Hi all,
I'm working on railway inverter maintenance and I'm trying to decode the lot codes on Mitsubishi Electric PM75CL1A120 IPM modules.
I have three units with the following codes printed on the label:
S14BH5G (two working units)
SO3BH4G (one failed unit)
I cannot find any official Mitsubishi Electric documentation explaining the lot code format for their power semiconductor modules.
Does anyone know how to decode these codes? Specifically:
What does each character/group represent?
Does it encode the manufacturing date?
What does the leading S (or SO) mean?
Any help or pointer to official documentation would be greatly appreciated.
Thanks
I'm working on railway inverter maintenance and I'm trying to decode the lot codes on Mitsubishi Electric PM75CL1A120 IPM modules.
I have three units with the following codes printed on the label:
S14BH5G (two working units)
SO3BH4G (one failed unit)
I cannot find any official Mitsubishi Electric documentation explaining the lot code format for their power semiconductor modules.
Does anyone know how to decode these codes? Specifically:
What does each character/group represent?
Does it encode the manufacturing date?
What does the leading S (or SO) mean?
Any help or pointer to official documentation would be greatly appreciated.
Thanks
