645T Series - Solid State On / Off
10 - 40 Amp
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.
3/13 www.struthers-dunn.com (843) 664-3303
Output Characteristics 10 Amp 25 Amp 40 Amp
Min. Load current to maintain on
Non-Repetitive Surge Current (1 cycle)
Maximum I2T for Fusing (Asquared sec)
Suggested Heatsink °C/W
Load Voltage Range
Frequency Range
Peak Blocking Voltage
Maximum Rate of Rise Off State Voltage (dv/dt)
Max. Off state leakage current (rms)
Max. On State Voltage Drop
Maximum Turn-On Time @ 60 Hz
Maximum Turn-Off Time @ 60 Hz
100mA
100A
50A2 S
1.0°C/W
50 to 480VAC
47 to 63 Hz
800 to 1200
250V/uS
10mA
1.6VAC
8.3mS
8.3mS
120mA
250A
312A2 S
0.14°C/W
50 to 480VAC
47 to 63 Hz
800 to 1200
250V/uS
10mA
1.6VAC
8.3mS
8.3mS
250mA
300A
450A2 S
0.14°C/W+FAN
50 to 480VAC
47 to 63 Hz
800 to 1200
250V/uS
10mA
1.6VAC
8.3mS
8.3mS
Miscellaneous Characteristics
Dielectric Strength - I or O to case
Operating Temperature Range
Storage Temperature Range
Weight
Input Terminal Size
Output Terminal Size
4000Vrms
-30 to 80°C
-40 to 100°C
320g
M3.5
M4
GENERAL SPECIFICATIONS (@ 25° C)
E52197
Input Characteristics DC Input AC Input
Input Voltage
Must Release Voltage
Maximum Input Current
Reverse Polarity Protection
3 - 32VDC
1VDC
80mA
Yes
90 - 280 VAC
10VAC
30 mA
N/A
$ 64
Section 3
645T Series - Solid State On / Off
10 - 40 Amp
3/14
www.struthers-dunn.com (843) 664-3303
Motor Relays
15 - 75 Amp
Outline Dimensions
Dimensions Shown in inches & (millimeters)
2.93
(74.6)
2.18
(55.4) 1.88
(47.7)
.75
(19.1)
3.72
(94.6)
4.14
(105.1)
.83
(21.6)
.21
(5.3)
1.29
(32.8)
.93
(23.5)
Derating Curve
Maximum ambient temperature (°C)
45
40
35
30
25
20
15
10
0 10 20 30 40 50 60 70 80
Load current (Amps)
1.17
(29.7)
.02
(.5)
Ø .50
(12.7)
Ø .21
(5.3)
Solid State On/Off Wire Diagram
+
-
L1
L2
L3
440VAC
F1 F2 F3
R S T
U V W
Motor
3
Ordering Code 645 T Z or R 4 10 3-32VDC
Series
645
Switching
Triac - CODE T
Turn on
Zero cross - CODE Z
Random turn on CODE R
Load Voltage
480VAC - CODE 4
Maximum Load Current
10, 25, 40 (Amp)
Input Voltage
3-32VDC
90-280VAC
