Crydom enhances solid-state relay current ratings
A Crydom International product story
Edited by the Electronicstalk editorial team Nov 4, 2009
Crydom has introduced enhanced one-cycle surge current and I2T ratings in the 30A CKRA/CKRD series 22.5mm solid-state relays.
Higher surge and I2T ratings are made possible by utilising larger power semiconductors, providing greater current handling capabilities.
The 30A's one-cycle surge current and I2T ratings are now in excess of the previously published specifications.
Utilising oversized SCR die and with a mechanical and thermal design, the CKRxx30 relays have a 1,140/1,200Apk (50/60Hz) one-cycle surge-current rating and a 6,500/6,000A2S (50/60Hz) I2t rating.
These ratings make the CKR 30A series suitable for use in heavy industrial applications where surge currents may be of significant concern, or where branch-circuit protection is provided by slower reacting circuit breakers.
Additional features and benefits of the CKR series include a 22.5mm DIN-mount package, integral heat sink that eliminates the need for additional thermal calculations and assembly, LED input status indicator, 4000V optical isolation, cage-clamp terminals, optional internal overvoltage protection and an internal RC snubber network.
They are available with output ratings up to 30A at 530V AC with zero-crossing (resistive loads) or random turn-on (inductive loads) switching.
They are also available with a 4-32V DC, 90-280V AC or 18-36V AC input.
The CKR series solid-state relays are UL recognised, CSA certified, VDE approved and RoHS and CE compliant.
Crydom's CKR series are suitable for a variety of applications, including resistive heating, motor, and lighting-control systems.
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