Powerex LDR1__66, LD43__50 POW-R-BLOK Product Update Bulletin

LDR3__50 To Be Offered as Replacement
for LD43__50 POW-R-BLOK™

# : 2017-024 Rev.: 00

Date: 2017 / JUL / 21

Author: Ron Yurko

Subject of Change:

Introduction of new part type LDR3__50 to be offered as a direct replacement for Powerex LD43__50 dual SCR modules.
They are drop in replacements both mechanically and electrically with minor differences noted below.

Description of Change:

Resulting from the transfer of the manufacturing operations for the LD43 module from the former Powerex facility located
in Morocco to the Powerex manufacturing partner facility located in Poland to provide increased options in supply,
Powerex will be offering a new product LDR3__50 for consideration as a replacement for the LD43__50 module. It is an
equivalent replacement, but there will be differences in the mechanical and electrical characteristics. Please review the
product data sheet and make determination as to whether this product will be a suitable replacement for use in their
application. These differences include, but are not limited, to the following:

 Slightly less overall length dimension (149 mm) for the LDR3 as compared to the 150 mm overall length of the

LD43.

 Slightly wider terminals (26 mm on terminals 2 & 3) for the LDR3 as compared to the terminal widths for the

LD43 (25.4 mm on terminals 2 & 3)

 A slightly smaller screw depth under the terminals of 17 mm for the LDR3 as compared to the 17.5 mm depth for

the LD43

This module is being developed with a manufacturing partner with a country of origin of Russia that has a quality
management system that is in compliance with ISO 9001. This product is RoHS and REACH compliant and is
UL Recognized.

Reason for Change:

A new product is being introduced to assist with customer demand after unforeseen issues and difficulties with the
transition of the LD43__50 dual SCR modules from the former Powerex manufacturing facility located in Morocco which
was to be transferred to the former Westinghouse site and manufacturing partner facility located in Poland earlier this year.

Identification of Change:

This new product will be identified by a new part number LDR3__50 and will be labeled with PRX RU.
This module package has slightly different physical characteristics that differentiate it from the original LD43__50 modules.

Time Schedule for Change:

Delivery Begins: Third Quarter of 2017

Supporting Documentation:

Attachment – LDR3__50 Data Sheet

Quality Management system:

The Powerex partner manufacturing facility has a quality system that is in compliance with ISO 9001.
Parts will be qualified at the Powerex Youngwood, PA facility which has a quality system that is in compliance with ISO
9001 and AS9100.

Product Change Notification

Continued on following page

LD43 Part

Recommended Replacement

LD430850

LDR30850

LD431050

LDR31050

LD431250

LDR31250

LD431450

LDR31450

LD431650

LDR31650

LD431850

LDR31850

Product Change Notification

PCN 2017-024

Recommended Replacements for LD43__50 Dual SCR Modules