Panasonic AQY210KS PhotoMOS Relay AQY210KS Number of pins 4 Pin 1 closure 350 V/DC/AC AQY210KS Data Sheet

GU PhotoMOS (AQY210KS)

4

ds_x615_en_aqy210ks: 181206J

When the load current exceeds 
specifications, the short circuit protection 
function kicks in and completely cuts off 
the load current, thus turning off the relay.
The short circuit protection inside the 
PhotoMOS relay instantaneously 
(typ. 50 

μs) and completely cuts of the 

load current.
This protects any circuits that follow the 
PhotoMOS relay from excess current.
There is almost no heating of the 
PhotoMOS relay, which prevents it from 
becoming damaged. To restore the 
function of the relay turn off the input 
current and then turn it back on.
In order to operate the short circuit 
protection function, ensure that the input 
current is at least I

F

 = 5 mA.

Output voltage and output current 
characteristics
V-I characteristics of PhotoMOS relay 
with short circuit protection circuit

Output voltage

Output current

Relay input
current

Relay output
current

5mA

120mA

0

0

Detection time
(approx. 50 

µs)

Normal relay operation

Occurrence of
short circuit current

Abnormal current

The short circuit current 
detection device latches 
when the relay is off.

The relay operates normally
when the input current is reset.

If the output section shorts even after 
the input current is reset, it will latch 
when the short circuit current is 
detected again and the relay turns off.