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Green PCB adapter with SFF-8674 and dual U.2 ports

Innocard

Innocard SFF-8674 1x2 PCIe 4.0 to U.2 dual port adapter with Hot Swap Power

SKU CH-41HX-DYW8H

PCIe 4.0 SFF-8674 adapter connects two U.2 NVMe drives with hot-swap power and eFuse protection

  • Changer TypePCIe Gen4
  • Converts PCIe 4.0 to dual U.2 ports via SFF-8674 1x2 connector
  • Built-in 12V hot-plug power with 6.5A eFuse protection per port
  • Supports NVMe 1.4 and PCIe 4.0 specifications
  • SMBus hot-swap buffer and PWRDIS implementation for safe drive insertion
  • Status LEDs show power ready, activity and signal states per port

Connection and conversion

This Innocard adapter converts a single SFF-8674 1x2 external Mini SAS HD connection into two U.2 SFF-8639 ports. It enables the attachment of dual U.2 NVMe SSDs to a host system via a PCIe 4.0 4X link. The design targets builders integrating high-density U.2 storage into servers or workstations where a native U.2 backplane is absent.

Sustained data handling

The adapter maintains a PCIe 4.0 4X electrical path to each U.2 port without an onboard bridge or switch, so bandwidth scales with the attached drives. Hot-plug capability is managed by an integrated SMBus 2-wire bus buffer and CLKREQ#, WAKE#, and PWRDIS signal buffers. Programmable current limits of 6.5A on the 12V rails and dedicated 3.3V load switches protect each port during insertion or removal under sustained transfer loads.

Power protection and indicators

Each U.2 port receives independent 12V hot-plug power circuitry with eFuse protection, thermal shutdown, and fault alert functions using back-to-back FET operation. Green LEDs signal power-ready status while red LEDs indicate drive activity and inverted PERST#, WAKE#, and CLKREQ# states. The 3.3V auxiliary supply is similarly guarded by load-switch protection for stable low-voltage operation.

Highlights

  • Converts PCIe 4.0 to dual U.2 ports via SFF-8674 1x2 connector
  • Built-in 12V hot-plug power with 6.5A eFuse protection per port
  • Supports NVMe 1.4 and PCIe 4.0 specifications
  • SMBus hot-swap buffer and PWRDIS implementation for safe drive insertion
  • Status LEDs show power ready, activity and signal states per port

Specifications

Changer TypePCIe Gen4

Questions about this item

How much heat or noise does the 12 V hot-plug power with eFuse protection add when the adapter runs all day?

The adapter has no fan; it relies on passive cooling. The eFuse protection limits current to 6.5 A and provides thermal shutdown, so power dissipation stays within the PCIe slot and U.2 drive limits.

What host connection must my system already provide for this SFF-8674 1x2 adapter to work?

Your motherboard or HBA needs a free SFF-8674 1x2 (external Mini SAS HD) port wired for PCIe 4.0 x4 to supply both U.2 ports.

Will my older PCIe 3.0 U.2 NVMe drives work in the dual U.2 ports?

Yes. The adapter complies with PCIe 4.0 and SFF-8639 3.0, so PCIe 3.0 U.2 NVMe drives will operate at their native speed through the SFF-8674 link.

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