E1.S (EDSFF) SSDs are increasingly adopted in modern platforms that prioritize density, serviceability, and PCIe Gen5 performance. The MB303E5P-B is especially well suited for scenarios that require compact dual-drive deployment within a single PCIe slot, such as:
| • | Supports 2 × E1.S NVMe SSDs (9.5mm) with screwless SSD installation |
| • | Fits single-slot, full-height 3/4-length PCIe card specification |
| • | PCIe 5.0 x4 interface per SSD, up to 128Gbps each |
| • | Requires PCIe bifurcation: ✓ PCIe x8 slot (x4/x4), or ✓ PCIe x16 slot (x4/x4/x4/x4) |
| • | Compatible with PCIe 5.0 x8 / x16 slots (with bifurcation support) |
| • | Integrated 50mm frameless fan for active cooling |
| • | Sealed airflow chamber design for maximized cooling efficiency |
| • | Dual removable SSD caddies for quick maintenance and replacements |
| • | EMI grounding – protects drives from electrical interference |
| • | Active Power Technology (APT) – LED and fan activate only when a drive is installed |
| • | Industry-leading 5-year limited warranty |
| • | Complimentary support from professionally trained US-based technical support agents |
| Model Number： | MB303EP-B |
| Color： | Black & silver |
| Support Drive Size： | 2 x E1.S SSD (support only 9.5mm height E1.S SSD) |
| Compatible Drive Type： | E1.S PCIe 5.0/4.0/3.0 NVMe SSD |
| Number of Drives： | 2 |
| Compatible PCIe Slot： | 1 x PCIe 5.0 x8 / x16 expansion slot (motherboard required PCIe x8 slots bifurcated into x4/x4 or PCIe x16 slots bifurcated into x4/x4/x4/x4) |
| Host Interface： | PCIe 5.0 x8 |
| Power Input： | Via PCIe and 6 Pin PCIe Power Input |
| Transfer Rate： | Up to 128Gbps (depending on hard drive speed) |
| Support SSD Capacity： | No limitation |
| Drive Cooling： | 1 x 50 x 50 x 15mm fan |
| Structure / Material： | Metal with partial ABS plastic |
| Dimension (W x H x D)： | 121 x 21.8 x 226.8 mm |
| Product Net Weight： | 315.7 g |
| Package Net Weight： | 417.2 g |
| Drive Activity LED Indication： | Green: LED (drive power: solid green, drive access: flashing green) Amber: LED (function is defined by host) Empty: LED off |
| Operating Voltage： | 12V, 3.3V |
| Power Consumption (SSD excluded)： | 3W |
| Package Contents： | Device, user manual, screws |
| Connector Insertion Rate： | 5,000 |
| Humidity： | 5%~65% RH |
| Operating Temperature： | 0°C to 70°C (32°F to 158°F) |
| Storage Temperature： | -35°C to 75°C (-31°F to 167°F) |
| Compliance： | CE, UKCA, RoHS, REACH |
| Warranty： | 5 years |
Compatible Drive Tray (Caddy):
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Q: Why does my new NVMe SSD show performance degradation or inconsistent behavior when connected through a PCIe adapter mobile rack?
A: High-speed PCIe devices, such as NVMe SSDs, require precise and stable signal integrity to operate correctly. If your NVMe SSD is connected via a PCIe adapter mobile rack that is inserted into a CPU-connected PCIe slot far from the CPU, the longer motherboard traces can increase the risk of signal degradation. This degradation can cause your NVMe SSD to experience performance drops, instability, or inconsistent behavior.
To ensure optimal performance, it is strongly recommended to install the PCIe adapter mobile rack into a PCIe slot closest to the CPU. Doing so minimizes the physical distance for signal transmission, significantly reducing the potential for signal degradation and ensuring stable, consistent performance and expected transfer speeds.
Q: The system does not detect the E1.S SSD I installed in the ICY DOCK enclosure. What should I do?
A: Since the motherboard and operating system may not support hot-swapping, if their compatibility has not been confirmed, we highly recommend powering off the device/system before inserting or removing an E1.S SSD.
If the system is still unable to detect the drive after installation, please follow the steps below to manually scan for new hardware:
Windows 11 / Windows 10 / Windows 8 – In the search box on the taskbar, type device manager, and click it from the menu. Once the device manager window pops up, right-click on the disk drive icon, and click scan for hardware changes.
Windows 7 – Right-click on the computer icon on the desktop, select properties, click device manager, right-click on the disk drive icon and then click scan for hardware changes.
Q: What is the function of the 2-pin (2P) header on the MB303E5P-B?
A: The 2-pin (2P) header on the MB303E5P-B is designed as an input interface for the E1.S SSD’s amber LED signal. It allows the host system to drive and control the amber LED indicator on the installed E1.S SSD.
Q: What does the amber LED on the E1.S SSD indicate?
A: The amber LED is typically used for drive status indication, such as Fail or Locate, based on industry-standard definitions. However, the actual behavior and meaning of the LED are determined by the host system implementation.
Q: How is the amber LED controlled on the MB303E5P-B?
A: The amber LED is not autonomously controlled by the adapter itself. Instead, the control signal must be provided externally via the 2P header from the host system or controller. The MB303E5P-B acts as a pass-through interface for this LED signal.
