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ds_x61_en_ssr_technical_information: 011212D

Cautions For Use of Phototriac Coupler/AQ-H

SAFETY WARNINGS

Cautions for Use

• 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. Applying stress that exceeds the

absolute maximum rating

If the voltage and current value for any of

the terminals exceeds the absolute

maximum rating, internal elements will

deteriorate because of the excessive

voltage and current. In extreme cases,

wiring may melt, or silicon P/N junctions

may be destroyed.

As a result, the design should ensure that

the absolute maximum ratings will never

be exceeded, even momentarily.

2. Derating

Derating is absolutely imperative for

reliable design and is an essential factor

in determining product life. Therefore, be

sure to amply derate the maximum rated

values when designing a system. Since it

is important to derate in accordance with

the type of relay, conditions for use, and

environment, please be sure to conduct

tests using actual equipment. Also, if

there is a possibility that, due to a quality

problem, this product might have a great

effect on human life or property, do take

product liability into consideration by

being sure to take even extra leeway

against the maximum rated value and

implement safety measures such as the

construction of redundant circuits.

3. The phototriac coupler is designed

solely to drive a triac. As a condition,

the triac must be powered beforehand.

4. The internal IC could be damaged if

a short forms between the I/O

terminals while the phototriac coupler

and AQ-H SSR are powered.

5. Output spike voltages

1) The figure below shows an ordinary

triac drive circuit. Please add a snubber

circuit or varistor, as noise/surge on the

load side could damage the unit or cause

malfunctions.

<AQ-H>

Note: Connection of an external resister, etc., to

terminal No. 5 (gate) is not necessary.

2) Clamp diode can limit spike voltages at

the load side. However, long wires may

cause spike voltages due to inductance.

It is recommended to keep wires as short

as possible to minimize inductance.

3) Output terminals may become

conductive when a sudden voltage rise is

applied, although the input power is not

applied. This may occur even if voltage

rise between terminals is less than the

repetitive peak OFF-state voltage.

Therefore, please perform sufficient tests

with actual conditions.

4) When controlling loads using zero-

cross voltage types in which the voltage

and current phases differ, since the triac

sometimes does not turn on regardless of

the input state, please conduct sufficient

tests using actual equipment.

6. Recommended input current value

F = 20 mA

7. Important Notes for Mounting

1) Temperature rise in the lead portion is

highly dependent on package size. If

multiple different packages are mounted

on the same board, please check your

board beforehand in an actual product,

ensuring that the temperature conditions

of the phototriac coupler fall within the

parameters listed.

2) If the mounting conditions exceed the

conditions recommended above, strength

of the resin used will decrease and

inconsistencies of the thermal expansion

coefficients in the component materials

will increase greatly. This can cause

package cracking and breakage of the

bonding wires. Please contact us for

consultation.

8. Cleaning

The phototriac coupler and AQ-H SSR

are forms an optical path by coupling a

light-emitting diode (LED) and

photodiode via transparent silicon resin.

For this reason, unlike other directory

element molded resin products (e.g.,

MOS transistors and bipolar transistors),

avoid ultrasonic cleaning if at all possible.

We recommend cleaning with an organic

solvent. If you cannot avoid using

ultrasonic cleaning, please ensure that

the following conditions are met, and

check beforehand for defects.

• Frequency: 27 to 29 kHz

• Ultrasonic output:

No greater than 0.25 W/cm

• Cleaning time:

No longer than 30 s

• Cleanser used: Asahiklin AK-225

• Other: Submerge in solvent in order to

prevent the PCB and elements from

being contacted directly by the

ultrasonic vibrations.

Note: Applies to unit area ultrasonic output for

ultrasonic baths.

9. 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 performance. The following storage

conditions are recommended:

• Temperature: 0 to 45C 32 to 113F

• Humidity: Less than 70% R.H.

• Atmosphere: No harmful gases such as

sulfurous acid gas, minimal dust.

3) Storage of SOP type

Phototriac couplers implemented in SO

packages (SOP 4-pin type) are sensitive

to moisture and come in sealed moisture-

proof packages. Observe the following

cautions on storage.

• After the moisture-proof package is

unsealed, use the devices as soon as

possible (use within 1 month 45C

113F/70% R.H.).

• If the devices are to be left in storage

after the moisture-proof package has

been unsealed, keep them in another

moisture-proof bag containing silica gel

and use within 3 months.

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