Approval sheet
WW25P, WW20P, WW12P
1%, 5%
Thick Film High Power Low Ohm Chip Resistors
Size 2512 2W, 2010 1W, 1206 1/2W
*Contents in this sheet are subject to change without prior notice.
Page 1 of 7 ASC_WW25P-20P-12P_V09 Sep.2013 Approval sheet
FEATURE
1. High power rating and compact size
2. High reliability and stability
3. Reduced size of final equipment
4. RoHS compliant and lead free products.
APPLICATION
Power supply
PDA
Digital meter
Computer
Automotives
Battery charger
DC-DC power converter
DESCRIPTION
The resistors are constructed in a high grade ceramic body (aluminum oxide). Internal metal electrodes are
added at each end and connected by a resistive paste that is applied to the top surface of the substrate.
The composition of the paste is adjusted to give the approximate resistance required and the value is trimmed to
nominated value within tolerance which controlled by laser trimming of this resistive layer.
The resistive layer is covered with a protective coat. Finally, the two external end terminations are added.
For ease of soldering the outer layer of these end terminations is Tin (lead free) alloy.
Fig 1. Consctruction of Chip-R
Page 2 of 7 ASC_WW25P-20P-12P_V09 Sep.2013