VISHAY
LH1525AT/ AAB/ AABTR
Document Number 83823
Rev. 1.3, 14-Jul-04
Vishay Semiconductors
www.vishay.com
1
4
6
5
S'
S
DC
1
2
3
S
S'
i179001
DIP
SMD
1 Form A Solid State Relays
Features
Extremely Low Operating Current
High-speed Operation
Isolation Test Voltage 5300 V
RMS
Current-limit Protection
High Surge Capability
dc-only Option
Clean, Bounce-free Switching
Low Power Consumption
High-reliability Monolithic Receptor
Surface-mountable
Agency Approvals
UL - File No. E52744
CSA - Certification 093751
BSI/BABT Cert. No. 7980
FIMKO Approval
Applications
General Telecom Switching
- Telephone Line Interface
- On/off Hook
- Ring Relay
- Break Switch
- Ground Start
Battery-powered Switch Applications
Industrial Controls
- Microprocessor Control of Solenoids,
Lights, Motors, Heaters, etc.
Programmable Controllers
Instrumentation
See "Solid State Relays" (Appnote 56)
Description
The LH1525 relay are SPST normally open switches
(1 Form A) that can replace electromechanical relays
in many applications. The relay requires a minimal
amount of LED drive current to operate, making it
ideal for battery powered and power consumption
sensitive applications. The relay is constructed using
a GaAIAs LED for actuation control and an integrated
monolithic die for the switch output. The die, fabri-
cated in a high-voltage dielectrically isolated technol-
ogy, comprised of a photodiode array, switch-control
circuitry, and MOSFET switches. In addition, the relay
employs current-limiting circuitry, enabling it to pass
FCC 68.302 and other regulatory surge requirements
when overvoltage protection is provided. The relay
can be configured for ac/dc or dc-only operation.
Order Information
Part
Remarks
LH1525AAB
Tubes, SMD-6
LH1525AABTR
Tape and Reel, SMD-6
LH1525AT
Tubes, DIP-6
www.vishay.com
2
Document Number 83823
Rev. 1.3, 14-Jul-04
VISHAY
LH1525AT/ AAB/ AABTR
Vishay Semiconductors
Absolute Maximum Ratings, T
amb
= 25 C
Stresses in excess of the absolute Maximum Ratings can cause permanent damage to the device. Functional operation of the device is
not implied at these or any other conditions in excess of those given in the operational sections of this document. Exposure to absolute
Maximum Ratings for extended periods of time can adversely affect reliability.
SSR
Electrical Characteristics, T
amb
= 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.
Input
Output
Parameter
Test condition
Symbol
Value
Unit
LED input ratings: continuous
forward current
I
F
50
mA
LED input ratings: reverse
voltage
V
R
8.0
V
Output operation (each
channel): dc or peak ac load
voltage
I
L
50 A
V
L
400
V
Continuous DC load current,
bidirectional operation Pin 4 to 6
I
L
125
mA
Continuous DC load current,
unidirectional operation
Pins 4, 6 (+) to Pin 5 (-)
I
L
250
mA
Ambient operating temperature
range
T
amb
- 40 to + 85
C
Storage temperature range
T
stg
- 40 to + 150
C
Pin soldering temperature
t = 10 s max
T
sld
260
C
Input/output isolation test
voltage
t = 1.0 s
V
ISO
5300
V
RMS
Power dissipation
P
tot
550
mW
Parameter
Test condition
Symbol
Min
Typ.
Max
Unit
LED forward current,
switch turn-on
I
L
= 100 mA, t = 10 ms
I
Fon
0.33
0.5
mA
LED forward current,
switch turn-off
V
L
= 350 V, t = 100 ms
I
Foff
0.001
0.23
mA
LED forward voltage
I
F
= 1.5 mA
V
F
0.80
1.16
1.40
V
Parameter
Test condition
Symbol
Min
Typ.
Max
Unit
ON-resistance: ac/dc, each pole I
F
= 1.5 mA, I
L
= 50 mA
R
ON
17
26
36
ON-resistance:
dc Pins 4, 6 (+) to 5 (-)
I
F
= 1.5 mA, I
L
= 100 mA
R
ON
4.25
7.0
8.25
Off-resistance
I
F
= 0 mA, V
L
= 100 V
R
OFF
2000
G
Current limit
I
F
= 1.5 mA, t = 5.0 ms,
V
L
= 7.0 V
I
LMT
170
185
270
mA
Off-state leakage current
I
F
= 0 mA, V
L
= 100 V
I
O
0.67
200
nA
I
F
= 0 mA, V
L
= 400 V
I
O
0.096
1.0
A
VISHAY
LH1525AT/ AAB/ AABTR
Document Number 83823
Rev. 1.3, 14-Jul-04
Vishay Semiconductors
www.vishay.com
3
Transfer
Typical Characteristics
(T
amb
= 25
C unless otherwise specified)
Output capacitance
I
F
= 0 mA, V
L
= 1.0 V
C
O
22
pF
I
F
= 0 mA, V
L
= 50 V
C
O
6.42
pF
Switch offset
I
F
= 5.0 mA
V
OS
0.2
V
Parameter
Test condition
Symbol
Min
Typ.
Max
Unit
Capacitance (input-output)
V
ISO
= 1.0 V
C
IO
0.75
pF
Turn-on time
I
F
= 1.5 mA, I
L
= 50 mA
t
on
1.25
ms
I
F
= 5.0 mA, I
L
= 50 mA
t
on
0.22
1.0
ms
Turn-off time
I
F
= 1.5 mA, I
L
= 50 mA
t
off
0.6
ms
I
F
= 5.0 mA, I
L
= 50 mA
t
off
0.63
0.9
ms
Parameter
Test condition
Symbol
Min
Typ.
Max
Unit
Figure 1. Recommended Operating Conditions
Figure 2. LED Voltage vs. Temperature
0
20
40
60
80
100
120
40
20
0
20
40
60
80
Ambient Temperature ( C )
17331
I
Fon
= 3 to10 mA
Load
Current
(
m
A
)
I
Fon
= 1 mA
I
Fon
= 2 mA
I
Fon
= 0.5 mA
I
Fon
= 0.3 mA
ilh1525at_01
AMBIENT TEMPERATURE, TA (C)
LED
FORWAD
VOLTAGE
(V)
-40
-20
0
20
40
60
80
1.6
1.5
1.4
1.3
1.2
1.1
1.0
IF = 20 mA
IF = 1 mA
IF = 2 mA
IF = 5 mA
IF = 10 mA
IF = 50 mA
Figure 3. LED Forward Current vs. LED Forward Voltage
Figure 4. LED Reverse Current vs. LED Reverse Voltage
ilh1525at_02
120
100
80
60
40
20
0
0
0.5
1
1.5
2
T = 25 C
T = -40 C
T = 8 C
LED Forward Voltage (V)
LED
Forward
Current
(
mA)
ilh1525at_03
LED Reverse Voltage (V)
LED
Reverse
Current
(uA)
0
10
8
6
4
2
0
20
40
60
80
85 C
25 C
-40 C
www.vishay.com
4
Document Number 83823
Rev. 1.3, 14-Jul-04
VISHAY
LH1525AT/ AAB/ AABTR
Vishay Semiconductors
Figure 5. LED Current for Switch Turn-on vs. Temperature
Figure 6. ON-Resistance vs. Temperature
Figure 7. LED Dropout Voltage vs. Temperature
100
100
300
500
700
900
40
20
0
20
40
60
80
Ambient Temperature ( C )
17330
I
L
= 100 mA
T
u
rnon
(%),
Norm.
to
25
C
LED
Forward
Current
for
Switch
ilh1525at_05
40
30
20
10
0
-10
-20
-30
-40
-20
0
20
40
60
80
-40
Temperature (C)
Change
in
Ron
(%),
norm.
to
25
C
IL = 5mA
IL = 50 mA
ilh1525at_06
Temperature (C)
LED
Dropout
Voltage
(V)
1.21
1.17
1.13
1.09
1.05
1.01
-40
-20
0
20
40
60
80
IL = 100 mA
Figure 8. Load Current vs. Load Voltage
Figure 9. Current Limit vs. Temperature
Figure 10. Variation in ON-Resistance vs. LED Current
ilh1525at_07
300
250
200
150
100
50
0
Load
Current
(mA)
0
1
2
3
4
5
6
7
-40 C
25 C
85 C
IF = 1.5 m
Load Voltage (V)
ilh1525at_08
40
30
20
10
0
-10
-20
-30
-40
CHANGE
IN
CURRENT
LIMIT
(%)
NORMALIZED
TO
25
C
-40
-20
0
20
40
60
80
AMBIENT TEMPERATURE, TA (C)
IF = 5 mA, t = 5 ms
ilh1525at_09
9
8
7
6
5
4
3
2
1
0
0.0
1.0
2.0
3.0
4.0
5.0
LED FORWARD CURRENT (mA)
ac/dc
ON-RESISTANCE
VARIATION
(%)
NORMALIZED
TO
DATA
SHEET
R
ON
SPECIFICATION
@
I F
=5m
A
VISHAY
LH1525AT/ AAB/ AABTR
Document Number 83823
Rev. 1.3, 14-Jul-04
Vishay Semiconductors
www.vishay.com
5
Figure 11. Switch Capacitance vs. Applied Voltage
Figure 12. Output Isolation
Figure 13. Leakage Current vs. Applied Voltage at Elevated
Temperatures
ilh1525at_10
0
0
10
20
30
40
50
10
20
30
40
50
60
70
80
100
90
Applied Voltage (V)
Capacitance
(pF)
IF = 0mA
ilh1525at_11
100
1000
10000
100000
1000000
0
20
40
60
80
100
120
Frequency (Hz)
Isolation
(dB)
RL = 50 W
VP = 10 V
ilh1525at_12
0
0
50
100
150
200
250
300
100
200
300
400
Load Voltage (V)
Leakage
C
urrent
(nA)
85 C
70 C
50 C
25 C
Figure 14. Insertion Loss vs. Frequency
Figure 15. Switch Breakdown Voltage vs. Load Current
Figure 16. Switch Breakdown Voltage vs. Temperature
ilh1525at_13
100
1000
10000
100000
1000000
0
0.4
0.35
0.3
0.25
0.2
0.15
0.1
0.05
Frequency (Hz)
Insertion
L
oss
(
dB)
RL = 600
IF = 5 mA
ilh1525at_14
Switch Breakdown Voltage (V)
Load
Current
(uA)
0
0
100
200
300
400
500
10
20
30
40
50
60
85 C
25 C
-40 C
IF = 0 mA
IL = <50 uA
ilh1525at_15
AMBIENT TEMPERATURE, TA (C)
CHANGE
IN
BREAKDOWN
VOLTAGE
(%)
NORMALIZED
TO
25
C
8
6
4
2
0
-2
-4
-6
-8
-40
-20
0
20
40
60
80
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