VISHAY
LH1521BAC/ BACTR/ BB
Document Number 83820
Rev. 1.2, 26-Apr-04
Vishay Semiconductors
www.vishay.com
1
i179046
8
7 6
5
1
2
3
4
S2'
S2
S1
S1'
S2'
S2
S1
S1'
DIP
SMD
Dual 1 Form B Solid State Relay
Features
Dual Channel (LH1501)
Isolation test Voltage 3750 V
RMS
Typical R
ON
20
Load Voltage 350 V
Load Current 150 mA
High Surge Capability
Linear, AC/DC Operation
Clean Bounce Free Switching
Low Power Consumption
SMD Lead Available on Tape and Reel
Agency Approvals
UL - File No. E52744
CSA - Certification 093751
BSI
Applications
General Telecom Switching
- On/off Hook Control
- Ring Delay
- Dial Pulse
- Ground Start
- Ground Fault Protection
Instrumentation
Industrial Controls
Description
The LH1521 dual 1 Form B relays are SPST normally
closed switches that can replace electromechanical
relays in many applications. The relays are con-
structed as a multi chip hybrid device. Actuation con-
trol is via an Infrared LED. The output switch is a
combination of a photodiode array with MOSFET
switches and control circuity.
Order Information
Part
Remarks
LH1521BAC
Tubes, SMD-8
LH1521BACTR
Tape and Reel, SMD-8
LH1521BB
Tubes, DIP-8
www.vishay.com
2
Document Number 83820
Rev. 1.2, 26-Apr-04
VISHAY
LH1521BAC/ BACTR/ BB
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
1
Breakdown occurs between the output pins external to the package.
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
Ambient temperature range
T
amb
- 40 to + 85
C
Storage temperature range
T
stg
- 40 to + 125
C
Pin soldering temperature
t = 10 s max
T
sld
260
C
Input/output isolation voltage
t = 1.0 s, I
ISO
= 10
A max
V
ISO
3750
V
RMS
Pole-to-pole isolation voltage
(S1 to S2)
1)
(dry air, dust free, at
sea level)
1600
V
LED continuous forward current
I
F
50
mA
LED reverse voltage
I
R
10 A
V
R
5.0
V
DC or peak AC load voltage
I
L
50 A
V
L
350
V
Continuous DC load current -
one pole operating
I
L
150
mA
Continuous DC load current -
two poles operating
I
L
110
mA
Peak load current (single shot)
t = 100 ms
I
P
400
mA
Output power dissipation
(continuous)
P
diss
600
mW
Parameter
Test condition
Symbol
Min
Typ.
Max
Unit
LED forward current,
switch turn-on
I
L
= 150 mA, t = 10 ms
I
Fon
0.2
0.9
mA
LED forward current,
switch turn-off
V
L
= 300 V
I
Foff
1.0
2.0
mA
LED forward voltage
I
F
= 10 mA
V
F
1.15
1.22
1.45
V
Parameter
Test condition
Symbol
Min
Typ.
Max
Unit
ON-resistance
I
F
= 0 mA, I
L
= 50 mA
R
ON
20
25
OFF-resistance
I
F
= 5.0 mA, V
L
= 100 V
R
OFF
0.1
1.4
G
Off-state leakage current
I
F
= 5.0 mA, V
L
= 350 V
0.08
1.0
A
Output capacitance
I
F
= 5.0 mA, V
L
= 50 V
50
pF
VISHAY
LH1521BAC/ BACTR/ BB
Document Number 83820
Rev. 1.2, 26-Apr-04
Vishay Semiconductors
www.vishay.com
5
Ozone Depleting Substances Policy Statement
It is the policy of Vishay Semiconductor GmbH to
1. Meet all present and future national and international statutory requirements.
2. Regularly and continuously improve the performance of our products, processes, distribution and
operatingsystems with respect to their impact on the health and safety of our employees and the public, as
well as their impact on the environment.
It is particular concern to control or eliminate releases of those substances into the atmosphere which are
known as ozone depleting substances (ODSs).
The Montreal Protocol (1987) and its London Amendments (1990) intend to severely restrict the use of ODSs
and forbid their use within the next ten years. Various national and international initiatives are pressing for an
earlier ban on these substances.
Vishay Semiconductor GmbH has been able to use its policy of continuous improvements to eliminate the
use of ODSs listed in the following documents.
1. Annex A, B and list of transitional substances of the Montreal Protocol and the London Amendments
respectively
2. Class I and II ozone depleting substances in the Clean Air Act Amendments of 1990 by the Environmental
Protection Agency (EPA) in the USA
3. Council Decision 88/540/EEC and 91/690/EEC Annex A, B and C (transitional substances) respectively.
Vishay Semiconductor GmbH can certify that our semiconductors are not manufactured with ozone depleting
substances and do not contain such substances.
We reserve the right to make changes to improve technical design
and may do so without further notice.
Parameters can vary in different applications. All operating parameters must be validated for each
customer application by the customer. Should the buyer use Vishay Semiconductors products for any
unintended or unauthorized application, the buyer shall indemnify Vishay Semiconductors against all
claims, costs, damages, and expenses, arising out of, directly or indirectly, any claim of personal
damage, injury or death associated with such unintended or unauthorized use.
Vishay Semiconductor GmbH, P.O.B. 3535, D-74025 Heilbronn, Germany
Telephone: 49 (0)7131 67 2831, Fax number: 49 (0)7131 67 2423
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