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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
S1
8
S1
S1'
S1' S2
7 6
S2'
5
S2
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S2'
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2
3
4
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Industrial Controls
Pb
Pb-free
鈥?Lead-free component
鈥?Component in accordance to RoHS 2002/95/EC
and WEEE 2002/96/EC
Description
The LH1556 dual 1 Form A relays are SPST normally
open switches that can replace electromechanical
relays in many applications. They are constructed
using a GaAIAs LED for actuation control and an inte-
grated 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,
the LH1556 SSRs employ current-limiting circuitry,
enabling them to pass FCC 68.302 and other regula-
tory surge requirements when overvoltage protection
is provided.
Agency Approvals
鈥?UL1577, File No. E52744 System Code H or J,
Double Protection
鈥?CSA - Certification 093751
鈥?BSI/BABT Cert. No. 7980
鈥?DIN EN 60747-5-2 (VDE0884)
DIN EN 60747-5-5 pending
鈥?FIMKO Approval
Applications
General Telecom Switching
- On/off Hook Control
- Ring Relay
- Dial Pulse
- Ground Start
- Ground Fault Protection
Instrumentation
Order Information
Part
LH1556AB
LH1556AAC
LH1556AACTR
Remarks
Tubes, DIP-8
Tubes, SMD-8
Tape and Reel, SMD-8
Document Number 83842
Rev. 1.3, 26-Oct-03
www.vishay.com
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