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Green circuit board with SFF-8639 connector and M.2 22x80mm slot

Innocard

Innocard SFF-8639 PCIe Gen4 to M.2 NVMe 22x80mm Adapter

SKU CH-W82B-ZJ1CG

Converts an SFF-8639 U.2 bay to an M.2 22x80mm NVMe drive with Gen 4 16GT/s bandwidth, 3.3V hot-plug protection up to 5.5A, and 1.8V/3.3V sideband switching

  • Changer TypePCIe Gen4
  • PCIe Gen4 16GT/s enables fast NVMe storage
  • 12V to 3.3V PWM buck converter supplies 5.5A max current
  • Hot-plug controller protects SSD with 6.5A continuous rating
  • 400W TVS diodes plus 500V HBM ESD shield data lines
  • Sideband 1.8V/3.3V switching supports SMBus hot-swap isolation

SFF-8639 PCIe Gen4 Adapter

This adapter connects an M.2 NVMe 22x80mm drive to a U.2 SFF-8639 bay using a PCIe Gen4 interface. It is built for users who need to install an M.2 SSD in a server or workstation that only provides U.2 slots. The on-board PWM converter steps 12V down to 3.3V with a 5.5A maximum output current for the drive.

Suits U.2 bays only

The card fits builders who have a free SFF-8639 backplane port and want to run an M.2 NVMe module there. It does not suit systems that lack a U.2 connector or that require a different physical drive form factor. Buyers needing a direct M.2 slot or a different adapter type should look elsewhere.

Hot-plug power protection included

A 3.3V hot-swap controller with 6.5A continuous current rating manages inrush current and provides over-current, under-voltage and thermal shutdown safeguards. The 400W TVS diode and 30V NexFET add transient protection. Sideband signals such as PERST#, CLKREQ# and WAKE# are level-shifted between 1.8V and 3.3V, and the SMBus is isolated for hot-swap operation.

Highlights

  • PCIe Gen4 16GT/s enables fast NVMe storage
  • 12V to 3.3V PWM buck converter supplies 5.5A max current
  • Hot-plug controller protects SSD with 6.5A continuous rating
  • 400W TVS diodes plus 500V HBM ESD shield data lines
  • Sideband 1.8V/3.3V switching supports SMBus hot-swap isolation

Specifications

Changer TypePCIe Gen4

Questions about this item

Does my motherboard need a U.2 (SFF-8639) port to use this adapter?

Yes, the adapter plugs into a U.2 port wired to PCIe Gen4 lanes and converts it for an M.2 2280 NVMe drive.

Will a legacy U.2 backplane limited to PCIe Gen3 still work with this adapter?

The adapter is built to the SFF-9402 Rev1.1 pin-out and supports PCIe Gen4 16GT/s; it will fall back to Gen3 speeds on an older backplane.

How can I confirm the onboard power protection is active after installation?

The PWM buck converter delivers up to 5.5 A at 3.3 V with OCP, UVLO and thermal shutdown; the SSD should power on and be detected without voltage faults.

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