UL, CSA, EN/IEC. 1-Form-A Fast Switching OptoMOS Relay, PLA. The PLA160 solid state relays have been designed to give extremely fast switching with a maximum time of 50 s. They are single pole and have normally open (1-Form-A) contacts. Potential Applications Instrumentation: Multiplexers, data acquisition, electronic switching, I/O subsystems Meters (watt-hour, water, gas) Medical equipment: Patient/equipment isolation Security systems Aerospace Industrial controls Reed relay replacement. Features Fastest switching OptoMOS relay, 50us 3750Vrms input/output isolation Low drive power requirements (TTL/CMOS compatible) No moving parts High reliability Arc-free with no snubbing circuits FCC compatible No EMI/RFI generation Small 6-pin DIP package Machine insertable, wave solderable Surface mount tape & reel version available Flammability classification rating of V-0