Ssrs are not very different in general operation from mechanical relays that have movable contacts. Panasonic provides a wide selection of products according to the application and capacity requirements. The inputs on most ssrs are isolated from the load. Switching types include dc switching for lowvoltage dc loads and zero cross for resistive ac loads where the output energizes deenergizes when control voltage is near zero.
Wide lineup of generalpurpose solid state relays with applicable loads of 5 to 90 a. Baomain bridge rectifier mdq200a 200a 1600v full wave diode module single phase. Overview of solidstate relays omron industrial automation. G3b g3bd plugin type ssr, shape and size compatible with the mk power relay. In this project we will have a look at solid state relays, find out how they work and when to use them and in the end create our own diy solid state relay. They are therefore ideal for applications that require longterm reliability for highly frequent switching. Pmp9522 isolated 26vacdc solidstate relay reference design.
Lowcost ac solidstate relay with mosfets 1 system overview 1. Rated for 24vac, it can switch loads up to approximately 17a. Ambient temperature and the on state resistance distribution of a normallyoff type ocmos fet. Solid state relais sharp s202s02 can i connect it like above. A solid state relay ssr is a re lay that does not have a moving contact. These devices are ideally suited for controlling high voltage ac loads with solid state reliability while providing 4kv isolation from input to output. A solid state relay switch is a control relay with isolated input and output, whose functions are achieved by means of electronic components without the use of moving parts such as those found in electromechanical relays.
G3pa solid state relays with exchangeable power cartridge. A solidstate relay ssr is an electronic switching device that switches on or off when a small. Static relay solid state relays in this type of relay, the comparison or measurement of electrical quantities is performed by a static circuit which gives an output signal for the tripping of a circuit breaker. This usually allows them to have a higher lifespan than a common electromechanical relay. The efficient mosfet switches use ixys integrated circuits divisions patented optomos architecture.
This article provides an introduction to the basic operation of solidstate relays with a focus on the output devices in todays ssrs. Twidecoutput single phase ssr solid state relay 25a 332v dc to 24480v ac ssr25da. Implementation of solid state relays for power system. The offmode provides energy to the system controller and the on mode can switch fast enough to allow backup battery charging where electromechanical relays. Solid state relay it has no moving parts most of its components are static device based on semiconductor materials. Every opto 22 solidstate relay is subjected to full load test and six times the rated current surge both before and after encapsulation. The main difference is that ssrs have no moving mechanical parts within it. Keep the junction temperature within operating limits or face catastrophic results. Another type of ssr, called a random turn on solid state relay, is used to implement dimming. This isolated, bidirectional, solid state switch can control current flow into both ac and dc loads. Aac solidstate relays with coversc solidstate relays with covers series sh relays offer high performance in a. Sainsmart 5v 2a 8 channel solid state relay module high level trigger black for arduino uno duemilanove mega2560 mega1280 arm dsp pic 4. Solid state relay parallel and dc operation using the lh1525 solid state relay lh152949 telecom switches ssr modem line interface solutions t1 switching with the lh1514 solid state relay solid state relay metallic onstate surge performance ssr design using vo1263. Compact solid state relays for quantities greater than listed, call for quote.
Ambient temperature and the onstate resistance distribution of a normallyoff type ocmos fet. Solid state relays nocontact relays that semiconductor is utilized, which enables highspeed and highfrequency operation. I would like to turn on a 230v stroboscope and a sirene with a solid state relay. For an arduino project i needed to switch 4 mains devices. Omron provides solid state relay for enormous range of applications. Choose long life and silent operation with zelio relay ssr. An ir infrared noncontact temperature test instrument or thermal imager is used to measure the heat on the relay. To determine if the solid state relay is overheated, the relay is operated at full load for at least one hour. They incorporate removable touchproof terminal covers for versatile, easy, and quick connections. It is designed to control 120v, 240v or 480v up to 660v alternating current vac, and provides zero voltage switching and 2500vac isolation between the load terminals. I am always deliberating wether to use a mechanical relay or a solidstate relay.
Offering output ratings up to 25a, ac solid state relays are available for loads from low level to 25 amps240v and dc solid state relays can handle loads from low level to 2 amps60v. Solid state relay also known as ssr, ss relay, ssr relay or ssr switch is an integrated contactless electronic switch device that is compactly assembled from an integrated circuit ic and discrete components. Solid state relays serve the same function as mechanical relays but have no moving parts hence the name solid state. The device illustrated here is a relatively new type which provides optically isolated singlepole, normally closed operation. Ssrd range integrated heat sink to provide factory tested heat exchange, that easily mounts by clipping directly onto din rail. Therefore, a typical solid state relay has a lifetime of 50x to 500x operations or more. Solid state relays are available at mouser electronics from industry leading manufacturers. The solid state relay ssr are a series of singlepole, normally open, solid state switching devices with no moving parts, capable of tens of millions of cycles of operation. Application notes and general information solid state. The s216s02 solid state relay ssr is an integration of an infrared emitting diode ired, a phototraic detector and a main output traic. The heat should be no more than 75% of the relays maximum heat rating. If the lamp comes on with no control voltage, the output is shorted. In specific applications, solid state relays offer many. The circuit is composed of one led on the input side which activates an optically coupled ic on the output controlling the firing angle of two backtoback scrs.
The optomos line of solid state relays uses discrete semiconductor components and the patented optomos architecture to deliver fast, reliable, bouncefree switching in a compact design. Our solid state relays ssrs are engineered for ultrareliable switching of ac or dc loads, featuring inherently low switching noise and extremely long life. Multipole relays pose greater problems because power. Solid state relay learn how to wire a solid state relay with ease by arnold pena electrical engineer jameco technical support a solid state relay ssr is an alternative to using a classic switch when you want to turn a circuit on or off. An ssr is capable of switching ac loads where both of the output mosfets are required as well as dc loads where one mosfet or two in parallel can be used. Ad series class 6 solid state relays the class 6 solid state relays offer an energyefficient alternative to standard electromechanical relays.
Opto 22 provides a full range of reliable solidstate relays ssr. The solid state relay store powered by network solutions. Schneider electric electromechanical and solidstate zelio relays. No moving parts mean that there is no bouncing or arcing of contacts every time the relay switches current to the load. Therefore, there is no mechanical wear and tear on the output contacts. Ad series solid state relays ad70s204b shown adssr21022dcz shown a solid state relay is a relay with an isolated input and output, whose functions are achieved by using electronic components without the use of moving parts vs. It has no moving parts and thus can operate much more quickly and. Ixys ic divisions optomos solidstate relays, ac solidstate switches, and lcas products are provided in a wide variety of contact styles, blocking voltages, and current handling capabilities. The solid state output is located between terminals 1 and 2, and can be ordered as either normally open or normally closed, when voltage is applied.
In case of the dc solid state relays, there is no snubber circuit and zerocrossing control circuit. Aug 16, 2009 solid state relays ssr are able to perform many of the same tasks as electromechanical relay emrs. Etas esr10 micro iso solidstate relays were specifically designed for use in 12 v and 24 v vehicle onboard electrical systems. These relays have flexible input and output ranges and multiple footprints providing a reliable solution to any application. Our solid state relays ssrs are onoff remotely controlled switches with complete galvanic isolation from input to output. Solid state relays automation controls industrial devices. Solidstate relays frequently asked questions faqs 1.
These relays combine solid state and mechanical operation to provide long service life without the need for a heat sink. Forma solid state relays goto formb relays goto combination formab relaysgo to forma power relays. Solid state relays dc to ac single phase solid state. Low and mediumpower solidstate relays ssrs are available in dual inline and single inline packages dips and sips, respectively. Solidstate relays are switching relays that do not require the use of any mechanical parts. It s a static electronic switch unlike in an electromechanical relay where switching takes place between two moving contacts, switching in ssr takes place across the junction of semiconductor device.
Further information of solidstate relays omron industrial. These electronic relays are ideal for applications with many contact closures since solid state relay switches offer a. Solid state relays are semiconductor devices with no moving parts. Zero cross function rated output load 100240vac rated input voltage vdc price each 1 25 50 100 653g3ne205tusdc5 g3ne205tusdc5 c yes 5a 5 17. Solidstate relays the lamp bulb should not turn on until the control voltage is applied and off when control voltage is removed. Plugin type ssr, shape and size compatible with ly mechanical power relay. The zerocrossing ssr uses a phototriac coupler to isolate the input from the output see the circuit configuration on the previous page. Essentially, it is an electronic device that relies on the electrical, magnetic, and optical properties of semiconductors and electrical components to achieve its. Application, installation and maintenance of solidstate control. Ssp3a250bd solid state relay panel mounting input 432 v dc. They are semiconductor devices that either block or allow the load current to flow depending on the input to the relay. When the input signal is activated, the internal zerocrossing detector circuit triggers the triac to turn on as the ac load voltage crosses zero. The output is either 0 or 1 in the solid state relay.
A solid state relay ssr is an electronic switching device that switches on or off when a small external voltage is applied across its control terminals. Ad series class 8 solid state relays automationdirect. Upload a gerber file and make a few selections to place a custom pcb order. Ssr principle of operation automation controls industrial devices.
In terms of operation, ssrs are not very different fr om mechanical relays that have moving contacts. Solid state relay the s742 is a bidirectional, singlepole, singlethrow, normally open multipurpose relay. Abstract three phase solid state relays ssrs have been available since shortly after the introduction of single phase ssrs in 1970. The solid state relay 24v ac switch reference design is a single relay replacement that enables efficient power management for a low power alternative to standard electromechanical relays. The solid static relays was first introduced in 1960s. The solidstate technology of the esr10 offers silent invehicle switching and also makes the relay resistant to vibration and dust commonly found in vehicle applications. Designed for all types of loads, they provide output to 125a, 690vac. This type of relay basically serves the same primary function as the electromechanical relay, except that it contains no moving parts which can be advantageous in many cases. Solidstate relays used to be relatively expensive, and thus people constructed them from opto couplers and. Consist of semiconductors, so there is no contact erosion caused by switching. A solid state relay is a noncontact switch fully composed of solid state electricalelement, which can drive highcurrent load with a small control signal. There are many circumstances in which we need to control a high currentvoltage load based on the operation of a lowpower circuit, such as when using the 5v output of a microcontroller to turn on a 10a, 240v load. This data sheet includes descriptions, specifications, dimensional drawings, and application information. Components of a ssr an ssr is comprised of different kinds of semiconductor materials.
However, in most applications, especially ones where the relay must switch power to the load multiple times over a relatively short durationand the warranty runs longer. Generalpurpose relay solid state relay ssr features compact more compact than an ssr when the same load capacity is controlled. Solid state relays overview and applications california eastern. The load used in the solid state relay is a led which is used to match the level of input signal. Solid state relays are semiconductor devices with no moving parts and are thereby ideal for applications required to have longterm reliability due to highlyfrequent switching for example. If s1 is opened and reclosed, the solid state output will open or close. The typical life expectancy of a solid state relay may be more than 50 times that of an electromechanical relay. As part of this family, the cpc1709 singlepole normally open 1forma dc solid state power relay employs optically coupled mosfet technology to provide 2500vrms of input to output isolation. Broadcoms photo mosfet family consists of solid state relay products with high insulation voltage and high common mode rejection for output transient immunity. Solid state relay, ssr switch, zero crossing industrial ssr. Ssrs consist of a sensor which responds to an appropriate input control signal, a solid state electronic switching device which switches power to the load circuitry, and a coupling mechanism to enable the control signal to activate this.
These are known as static as they dont have any moving part. Sainsmart 2 channel ssr 5a dcdc 5v220v solid state relay. Rs pro 10 a rms spno solid state relay, zero cross, panel mount, triac, 280 v ac maximum load. Our lines of solid state relays includes more than 20 different models with hundreds of variations and options. Quiet operation solid state switching solutions make no. Panasonic solid state relays principle of operation. The output device scr, triac, or transistor is opticallycoupled to an led light source inside the relay. The ssr is triggered by an external voltage applied across its control terminal. Ssr principle of operation automation controls industrial. Based on hybrid architecture which allows fast switching times with a wide operating ambient temperature range. Therfore you have the flexibility to create your own relay. Thermal transfer a thermal foil is provided with each solid state relay for mounting on the base of the relay to improve heat transfer. Ad series class 6 solid state relays automationdirect. The output of the solid state relay is connected with a computer for interfacing.
It can achieve switching on and off with no contact and no spark due to the switching characteristics of electrical element i. Ssrs consist of an input logic to respond to an appropriate. Thermal management of solidstate relays when specifying a solidstate relay ssr, engineers face a daunting problem. Lcb710 is a singlepole normally closed 1formb solid state relay that uses optically coupled technology to provide an enhanced 3750v rms isolation barrier between the input and the output of the relay. Product index relays solid state relays solid state relays. For ac bidirectional operation two mosfets are arranged backtoback with their. Operation solid state relays ssr are similar to electromechanical relays, in that. To address these limitations, many relay manufacturers offer solid state relays, which use an scr, triac, or transistor output instead of mechanical contacts to switch the controlled power. Depending on the switching characteristics of the electronic components such as switching transistors, bidirectional thyristors and other semiconductor components, the ssrs are able. The life expectancy of solid state relays mean time before. Solide state relays fit perfectly for your battery charger, barometric pressure sensor and ups systems.
A high efficient gaalas ired enables low forward current on the input side. They have an isolated input that then ultimately controls the solid state switch. Static relay circuit using analog and digital ics for over current. The term static implies that the relay has no moving mechanical parts in it. Figure 1 shows a selection of high power ssrs with blocking voltages up to v and load currents up to 22. Solid state relay ssr is a noncontact switch consisting of microelec kuyini ukuthunyelwa kombuso oqinile i relay state relay ssr ingumshini ongathintana naye ohlangan. What links here related changes upload file special pages permanent link. Such as the ps7112, ps71, ps7122, ps7141, ps7142 and ps7160 ocmos fet. When s1 is closed, the solid state output between terminals 1 and 2 closes or opens. Difference between ssrs and mechanical relays ssrs solidstate relays have no movable contacts. This enables ac output solid state relays with two types of turnon response. Ssm3a325bd solid state relay din rail mount input 432vdc. This double testing of every part before it leaves the factory means you can rely on opto 22 solidstate relays. Dec long life solid state relays and contactors have no moving parts.
An ssr with very high current capabilities may need to dissipate as much as 210 watts. The ssr turns off when the ac load voltage crosses zero and the load. What is the difference between a solid state relay and a. Ssrs consist of a sensor which responds to an appropriate input control signal, a solidstate electronic switching device which switches power to the load circuitry, and a coupling mechanism to enable the control signal to activate this. The main parts sensing protection transducer and signal conversion signal conditioning filtration comparator function time delay function trip circuit circuit breaker cb relay logic relay circuit power system. A solidstate relay ssr is an electronic switching device that switches on or off when a small external voltage is applied across its control terminals. Ssrs are not very different in operation from mechanical relays that have movable contacts. Solid state relay an overview sciencedirect topics. One could conceivably make a solid state relay using magnetic isolation in various forms too, but optical isolation makes more sense for the requirements. It works the same way as a normal ssr, except that there is no zerocrossing detection circuit. An introduction to solid state relays get started to. Softstartstop function starts and stops threephase motors smoothly and economically. Ssrs, however, employ semiconductor switching elements, such as thyristors, triacs, diodes, and transistors.
Advantages of solidstate relays over electromechanical. The solid state relay can be designed to use with either ac or dc currents. The pf series ssr for all load types high reliability quality usa ssr. Our solidstate relays provide the advantages inherent in solidstate designsno moving parts or contacts that can wear outwith compatibility to industrial controllers such as plcs and temperature controllers. It endeavors to provide the products that you want, offering the best bang for your buck. Tida00751 solid state relay 24v ac switch with galvanic. A solidstate relay is an electronic switching device in semiconductor technology. G3na hockey puck style ssr with 590a output currents. So solid state relays are more than just a tranistor, triac, or whatever is used to perform the actual switching. Necs ssr is named a ocmos fet optocoupled mos fet as the input and output are isolated with a photocoupler and the mos.