscape
Global supply is moderately concentrated; the top five companies—ABB, Omron, Panasonic, Carlo Gavazzi, and Sensata Technologies—hold about 45% combined revenue share. Larger electrical conglomerates bundle solid-state relays within broader automation portfolios, leveraging distribution networks to defend share. Specialist makers focus on niche performance, such as cryogenic operation or integrated sensing, to win design-ins at newer OEMs.
Investment is tilting toward semiconductor capability. Nexperia’s USD 200 million Hamburg expansion aims to scale SiC and GaN wafer output, enabling tighter integration between die design and final relay form factors. Infineon and Broadcom channel coreless-transformer isolation IP into solid-state relay reference designs, shrinking module footprint while raising surge immunity.
Strategic partnerships are multiplying. Semiconductor houses team with relay assemblers to co-develop thermal substrates and digital diagnostics that align with wider power-electronics road-maps. White-space opportunities exist in >150 A switching and medical-grade isolation, segments where no single player yet dominates.
Solid State Relay Industry Leaders
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Rockwell Automation Inc
-
ABB Ltd.
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Infineon Technologies AG
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Sensata Technologies Inc.
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Vishay Intertechnology Inc.
- *Disclaimer: Major Players sorted in no particular order
Recent Industry Developments
- April 2025: Celduc released its 2025 guide featuring three-phase relays with enhanced thermal management for renewable inverters.
- March 2025: ASM International reported SiC epi sales growth despite wider market softness, supporting high-temperature relay demand.
- February 2025: The 10th New Energy Industry Expo forecast a 9.5% CAGR for China’s energy-storage market, signalling rising relay opportunities in grid integration.
- November 2024: Research in the International Journal of Hydrogen Energy outlined an optical isolation relay achieving 98.23% transmission accuracy for green-hydrogen microgrids
Research Methodology Framework and Report Scope
Market Definitions and Key Coverage
Our study defines the solid-state relay (SSR) market as all factory-built switching devices that use power semiconductors instead of mechanical contacts to control AC, DC, or AC/DC loads across industrial, building, mobility, and infrastructure applications. According to Mordor Intelligence, the scope tracks only complete packaged SSR units sold through direct and indirect channels in original-equipment and retrofit projects.
Scope exclusion: Modules integrated inside power converters, solid-state circuit breakers, and electromechanical or reed relays are outside this assessment.
Segmentation Overview
- By Mounting
- Panel Mount
- PCB/Chip-On-Board Mount
- DIN-Rail Mount
- Plug-in/Socket Mount
- By Output Type
- AC Solid-State Relay
- DC Solid-State Relay
- AC/DC Hybrid Relay
- Three-Phase Solid-State Relay
- By Load Current Rating
- 0 - 20 A
- 21 - 40 A
- 41 - 100 A
- > 100 A
- By Application
- Energy and Infrastructure (Renewables, Grid-Edge, UPS)
- Industrial OEM (Robotics, CNC, Packaging)
- Building Equipment (HVAC, Elevators, Fire Safety)
- Food and Beverage Processing
- Automotive and Transportation (EV Chargers, Railway Signalling)
- Industrial Automation (PLCs, Motion Control)
- Healthcare and Medical Devices
- Consumer Electronics and White Goods
- By Geography
- North America
- United States
- Canada
- Mexico
- Europe
- Germany
- United Kingdom
- France
- Italy
- Spain
- Rest of Europe
- Asia-Pacific
- China
- Japan
- South Korea
- India
- South East Asia
- Rest of Asia-Pacific
- South America
- Brazil
- Rest of South America
- Middle East and Africa
- Middle East
- United Arab Emirates
- Saudi Arabia
- Rest of Middle East
- Africa
- South Africa
- Rest of Africa
- Middle East
- North America
Detailed Research Methodology and Data Validation
Primary Research
Interviews with component makers, contract manufacturers, automation OEM engineers, and regional distributors across Asia-Pacific, North America, and Europe clarified average selling prices, heat-dissipation limits, and channel mix trends. These conversations let us stress-test secondary findings, plug data gaps, and fine-tune growth assumptions.
Desk Research
Our analysts first mined open data sets such as UN Comtrade trade codes for 853649, International Energy Agency solar and wind capacity additions, and IEC 61810 standards updates that trigger design refresh cycles. Industry association briefs from SEMI, IEEE Power Electronics Society, Japan Electronics and Information Technology Industries Association, plus company 10-K filings and investor decks supplied baseline shipment, pricing, and design-win clues. Subscription sources like D&B Hoovers for vendor financials and Dow Jones Factiva for shipment-level news helped refine regional splits. The sources listed here illustrate the wider pool consulted; many additional public records and academic papers were also reviewed to validate data points.
Market-Sizing & Forecasting
A top-down pool was built by reconstructing global SSR demand from production and trade statistics, which are then sliced by mounting type and load current using installation ratios shared by interviewees. Select bottom-up checks, panel-mount supplier roll-ups, and sampled ASP × volume for PCB relays anchor the totals. Key model drivers include new PV inverter shipments, EV battery-management unit counts, industrial robot installations, and average panel-mount ASP progression. A multivariate regression links these indicators to historical SSR revenues before an ARIMA overlay projects five-year trajectories. Where bottom-up totals diverged beyond five percent, inputs were revisited or weighted averages applied.
Data Validation & Update Cycle
Outputs pass a three-layer review that screens out unit-price anomalies, region-share outliers, and year-on-year jumps. Senior analysts sign off only after reconciling variances with independent import data. Models refresh annually, with interim updates if tariff shifts, major plant expansions, or mergers materially alter the baseline.
Why Our Solid-state Relay Baseline Commands Reliability
Published numbers often vary because firms apply different device definitions, bundle allied components, or freeze exchange rates at divergent points.
Key gap drivers include (a) others merging SSRs with solid-state breakers and opto-isolated switches, inflating totals; (b) aggressive EV adoption assumptions without cross-checking charger rollout pacing; and (c) longer refresh cycles that miss recent ASP easing in Asia.
Benchmark comparison
| Market Size | Anonymized source | Primary gap driver |
|---|---|---|
| USD 624 million | Mordor Intelligence | - |
| USD 1.65 billion (2024) | Global Consultancy A | Bundles SSRs with hybrid relays and uses list prices without regional discounts |
| USD 1.54 billion (2024) | Industry Association B | Counts integrated SSR chips inside inverters and extrapolates EV sales using a single high-growth scenario |
Our comparison shows that Mordor's disciplined scope selection, dual-path modeling, and annual refresh cycle yield a balanced, transparent baseline that decision-makers can trace back to explicit variables and repeatable steps.
Key Questions Answered in the Report
What is the current value of the solid-state relay market?
The market is valued at USD 624.27 million in 2025 and is projected to reach USD 831.74 million by 2030.
Which segment leads by mounting type?
Panel Mount relays lead with 46% revenue share, though DIN-Rail devices are the fastest growing at an 8.6% CAGR.
Why are solid-state relays preferred in renewable energy systems?
They eliminate arcing, handle high switching frequencies, and withstand elevated temperatures, improving safety and uptime in solar and wind installations.
What restrains wider adoption of solid-state relays?
Higher up-front cost versus electromechanical relays and thermal management challenges above 40 A limit penetration in price-sensitive and high-current applications.
Which region is expected to grow the fastest?
The Middle East & Africa market is forecast to expand at a 9.8% CAGR between 2025 and 2030 due to large-scale infrastructure and renewable projects.
How concentrated is the competitive landscape?
Moderately concentrated, with the top five players controlling around 45% of revenue.
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