panel mount SSRCrydom has expanded its Series H1 of high voltage AC output Solid State Relays. The new models offer high levels of breakdown voltage and noise immunity (>1600 V) for applications in installations where electrical transients are common and might otherwise damage less robust SSRs. The new SSRs include AC output ratings up to 90 A at 660 VAC, with available control voltage of 4 V to 32 VDC. The Series H1 1600 Volt Blocking models feature 4000 VAC optical isolation, optional LED input status indicator, optional installed thermal pad and are available in either zero voltage or random turn-on versions. Accessories include a plastic touch safe cover, terminal lugs accepting up to 1 AWG wire, heat sinks rated from 5.0 to 0.5°C/W, and mounting hardware kits. The Series H1 is UL and cUL recognized, RoHS and China RoHS compliant, and CE certified to the EMC and Low Voltage Directives.