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DIMENSIONS
in Inches (Millimeters)
CotoMOS® CT774/CS774
e CT774 and CS774 feature current switching capability to 80/100mA with a
low on resistance of 30/50Ω Maximum. Designed for Security, Measurement and
Instrumentation applications the CotoMOS® relay is capable of handling 400V load
conditions. If your requirements are dierent please contact your Coto Applications
Engineer for assistance through www.cotorelay.com.
CT774/CS774 Features
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Contact Form: 1A+1B
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Load Voltage: 400V Maximum
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Operation LED Current: 3.0mA Maximum
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Load Current: 100mA Maximum (NO) 80mA Maximum (NC)
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On-Resistance: 30Ω Maximum (NO) 50Ω Maximum (NC)
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Low O-State Leakage Current: 1.0μA Maximum (NO) 10μA Maximum (NC)
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I/O Breakdown Voltage: 1500Vrms Minimum
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Sux -H for I/O Breakdown Voltage: 5000Vrms Minimum
CS774CT774
TERMINAL IDENTIFICATION
8
NC NO
765
1234
(+) (-) (+) (-)
1,3: Anode (LED)
2,4: Cathode (LED)
5,6,7,8: Drain
(MOSFET)
CT774/CS774
0.020(0.5)
0.100(2.54)
0.300(7.62)
0.020(0.5)
0.162(4.1)
.118(3.0)
0.310(7.87)Max.
0.376(9.54)Max.
0.010(0.25)
0.047(1.2)
0.252(6.4)
0.398(10.1)Max.
IDENTIFIES PIN #1
0.134(3.4)
0.154(3.9)Max
.
0.004(0.1)
0.051(1.3)
0.010(0.25)
0.406(10.3)Max.
0.047(1.2)
0.252(6.4)
0.398(10.1)Max.
0.020(0.5)
0.100(2.54)
0.300(7.62)
IDENTIFIES PIN #1
COTO TECHNOLOGY, INC.For most recent data visit www.cotorelay.com
CT774/CS774 MAXIMUM RATINGS 
Ambient Temperature
: 25ºC
Parameters Symbol Units Value
INPUT SPECIFICATIONS
Continuous LED Current IFmA 50
Peak LED Current IFP mA 500
LED Reverse Voltage VRV 5
Input Power Dissipation Pin mW 75
OUTPUT SPECIFICATIONS
Load Voltage VLV (AC peak or DC) 400
Load Current ILmA 100 (NO) 80 (NC)
Peak Load Current IPeak A0.4
Output Power Dissipation POut mW 600
RELAY SPECIFICATIONS
Total Power Dissipation PTmW 650
I/O Breakdown Voltage VI/O Vrms 1500
Operating Temperature TOpr ºC -40 ~ +85
Storage Temperature TStg ºC -40 ~ +100
CT774/CS774 ELECTRICAL SPECIFICATIONS (Ambient Temperature: 25ºC)
Parameters Symbol Test Conditions Units Min Typ Max
INPUT
LED Forward Voltage VFIF=10mA V1.0 1.5
Operation LED Current IF On mA 0.9 3.0
Recovery LED Voltage VF Off V0.5
OUTPUT
On-Resistance Drain to Drain ROn IF=1mA(NO), IL=Rating
Time to ow is within 1 sec.
Ω
24(NO)
30(NC)
30(NO)
50(NC)
O-State Leakage Current ILeak IF=0mA (NO), IF=5mA (NC),
VL=400V
μ
A1(NO)
10(NC)
Output Capacitance COut IF=0mA (NO), IF=5mA (NC),
VL=0V, f=1MHz pF 115(NO)
165(NC)
TRANSMISSION
Turn-On Time TOn IF=0mA → 10mA (NC), IF=Rating ms 0.2(NO)
0.35(NC) 2.0
Turn-O Time TO IF=10mA → 0mA (NC), IL=Rating ms 0.05 1.0
COUPLED
I/O Insulation Resistance RI/O
Ω
109
I/O Capacitance CI/O f=1MHz pF 1.3
Environmental Ratings:
Operating Temp: -40°C to +85° C; Storage Temp: –40 to +100 C.
All electrical parameters measured at 25° C unless otherwise specied.