Huawei TN51PIU OptiX OSN 8800 T64/T32 Telecom System Card / Module

The Huawei TN51PIU is a Power Interface Unit board (material code 03020JRQ) used in the Huawei OptiX OSN 8800 T64 and T32 optical transport subracks. It accepts DC power input in the -40V to -72V range and is responsible for feeding, filtering and lightning-protecting the power supply before distributing it to the other boards fitted in the subrack, forming a key part of the chassis power distribution and surge-protection path. OSN8800 T64/T32 subracks are typically fitted with a pair of PIU boards for input redundancy, so that the loss of a single feed or PIU board does not bring down the transmission node. Other PIU variants such as TN11PIU and TN16PIU exist for different OSN chassis and support slightly different feature sets, so exact compatibility should be checked against the specific OSN8800 configuration in use. Because a PIU fault can affect power delivery to an entire subrack, tested replacement boards are a common field spare for operators maintaining legacy OSN8800 optical transport networks. Tech-Star (UK-based, shipped worldwide) stocks tested Huawei transmission spares; enquire for current stock and compatibility confirmation.