PR29MF11NIPF datasheet(9/15 Pages) SHARP

9 / 15 page

PR29MF1xNSZ Series/PR39MF1xNSZ Series/PR49MF11NSZ Series

■ Design Considerations

In order for the SSR to turn off, the triggering current (IF) must be 0.1mA or less.

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.

When the input current (IF) is below 0.1mA, the output Triac will be in the open circuit mode. However, if the

voltage across the Triac, VD, increases faster than rated dV/dt, the Triac may turn on. To avoid this situation,

please incorporate a snubber circuit. Due to the many different types of load that can be driven, we can

merely recommend some circuit values to start with : Cs=0.022µF and Rs=47Ω. The operation of the SSR

and snubber circuit should be tested and if unintentional switching occurs, please adjust the snubber circuit

component values accordingly.

When making the transition from On to Off state, a snubber circuit should be used ensure that sudden drops

in current are not accompanied by large instantaneous changes in voltage across the Triac.

This fast change in voltage is brought about by the phase difference between current and voltage.

Primarily, this is experienced in driving loads which are inductive such as motors and solenods.

Following the procedure outlined above should provide sufficient results.

Any snubber or Varistor used for the above mentioned scenarios should be located as close to the main

output triac as possible.

All pins shall be used by soldering on the board. (Socket and others shall not be used.)

● Degradation

In general, the emission of the IRED used in SSR will degrade over time.

In the case where long term operation and / or constant extreme temperature fluctuations will be applied to

the devices, please allow for a worst case scenario of 50% degradation over 5years.

Therefore in order to maintain proper operation, a design implementing these SSRs should provide at least

twice the minimum required triggering current from initial operation.

● Design guide

Sheet No.: D4-A00601EN

● Recommended Operating Conditions

Parameter

PR29MF1xNSZ

PR39MF1xNSZ

PR49MF11NSZ

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

IF(ON)

IF(OFF)

VOUT(rms)

IOUT(rms)

Topr

˚C

−

Locate snubber circuit between output terminals

(Cs

=0.022µF, Rs=47Ω)

−

Conditions

−

100

−20

0.1

120

240

300

IT(rms)

×80%(∗)

MIN.

MAX.

(∗) See Fig.2 about derating curve (IT(rms) vs. ambient temperature).

PR29MF1xNSZ

PR39MF1xNSZ

PR49MF11NSZ

Rank 1

Rank 2

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