Thick Film Trimmable Chip Resistors

( Lead-Free for RT series standard )

Document No.

TRT-XX2P003C

Issued Date

2011/04/20

page

9 / 10

TA-I TECHNOLOGY CO., LTD

14. ECN :

Engineering Change Notice: The customer will be informed with ECN if there is significant

modification on the characteristics and materials described in Approval Sheet.

15. Application Notes:

15.1 Trimming shall be performed by laser machine. ( For reference only )

a) Recommend condition:

Speed

Q-Rate

Power

80mm±20

10~12 KHz

3.0~4.5KW

b) Inadequate laser trim power can cause poor electrical characteristic

e.g., wide distributions and overload instability.

c) For different equipment types, please test & set up suitably trimming condition.

d) To avoid too long trimming length that will result poor power rating.

e) Resistance rising rate

15.2 After Trimming, In order to avoid humidity, dusty, corrosive gas result failure of resistor.

It is necessary that choosing suitable sealing glue to cover whole resistor surface.

Single cut

L cut

Double reverse cut

Double cut

Initial resistance increase of magnification

W’/w (w’=Total trimmed length)