Approval sheet

Page 5 of 7

ASC_WW25A_V02

MAY - 2016

SOLDERING CONDITION

The robust construction of chip resistors allows them to be completely immersed in a solder bath of 260

°C for 10

seconds. Therefore, it is possible to mount Surface Mount Resistors on one side of a PCB and other discrete

components on the reverse (mixed PCBs).

Surface Mount Resistors are tested for solderability at 235

°C during 2 seconds. The test condition for no

leaching is 260

°C for 30 seconds. Typical examples of soldering processes that provide reliable joints without

any damage are given in Fig 3.

Fig 3. Infrared soldering profile for Chip Resistors WW25A

CATALOGUE NUMBERS

The resistors have a catalogue number starting with .

WW25

A

R005

J

T

L

Size code

WW25

: 2512

Type code

A : 3W

Sensing type

Resistance code

R is first digit followed by 3

significant digits.

0.010

Ω = R010

0.005

Ω = R005

Tolerance

J :

±5%

F :

±1%

Packaging code

T : 7” reeled in tape

Termination code

L = Sn base (lead

free)

Reeled tape packaging

: 12mm width plastic emboss taping 4,000pcs per reel.