8

PR308S31ESU

■ Design Considerations

In phase control applications or where the SSR is being by a pulse signal, please ensure that the pulse width

is a minimum of 1ms.

For over voltage protection, a varistor may be used.

A varistor used for the above mentioned scenarios should be located as close to the main output triac as

possible.

The load current should be within the bounds of derating curve. (Refer to Fig.2)

Also, please use the optional heat sink when necessary.

In case the optional heat sink is used and the isolation voltage between the device and the optional heat sink

is needed, please locate the insulation sheet between the device and the heat sink.

When the optional heat sink is equipped, please set up the M3 screw-fastening torque at 0.3 to 0.5N•m.

In order to dissipate the heat generated from the inside of device effectively, please follow the below sugges-

tions.

(a) Make sure there are no warps or bumps on the heat sink, insulation sheet and device surface.

(b) Make sure there are no metal dusts or burrs attached onto the heat sink, insulation sheet and device sur-

face.

(c) Make sure silicone grease is evenly spread out on the heat sink, insulation sheet and device surface.

Silicone grease to be used is as follows;

1) There is no aged deterioration within the operating temperature ranges.

2) Base oil of grease is hardly separated and is hardly permeated in the device.

3) Even if base oil is separated and permeated in the device, it should not degrade the function of a device.

Recommended grease : G-746 (Shin-Etsu Chemical Co., Ltd.)

: G-747 (Shin-Etsu Chemical Co., Ltd.)

: SC102 (Dow Corning Toray Silicone Co., Ltd.)

In case the optional heat sink is screwed up, please solder after screwed.

● Design guide

Sheet No.: D4-A03601EN

Parameter

Symbol

Unit

Input

Output

Input signal current at ON state

Input signal current at OFF state

Load supply voltage

Load supply current

Frequency

Operating temperature

f

mA

mA

V

mA

Hz

˚C

−

−

−

−

−

−

Conditions

30

0.1

240

63

80

20

0

80

0.1

47

−20

MIN.

MAX.