Littelfuse, Inc.
8755 West Higgins Road, Suite 500
Chicago, IL 60631 USA
(773) 628-1000
Jun 21
st
, 2021
RE: LFPCN 41393 – TVS STD SMF3.3 and SMF4.0 approval of wafer foundry location &
wafer size change for productivity improvement
To: Our Valued Customers
Littelfuse would like to notify you of changing wafer foundry location and corresponding wafer
size from 5-inch to 6-inch of TVS STD products listed below for productivity improvement. There
will be no change to the fit, form, function, quality or reliability of the products.
All affected products have been fully qualified in accordance with established performance and
reliability criteria. Please see the attached documentation for qualification results, change details
and affected part numbers. Full qualification data and samples will be available upon request.
Affected Part Numbers
SMF3.3
SMF3.3-A
SMF4.0
Form, fit, function changes: None
Part number changes: None
Effective date: Jan 1
st
, 2022 and rolling change
Replacement products: N/A
Last time buy: N/A
This notification is for your information and acknowledgement. If you have any other questions
or concerns, please contact your local sales team or product team below for further assistance.
We highly value your business and look forward to assisting you whenever possible.
Sincerely,
Jenny Chen
Assistant Product Marketing Manager
Commercial TVS Products
Tel: +86 510 85277701 Ext – 7965
Jchen7@littelfuse.com
800 E. Northwest Highway Des Plaines, IL 60016
Product/Process Change Notice (PCN)
PCN#: LFPCN #41393 Date: June 21
st
, 2021
Product Identification:
TVS STD Diode SMF3.3, SMF3.3-A, SMF4.0
Implementation Date for Change:
Jan 1
st
, 2022 or rolling change
Contact Information
Name: Jenny Chen
Title: Assistant Product Manager
Phone #: +86 510 85277710 Ext. 7965
Fax#: N/A
E-mail: jchen7@littelfuse.com
Category of Change:
Assembly Process
Data Sheet
Technology
Discontinuance/Obsolescence
Equipment
Manufacturing Site
Raw Material
Testing
Fabrication Process
Other: ______________________
Description of Change:
Littelfuse would like to notify you of changing wafer foundry location and
coresponding wafer size from 5-inch to 6-inch of TVS STD products listed
for productivity improvement.
There will be no change to the fit, form, function, quality or reliability of the
products.
The electrical performance and datasheet specifications of the affected
products will remain unchanged.
Important Dates:
Qualification Samples Available: Available upon the request Last Time Buy:
Final Qualification Data Available: Jun 17
th
2021, included on the following pages
Date of Final Product Shipment:
Method of Distinguishing Changed Product
Product Mark,
Date Code,
Other,
Demonstrated or Anticipated Impact on Form, Fit, Function or Reliability:
N/A
LF Qualification Plan/Results:
Littelfuse Qualification Report is included on the following pages.
Customer Acknowledgement of Receipt: Littelfuse requests you acknowledge receipt of this PCN. In your acknowledgement, you can
grant approval or request additional information. Littelfuse will assume the change is acceptable if no acknowledgement is received within 30 days
of this notice. Lack of any additional response within 90 days of PCN issuance further constitutes acceptance of the change.