Technical information
Cautions for Use of SSR
10
ds_x61_en_ssr_technical_information: 011212D
SAFETY WARNINGS
Cautions for Use
Cautions for Use of SSR
• Do not use the product under conditions
that exceed the range of its
specifications. It may cause overheating,
smoke, or fire.
• Do not touch the recharging unit while
the power is on. There is a danger of
electrical shock. Be sure to turn off the
power when performing mounting,
maintenance, or repair operations on the
relay (including connecting parts such as
the terminal board and socket).
• Check the connection diagrams in the
catalog and be sure to connect the
terminals correctly. Erroneous
connections could lead to unexpected
operating errors, overheating, or fire.
1. Regarding output noise surge
protection
(1) AC Output Type
A high noise surge voltage applied to the
SSR load circuit can cause malfunction
or permanent damage to the device. If
such a high surge is anticipated, use a
varistor across the SSR output.
Note: AQ-F solid-state relay output terminals are
numbered (8) and (12).
(2) DC Output Type
When the SSR is loaded with an
inductive load, such as a solenoid
contactor, motor, or solenoid valve, use a
counter-EMF suppression diode across
the load.
2. When used for the load less than
rated
An SSR may malfunction if it is used
below the specified load. In such an
event, use a dummy resistor in parallel
with the load.
Load Specifications
3. Noise and surge protection at the
input side
A high noise surge voltage applied to the
SSR input circuit can cause malfunction
or permanent damage to the device. If
such a high surge is anticipated, use C or
R noise absorber in the input circuit.
4. When the input terminals are
connected with reverse polarity
5. In the case of operating voltage
containing ripple
If the SSR control voltage contains ripple,
the peak of the ripple should not exceed
the maximum rated control voltage, and
the bottom of the ripple should exceed
the minimum rated control voltage.
6. Cleaning solvents compatibility
Dip cleaning with an organic solvent is
recommended for removal of solder flux,
dust, etc. If ultrasonic cleaning must be
used, the severity of factors such as
frequency, out power and cleaning
solvent selected may cause loose wires
and other troubles.
Please make sure these conditions
before use.
7. Transportation and storage
1) Extreme vibration during transport will
warp the lead or damage the relay.
Handle the outer and inner boxes with
care.
2) Storage under extreme conditions will
cause soldering degradation, external
appearance defects, and deterioration of
the characteristics. The following storage
conditions are recommended:
• Temperature: 0 to 45C 32 to 113F
• Humidity: Less than 70% R.H.
• Atmosphere: No harmful gasses such
as sulfurous acid gas, minimal dust.
8. Others
(1) If an SSR is used in close proximity to
another SSR or heat-generating device,
its ambient temperature may exceed the
allowable level. Carefully plan SSR
layout and ventilation.
(2) Soldering to SSR terminals should be
completed within 5 seconds at 260C.
(3) Terminal connections should be made
by referring to the associated wiring
diagram.
(4) For higher reliability, check device
quality under actual operating conditions.
Type
Load
current
AQ-G All models 20 mA
AQ-1
AC output type
DC output type
50 mA
5 mA
AQ-J All models 50 mA
AQ-A All models 100 mA
Load
power
supply
Load
SSR
Varistor
Load
power
supply
Load
SSR
Load
power
supply
Load
SSR
R
0
(dummy resistor)
Type
If the polarity of the input control
voltage is reversed
AQ1,
AQ-J,
AQ-A,
AQ-J
Reversing the polarity will not cause
damage to the device, due to the
presence of a protection diode, but the
device will not operate.
AQ-H,
AQ-G
Reversing the polarity may cause
permanent damage to the device. Take
special care to avoid polarity reversal
or use a protection diode in the input
circuit.
SSR
Control
voltage
source
R
C
Peak ripple voltage
Valley ripple voltage
0 V