Finder has announced the introduction of the 41.81 series of solid-state relays, which offer silent, high-speed switching of AC or DC loads, to meet the need for relays that operate reliably at rapid machine cycle rates, with minimum maintenance and without incurring mechanical wear.

The 41.81 series is aimed at designers and system integrators of automation and processing equipment, including mechanical handling, assembly and filling machines, and will be particularly suited to applications requiring high operating speed and long electrical life, especially those where silent operation is also desirable.

The solid-state relays are available in AC and DC output switching types. Type 41.81-9024 switches 1.5V to 35V DC, nominally 24V, at current levels up to 5A. Type 41.81-8240 switches 240V AC nominal (12 – 275V max.) at 3A, and features zero crossing switching to minimise electrical interference. Both models feature a low power 0.2W coil. Maximum peak current is rated at 120A for a period of 10ms, making the relays suitable for use with high inrush inductive or capacitive loads.

The relays are housed in a small, low profile, wash-tight RT111 package with an industry standard pin layout. The package offers flexibility in mounting options: it is suitable for mounting either directly onto a PCB or into a 93 series socket, which in turn can either be fixed to a PCB or mounted onto a 35mm DIN rail.

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Big Power in a Small Package!  Crydom PCB Mount Solid-State Relays Reduce Panel Space Requirements While Maintaining Power Capabilities

Crydom, an operation of Custom Sensors & Technologies (CST) and North American Leader in solid state relays, announces the most extensive line of standard and custom PCB mount power solid state relays available to the European and Asian markets. These relays offer ratings from 1 amp to 25 amps (forced air) at line voltages up to 660Vac., which makes them ideal for literally hundreds of commercial and industrial switching applications. Their compact design is also well suited for high-density PCB applications. Moreover, these relays contain no moving parts, which provides for silent operation and life expectancies at full-load current in excess of 50 times most electromechanical relays.

These compact solid state relays are ideal for use in numerous commercial & industrial applications, including: electromechanical relay replacement, pump control systems, gaming equipment, vending machines, security systems, medical equipment, solenoid control, packaging equipment, printing machines, and much more.

Versions are available with either a zero-crossing (resistive loads) or random turn-on (inductive / phase control loads) output. UL Recognition, CSA Certification, VDE Approval, and CE Compliance available on most models.

• Ratings up to 25A (forced air) @ 660V AC
• SCR output for heavy industrial or commercial loads (most versions)
• Available in standard in-line, mini in-line, or dual in-line packages
• Life expectancy in excess of 50x typical electro- mechanical relays at full-load current
• No moving parts eliminates all acoustical noise
• Not sensitive to magnetic fields
• Custom models available upon request
• RoHS Compliant

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Crydom Solid State Relays (SSRs) are utilized in the lighting industry in a wide range of applications. Beside the obvious on-off supply control, or for the remote power switching points for centralized automated control, Crydom SSRs find widespread use in high power dimming systems for theatrical, industrial and residential applications, as well as airport lighting controls, parking lot lighting, safety lights and energy saving systems for commercial and industrial lighting.

The Crydom MCPC series of microprocessor based proportional controller/SSR modules significantly reduce the amount of design effort and components required to incorporate phase angle dimming control in lighting systems while improving reliability and life.

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Crydom Solid State Relays (SSRs) are widely used in the heating industry. By specifying the Random Turn-on versions, Crydom SSR’s can be used as proportional controllers for varying power to resistance type heaters. Applied in a more basic way, when used in conjunction with “on-off” style temperature controllers, Crydom SSRs can be used as a power cycling switch without concern for contact arcing, burning, or the resultant reduction of life expectancy.

With the wide range of SSR types available, Crydom relays can be selected and used to control Quartz lamp, ceramic, infrared, CalRod, cartridge, immersion, strip, and band type heaters among many others. In addition, SSR’s can control fuel valves, blower motors, damper motors, and serve as the interface between thermostats and their primary equipment.

The Crydom MCTC Series of micro-controlled SSR/temperature controllers can be used as a stand alone temperature controller where a compact, low cost solution is required. The MCTC eliminates the need for a separate controller and SSR assemblies, by combining both into one standard size SSR package.

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Crydom Solid State Relays (SSRs) are widely used in the food equipment industry as replacement to mercury contactors and electromechanical relays because of their ability to work in harsh environments. Since there are no moving parts contact wear is eliminated and their semiconductor based design makes them environmentally safe to be used in most applications including; ovens, fryers, heaters broilers, food warmers and holding equipment, and coffee makers.

Their epoxy sealed design even allows use in moisture prone applications such as produce misting systems found in grocery stores. Using Random Turn-on type Crydom SSR’s provides the ability to vary the available power to resistance type heaters by using burst control and with the availability of the new Crydom MC series of Temperature Proportional and Burst control products, the solutions are even easier than before.

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E-T-A Circuit Breakers has introduced a cost-optimised version of its cubic-version Smart Power Relay, called the E-T-A E-1048-8D, or DICE variant. It combines the capability of a remotely controllable electronic load disconnecting relay with self-limiting characteristics, and optimised overcurrent protection similar to that of a high quality circuit breaker. Fitting standard automotive power relay sockets, the all-in-one solid-state power controller module replaces both an electromechanical relay, with inherent contact deterioration, and a blade fuse. It is suitable for wide ranging 12/24V DC applications where solenoids, motors or lamp loads have to be switched, protected or monitored, including use in vehicles, on land and sea, in telecommunications, and in the process industry.

"A remotely controllable electronic switching relay offering circuit breaker protection"

The new E-T-A E-1048-8D Smart Power Relay is packaged in a 30mm x 30mm x 30mm housing for direct plug-in mounting to standard relay sockets. It is offered in nine different current ratings from 1A to 25A, for use in ambient temperatures from –40C up to +85C without the need for de-rating. The ENTRY version offers a short-circuit proof switching output in addition to the electronic relay function: the ENTRY-Protect version provides additional rapid electronic disconnection in the event of an overload. The tripping characteristic is similar to that of a quality circuit breaker, thus providing added protection and avoiding nuisance tripping.

Compared to a traditional electro-mechanical relay, the use of power electronics for internal switching means the Smart Power Relay is effectively ‘wear-free’ and insensitive to shock and vibration. It also uses far less power than an electro-mechanical relay. For switching and monitoring higher loads than 25A, several units can be wired in parallel. The new DICE versions are different from the CUBIC models as they do not offer features such as diagnostic LEDs and electronic status signals.

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Finder has announced an update to its 56 series relays, which now provide enhanced functionality during installation and test.

The updated series of 2-pole and 4-pole power relays feature as standard on all models a test button and mechanical indicator for manual operation during test and commissioning. The full range now offers as options an indicator LED to show operational status; in particular the DC coil versions feature twin LEDs, making them insensitive to polarity. All of the models feature a new printed front plate showing the full part number, contact rating and coil voltage, and both the new pushbutton and the coil housing are colour-coded for rapid visual identification of AC or DC models.

The six models in the 56 series provide the capability of switching higher current loads with the option of up to four changeover contacts. They are typically used by OEMs, panel builders and end users in applications including the switching of single phase motors, solenoid operation with feedback monitoring signals, multi-element heating loads and various types of lighting. The provision of plug-in, PCB and an extended range of rail and flange-mounting options and adaptors, along with a complementary range of sockets, suppression modules and accessories, allows maximum flexibility of both mounting and connection.

Standard contact material is cadmium-free, but alternative contact materials are on offer to suit inductive or capacitive loads.

The relays are rated as standard at up to 12A at 250V AC with maximum peak values of 20A and 400V AC. A 400V AC coil version is also available for use in industrial applications where a neutral connection is not available.

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Finder has announced the launch of a new series of safety relays that have been specifically designed to meet the increasingly stringent safety standards now being imposed on designers and manufacturers of electrical systems. They are particularly suited to applications such as plant, process and machine guarding, safety circuits, emergency stop circuits and critical monitoring circuits.

The 50 Series relays are pin-compatible with the existing 40 Series, and feature forcibly guided contacts that enable positive monitoring of the contact state to comply with EN 50205 type B. They have also been designed to meet the requirements of IEC 62061 (2005): Safety of machinery – Functional safety of safety-related electrical, electronic and programmable electronic control systems, and ISO 13849-1: Safety of machinery – Safety-related parts of machinery.  A high physical separation ensures a minimum of 2.5kV insulation between adjacent contacts

The relays are rated for a maximum contact current of 8A and for DC coil voltages ranging from 5V to 125V, thus providing considerable flexibility for circuit designers.

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The 4C Series is a new series of single-pole and two-pole relay interface modules from Finder that incorporate Finder’s flagship 46 Series miniature industrial relays, and are available in either screw terminal or screwless socket types. The modules provide an ideal interface between programmable logic controllers (PLC) or other electronic controllers and external actuators or switching devices, where outputs are required to switch higher than normal external loads such as large contactors, solenoids, small motors or heating elements.

The 4C.01 and 4C.02 are respectively a single-pole 16A and a two-pole 8A relay interface module, both with screw terminal connections, while the 4C.51 is a screwless single-pole model rated as 10A and the 4C.52 is an 8A two-pole screwless version. All four models are available with either AC or DC coils, and can be mounted on a 35mm DIN rail (EN 50022). They feature instant ejection of the relay from the socket by means of a plastic retaining clip, and include as standard both a supply status indication and coil suppression module.

An 8-way jumper link is available as an optional extra for use with the 4C.01 and 4C.02 modules, and reduces the time taken to wire common connections.

The 4C.01 and 4C.02 screw-type terminal modules both measure 82.9mm long x 64.6mm high x 15.8 mm wide, while the screwless 4C.51 and 4C.52 versions both measure 95.6mm long x 61.7 mm high x 15.8 mm wide. The cadmium-free relay contacts are fabricated from silver nickel (AgNi) material.

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Finder introduces the 72.31 three-phase monitoring relay, which is used for detecting a loss of phase or incorrect phase rotation when using three-phase supplies. This compact relay is ideally suited for the protection of motors in plant and machinery, and helps to satisfy the mandatory requirement of ensuring the correct rotation of motors in transportable equipment.

The 72.31 allows OEMs, panel builders and installers of control systems to ensure that motors do not become permanently damaged due to phase loss, and also to avoid potential hazards or damage due to incorrect rotation of the motors. The relay features positive safety logic, which triggers the contact to open if an error is detected so that the system will fail to a safe condition. The wide supply voltage specification allows a single unit to be used across the full three-phase supply voltage range of 208V to 480V AC.

The relay provides reliable monitoring of phase loss, even under conditions where the lost phase may be “regenerated” by the action of the rotating motor. This phenomenon is not uncommon, and many monitoring relay units that are currently available may falsely detect this phase regeneration and thus fail to disconnect the supply, which can cause damage to the motor. The 72.31 can discriminate phase regeneration up to 80% of the line voltage.

Featuring a SPDT output contact rated at 6A (maximum peak 15A), the 72.31 monitoring relay is enclosed in a compact housing measuring 84mm high x 56.5mm deep x 17.5mm wide. The narrow profile offers considerable saving in panel space.

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