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Valad SCR controls are of the zero voltage fired type (eliminate radio noise).

Vibration tested I/A/W MIL-STD-167-1.
Sub-Section Three/Remote Solid State (SCR) Ventilation Duct Heater
Unit of Measure

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Item #

Amperage Ratings

Voltage

Phase

Components Available

Construction

SCR N/A 30 A60 A100 A N/A 120 V220 V240 V440 V480 V N/A 1 PH 3 PH N/A Fan interlock Fusing Step down transformers Temperature controller Terminal blocks for remote connections Thermocouple feedback Through the cover disconnect switch N/A 16 GA 302/304 stainless steel control box Cover hold down straps Gasketed for water tightness NEMA 4 rated Mounting Holes Provided