
LH1550AAB1, LH1550AAB1TR, LH1550AT1
www.vishay.com
Vishay Semiconductors
Rev. 1.9, 25-Jul-11
1
Document Number: 83841
For technical questions, contact:
optocoupleranswers@vishay.com
THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT
ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT
www.vishay.com/doc91000
1 Form A High-Voltage Solid-State Relay
DESCRIPTION
The LH1550 is robust, ideal for telecom and ground fault
applications. It is an SPST normally open switch (1 form A)
that replaces electromechanical relays in many applications.
It is similar to the LH1540, but has a characteristically higher
On resistance. 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 circuitry
which meets lightning surge testing as per ANSI/TIA-968-B
and other regulatory voltage surge requirements when
overvoltage protection is provided.
FEATURES
Current limit protection
Isolation test voltage 5300 V
RMS
Typical R
ON
28
Load voltage 350 V
Load current 120 mA
High surge capability
Clean bounce free switching
Low power consumption
SMD lead available on tape and reel
Compliant to RoHS Directive 2002/95/EC and in
accordance to WEEE 2002/96/EC
APPLICATIONS
General telecom switching
Instrumentation
Industrial controls
6
S
'
S
NC
1
5
2
4
3
S
S
'
i179041-2
DIP
S
MD
AGENCY APPROVALS
UL1577: file no. E52744 system code H, double protection
BSI:
7979/7980
DIN EN:
60747-5-2 (VDE 0884)/60747-5-5 (pending),
available with option 1
FIMKO:
25419
ORDERING INFORMATION
L
H
1
5
5
0
#
#
#
1
T
R
PART NUMBER
ELECTR.
VARIATION
PACKAGE
CONFIG.
NO DC
CONTACT
AT PIN 5
TAPE AND
REEL
PACKAGE
SMD-6
SMD-6, tape and reel
DIP-6, thru hole
UL, BSI, FIMKO
LH1550AAB1
LH1550AAB1TR
LH1550AT1
ABSOLUTE MAXIMUM RATINGS
(T
amb
= 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 -
bidirectional operation
Peak load current (single shot)
TEST CONDITION
SYMBOL
VALUE
UNIT
I
F
V
R
50
8
mA
V
I
R
10 μA
I
L
50 μA
V
L
350
V
I
L
100
mA
t = 100 ms
I
P
(1)
> 0.1 mm
7.62 mm
DIP
S
MD