Document Number: 83838
www.vishay.com
Revision 06-March-02
3177
LH1546AT/AAB/AABTR
1 Form A
Solid State Relay
FEATURES
Current Limit Protection
l/O Isolation, 5300 V
RMS
Typical R
ON
20
Load Voltage 350 V
Load Current 120 mA
High Surge Capability
Linear, AC/DC Operation
Clean Bounce Free Switching
Low Power Consumption
High Reliability Monolithic Receptor
SMD lead available on tape and reel
Equivalent to CP Clare LCA110
AGENCY APPROVALS
UL File No. E52744
BSI/BABT Cert. No. 7980
FIMKO Approval
CSA Certification 093751
APPLICATIONS
General Telecom Switching
On/off Hook Control
Ring Delay
Dial Pulse
Ground Start
Ground Fault Protection
Instrumentation
Industrial Controls
See Application Note 56
DESCRIPTION
The LH1546 is robust, ideal for telecom and ground
fault applications. It is a SPST normally open switch (1
Form A) that replaces electromechanical relays in many
applications. It is constructed using a GaAIAs LED for
actuation control and an integrated monolithic die for
the switch output. The die, fabricated in a high-voltage
dielectrically isolated technology, is comprised of a
photodiode array, switch control circuitry and MOSFET
switches. In addition, it employs current-limiting cir-
cuitry which meets FCC 68.302 and other regulatory
voltage surge requirements when overvoltage protec-
tion is provided.
Part Identification
Part Number
Description
LH1546AT
6-pin DIP, Tubes
LH1546AAB
6-pin SMD, Tubes
LH1546AABTR
6-pin SMD, Tape and Reel
.014 (.35)
.010 (.25)
.150 (3.81)
.110 (2.79)
.150 (3.81)
.130 (3.30)
.020 (.051) Min.
.300 (7.62)
Typ.
.035 (0.90)
.031 (0.80)
.100 (2.54) Typ.
.039
(1.00)
Min.
.022 (0.55)
.018 (0.45)
.256 (6.50)
.248 (6.30)
.343 (8.70)
.335 (8.50)
Pin One ID.
6
5
4
1
2
3
18
Typ.
.347 (8.82)
.300 (7.62)
4
Typ.
.343 (8.71)
.335 (8.51)
.256 (6.50)
.248 (6.30)
Pin one I.D.
.039
(0.99)
min.
.150 (3.81)
.130 (3.30)
.100 (2.54)
.052 (1.33)
.048 (1.22)
4
.040 (1.016)
.020 (0.508)
.0098 (.25)
.0040 (.10)
.012 (0.31)
.008 (0.20)
.300 (7.62)
.395 (10.03)
.375 (9.63)
3
to 7
18
min.
.315 (8.00)
typ.
.050 (1.27) typ.
4
6
5
1
2
3
S'
S
DC
S
S'
Package Dimensions in Inches (mm)
DIP
SMD
Document Number: 83838
www.vishay.com
Revision 06-March-02
3178
Electrical Characteristics,
T
A
=25
C
Minimum and maximum values are testing requirements. Typical values are characteristics of the device and are the result of
engineering evaluations. Typical values are for information only and are not part of the testing requirements.
Parameter
Symbol
Min.
Typ.
Max.
Units
Test Conditions
Input
LED Forward Current, Switch Turn-on
I
Fon
--
1.1
2.0
mA
I
L
=100 mA, t=10 ms
LED Forward Current, Switch Turn-off
I
Foff
0.2
1.0
--
mA
V
L
350 V
LED Forward Voltage
V
F
1.15
1.26
1.45
V
I
F
=10 mA
Output
ON-resistance, ac/dc: Pin 4 () to 6 ()
R
ON
--
28
35
I
F
=5.0 mA,
I
L
=50 mA
ON-resistance, dc: Pin 4, 6 (+) to 5 (-)
--
7.0
10.0
I
F
=5.0 mA,
I
L
=100 mA
OFF-resistance
R
OFF
0.5
300
--
G
I
F
=0 mA,
V
L
=100 V
Current Limit ac/dc
I
LMT
170
210
250
mA
I
F
=5.0 mA, t=5.0 ms
V
L
=6.0 V
Off-state Leakage Current
I
O
--
0.35
200
nA
I
F
=0 mA,
V
L
=100 V
--
0.096
1.0
A
I
F
=0 mA,
V
L
=350 V
Output Capacitance, Pin 4 to 6
C
O
--
18
--
pF
I
F
=0 mA,
V
L
=1.0 V
--
6.7
--
pF
I
F
=0 mA,
V
L
=50 V
Switch Offset
V
OS
--
0.3
--
V
I
F
=5.0 mA
Transfer
Input/Output Capacitance
C
ISO
--
0.67
--
pF
V
ISO
=1.0 V
Turn-on Time
t
on
--
1.14
3.0
ms
I
F
=5.0 mA,
I
L
=50 mA
Turn-off Time
t
off
--
0.71
3.0
ms
I
F
=5.0 mA,
I
L
=50 mA
Absolute Maximum Ratings,
T
A
=25
C
Stresses in excess of the Absolute Maximum Ratings can cause permanent
damage to the device. These are absolute stress ratings only. Functional opera-
tion of the device is not implied at these or any other conditions in excess of
those given in the operational sections of the data sheet. Exposure to maximum
rating conditions for extended periods can adversely affect device reliability.
Ambient Temperature Range ........................................... 40 to +85C
Storage Temperature Range .......................................... 40 to +150C
Soldering Temperature (t=10 s max.) ......................................... 260C
Isolation Test Voltage (for 1.0 s) ........................................... 5300 V
RMS
Isolation Resistance
V
IO
=500 V,
T
A
=25C ............................................................
10
12
V
IO
=500 V,
T
A
=100C ..........................................................
10
11
SSR Output Power Dissipation (continuous)............................ 550 mW
LED Continuous Forward Current ............................................... 50 mA
LED Reverse Voltage (
I
R
10 mA) ................................................. 8.0 V
DC or Peak AC Load Voltage (
I
L
50 mA) .................................... 350 V
Continuous DC Load Current at 25C
Bidirectional...........................................................................120 mA
Unidirectional......................................................................... 200 mA
Recommended Operating Conditions
120
100
80
60
40
20
0
-40
-20
0
20
40
60
80
Ambient Temperature (
C)
Load Current (mA)
I
Fon
= 5 mA
I
Fon
= 3 mA
I
Fon
= 2 mA
Document Number: 83838
www.vishay.com
Revision 06-March-02
3179
Typical Performance Characteristics
Figure 1. LED Voltage vs. Temperature
Figure 2. LED Forward Current vs. LED Forward Voltage
Figure 3. LED Reverse Current vs. LED Reverse Voltage
Figure 4. LED Current for Switch Turn-on vs. Temperature
Figure 5. LED Dropout Voltage vs. Temperature
Figure 6. Load Current vs. Load Voltage
AMBIENT TEMPERATURE (C)
LED FORWARD VOLTAGE (V)
1.6
1.5
1.4
1.0
1.3
1.2
1.1
40 20
0
20
40
60
80
I
F
=50 mA
I
F
=20 mA
I
F
=5.0 mA
I
F
=10 mA
I
F
=1.0 mA
I
F
=2.0 mA
0
2 0
4 0
6 0
8 0
1 0 0
1 2 0
0
0 .5
1
1 .5
2
LED Forward Current (mA)
LED forward Voltage (V)
T = 85
C
T = 25
C
T = 40
C
0
2
4
6
8
1 0
0
2 0
4 0
6 0
8 0
1 0 0
LED Current (uA)
Reverse LED Voltage (V)
T = 40
C
T = 25
C
T = 85
C
200
150
100
50
0
-50
-40
-20
0
20
40
60
80
Ambient Temperature (
C)
I
L
= 100 mA
LED Forward Current for Switch
T
urn-on (%), Normalized to 25
C
1 . 0 2
1 . 0 6
1 .. 1
1 . 1 4
1 . 1 8
1 . 2 2
1 . 2 6
4 0
2 0
0
2 0
4 0
6 0
8 0
Temperature (
C)
LED forward Voltage (V)
I
L
= 100 mA
0
1
2
3
4
5
Load Voltage (V)
Current Limit (
A)
T = 40
C
T = 25
C
T = 85
C
I
F
= 5 mA
300
250
200
150
100
50
0
Document Number: 83838
www.vishay.com
Revision 06-March-02
3180
Figure 7. Current Limit vs. Temperature
Figure 8. Switch Breakdown Voltage vs. Load Current
Figure 9. Switch Offset Voltage vs. LED Current
Figure 10. ON-Resistance vs. Temperature
Figure 11. Variation in ON-Resistance vs. LED Current
Figure 12. Switch Capacitance vs. Applied Voltage
40
30
20
10
0
-10
-20
-30
Change in Current Limit (%) Norm. to 25
C
I
F
= 5 mA
V
L
= 6 V
Temperature (
C )
-40
-20
0
20
40
60
80
60
50
40
30
20
10
0
Load Current (
A)
Breakdown Voltage (V)
T = 40
C
T = 25
C
T = 85
C
I
F
= 0 mA
I
L
< 50
A
0
100
200
300
400
500
0.0
0.5
1.0
1.5
2.0
2.5
25
35
45
55
65
75
85
Temperature (
C)
Switch Offset Voltage (microvolt)
I
F
= 5 mA
I
F
= 5 mA
I
L
= 50 mA
Temperature (
C)
Change in Ron (%), norm. to 25
C
40
30
20
10
0
-10
-20
-30
-40
-40
-20
0
20
40
60
80
- 2
0
2
4
6
8
0
4
8
1 2
1 6
2 0
ac/dc Ron Variation (%) norm. @ IF= 5mA
LED Forward current (mA)
I
F
= 5 mA
0
1 0
2 0
3 0
4 0
5 0
0
2 0
4 0
6 0
8 0
1 0 0
Capacitance (pF)
Applied Voltage (V)
I
F
= 0 mA
Document Number: 83838
www.vishay.com
Revision 06-March-02
3181
Figure 13. Insertion Loss vs. Frequency
Figure 14. Output Isolation
Figure 15. Leakage Current vs. Applied Voltage at
Elevated Temperatures
Figure 16. Switch Breakdown Voltage vs. Temperature
Figure 17. Switch Offset Voltage vs. Temperature
Figure 18. Turn-On Time vs. Temperature
Frequency (Hz)
0.6
0.0
Inser
tion Loss (dB)
0.5
0.4
0.2
0.1
10
2
10
3
10
4
10
5
0.3
R
L
=600
I
F
=5 mA
0
2 0
4 0
6 0
8 0
10 0
12 0
Isolation (dB)
Frequency (Hz)
V
P
= 10 V
R
L
= 50
1000
10000
100000
1000000
0.1
1.0
10.0
100.0
1000.0
0
50
100
150
200
250
300
350
Load voltage (V)
Leakage Current (nA)
T = 85
C
T = 70
C
T = 50
C
I
F
= 0 mA
T = 25
C
CHANGE IN BREAKDOWN VOLTAGE (%)
NORMALIZED TO 25
C
8
0
4
2
6
6
8
4
10
2
AMBIENT TEMPERATURE (C)
40
20
0
20
40
60
80
0.0
0.5
1.0
1.5
2.0
2.5
25
35
45
55
65
75
85
Temperature (
C)
Switch Offset Voltage (microvolt)
I
F
= 5 mA
Chang
e
in T
urn-On Time
(%)
norm.
to 25
C
Temperature (
C)
10
6
2
-2
-6
-10
-40
-20
0
20
40
60
80
I
F
=5 mA
I
L
=50 mA
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