... phase Solid State Relay)1, Features: Imported electrical parts,high switching speed,no-spark,dedication in size ... . corrossion resisting,quake and explosion-proof,reliable quality,long work life.2, Sorting: Single/3-phase Solid State Relay,DC/AC Solid State Relay,medium/high-power solid state relay ... product:Panel Meter Counter Timer,Timer Relay Temperature/Humidity Controller Current/Voltage/Power ...