STRUTHERS-DUNN 645SZ450-90-280VAC Solid State Relay, 3PST-NO, 50A, Panel, Screw, 50VAC, 480VAC
The 645S series of solid state relays uses back to back SCRs for control of three phase loads. Switch configuration is 3 pole Normally Open. Inputs can be AC or DC operated. Load currents range from 50 to 75 amps with a voltage rating up to 480 VAC. Both random turn-on or zero cross versions are available.
**Features
* **Motor Control**
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* SCR Controlled**
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* Up to 75 Amp Switching Capability**
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* No Moving Parts**
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* Random Turn-On and Zero Cross Available**
Specifications
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* Rated Load Current RMS: 10 A**
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* Min. Load Current to Maintain On: 100 mA**
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* Load Voltage Range: 50 to 480 VAC**
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* Frequency Range: 47 to 63 Hz**
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* Peak Blocking Voltage: 800 to 1200 V**
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* Max. Off State Leakage Current RMS: 10 mA**
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* Maximum Turn-On Time @ 60 Hz: 8.3 mS**
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* Maximum Turn-Off Time @ 60 Hz: 8.3 mS**
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* Dielectric Strength: 4000 VRMS**
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* Operating Temperature Range: –30 to 80°C**
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