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The 645T series of solid state relays uses triacs for on/off 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 50 amps and up to a nominal voltage of 480VAC. Both random turn on or zero cross is available.

Additional contact configurations and coil options are available – please use the RFQ/RFI tab above to submit your request.
UL Recognized          RoHS Compliant
645T Series - Solid State On / Off Relays
645T Series - Solid State On / Off Relays - Dimensional Picture
Unit of Measure
Items 645T Series - Solid State On / Off Relays
645TZ410-3-32VDC
645T Series - Solid State On / Off Motor Relays
645T Series - Solid State On / Off Relays
645TZ425-3-32VDC
645T Series - Solid State On / Off Motor Relays
645T Series - Solid State On / Off Relays
645TZ440-3-32VDC
645T Series - Solid State On / Off Motor Relays
645T Series - Solid State On / Off Relays
645TR410-3-32VDC
645T Series - Solid State On / Off Motor Relays
645T Series - Solid State On / Off Relays
645TR425-3-32VDC
645T Series - Solid State On / Off Motor Relays
Series N/A 645T
Input Voltage N/A 3-32 VDC
Input Characteristics N/A DC
Must Release Voltage N/A 1VDC
Maximum Input Current N/A 80 mA
Reverse Polarity Protection N/A Yes
Output Characteristics N/A 10 A N/A 25 A N/A 40 A N/A 10 A N/A 25 A
Min. Load current to maintain on N/A 100 mA N/A 120 mA N/A 250 mA N/A 100 mA N/A 120 mA
Non-Repetitive Surge Current (1 cycle) N/A 100 A N/A 250 A N/A 300 A N/A 100 A N/A 250 A
Maximum I2T for Fusing (Asquared sec) N/A 50A2 S N/A 312A2 S N/A 450A2 S N/A 50A2 S N/A 312A2 S
Suggested Heatsink N/A 1.0 ºC/W N/A 0.14 ºC/W N/A 0.14 ºC/W+FAN N/A 1.0 ºC/W N/A 0.14 ºC/W
Load Voltage Range N/A 50 to 480VAC
Frequency Range N/A 47 to 63 Hz
Peak Blocking Voltage N/A 800 to 1200
Maximum Rate of Rise Off State Voltage (dv/dt) N/A 250 V/uS
Max. Off state leakage current (rms) N/A 10 mA
Max. On State Voltage Drop N/A 1.6 VAC
Maximum Turn-On Time at 60 Hz N/A 8.3 ms
Maximum Turn-Off Time at 60 Hz N/A 8.3 ms
Dielectric Strength - I or O to case N/A 4000 Vrms
Operating Temperature Range N/A -30 to 80 ºC
Storage Temperature Range N/A -40 to 100 ºC
Weight N/A 320 g
Input Terminal Size N/A M3.5
Output Terminal Size N/A M4