QDD-400G-FR4 (740-085349) Juniper Compatible 400GBASE-FR4 QSFP-DD Transceiver
Juniper compatible QDD-400G-FR4 - Key Features
- Compatibility: Juniper
- 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
Juniper QDD-400G-FR4 Price
Juniper compatible QDD-400G-FR4 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 |
Juniper compatible QDD-400G-FR4 Datasheet
v2Complete technical specifications and product details
Juniper compatible QDD-400G-FR4 Description
QDD-400G-FR4 is Juniper's part number for a 400GBASE-FR4 QSFP-DD -- also tracked internally as hardware ID 740-085349. Qualified for QFX5130, QFX5220, PTX10000, MX10003, and ACX7100 platforms. EdgeOptic's compatible ships with Juniper-coded EEPROM for clean acceptance across all these chassis.
Two identifiers, one module. QDD-400G-FR4 is the orderable part number; 740-085349 is Juniper's internal hardware ID that shows up in Junos inventory output. Same product either way. Don't confuse it with the Arista QDD-400G-FR4 -- same name, different EEPROM coding, not interchangeable between vendors. Getting the vendor wrong means the module won't be recognized.
Four CWDM lanes at 1271/1291/1311/1331 nm, PAM4, 106.25 Gbps per lane. LC duplex over OS2 single-mode, 2 km reach. Budget: 4.0 dB (TX -3.3 to +3.5 dBm, RX -7.3 dBm). Under 11W. EML transmitters and PIN receivers handle the optical conversion. IEEE 802.3cu-2021, 100G Lambda MSA 400G-FR4, QSFP-DD MSA compliant. Full spec table on the 400GBASE-FR4 product page.
Qualified across Juniper's ACX, MX, PTX, and QFX product families -- any platform with 400G-capable line cards and QSFP-DD ports. Key models: QFX5130, QFX5220, PTX10000 series, MX10003, ACX7100. The MX204 won't work -- it's 100G-era hardware without QSFP-DD ports. 400G QSFP-DD support requires MX10003 or newer MX-series routers.
Junos logs a syslog entry for non-Juniper optics but won't block traffic by default -- the link still comes up and passes data normally. EdgeOptic's Juniper-coded EEPROM minimizes those syslog alerts. KP4 FEC (RS(544,514)) is mandatory for 400G FR4 and is typically enabled by default on Junos 400G interfaces. No manual FEC configuration should be necessary. The module uses 400GAUI-8 electrical signaling at CEI-56G-VSR-PAM4 levels toward the host ASIC.
Typical deployment: QFX5220 leaf switches linked to PTX10000 spine routers over intra-campus single-mode runs. FR4 also fits MX10003 edge deployments for 400G peering or upstream links where 2 km covers the distance between equipment rooms. FR4 uses LC duplex -- plugs straight into existing single-mode patch panels without the MPO infrastructure DR4 requires. Junos operational commands provide real-time per-lane optical power readings through DOM, which helps pinpoint individual CWDM lane issues during troubleshooting.
Volume pricing or Junos version compatibility questions -- contact our sales team.
Frequently Asked Questions
Is the Juniper QDD-400G-FR4 (740-085349) compatible with QFX5130 and QFX5220?
Yes. Juniper's transceiver planning guide confirms QDD-400G-FR4 (740-085349) for both QFX5130 and QFX5220 QSFP-DD ports.
Can the Juniper QDD-400G-FR4 be used in an MX204?
No. MX204 is 100G-era -- no QSFP-DD ports. For 400G, use MX10003 or newer MX-series routers, or QFX5130/QFX5220 switches.