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DS-CPC1231N-R01.0 1
CPC1231N
4 Pin SOP OptoMOS®Relay
•Telecommunications
•Telecom Switching
•Tip/Ring Circuits
•Modem Switching (Laptop, Notebook, Pocket
Size)
•Hookswitch
•Dial Pulsing
•Ground Start
•Ringing Injection
•Instrumentation
•Multiplexers
•Data Acquisition
•Electronic Switching
•I/O Subsystems
•Meters (Watt-Hour, Water, Gas)
•Medical Equipment-Patient/Equipment Isolation
•Security
•Aerospace
•Industrial Controls
•Small 4 Pin SOP Package
•Low Drive Power Requirements (TTL/CMOS
Compatible)
•No Moving Parts
•High Reliability
•Arc-Free With No Snubbing Circuits
•1500VRMS Input/Output Isolation
•0.4mm distance through insulation (supplementary
isolation requirement of EN60950)
•No EMI/RFI Generation
•Machine Insertable, Wave Solderable
•Tape & Reel Version Available
Applications
Features
Description
Approvals
Ordering Information
CPC1231N Units
Blocking Voltage 350 V
Load Current 120 mA
Max RON 30 Ω
Pin Configuration
Part # Description
CPC1231N 4 Pin SOP (100/tube)
CPC1231NTR 4 Pin SOP (2,000/reel)
1
23
4
+ Control
Ð Control
Load
Load
CPC1231N Pinout
Switching Characteristics of
Normally Closed (Form B) Devices
Switching Characteristics of
Normally Closed (Form B) Devices
CONTROL
10ms
10%
90% 90%
+
+
T
ON
T
OFF
+
The CPC1231N is a miniature 1-Form-B solid state
relay which uses optically coupled MOSFET
technology to provide 1500VRMS of input to output
isolation and is certifide for Supplemented Isolation in
accordance with EN60950. The efficient MOSFET
switches and photovoltaic die use Clare’s patented
OptoMOS®architecture. The optically-coupled input
is controlled by a highly efficient GaAIAs infrared
LED. The CPC1231N offers board space savings of
at least 20% versus competitive 4 Pin SOP solid
state relay.
•UL Recognized Component: File #E76270
•Certified to EN60950, Supplemental Isolation
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2
CPC1231N
R01.0
Absolute Maximum Ratings are stress ratings. Stresses in
excess of these ratings can cause permanent damage to
the device. Functional operation of the device at conditions
beyond those indicated in the operational sections of this
data sheet is not implied.
Electrical Characteristics
Parameter Conditions Symbol Min Typ Max Units
Output Characteristics @ 25°C
Load Current (Continuous)
AC Peak 1IL- - 120 mA
Peak Load Current 10ms ILPK - - 350 mA
On-Resistance 2IL=120mA RON - 25 30 Ω
Off-State Leakage Current VL=350V, IF=2mA ILEAK --5µA
Switching Speeds
Turn-On IF=5mA, VL=10V TON - - 2.0 ms
Turn-Off IF=5mA, VL=10V TOFF - 2.0 ms
Output Capacitance 50V; f=1MHz COUT - 25 - pF
Capacitance
Input to Output ---1-pF
Input Characteristics @ 25°C
Input Control Current 3IL=120mA IF2 - 50 mA
Input Voltage Drop IF=5mA VF0.9 1.2 1.4 V
Reverse Input Current VR=5V IR- - 10 µA
1Load current derates linearly from 120mA @ 25oC to 100mA @ 85oC.
2Within 1 second of on time.
3For applications requiring high temperature operation (greater than 60oC) an LED drive current of 5mA is recommended.
Absolute Maximum Ratings (@ 25˚C)
Parameter Ratings Units
Input Power Dissipation 150 mW
Input Control Current 50 mA
Peak (10ms) 1 A
Reverse Input Voltage 5 V
Blocking Voltage 350 V
Total Power Dissipation 4001mW
Isolation Voltage
Input to Output 1500 VRMS
Operational Temperature -40 to +85 °C
Storage Temperature -40 to +125 °C
Soldering Temperature +220 °C
(10 Seconds Max.)
1Derate Linearly 3.33 mw / ˚C
CPC1231N
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R01.0
PERFORMANCE DATA*
*The Performance data shown in the graphs above is typical of device performance. For guaranteed parameters not indicated in the written specifications, please contact our application
department.
CPC1231N
Typical LED Forward Voltage Drop
(Ambient Temperature = 25 C)
I
F
= 5mADC
35
30
25
20
15
10
5
01.17 1.19 1.21 1.23 1.25
LED Forward Voltage Drop (V)
Device Count (N)
o
CPC1231N
Typical On-Resistance Distribution
(Ambient Temperature = 25 C)
(Load Current = 120mA)
35
30
25
20
15
10
5
023.5 24.5 25.5 26.524 25 26
On-Resistance (Ω)
Device Count (N)
o
CPC1231N
Typical Blocking Voltage Distribution
(Ambient Temperature = 25 C)
35
30
25
20
15
10
5
0395 405 415 425400 410 420
Blocking Voltage (V)
Device Count (N)
o
CPC1231N
Typical I
F
for Switch Operation
(Ambient Temperature = 25 C)
(Load Current = 120mA)
0.50 0.60 0.700.45 0.55 0.65 0.75
LED Current (mA)
Device Count (N)
25
20
15
10
5
0
o
CPC1231N
Typical I
F
for Switch Dropout
(Ambient Temperature = 25 C)
(Load Current = 120mA)
25
20
15
10
5
00.50 0.60 0.700.45 0.55 0.65 0.75
LED Current (mA)
Device Count (N)
o
CPC1231N
Typical Turn-On Time
(Ambient Temperature = 25 C)
(Load Current = 120mA; I
F
=5mA)
0.21 0.23 0.25 0.270.22 0.24 0.26
Turn-On (ms)
Device Count (N)
25
20
15
10
5
0
o
CPC1231N
Typical Turn-Off Time
(Ambient Temperature = 25 C)
(Load Current = 120mA; I
F
= 5mA)
0.50 0.70 0.90 1.101.000.800.60
Turn-Off (ms)
Device Count (N)
25
20
15
10
5
0
o
CPC1231N
Typical Load Current vs. Temperature
(I
F
=0, I
L
=AC Peak)
Temperature ( C)
Load Current (mA)
180
160
140
120
100
80
60
40
20
0-40 -20 0 20 40 60 80 120100
o
CPC1231N
Typical Blocking Voltage 
vs. Temperature
Temperature ( C)
Blocking Voltage (V
RMS
)
-40
425
420
415
410
405
400
395
390 -20 0 20 40 60 80 100
o
CPC1231N
Typical Turn-On vs. Temperature
(Load Current = 50mA)
Temperature ( C)
Turn-Off (ms)
-40
1.000
0.900
0.800
0.700
0.600
0.500
0.400
0.300
0.200
0.100
0-20 0 20 40 60 80 100
5mA
10mA
o
CPC1231N
Typical Turn-Off vs. Temperature
(Load Current = 50mA)
Temperature ( C)
5mA
10mA
Turn-On (ms)
-40
5.000
4.500
4.000
3.500
3.000
2.500
2.000
1.500
1.000
0.500
0-20 0 20 40 60 80 100
o
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4
CPC1231N
R01.0
PERFORMANCE DATA*
*The Performance data shown in the graphs above is typical of device performance. For guaranteed parameters not indicated in the written specifications, please contact our application
department.
CPC1231N
Typical LED Forward Voltage Drop
vs. Temperature
Temperature ( C)
LED Forward Voltage Drop (V)
1.8
1.6
1.4
1.2
1.0
0.8-40 -20 0 20 40 60 80 120100
50mA
30mA
20mA
10mA
5mA
o
CPC1231N
Typical Turn-On vs. LED Forward Current
(Load Current = 120mA)
LED Forward Current (mA)
(ms)
05 10 15 20 25 30 35 40 45
0.7
0.6
0.5
0.4
0.3
0.2
0.1
050
CPC1231N
Typical Turn-Off vs. LED Forward Current 
(Load Current = 120mA)
LED Forward Current (mA)
(ms)
05 10 15 20 25 30 35 40 45
2.0
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
050
CPC1231N
Typical On-Resistance vs. Temperature
(Load Current = max rated; I
F
=5mA)
Temperature ( C)
On-Resistance (Ω)
-40
40
35
30
25
20
15
10 -20 0 20 40 60 80 100
o
CPC1231N
Typical Load Current vs. Load Voltage 
(Ambient Temperature = 25 C)
I
F
=5mA
Load Voltage (V)
Load Current (mA)
150
100
50
0
-50
-100
-150 -6 -4 -2 0 2 4 6
o
CPC1231N
Energy Rating Curve
Time
Load Current (A)
10µs
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
01ms100µs 100ms 1s
10ms 10s 100s
CPC1231N
Typical I
F
for Switch Operation 
vs. Temperature
(Load Current = 50mA)
Temperature ( C)
LED Current (mA)
-40
3.000
2.500
2.000
1.500
1.000
0.500
0-20 0 20 40 60 80 100
o
Clare, Inc. makes no representations or warranties with respect to the accuracy or completeness of the contents of this publication and reserves the right to make changes to specifications and product descriptions
at any time without notice. Neither circuit patent licenses nor indemnity are expressed or implied. Except as set forth in Clare’s Standard Terms and Conditions of Sale, Clare, Inc. assumes no liability whatsoever, and
disclaims any express or implied warranty, relating to its products including, but not limited to, the implied warranty of merchantability, fitness for a particular purpose, or infringement of any intellectual property right.
The products described in this document are not designed, intended, authorized or warranted for use as components in systems intended for surgical implant into the body, or in other applications intended to support
or sustain life, or where malfunction of Clare’s product may result in direct physical harm, injury, or death to a person or severe property or environmental damage. Clare, Inc. reserves the right to discontinue or make
changes to its products at any time without notice.
Specification: DS-CPC1231N-R01.0
©Copyright 2004, Clare, Inc.
OptoMOS®is a registered trademark of Clare, Inc.
All rights reserved. Printed in USA.
1/22/04
For additional information please visit our website at: www.clare.com
Dimensions
mm
(inches)
MECHANICAL DIMENSIONS
4 Pin SOIC Narrow (“N” Suffix)
PC Board Pattern (Top View)
2.54 TYP.
(0.100 TYP.)
2.18 MAX.
(0.086 MAX.)
0.38 TYP.
(0.015 TYP.)
PC Board Pattern
(Top View)
1.448
(0.057)
0.889
(0.035)
B
0
=4.70
(0.185)
A
A
P = 8.00
(0.315)
W = 12.00 MAX
(0.472 MAX)
K
1
= 2.30
(0.091)
SECTION A-A
Tape and Reel Packaging for 4 pin SOIC package
330.2 DiA
(13.00" DiA)
Top Cover
Tape Thickness
0.102 MAX
(0.004 MAX)
K
0
= 2.7
(0.106)
Embossment
Embossed
Carrier
A
0
=6.50
(0.256)
NOTE: Tape dimensions not shown, comply with JEDEC Standard EIA-481-2