645S Series - Solid State On / Off Motor Relays On Struthers-Dunn

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The 645S series of solid state relays uses back to back SCRs for on/control of three phase loads. Operation is three pole normally open. Inputs can be AC or DC operated. Load currents can range from 10 to 75 amps and up to a nominal voltage of 480VAC. Both random turn on or zero cross construction is available.

Additional contact configurations and coil options are available – please use the RFQ/RFI tab above to submit your request.

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Item #	Input Voltage	Output Characteristics

645SZ475-3-32VDC	N/A 3-32 VDC	N/A 75 A
645SR450-3-32VDC	N/A 3-32 VDC	N/A 50 A
645SZ450-90-280VAC	N/A 90-280 VAC	N/A 50 A
645SZ475-90-280VAC	N/A 90-280 VAC	N/A 75 A
645SR450-90-280VAC	N/A 90-280 VAC	N/A 50 A
645SR475-90-280VAC	N/A 90-280 VAC	N/A 75 A

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Input Voltage

Output Characteristics