Approval sheet

Page 5 of 7

ASC_WF10A_V02

MAY - 2016

CATALOGUE NUMBERS

The resistors have a catalogue number starting with .

WF10

A

1202

F

T

L

Size code

WF10: 1210

Type code

A : Power 3/4W

Resistance code

5%, E24: 2 significant digits

followed by no. of zeros

100



= 101_

10K

 = 103

1%, E24+E96: 3 significant

digits followed by no. of

zeros

100



=1000

37.4K



=3742

Tolerance

F:

 1%

J:

 5%

Packaging code

T: 7

” Reeled taping

Termination code

L = Sn base (lead

free)



Reeled tape packaging : 8mm width paper taping 5000pcs per 7

” reel.

TEST AND REQUIREMENTS(JIS C 5201-1 : 1998)

Basic specification :

The tests are carried out in accordance with IEC publication 68, "Recommended basic climatic and mechanical

robustness testing procedure for electronic components" and under standard atmospheric conditions according

to IEC 68-1, subclause 5.3, unless otherwise specified.

Temperature: 15ºC to 35ºC.

Relative humidity: 45% to 75%.

Air pressure: 86kPa to 106 kPa (860 mbar to 1060 mbar).

TEST

PROCEDURE / TEST METHOD

REQUIREMENT

Resistor

DC resistance

Clause 4.5

DC resistance values measured at the test voltages specified

below :

<10

@0.1V,

<100

@0.3V, <1K@1.0V,

<10K

@3V,

<100K

@10V, <1M@25V, <10M@30V

Within the specified tolerance

Temperature

Coefficient of

Resistance(T.C.R)

Clause 4.8

Natural resistance change per change in degree centigrade.





6

1

2

1

1

2

10







t

t

R

R

R

(ppm/

C) t

Refer to

“QUICK REFERENCE DATA”

Short time

overload (S.T.O.L)

Clause 4.13

Permanent resistance change after a 2 second application of

a voltage 2.5 times RCWV or the maximum overload voltage

specified in the above list, whichever is less.

R/R max. (1%+0.05)

Resistance to

soldering heat

(R.S.H)

Clause 4.18

Un-mounted chips completely immersed for 10±1second in a

SAC solder bath at 260℃±5ºC

ΔR/R max. ±(1%+0.05Ω)

no visible damage

Solderability

Clause 4.17

Un-mounted chips completely immersed for 2±0.5 second in

a SAC solder bath at 235℃±5℃

95% coverage min., good tinning and

no visible damage