The KAQV412 series is robust, ideal for telecom and

ground fault applications. It is a SPST normally close
switch (1 Form B) that replaces electromechanical relays
in many applications. It is constructed using a GaAlAs
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.
 Schematic
6
1
1 FORM B
NORMALLY CLOSE
5 4
2 3
5,6 4
1 2
 Features
1. Normally close, single pole single throw
2. Control 60V AC or DC voltage
3. Switch 200mA loads
4. Controls low-level analog signals
5. High sensitivity, low ON resistance
6. Low-level off-state leakage current
7. High isolation voltage
8. Pb free and RoHS compliant
9. Agency Approvals：
• UL 1577 / CUL C22.2 No.1 & NTC No. 5, File No. E169586
• UL 508 / CUL C22.2 No.14-M91, File No. E108430
• VDE EN60747-5-2, File No. 40020973
 Application
• Telecommunications (PC, electronic notepad)
• Modem
• Telephone equipment
• Security equipment
• Sensors
• Measuring and testing equipment
• Factory automation equipment
• High speed inspection machines
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