Innocard U.3 SFF-8639 PCIe Gen4 M.2 NVMe gender changer

U.3 SFF-8639 to M.2 NVMe adapter

This gender changer connects an M.2 NVMe solid-state drive to a U.3 SFF-8639 backplane or host connector. It is intended for integrators and technicians who need to install standard M.2 storage into enterprise-style U.3 bays. The adapter handles the physical and electrical conversion between the two form factors. It is not suited for users who require a direct M.2 to M.2 connection or a different drive interface.

PCIe Gen4 16GT/s with 3.3V and 1.8V supply switching

The board operates at PCIe Gen4 16GT/s and provides power conversion from a 12V input to 3.3V for the M.2 SSD through a synchronous buck converter rated at 5.5A maximum output current with a programmable limit of 6.5A. It also supports M.2 1.8V supply and translates PERST#, CLKREQ# and WAKE# signals between 3.3V and 1.8V levels. Builders who need higher current delivery or a different voltage rail will find the on-board protection limits fixed.

SFF-8639 connector with integrated protection

The adapter uses a built-in SFF-8639 connector with 30u” gold plating and pin-out defined by SFF-9402 Rev1.1. Protection includes overcurrent, undervoltage lockout, over/under voltage, thermal shutdown, output discharge control and 400W TVS ESD protection on the 3.3V input plus 500V HBM ESD rating. A 32 m ohm NexFET and Schottky barrier rectifier manage the 3.3V output path. Installers who need a bare passive interposer without active power management or signal translation should look elsewhere.