Precautions

Soldering method

1) Recommendable temperature profile

Circuit design

1) Once application and assembly environments have been checked,

the resistors may be used in conformance with the catalog and the

specifications.

2) Please consult the manufacturer in advance when the resistors is

used in devices such as: devices which deal with human life, I.e.

medical devices; devices which are highy public orientated; and

devices which demand a high standerd of liability.

3) Please use the resistors in conformance with the operating

temperature provided in both the catalog and the specifications.

4) Please keep voltage under the rated voltage which is applied to the

resistor.

5) Do not use the resistor in an environment where it might easily

exceed the respective provisions concerning shock and vibration

specified in the catalog and specifications.

6) Please do not use the resistor in the following environments.

qState that water, oil, and solvent hang in resistor

wState where poisonous gas (sulfur and chlorine, etc.) exists

eState that direct sunshine, radiation, and ultraviolet, etc. are irradiated

7) There is a thing that resistance changes according to the stuff of the

resin when the coating with the resin is given.

Please use resin coating after confirming the characteristic.

8) There is a thing that resistance changes according to flux and

cleaner.

Please use flux and cleaner after confirming the characteristic.

9) Please consult about a lead free products.

Storage

1) Keep storage place temperature

+5 to +35˚C, humidity 45 to 75%

RH.

2) Please keep parts out of poisonous gas such as sulfur or chlorine in

the air, and out of salty moisture. Or they may cause rust of

terminal, and poor solderability. and, please consider the above-

mentioned item after mounting your company.

(Caution) Cooling after soldering should be as slow as possible.

Ensure that the chip Resistor is preheated adequately.

Ensure that the temperature difference(

∆T) does not exceed 130˚C.

*Do not place the soldering iron on the chip. Soldering iron is 30W max.

reflow

2) Recommendable temperature profile

4) Soldering iron

wave

0

50

100

150

200

250

300

Temp(

°C)

60 sec.

60 sec.

10 sec. max.

(Time)

230 to 250

°C

More than 180

°C

40 sec. max.

preheat

0

50

100

150

200

250

300

Temp(

°C)

60 to 120 sec.

3 sec. max.

(Time)

230 to 250

°C

∆T

preheat

Temperature

soldering iron 300

±5°C*

Time

3 sec. max.

*

3) pb-free recommendable temperature profile

reflow

0

50

100

150

200

250

300

Temp(

°C)

90

±30 sec.

(Time)

Peak temperature

250

°C±5°C

5 to 10 sec. max.

More than 220

°C

20 sec. max.

1 to 3

°C/sec.

170 to 180

°C

preheat