SPTSHP3CLCDF Silicom Compatible 400GBASE-FR4 QSFP-DD Transceiver
Silicom compatible SPTSHP3CLCDF - Key Features
- Compatibility: Silicom
- Media Type: Single-Mode Fiber (SMF)
- Connector: Double LC/UPC
- Fiber Count: Duplex
- Maximum Distance: 2 km
- Average Link Budget: 4 dB
- Tx Wavelength: CWDM 4 Ch
- Supported Data Rate: 425 Gbps
- DDM/DOM: Supported
- Forward Error Correction (FEC): Host FEC Supported
- Temperature Range: Standard 0°-70°C
Silicom SPTSHP3CLCDF Price
Silicom compatible SPTSHP3CLCDF Specifications
Form Factor | QSFP-DD |
Modulation | PAM4 (Pulse Amplitude Modulation 4-level) |
Media Type | Single-Mode Fiber (SMF) |
Connector | Double LC/UPC |
Fiber Count | Duplex |
Maximum Distance | 2 km |
Average Link Budget | 4 dB |
TX Wavelength | 4-channel CWDM (1271/1291/1311/1331 nm) |
RX Wavelength | 4-channel CWDM (1271/1291/1311/1331 nm) |
Supported Data Rate | 425 Gbps |
Supported Ethernet Applications | 400G Ethernet (425 Gbps) |
DDM/DOM | Supported |
Forward Error Correction (FEC) | Host FEC Supported |
CDR (Clock and Data Recovery) chip | Supported |
Transmitter Type | EML Laser |
Tx Wave Bandwidth | 73 nm (1264.50–1337.50 nm) |
Average Launch Power (Min) Each Lane | -3.3 dBm |
Average Launch Power (Max) Each Lane | 3.5 dBm |
Extinction Ratio (Min) | 3.5 dB |
Receiver Type | PIN photodiode |
RX Wave Bandwidth | 73 nm (1264.50–1337.50 nm) |
Average Receiver Sensitivity (Min) Each Lane | -7.3 dBm |
Average Receiver Sensitivity (Max) Each Lane | 3.5 dBm |
Receiver Overload | 4.5 dBm |
Temperature Range | Standard 0°-70°C |
Storage Temperature | -40° to 85°C |
Relative Humidity | 5 to 85% |
Power Consumption (Max) | 10 W |
Power | +3.3V single power supply |
Compliance | CE, RoHS, Class 1 FDA and IEC60825-1 Laser Safety Compliant, 100G Lambda MSA, 400GBASE-FR4, IEEE 802.3cu, QSFP-DD MSA |
Silicom compatible SPTSHP3CLCDF Datasheet
v2Complete technical specifications and product details
Silicom compatible SPTSHP3CLCDF Description
SPTSHP3CLCDF is a 400GBASE-FR4 QSFP-DD following Intel Silicon Photonics naming conventions. Silicom -- primarily a network adapter and SmartNIC vendor -- carries this transceiver as a matched accessory for their NIC product lines. EdgeOptic's compatible matches the original module's optical and electrical interface.
Don't confuse the two SPTSHP3 SKUs -- they are completely different modules. SPTSHP3CLCDF is 400G FR4 with an LC duplex connector, 2 km reach, single-mode fiber. SPTSHP3PMCDF is 400G DR4 with MPO-12, 500 m reach, also single-mode but parallel optics. "CL" in the SKU = LC connector (FR4), "PM" = MPO connector (DR4). Verify which one the fiber plant requires before ordering -- getting this wrong means the wrong connector type entirely.
Four CWDM wavelengths (1271/1291/1311/1331 nm), PAM4 at 106.25 Gbps per lane. LC duplex into OS2 single-mode, 2 km maximum reach, 4.0 dB optical budget. TX power -3.3 to +3.5 dBm, RX sensitivity -7.3 dBm. Under 11W. KP4 FEC (RS(544,514)) required on the host side. DOM supported via CMIS 4.0. IEEE 802.3cu-2021, QSFP-DD MSA compliant. Full specs on the 400GBASE-FR4 product page.
The "SPTSHP3" prefix follows Intel Silicon Photonics naming conventions. Silicom qualifies these SKUs as compatible accessories for their SmartNIC and network adapter product lines. Silicom's primary business is server network adapters -- the transceiver portfolio exists specifically to support customers who need matched optics for their NIC deployments without sourcing from a separate vendor.
Unlike most 400G modules that go into switch ports, the SPTSHP3CLCDF often lands in server-side QSFP-DD NIC ports, connecting the server directly to a top-of-rack switch over single-mode fiber. Server-side 400G adoption is accelerating -- GPU clusters and HPC environments drive demand as each compute node requires high-bandwidth, low-latency links to the network fabric. EdgeOptic's compatible works in both server NIC ports and switch ports. Specify the NIC or switch vendor when ordering so EdgeOptic codes the EEPROM correctly for the host hardware.
IEEE 802.3cu-2021 400GBASE-FR4, QSFP-DD MSA, CMIS 4.0 compliant. 0 to 70 C commercial operating temperature. DOM reports TX/RX optical power per lane, temperature, bias current, and supply voltage over the I2C management interface.
Volume pricing or platform coding questions -- contact our sales team.
Frequently Asked Questions
Does the Silicom SPTSHP3CLCDF use an LC or MPO connector?
LC duplex. SPTSHP3CLCDF is 400G FR4. The related SPTSHP3PMCDF is 400G DR4 with MPO. "CL" = LC, "PM" = MPO.
Is the SPTSHP3CLCDF an original Intel Silicon Photonics module?
No. The SKU follows Intel Silicon Photonics naming, but Silicom sells it as a compatible in their portfolio. EdgeOptic offers its own compatible for this part number.