RKC InstrumentRKC Instrument announces two power control series, the SSNP single-phase control type and the SSNZ for zero-cross control. Both series are a narrow 21.5 mm to allow for close mounting, either vertically or horizontally by Din rail mounting or screw mounting. The SSNP and the SSNZ are available in 15 amp or 25 amp. Response to a setting input change is one cycle or less. Other functions include a ramp-up/ramp-down auto-detecting power frequency that selects the power supply of 50 Hz or 60 Hz, and the series allows manual control.