HP 842252-001 Power Button PCA is a replacement service part identified by HP’s part number. The listing describes it as a power button printed circuit assembly, intended for the power-button function in the equipment it fits.
The exact reference, 842252-001, helps distinguish this assembly from other power-button parts. The listing states that this part is new. It does not specify compatible computer models, dimensions, connectors or package contents, so those details are not included here.