LH1518AAB, LH1518AABTR, LH1518AT
Vishay Semiconductors
1 Form A Solid State Relay
FEATURES
SMD
S
S'
S
6
DC
5
S'
4
1
2
3
•
•
•
•
•
•
•
•
DIP
i179041-2
DESCRIPTION
Isolation test voltage 5300 VRMS
Current limit protection
High reliability monolithic detector
Low power consumption
Clean bounce free switching
High surge capability
Surface mountable
Compliant to RoHS Directive 2002/95/EC and in
accordance to WEEE 2002/96/EC
APPLICATIONS
Vishay solid state relays (SSRs) are miniature, optically
coupled relays with high-voltage MOSFET outputs. The
LH1518 relays are capable of switching AC or DC loads from
as little as nanovolts to hundreds of volts.
The relays can switch currents in the range of nanoamps to
hundreds of milliamps. The MOSFET switches are ideal for
small signal switching and are primarily suited for DC or
audio frequency applications.
The LH1518 relays feature a monolithic output die that
minimizes wire bonds and permits easy integration of
high-performance circuits such as current limiting in
normally-open switches. The output die integrates the
photodiode receptor array, turn-on and turn-off control
circuitry, and the MOSFET switches. The optically-coupled
input is controlled by a highly efficient GaAlAs infrared LED.
• General telecom switching
• Instrumentation
• Industrial controls
AGENCY APPROVALS
UL1577:
CSA:
BSI:
DIN EN:
FIMKO:
file no. E52744 system code H, double protection
certification no. 093751
certification no. 7979/7980
60747-5-2 (VDE 0884)/60747-5-5 (pending),
available with option 1
25419
ORDERING INFORMATION
L
H
1
5
1
PART NUMBER
8
#
ELECTR.
VARIATION
#
#
PACKAGE
CONFIG.
T
TAPE AND
REEL
PACKAGE
SMD
DIP
R
7.62 mm
> 0.1 mm
UL, CSA, BSI, FIMKO
SMD-6, tubes
LH1518AAB
SMD-6, tape and reel
LH1518AABTR
DIP-6, tubes
LH1518AT
ABSOLUTE MAXIMUM RATINGS (Tamb = 25 °C, unless otherwise specified)
PARAMETER
INPUT
LED continuous forward current
LED reverse voltage
OUTPUT
DC or peak AC load voltage
Continuous DC load current,
bidirektional operation
Continuous DC load current,
unidirektional operation
Peak load current (single shot)
Document Number: 83816
Rev. 1.5, 17-Mar-11
TEST CONDITION
SYMBOL
VALUE
UNIT
IR  10 μA
IF
VR
50
8
mA
V
VL
250
V
IL
155
mA
IL
300
mA
IP
(1)
t = 100 ms
For technical questions, contact: optocoupleranswers@vishay.com
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1
This datasheet is subject to change without notice.
THE PRODUCT DESCRIBED HEREIN AND THIS DATASHEET ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000
LH1518AAB, LH1518AABTR, LH1518AT
Vishay Semiconductors
1 Form A Solid State Relay
ABSOLUTE MAXIMUM RATINGS (Tamb = 25 °C, unless otherwise specified)
PARAMETER
SSR
Ambient temperature range
Storage temperature range
TEST CONDITION
Pin soldering temperature (2)
t = 10 s max.
SYMBOL
VALUE
UNIT
Tamb
Tstg
- 40 to + 85
- 40 to + 150
°C
°C
Tsld
260
°C
Input to output isolation voltage
VISO
5300
VRMS
Output power dissipation (continuous)
Pdiss
550
mW
Notes
• 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 the time can adversely affect reliability.
(1) Refer to current limit performance application note 58 for a discussion on relay operation during transient currents.
(2) Refer to reflow profile for soldering conditions for surface mounted devices (SMD). Refer to wave profile for soldering conditions for through
hole devices (DIP).
ELECTRICAL CHARACTERISTICS (Tamb = 25 °C, unless otherwise specified)
PARAMETER
TEST CONDITION
SYMBOL
MIN.
TYP.
MAX.
UNIT
0.8
2
mA
INPUT
LED forward current switch turn-on
IL = 100 mA, t = 10 ms
IFon
LED forward current switch turn-off
VL = ± 200 V
IFoff
0.2
0.7
IF = 10 mA
VF
1.15
1.26
1.45
V

LED forward voltage
mA
OUTPUT
On-resistance AC/DC: pin 4 (±) to 6 (±)
IF = 5 mA, IL = 50 mA
RON
10
15
20
Off-resistance DC: pin 4, 6 (+) to 5 (±)
IF = 5 mA, IL = 100 mA
RON
2.5
3.75
5
Off-resistance
IF = 0 mA, VL = ± 100 V
ROFF
0.5
5000
IF = 5 mA, t = 5 ms, VL = ± 6 V
ILMT
170
IF = 0 mA, VL = ± 100 V
IO
IF = 0 mA, VL = ± 250 V
IO
IF = 0 mA, VL = 1 V
CO
Current limit AC (1): pin 4 (±) to 6 (±)
Off-state leakage current
Output capacitance pin 4 to 6
Switch offset

G
200
280
0.02
200
nA
1
μA
55
mA
pF
IF = 0 mA, VL = 50 V
CO
10
pF
IF = 5 mA
VOS
0.15
μV
VISO = 1 V
CIO
0.8
pF
TRANSFER
Capacitance (input to output)
Notes
• 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.
(1) No DC mode current limit available.
SWITCHING CHARACTERISTICS (Tamb = 25 °C, unless otherwise specified)
PARAMETER
TEST CONDITION
SYMBOL
TYP.
MAX.
UNIT
Turn-on time
IF = 5 mA, IL = 50 mA
ton
1.4
3
ms
Turn-off time
IF = 5 mA, IL = 50 mA
toff
0.7
3
ms
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2
MIN.
For technical questions, contact: optocoupleranswers@vishay.com
Document Number: 83816
Rev. 1.5, 17-Mar-11
This datasheet is subject to change without notice.
THE PRODUCT DESCRIBED HEREIN AND THIS DATASHEET ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000
LH1518AAB, LH1518AABTR, LH1518AT
1 Form A Solid State Relay
Vishay Semiconductors
SAFETY AND INSULATION RATINGS
PARAMETER
TEST CONDITION
SYMBOL
VALUE
Climatic classification
IEC 68 part 1
40/85/21
Pollution degree
DIN VDE 0109
2
Tracking resistance
(comparative tracking index)
Insulation group llla
Highest allowable overvoltage
Max. working insulation voltage
CTI
175
Transient overvoltage
VIOTM
8000
Vpeak
Recurring peak voltage
VIORM
890
Vpeak
RIS
 1012


Insulation resistance at 25 °C
RIS

RIS
 1011

Vpd
1669
Vpeak
Case temperature
TSI
175
°C
Input current
ISI
300
mA
PSO
Insulation resistance at TS
VIO = 500 V
Insulation resistance at 100 °C
Partial discharge test voltage
Safety limiting values maximum values allowed
in the event of a failure
UNIT
Methode a, Vpd = VIORM x 1.875
Output power
109
700
mW
Minimum external air gap (clearance)
Measured from input terminals to output
terminals, shortest distance through air
7
mm
Minimum external tracking (creepage)
Measured from input terminals to output
terminals, shortest distance path along body
7
mm
TYPICAL CHARACTERISTICS (Tamb = 25 °C, unless otherwise specified)
60
1.6
Change in On-resistance (%)
Normalized to 25 °C
LED Forward Voltage (V)
IF = 50 mA
IF = 20 mA
IF = 10 mA
1.5
1.4
1.3
1.2
IF = 5 mA
1.1
IF = 2 mA
IF = 1 mA
1.0
- 40 - 20
0
20
40
60
30
20
10
0
- 10
- 20
- 30
20
40
60
80
10
LED Reverse Current (µA)
LED Forward Current (mA)
0
Fig. 3 - On-resistance vs. Temperature
120
100
17301
- 20
Ambient Temperature (°C)
17302
Fig. 1 - LED Voltage vs. Temperature
T = 85 °C
80
T = 25 °C
60
T = - 40 °C
40
20
0
0.0
IL = 50 mA
40
- 40
- 40
80
Temperature (°C)
17300
50
9
8
T = 85 ° C
7
T = 25 ° C
6
5
T = - 40 °C
4
3
2
1
0
0.5
1.0
1.5
2.0
LED Forward Voltage (V)
Fig. 2 - LED Forward Current vs. LED Forward Voltage
Document Number: 83816
Rev. 1.5, 17-Mar-11
0
17303
10
20
30
40
50
60
70
80
LED Reverse Voltage (V)
Fig. 4 - LED Reverse Current vs. LED Reverse Voltage
For technical questions, contact: optocoupleranswers@vishay.com
www.vishay.com
3
This datasheet is subject to change without notice.
THE PRODUCT DESCRIBED HEREIN AND THIS DATASHEET ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000
LH1518AAB, LH1518AABTR, LH1518AT
1 Form A Solid State Relay
8
40
6
Change in Current Limit (%)
Normalized to 25 °C
Change in Breakdown Voltage (%)
Normalized to 25 °C
Vishay Semiconductors
IF = 0
IL < 50 µA
4
2
0
-2
-4
-6
-8
- 10
- 12
- 40 - 20
0
20
40
60
20
10
0
- 10
- 20
- 30
- 40
- 40
80
Ambient Temperature (°C)
17304
0
20
40
60
80
Fig. 8 - Current Limit vs. Temperature
50
10
40
AC/DC Ron Variation (%)
Norm. at IF = 5 mA
Load Current (µA)
- 20
Ambient Temperature (°C)
17307
Fig. 5 - Switch Breakdown Voltage vs. Temperature
T = 85 °C
T = 25 °C
30
T = - 40 °C
20
IF = 0
IL < 50 µA
10
0
IL = 50 mA
8
6
4
2
0
-2
0
100
17305
200
300
400
500
Load Voltage (V)
0
4
8
12
16
20
LED Current (mA)
17308
Fig. 6 - Switch Breakdown Voltage vs. Load Current
Fig. 9 - Variation in On-resistance vs. LED Current
1.24
300
IL = 100 mA
LED Dropout Voltage (V)
IF = 5 mA
Load Current (mA)
IF = 5 mA
VL = 6 V
30
T = - 40 °C
200
T = 25 °C
T = 85 °C
100
1.20
1.16
1.12
1.08
0
0
1
2
3
4
Load Voltage (V)
17306
Fig. 7 - Load Current vs. Load Voltage
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1.04
- 40
5
17309
- 20
0
20
40
60
80
Temperature (°C)
Fig. 10 - LED Dropout Voltage vs. Temperature
For technical questions, contact: optocoupleranswers@vishay.com
Document Number: 83816
Rev. 1.5, 17-Mar-11
This datasheet is subject to change without notice.
THE PRODUCT DESCRIBED HEREIN AND THIS DATASHEET ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000
LH1518AAB, LH1518AABTR, LH1518AT
1 Form A Solid State Relay
1000
0.25
IF = 0
Leakage Current (nA)
Insertion Loss (dB)
RL = 600 Ω
0.20
0.15
0.10
0.05
0.00
102
103
104
T = 85 °C
100
T = 70 °C
T = 50 °C
10
0.1
0
100
150
200
250
Load Voltage (V)
Fig. 14 - Leakage Current vs. Applied Voltage
120
0.8
Switch Offset Voltage (µV)
RL = 50 Ω
VP = 10 V
100
Isolation (dB)
50
17313
Fig. 11 - Insertion Loss vs. Frequency
80
60
40
20
0
102
103
104
0.7
0.6
0.5
0.4
0.3
105
Frequency (Hz)
17311
0
5
10
15
20
25
LED Current (mA)
17314
Fig. 12 - Output Isolation
Fig. 15 - Switch Offset Voltage vs. LED Current
3.0
100
Switch Offset Voltage (µV)
IF = 0
80
Capacitance (pF)
T = 25 °C
1
105
Frequency (Hz)
17310
60
40
20
IF = 5 mA
2.5
2.0
1.5
1.0
0.5
0.0
0
0
17312
Vishay Semiconductors
20
40
60
80
Applied Voltage (V)
Fig. 13 - Switch Capacitance vs. Applied Voltage
Document Number: 83816
Rev. 1.5, 17-Mar-11
25
100
17315
35
45
55
65
75
85
Temperature (°C)
Fig. 16 - Switch Offset Voltage vs. Temperature
For technical questions, contact: optocoupleranswers@vishay.com
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5
This datasheet is subject to change without notice.
THE PRODUCT DESCRIBED HEREIN AND THIS DATASHEET ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000
LH1518AAB, LH1518AABTR, LH1518AT
1 Form A Solid State Relay
100
40
IL = 100 mA
80
Change in Turn-off Time (%)
Normalized to 25 °C
LED Current for Switch Turn-on (%)
Normalized to 25 °C
Vishay Semiconductors
60
40
20
0
- 20
- 40
- 60
- 40
- 20
0
20
40
60
Temperature (°C)
17316
10
0
- 10
- 20
- 30
- 20
0
20
40
60
80
Temperature (°C)
17319
Fig. 17 - LED Current for Switch Turn-on vs. Temperature
Fig. 20 - Turn-off Time vs. Temperature
1.0
Change in Turn-on Time (%)
Normalized to 25 °C
100
IL = 50 mA
0.9
Turn-off Time (ms)
20
- 40
- 40
80
IF = 5 mA
IL = 50 mA
30
T = - 40 °C
0.8
T = 25 °C
0.7
T = 85 °C
0.6
0.5
0.4
0.3
0.2
0
10
20
30
40
LED Forward Current (mA)
17317
17320
Fig. 18 - Turn-off Time vs. LED Current
60
40
20
0
- 20
- 40
- 40
50
IF = 5 mA
IL = 50 mA
80
- 20
0
20
40
60
80
Temperature (°C)
Fig. 21 - Turn-on Time vs. Temperature
4.0
IL = 50 mA
Turn-on Time (ms)
3.5
3.0
T = 85 °C
2.5
2.0
1.5
T = 25 °C
1.0
0.5
T = - 40 °C
0.0
0
10
20
30
40
50
LED Forward Current (mA)
17318
Fig. 19 - Turn-on Time vs. LED Current
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For technical questions, contact: optocoupleranswers@vishay.com
Document Number: 83816
Rev. 1.5, 17-Mar-11
This datasheet is subject to change without notice.
THE PRODUCT DESCRIBED HEREIN AND THIS DATASHEET ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000
LH1518AAB, LH1518AABTR, LH1518AT
1 Form A Solid State Relay
Vishay Semiconductors
PACKAGE DIMENSIONS in millimeters
DIP
Pin one ID
3
2
1
6.5
6.3
ISO method A
4
5
6
8.7
8.5
7.62 typ.
1 min.
3.81
3.30
4° typ.
18° typ.
3.81
2.79
0.051 min.
0.35
0.25
0.9
0.8
0.55
0.45
8.82
7.62
i178001
2.54 typ.
SMD
8.71
8.51
Pin one ID
0.76
6.50
6.30
R 0.25
2.54
1.78
8 min.
11.05
1.52
1.27 typ.
10.03
9.63
ISO method A
1.33
1.22
0.99 min.
7.62 typ.
3.81
3.30
0.25
0.10
3° to 7°
18°
4°
1.016
2.54
0.508
8 min.
0.31
0.20
i178002
PACKAGE MARKING
LH1518
V YWW H 68
Note
• Tape and reel suffix (TR) is not part of the package marking.
Document Number: 83816
Rev. 1.5, 17-Mar-11
For technical questions, contact: optocoupleranswers@vishay.com
www.vishay.com
7
This datasheet is subject to change without notice.
THE PRODUCT DESCRIBED HEREIN AND THIS DATASHEET ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000
Legal Disclaimer Notice
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Vishay
Disclaimer

ALL PRODUCT, PRODUCT SPECIFICATIONS AND DATA ARE SUBJECT TO CHANGE WITHOUT NOTICE TO IMPROVE
RELIABILITY, FUNCTION OR DESIGN OR OTHERWISE.
Vishay Intertechnology, Inc., its affiliates, agents, and employees, and all persons acting on its or their behalf (collectively,
“Vishay”), disclaim any and all liability for any errors, inaccuracies or incompleteness contained in any datasheet or in any other
disclosure relating to any product.
Vishay makes no warranty, representation or guarantee regarding the suitability of the products for any particular purpose or
the continuing production of any product. To the maximum extent permitted by applicable law, Vishay disclaims (i) any and all
liability arising out of the application or use of any product, (ii) any and all liability, including without limitation special,
consequential or incidental damages, and (iii) any and all implied warranties, including warranties of fitness for particular
purpose, non-infringement and merchantability.
Statements regarding the suitability of products for certain types of applications are based on Vishay’s knowledge of
typical requirements that are often placed on Vishay products in generic applications. Such statements are not binding
statements about the suitability of products for a particular application. It is the customer’s responsibility to validate that a
particular product with the properties described in the product specification is suitable for use in a particular application.
Parameters provided in datasheets and / or specifications may vary in different applications and performance may vary over
time. All operating parameters, including typical parameters, must be validated for each customer application by the customer’s
technical experts. Product specifications do not expand or otherwise modify Vishay’s terms and conditions of purchase,
including but not limited to the warranty expressed therein.
Except as expressly indicated in writing, Vishay products are not designed for use in medical, life-saving, or life-sustaining
applications or for any other application in which the failure of the Vishay product could result in personal injury or death.
Customers using or selling Vishay products not expressly indicated for use in such applications do so at their own risk.
Please contact authorized Vishay personnel to obtain written terms and conditions regarding products designed for
such applications.
No license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted by this document
or by any conduct of Vishay. Product names and markings noted herein may be trademarks of their respective owners.
Revision: 13-Jun-16
1
Document Number: 91000