DESCRIPTION
The LH1540 is robust, ideal for telecom and ground fault applications. It is an SPST normally open switch (form A) that replaces electromechanical relays in many applications. 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 VRMS
• Typical RON 20 , max. 25 
• 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