AQ-G
4
CAUTIONS FOR USE
1. Regarding output noise surge pro-
tection
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.
2.
When used for the load less than rated
An SSR may malfunction if it is used be-
low the specified load. In such an event,
use a dummy resistor in parallel with the
load.
Load specification: Load current 20 mA
3. Noise and sur ge protection at the in-
put 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 con-
nected with reverse polarity
Reversing the polarity may cause perma-
nent damage to the device. Take special
care to avoid polarity reversal or use a
protection diode in the input circuit.
5. In the case of operating v olta ge con-
taining ripple
If the SSR control voltage contains ripple,
the peak of the ripple should not exceed
the maximum rated control voltage. 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. Select a cleaning solvent from
the following table. If ultrasonic cleaning
must be used, the se verity of f actors such
as frequency, output power and cleaning
solvent selected may cause loose wires
and other def ects. Mak e sure these condi-
tions are correct before use. For details,
please consult us.
7. Others
(1) If an SSR is used in close pro ximity to
another SSR or heat-generating device,
its ambient temperature may exceed the
allow able le vel. Carefully plan SSR lay out
and ventilation.
(2) Soldering to SSR terminals should be
completed within 5 seconds at 260
°
C.
(3) Terminal connections should be made
by referring to the associated wiring dia-
gram.
(4) For higher reliability, check device
quality under actual operating conditions.
8. Thermal Design
SSRs used in high-reliability equipment
require careful thermal design. In particu-
lar , junction temperature control has a sig-
nificant effect on device function and life
time. The rated load current for board-
mounting SSRs is defined as the maxi-
mum current possible at an ambient tem-
perature of 40
°
C (30
°
C) while allowing
natural cooling (self cooling). If the ambi-
ent temperature exceeds 40
°
C (30
°
C),
load current derating is necessary ac-
cording to the load current versus ambient
temperature curve. If adjacent devices act
as heat sources, the SSR should be locat-
ed more than 10 mm aw a y from those de-
vices.
Load
power
supply
Load
SSR
1
2Varistor
Load
power
supply
Load
SSR
1
2
R0 (dummy resistor)
SSR
3
4
Control
voltage
source
R
C
Cleaning solvent Compatibility
❍
: Yes
×
: N o
Chlorine-
base • Trichlene
• Chloroethlene
❍
Adueous • Indusco
• Hollis
• Lonco Terg
❍
Alcohol-
base • IPA
• Ethanol
❍
Others • Thinner
• Gasoline
×
Peak ripple voltage
Valley ripple voltage
0 V
10/1/2001 All Rights Reserved, © Copyright Matsushita Electric Works, Ltd.
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