NEW Heat sinks for SSR's from Carlo Gavazzi

Sords Electric and Carlo Gavazzi announce new Heat Sinks.

CARLO GAVAZZI has launched an Extensive New Range of Heat Sinks for panel mount solid state relays to strengthen their position as a supplier of complete solid state switching solutions for a variety of applications for resistive and inductive switching/motor control.
Seventeen new heat sinks are added to an already extensive heat sink range. New types include a wide variety of sizes, different mounting methods such as DIN rail, panel and through-wall mounting, and include options for single or multiple SSR assemblies. Thermal resistance ranges from 4.0°C per watt to 0.12°C per watt. Proper heat sink selection has been improved by all new online tool and new detailed heat sink data sheets.

With the new Extended Range of Heat Sinks, CARLO GAVAZZI now offers different variations to fulfill the demanding needs from numerous markets in which our solid state relays are used.
Main technical features include:
Thermal resistance range of new heat sinks: 4.0 °C/W to 0.12 °C/W DIN rail, panel and through-the-wall mounting
Options for fan attachments
Heat sinks for single and multiple SSR assemblies
Optimized for use with Carlo Gavazzi RM, RS, RA, RZ and RGS Series relays.
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Use our Carlo Gavazzi parts form HERE or call 800-929-2845

Solid State Relays ~ Fast switching

Sords Electric sells Solid State Relays (SSR) by Carlo Gavazzi.

A Solid State relay( SSR ) is an electrical switch that opens and closes under the control of another electrical circuit. A solid state relay( SSR ) is a solid state electronic component that provides a similar function to an electromechanical relay but does not have any moving components, increasing long-term reliability. With early SSR's, the tradeoff came from the fact that every transistor has a small voltage drop across it. This voltage drop limited the amount of current a given SSR could handle. As transistors improved, higher current SSR's, able to handle 100 to 1,200 amps, have become commercially available.

A solid state contactor is a very heavy-duty solid state relay, including the necessary heat sink, used for switching electric heaters, small electric motors and lighting loads; where frequent on/off cycles are required. There are no moving parts to wear out and there is no contact bounce due to vibration. They are activated by AC control signals or DC control signals from Programmable logic controller (PLCs), PCs, Transistor-transistor logic (TTL) sources, or other microprocessor and microcontroller controls.

Solid-state relays ( SSR's ) control load currents through solid-state switches such as triacs, SCRs, or power transistors. These elements are controlled by input signals coupled to the switched devices through isolation mechanisms such as transformers, reed relays, or optoisolators. Some solid-state relays also incorporate snubber circuits or zero-crossing detectors to reduce spikes and transients generated by interrupting load current. Since semiconductor switches can dissipate significant amounts of power, solid-state relays must generally be heat sinked to minimize operating temperature.

SSRs generate heat because of the voltage drop present in all semiconductor devices. A 40-A relay, for example, typically drops 1.2 V during conduction and, thus, dissipates 50 W of heat. However, SSR heat generation generally does not require special system design. These devices usually mount on circuit boards or control panels containing other semiconductor devices. Cooling and heat-sinking methods used for these devices are likely to be adequate for the SSR.

Some SSRs designed for controlling ac loads incorporate a zero-voltage turn-on circuit that switches the load on or off only when the power-line sine wave passes through zero. Highly capacitive loads such as lamps and heaters which produce high inrush currents at turn on generate little electromagnetic interference if actuated when line voltage is zero. However, inductive loads such as motors and transformers can saturate during the first half cycle after turn on and produce maximum interference when switched on as line voltage passes through zero. Zero-voltage switches should not be used.

Carlo Gavazzi offers a comprehensive range of solid state relays (SSR’s) featuring direct copper bonding technology for increased life and reliability. SSR’s are used extensively in the plastics, packaging, food processing, and HVAC industries - primarily for temperature control. They are the logical replacement for mercury contactors.

Other applications include lighting and pump switching. Furthermore, many of our relays feature horsepower ratings making them suitable for controlling motorized dampers in HVAC control systems - where their long life and noise-free switching make them ideal replacements for mechanical contactors.

Carlo Gavazzi's range includes single phase relays up to 125 amps and 3 phase relays up to 75 amps. They are available with both digital and analogue inputs (4-20 mA or 0-10 V) Furthermore, we also offer a complete range of SSR's with a built-in heatsink.

Sords Electric

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