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Green rectangular PCB adapter with gold edge connector and U.2 port for 2.5 inch SSD

Innocard

Innocard PCIe Gen4 to U.2 SFF-8639 2.5 inch SSD PWRDIS gender changer

SKU CH-6FDN-S27G9

Converts a PCIe 4.0 x4 link to a U.2 SFF-8639 2.5 inch SSD slot with PWRDIS control, clock buffer and hot-plug power protection

  • Changer TypePCIe Gen4
  • Enables U.2 SSD power disable control via SMBus I/O expander at address 0x41
  • Supports server BMC out-of-band management with PERST# and WAKE# translators
  • Extends PCIe Gen4 signal reach using built-in clock buffer and SMBus switch
  • Protects dual-port 12V hot-plug power with eFuse current limiting at 6.5A
  • Industrial temperature rating and Taiwan manufacture ensure reliable server deployment

PCIe Gen4 U.2 adapter for managed server storage

This adapter converts a PCIe 4.0 x4 slot to a U.2 SFF-8639 connector for 2.5 inch SSDs. It is designed for environments that require out-of-band drive management through BMC integration. The board includes an SMBus switch and I/O expander to enable PWRDIS control and remote reset functions. Built-in clock buffers and level translators support longer cable runs in rackmount layouts.

Interface limits of the PCIe 4.0 x4 to U.2 bridge

The link operates at PCIe 4.0 x4 electrical speeds through the SFF-8639 connector. Clock buffering at 100 MHz extends trace and cable reach without retimer components. WAKE# and CLKREQ# translators maintain open-drain signalling integrity over distance. PERST# routing allows host-driven reset of the remote U.2 device. These features define the practical reach and management envelope of the interface.

Dual-port 12 V power delivery

Each U.2 port receives 12 V power through integrated eFuse-protected hot-plug controllers. The programmable current limit is set at 6.5 A with configurable inrush slew rate. Thermal shutdown and fault alert circuits protect against overload conditions. Back-to-back FET topology supports dual-port operation. Power headroom suits enterprise SSDs; total draw beyond the limit will trigger protection.

Highlights

  • Enables U.2 SSD power disable control via SMBus I/O expander at address 0x41
  • Supports server BMC out-of-band management with PERST# and WAKE# translators
  • Extends PCIe Gen4 signal reach using built-in clock buffer and SMBus switch
  • Protects dual-port 12V hot-plug power with eFuse current limiting at 6.5A
  • Industrial temperature rating and Taiwan manufacture ensure reliable server deployment

Specifications

Changer TypePCIe Gen4

Questions about this item

Which PCIe generation does this adapter convert to U.2?

The adapter converts a PCIe 4.0 x4 connection to a U.2 (SFF-8639) interface for 2.5 inch SSDs.

What does the PCIe 4.0 x4 link provide for a U.2 SSD in this adapter?

It delivers a four-lane PCIe 4.0 connection to the U.2 drive, enabling the SSD to operate at its full interface speed.

What SMBus addresses are used for the clock buffer, switch and PWRDIS expander?

The clock buffer uses address 0x6C, the SMBus switch uses 0x71, and the I/O expander for PWRDIS control uses 0x41, all in 7-bit format.

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