DESCRIPTION
The LH1540 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 constructed using a GaAlAs LED for actuation control
and MOSFETs for the switch output. In addition, it employs
current-limiting circuitry to provide overvoltage protection.

FEATURES
• Current limit protection
• Isolation test voltage 5300 VRMS
• Typical RON 22 Ω
• Load voltage 350 V
• Load current 120 mA / 250 mA
• Clean bounce free switching
• Low power consumption
• Material categorization: for definitions of compliance
please see www.vishay.com/doc?99912

APPLICATIONS
• General telecom switching
• Security equipment
• Instrumentation
• Industrial controls

AGENCY APPROVALS
• UL1577, file no. E52744
• DIN EN 60747-5-5 (VDE0884-5), available with option 1