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LH1550AAB1TR-LH1550AT1
1 Form A High-Voltage Solid State Relay
FEATURES Current Limit Protection l/O Isolation, 3000 Typical
20 Load Voltage 350 V Load Current 120 mA High Surge Capability Linear, AC/DC Operation Clean Bounce Free Switching Low Power Consumption High Reliability Monolithic Receptor SMD Lead Available on Tape and Reel Equivalent to CPC1035N UL 52744 Recognition BABT/BSI Certified
APPLICATIONS General Telecom Switching On/off Hook Control
– Ring Delay
– Dial Pulse
– Ground Start Ground Fault Protection Instrumentation Industrial Controls
DESCRIPTIONThe LH1550 is robust, ideal for telecom and ground
fault applications. It is a 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 con-
structed 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 FCC
68.302 and other regulatory voltage surge require-
ments when overvoltage protection is provided.
