Steady State Relay 15-32V SSR10a DC SSR Relay

DC SSR of Single In-line

Dimensions  Of DC SSR Relay

DC SSR of Horizontal,DC SSR of Module

Dimensions Of DC SSR Relay

Solid state relay comparisons

The most common comparisons made between solid state relays vs mechanical ones are broadly based on two key factors: speed of operation, and overall longevity. As we’ll see, solid state versions tend to outperform mechanical relays on both counts, because the lack of moving parts in a SSR means it can work faster and for longer without needing replacement than an equivalent mechanical version.

Despite this general rule of thumb, though, there may still be specific applications and environments in which mechanical relay switches remain a more suitable option, and are actually preferable to solid state switches in day-to-day use.

Solid state relays vs mechanical relays
Because the SSR is basically using light and/or sensors to transfer the signal, rather than physical movement, switching between on/off states can be performed orders of magnitude faster than in EMR equivalents.

This means that SSRs boast a range of abilities and characteristics that may be of potential value in many specific usage applications and industries. Application-specific advantages of solid state relay switches might include:

Very little wear over time thus increased longevity on paper

Electromechanical relays with moving parts will eventually need replacing

Near-silent operation

Ability to perform extremely fast/high-frequency switching

Typically far lower power consumption than EMRs

No potential for sparking caused by rapid movement of components

This is important in some chemically volatile or potentially explosive environments

Reduced risk of contact failure due to physical defects or inconsistencies

No risk of ‘bouncing’ contacts (accidental multiple contacts made, to due inaccuracy or inadequate cushioning of movement)

Solid state relays themselves can be manufactured in far smaller and more compact form factors than mechanical versions

To complete the above actions reliably, smoothly and quickly without performing any actual mechanical action, SSRs instead rely on a number of other crucial components in order to function properly. These may include a variety of different semiconductor switching elements, such as photocouplers, diodes, transistors, thyristors and more.

Omron-SPDT-Solid-State-Relay-AC-DC-600x600-0.jpgHowever, while technically impressive and extremely useful in a range of different scenarios, the added complexity of SSRs means that they do also have their perceived drawbacks when compared to EMRs in certain uses or environments. These might include:
Reduced overall efficiency in terms of effective voltage transfer compared to EMRs (there will always be a fixed drop-off on the output side)
This might make very little difference at higher voltages, as it’s fixed rather than proportional - but at lower voltages, it will be comparatively much more significant
This can make a noticeable difference to equipment on the output side, impacting its ability to run at full power
There is almost always some form of ‘leakage’ current when an SSR is supposedly in an open position
This makes them unsuitable for use in many types of safety disconnect, as they can still transfer current (and deliver a shock) at high voltages even when ‘off’
Kudom-Solid-State-Relay-3-Phase-Panel-Mount-600x600-0.jpg

Vulnerability to being triggered by very brief voltage spikes and surges, which a less responsive EMR would typically ‘ignore’
Greater potential for SSRs to overheat when components are crowded, or when switching large loads
Some configurations of solid state relays may require external cooling
Although longevity is commonly cited as a major reason to opt for SSRs over mechanical relays, many of the potential failure points in either type of relay don’t involve the moving parts themselves
Some argue this makes the difference in perceived durability something of a ‘theoretical’ advantage, rather than a very practical one
Solid state relays tend to considerably more expensive than mechanical ones

Our Company

Founded in 1992, Wuxi Gold Control Technology Co., Ltd., a private high tech company, is specialized in the research and production of Solid State Relays, Electronic Semiconductors, DC Motor Drivers and AC Voltage Regulation Devices.

For the past 10 consecutive years, our company has been qualified as "Jiangsu's private high tech business". We have also been given the honor as "Wuxi's 10 Best Private Science & Technology Enterprises" for years.

Our products, the electronic modules with the brand of Gold, have been listed among "Wuxi's Renowned Products".Our company has 5 patents on Solid State Relays. Our products are widely used in various industrial automation control areas like chemical fiber machinery, temperature control of electric furnace, rubber & plastic machinery, fountain control and digital-controlled machinery, and are sold to Europe, America, Korea and Turkey.

Our Factory

Our factory can produce about 50,000 pieces each month. We can give you good quality and reasonable prices. We have 20 professional research people who have all been graduated from famous universities and colleges. When producing, we have strict tests: self-test, inter-test and special-test.

Our Certificate

Our products, the electronic modules with the brand of Gold, have been listed among "Wuxi's Renowned Products".Our company has 5 patents on Solid State Relays. Our products are widely used in various industrial automation control areas like chemical fiber machinery, temperature control of electric furnace, rubber & plastic machinery, fountain control and digital-controlled machinery, and are sold to Europe, America, Korea and Turkey.

Our company passed the Certification of ISO9001:2000 in 2000. Our main products have been given CE Certificate of European Union, UL,CUL and RoHS Certificates.