https://www.acbel.com/files/product/download/Specification/IPC_PDF/R1CH2551B_R1CH2801A_R1CH2122A_Specification_01.pdf

⇅Product ID	Description
R1CH2551B	550W 180-264/190-400VAC Input, 12.4VDC Output with 12.4VSB with PMBus
R1CH2801A	800W 180-264/190-400VAC Input, 12.4VDC Output with 12.4VSB with PMBus

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