VISHAY
LH1518AAB/ AABTR/ AT
Vishay Semiconductors
1 Form A Solid State Relay
DIP
SMD
Features
•
•
•
•
•
•
•
•
Isolation Test Voltage 5300 V
RMS
Current-limit Protection
Linear AC/DC Operation
High-reliability Monolithic Detector
Low Power Consumption
Clean, Bounce-free Switching
High Surge Capability
Surface Mountable
S
6
DC
5
S'
4
S
S'
i179001
1
2
3
Agency Approvals
UL - File No. E52744 System Code H or J
CSA - Certification 093751
BSI/BABT Cert. No. 7980
DIN EN 60747-5-5 (VDE 0884):2003-01 Available
with Option 1
• FIMKO Approval
•
•
•
•
Applications
General Telecom Switching
Instrumentation
Industrial Controls
The relays can switch currents in the range of nano-
amps to hundreds of milliamps. The MOSFET
switches are ideal for small signal switching and are
primarily suited for dc or audio frequency applica-
tions.
The LH1518 relays feature a monolithic output die
that minimizes wire bonds and permits easy integra-
tion of high-performance circuits such as current lim-
iting 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.
Description
Vishay Solid State Relays (SSRs) are miniature, opti-
cally- coupled relays with high-voltage MOSFET out-
puts. The LH1518 relays are capable of switching AC
or DC loads from as little as nanovolts to hundreds of
volts.
Order Information
Part
LH1518AAB
LH1518AABTR
LH1518AT
Remarks
SMD-6, Tubes
SMD-6, Tape and Reel
DIP-6, Tubes
Document Number 83816
Rev. 1.2, 08-Mar-04
www.vishay.com
1
LH1518AAB/ AABTR/ AT
Vishay Semiconductors
Absolute Maximum Ratings, T
amb
= 25 °C
VISHAY
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
Parameter
LED continuous forward current
LED reverse voltage
DC or peak AC load voltage
Continuous DC load current,
bidirectional operation
Continuous DC load current,
unidirectional operation
Peak load current (single shot)
Ambient temperature range
Storage temperature range
Pin soldering temperature
Input/output isolation voltage
Output power dissipation
(continuous)
1)
Test condition
I
R
≤
10
µA
Symbol
I
F
V
R
V
L
I
L
I
L
Value
50
8.0
250
155
300
1)
Unit
mA
V
V
mA
mA
t = 100 ms
I
P
T
amb
T
stg
- 40 to + 85
- 40 to + 150
260
5300
550
°C
°C
°C
V
RMS
mW
t = 10 s max
T
sld
V
ISO
P
diss
Refer to Current Limit Performance Application Note 58 for a discussion on relay operation during transient currents.
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
Parameter
LED forward current,
switch turn-on
LED forward current,
switch turn-off
LED forward voltage
Test condition
I
L
= 100 mA, t = 10 ms
V
L
= ± 200 V
I
F
= 10 mA
Symbol
I
Fon
I
Foff
V
F
0.2
1.15
Min
Typ.
0.8
0.7
1.26
1.45
Max
2.0
Unit
mA
mA
V
Output
Parameter
ON-resistance ac/dc:
Pin 4(±) to 6 (±)
ON-resistance dc:
Pin 4, 6 (+) to 5 (±)
Off-resistance
Current limit ac/dc :
Pin 4 (±) to 6 (±)
Off-state leakage current
Output capacitance Pin 4 to 6
Switch offset
Test condition
I
F
= 5.0 mA, I
L
= 50 mA
I
F
= 5.0 mA, I
L
= 100 mA
I
F
= 0 mA, V
L
= ± 100 V
I
F
= 5.0 mA, V
L
= ± 6.0 V,
t = 5.0 ms
I
F
= 0 mA, V
L
= ± 100 V
I
F
= 0 mA, V
L
= ± 250 V
I
F
= 0 mA, V
L
= 1.0 V
I
F
= 0 mA, V
L
= 50 V
I
F
= 5.0 mA
Symbol
R
ON
R
ON
R
OFF
I
LMT
I
O
I
O
C
O
C
O
V
OS
55
10
0.15
Min
10
2.5
0.5
170
Typ.
15
3.75
5000
200
0.02
280
200
1.0
Max
20
5.0
Unit
Ω
Ω
GΩ
mA
nA
µA
pF
pF
V
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2
Document Number 83816
Rev. 1.2, 08-Mar-04
VISHAY
Transfer
Parameter
Capacitance (input-output)
Turn-on time
Turn-off time
Test condition
V
ISO
= 1.0 V
I
F
= 5.0 mA, I
L
= 50 mA
I
F
= 5.0 mA, I
L
= 50 mA
LH1518AAB/ AABTR/ AT
Vishay Semiconductors
Symbol
C
IO
t
on
t
off
Min
Typ.
0.8
1.4
0.7
Max
3.0
3.0
Unit
pF
ms
ms
Typical Characteristics
(T
amb
= 25
°C
unless otherwise specified)
1.6
LED Forward Voltage ( V )
60
I
F
= 20 mA
I
F
= 10 mA
Change in On–Resistance (%)
Normalized to 25 C
I
F
= 50 mA
1.5
1.4
1.3
1.2
I
F
= 5 mA
1.1
1.0
–40
17300
50
40
30
20
10
0
–10
–20
–30
–40
–40
I
L
= 50 mA
I
F
= 2 mA
I
F
= 1 mA
–20
0
20
40
60
80
–20
0
20
40
60
80
Temperature ( C )
17302
Ambient Temperature ( C )
Fig. 1 LED Voltage vs. Temperature
Fig. 3 ON-Resistance vs. Temperature
120
100
T = 85 C
80
T = 25 C
60
T = –40 C
40
20
0
0.0
17301
10
LED Reverse Current ( A )
9
8
7
6
5
4
3
2
1
0
T = –40 C
T = 85 C
T = 25 C
LED Forward Current ( mA )
0.5
1.0
1.5
2.0
17303
0
10
20
30
40
50
60
70
80
LED Forward Voltage ( V )
LED Reverse Voltage ( V )
Fig. 2 LED Forward Current vs. LED Forward Voltage
Fig. 4 LED Reverse Current vs. LED Reverse Voltage
Document Number 83816
Rev. 1.2, 08-Mar-04
www.vishay.com
3
LH1518AAB/ AABTR/ AT
Vishay Semiconductors
VISHAY
8
Change in Breakdown Voltage ( % )
Normalized to 25 C
40
Change in Current Linit ( % )
Normalized to 25 C
6
4
2
0
–2
–4
–6
–8
–10
–12
–40
I
F
= 0
I
L
t50
A
30
20
10
0
–10
–20
–30
–40
–40
I
F
= 5 mA
V
L
= 6 V
–20
0
20
40
60
80
17307
–20
0
20
40
60
80
17304
Ambient Temperature ( C )
Ambient Temperature ( C )
Fig. 5 Switch Breakdown Voltage vs. Temperature
Fig. 8 Current Limit vs. Temperature
50
40
Load Current ( A )
ac/dc R–on Variation ( % )
norm. at I
F
= 5 mA
10
8
6
4
2
0
–2
0
100
200
300
400
500
17308
I
L
= 50 mA
T = 85 C
T = 25 C
T = –40 C
I
F
= 0
I
L
t50
A
30
20
10
0
0
4
8
12
16
20
17305
Load Voltage ( V )
LED Current ( mA )
Fig. 6 Switch Breakdown Voltage vs. Load Current
Fig. 9 Variation in ON-Resistance vs. LED Current
300
I
F
= 5 mA
LED Dropout Voltage ( V )
Load Current ( mA )
1.24
I
L
= 100 mA
T = –40 C
1.20
1.16
1.12
1.08
1.04
–40
17309
200
T = 25 C
T = 85 C
100
0
0
17306
1
2
3
4
5
–20
0
20
40
60
80
Load Voltage ( V )
Temperature ( C )
Fig. 7 Load Current vs. Load Voltage
Fig. 10 LED Dropout Voltage vs. Temperature
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4
Document Number 83816
Rev. 1.2, 08-Mar-04
VISHAY
LH1518AAB/ AABTR/ AT
Vishay Semiconductors
0.25
R
L
= 600
Leakage Current ( nA )
1000
I
F
= 0
T = 85 C
100
T = 70 C
T = 50 C
10
0.20
Insertion Loss ( dB )
0.15
0.10
0.05
0.00
100
1
T = 25 C
0.1
1000
10000
100000
17313
0
50
100
150
200
250
17310
Frequency ( Hz )
Load Voltage ( V )
Fig. 11 Insertion Loss vs. Frequency
Fig. 14 Leakage Current vs. Applied Voltage
120
100
Isolation ( dB )
Switch Offset Voltage ( V )
0.8
R
L
= 50
V
P
= 10 V
0.7
0.6
0.5
0.4
0.3
10000
100000
1000000
17314
80
60
40
20
0
1000
0
5
10
15
20
25
17311
Frequency ( Hz )
LED Current ( mA )
Fig. 12 Output Isolation
Fig. 15 Switch Offset Voltage vs. LED Current
100
Switch Offset Voltage ( V )
3.0
I
F
= 0
I
F
= 5 mA
2.5
2.0
1.5
1.0
0.5
0.0
0
20
40
60
80
100
17315
80
Capacitance ( pF )
60
40
20
0
25
35
45
55
65
75
85
17312
Applied Voltage ( V )
Temperature ( C )
Fig. 13 Switch Capacitance vs. Applied Voltage
Fig. 16 Switch Offset Voltage vs. Temperature
Document Number 83816
Rev. 1.2, 08-Mar-04
www.vishay.com
5
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