Relays, Sensors & Connectors: Which Components Are Growing Fastest?
Small components often have a big impact. Relays, sensors, and connectors may go unnoticed, but they are the backbone of modern electronics, keeping machines functional, devices responsive, and systems safe and secure.
As industries like automotive, industrial automation, consumer electronics, and smart devices expand, demand for these components is changing rapidly. Some are seeing faster growth than others, driven by innovations, evolving applications, and new product designs.
Understanding which components are leading the charge helps engineers, manufacturers, and businesses make better decisions when sourcing parts or planning new projects.
In this blog, we explore the growth trends of relays, sensors, and connectors and what’s shaping their future.
What are relays, sensors, and connectors?
Relays switch electrical circuits on and off. They act like automated gatekeepers for current, letting a low-voltage signal control a high-power load.
Sensors detect physical conditions, like temperature, motion, pressure, or light, and convert them to electrical signals that machines can use.
Connectors link different parts of a circuit so electricity and data can travel between chips, boards, and systems.
Each serves a unique purpose, and all are important across industries such as automotive manufacturing, industrial automation, healthcare devices, and consumer electronics.
How fast are they growing?
Let’s look at what recent industry data shows about market growth for relays, sensors, and connectors:
1. Sensors: Leading Growth
Among the three, sensors are growing the fastest.
Reports on connected sensors forecast a double-digit growth rate (around 12% CAGR) over the next decade, making them one of the most dynamic sub-segments in the component market.
This rapid rise is linked to several factors:
- Connected Devices: The boom in smart devices and connected systems keeps adding more sensors per product. Modern smartphones, wearables, and industrial systems use multiple sensors to monitor everything from motion to environmental conditions.
- Automotive Trends: Cars today use sensors for safety systems, driver assistance, and energy management. As electric vehicles and intelligent safety systems become more common, sensor variety and volume expand.
- Industrial Needs: Manufacturing floors are adding sensors to track performance, improve safety, and prevent downtime.
In simple terms, sensors are everywhere, and their growth reflects how electronics are moving from simple machines to data-aware systems.
2. Connectors: Steady, Strong Demand
Next up are connectors.
Connectors are seeing steady growth of around 5–6% annually, supported by their wide use in automotive, telecom, and industrial automation applications.
Why this matters:
- Increasing Connectivity: Devices now demand more points of connection for power and data. Whether wiring a machine control panel or linking modules inside a robot, connectors act as those critical links.
- Miniaturization Trends: New gadgets and small form-factor electronics need compact, high-performance connectors, pushing innovation and market expansion.
- 5G and Telecom: Growth in high-speed network infrastructure is another boost for connectors, especially specialized types like RF connectors.
So connectors may not be exploding as fast as sensors, but they are reliable growth engines that support nearly every electronic system.
3. Relays: Slow but Steady Expansion
Relays show moderate growth, slower than sensors and connectors.
Market reports suggest that the relay segment might grow at about 4–7% over the next decade, depending on the type (for example, solid-state relays often grow faster than mechanical ones).
What keeps relays relevant?
- Industrial Automation: Factories depend on relays for protection and control systems.
- Automotive Electrification: Electric vehicles need relays to manage power distribution and safety circuits.
- Innovations: New relay designs, like solid-state relays, offer better performance, allowing relays to adapt to modern electronic requirements.
Even though their growth pace is milder, relays remain indispensable, especially where electrical switching and safety are involved.
Why sensors are pulling ahead
Sensors are growing faster than relays and connectors because they help machines understand what is happening around them. They detect things like temperature, movement, pressure, or light and turn that information into signals a system can use.
As a result, devices now include more sensors and often use several different types at once. This growing use is seen in both consumer products and industrial equipment.
Relays and connectors mainly handle switching and connections, but sensors allow machines to respond and adjust, which is why their demand continues to rise across many industries.
How Competitors View These Trends
Across the electronics industry, major players like Honeywell, Bosch, TE Connectivity, and Omron are expanding their sensor lines, especially for automotive and industrial use cases. This reflects the priority given to sensing technologies in new product designs.
Meanwhile, established connector manufacturers such as Molex, Hirose, and Amphenol focus on meeting demands for higher speeds and smaller sizes. Relays from companies like Schneider Electric and Finder continue to address power control needs in factories and infrastructure projects.
In other words, while all three categories are important, sensors are currently capturing the most attention, followed by connectors and then relays.
Conclusion
Relays, sensors, and connectors each have solid places in the electronics ecosystem. Sensors are leading growth, driven by demand for data and awareness in devices. Connectors follow with steady expansion as systems become more complex and require versatile connections.
Relays grow at a stable pace with new designs matching industrial and automotive needs. For suppliers and engineers alike, understanding these trends helps with smarter purchasing and product planning.
Whether you’re designing smart machines or sourcing parts for volume production, keeping an eye on how each component segment is moving gives you an edge in choosing the right parts for the right projects.