Innocard
Innocard SFF-8639 PCIe 5.0 to M.2 3.3V Hot Plug Power Gender Changer
Converts M.2 NVMe to U.2 SFF-8639 with PCIe 5.0, 3.3V hot-plug power and protection circuits
- Changer TypePCIe Gen5
- Converts M.2 NVMe drives to U.2 SFF-8639 interface
- PCIe 5.0 support enables high-speed data transfer
- 12 V to 3.3 V buck converter delivers up to 5.5 A output
- Hot-plug controller with 6.5 A continuous current protects M.2 SSD
- Multiple protection circuits include OCP, UVLO and thermal shutdown
SFF-8639 PCIe 5.0 Gender Changer
This adapter converts an M.2 NVMe drive to a U.2 SFF-8639 interface using a pin-out defined by SFF-9402 Rev 1.1. It targets system integrators and technicians who need to install M.2 storage into enterprise backplanes or test equipment that only accept the 2.5-inch form factor. The card is designed and manufactured in Taiwan.
Built-in 3.3V Hot-Plug Power Controller
The decisive specification is the integrated PWM synchronous buck converter that steps 12V input down to a regulated 3.3V rail for the M.2 device. A NexFET power MOSFET with 32m ohm resistance and reverse-current protection enables hot-plug insertion while a programmable inrush slew-rate limits surge current to a maximum continuous 6.5A.
Protection Features Under Sustained Load
Continuous operation is guarded by output overcurrent protection, undervoltage lock-out monitoring and thermal shutdown circuitry. The 12V input rail carries a 5A fuse, a 5A Schottky barrier rectifier and a 400W bidirectional TVS diode to absorb transients. Output discharge control and over/under voltage protection maintain rail stability during prolonged heavy I/O.
Highlights
- Converts M.2 NVMe drives to U.2 SFF-8639 interface
- PCIe 5.0 support enables high-speed data transfer
- 12 V to 3.3 V buck converter delivers up to 5.5 A output
- Hot-plug controller with 6.5 A continuous current protects M.2 SSD
- Multiple protection circuits include OCP, UVLO and thermal shutdown
Specifications
| Changer Type | PCIe Gen5 |
|---|
Questions about this item
What does the PCIe 5.0 rating mean when the adapter is installed in a live system?
It allows the M.2 NVMe drive to communicate at Gen5 speeds through the SFF-8639 connector, limited by the host controller and drive capabilities.
How does the SFF-8639 interface and SFF-9402 Rev 1.1 pin-out affect what I can connect?
The built-in SFF-8639 connector follows the SFF-9402 Rev 1.1 pin-out, enabling a direct M.2 NVMe to U.2 conversion with proper signal mapping.
What power connections and physical clearance does this gender changer need to fit?
It requires a 12 V input rail protected by a 5 A fuse and 400 W bidirectional TVS, plus space for the onboard PWM buck converter, hot-swap controller, LEDs and 64 KB SMBUS EEPROM.
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