Cosmo Electronics Corp. 

Document No. 69M00001.6 - 1 - 

cosmo

KAQY212 Series

4PIN 60V N.O TYPE

SOLID STATE RELAY-MOSFET OUTPUT

Description 

The KAQY212 series 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 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. 

 Features 

1. Normally open, single pole single throw 

2. Control 60V AC or DC voltage 

3. Switch 400mA loads 

4. Controls low-level analog signals 

5. High sensitivity, low ON resistance 

6. Low-level off-state leakage current 

7. High isolation voltage 5KV (DIP / SMD) 

8. Pb free and RoHS compliant 

9. MSL class 1 

10. Agency Approvals：

• UL Approved (No. E108430): UL508 

• C-UL Approved (No. E108430) 

• FIMKO Approved: EN60065, EN60950 

Application 

• Telecommunications (PC, electronic notepad) 

• Modem 

• Telephone equipment 

• Security equipment 

• Sensors

• Measuring and testing equipment

• Factory automation equipment

• High speed inspection machines