Juniper Networks QDD-400G-ZR Compatible 400G QSFP-DD Transceiver Module
This Juniper Networks QDD-400G-ZR compatible transceiver provides 400G connectivity in a hot-swappable QSFP-DD package. Its optical design operates at 1528.77~1566.52nm for up to Amplified: ≤120km Unamplified：≤40km, using Duplex LC/UPC. Complete parameters and related OEM references help field technicians install, maintain and identify the exact compatible module.
OEM Part Number: QDD-400G-ZRHT Part Number: QDD-ZR-400G
Product Highlights
- Compatible alternative to Juniper Networks QDD-400G-ZR
- 400G connectivity at 400Gbps
- Optical wavelength: 1528.77~1566.52nm
- Specified reach: Amplified: ≤120km Unamplified：≤40km
- Duplex LC/UPC / SMF interface
- Digital diagnostic monitoring: Supported
- Operating temperature: 0℃ to 70°C(32 to 158°F)
Specifications
| Juniper Compatible | QDD-400G-ZR |
|---|---|
| Manufacturer | HT |
| HT Part Number | QDD-ZR-400G |
| Form Factor | QSFP-DD |
| Max. Data Rate | 400Gbps |
| Wavelength | 1528.77~1566.52nm |
| Max. Cable Distance | Amplified: ≤120km Unamplified：≤40km |
| Connector | Duplex LC/UPC |
| Media | SMF |
| CD Robustness | 2400(ps/nm) |
| DDM/DOM | Supported |
| TX Power | -13~-9dBm |
| RX Power | Amplified: Full Rx OSNR tolerance: -12~0dBm Extended range: -15~1dBm Unamplified: -20~0dBm |
| Max. Power Consumption | 18.5W |
| Minimum Receiver Power | Amplified: -12dBm Unamplified: ≤-20dBm |
| OSNR Tolerance | 26dB/0.1nm |
| Commercial Temperature Range | 0℃ to 70°C(32 to 158°F) |
| Inbuilt FEC | CFEC |
| Modulation Format | DP-16QAM |
| Protocols | OIF 400ZR, OIF-CMIS-05.2, OIF-C-CMIS-01.2, QSFP-DD-Hardware-Rev6.3, IEEE Std 802.3-2018 |
| Application | Edge DCI |
Field Installation and Maintenance
Inspect the connector and patch lead before installation, then support the fiber without pulling on the module housing. Release the latch properly during maintenance and keep dust protection on unused interfaces. If a module is removed for later use, retain its part-number label and record its original port. For this model, the principal parameters are data rate 400Gbps, wavelength 1528.77~1566.52nm, rated reach Amplified: ≤120km Unamplified：≤40km.
Applications and Optical Link Design
This coherent interface is suited to data-center interconnect, metro transport and managed DWDM links where the host platform supports the stated modulation and FEC modes. Design the optical line around the actual launch power, receiver range, OSNR requirement and span loss; the stated reach is not a substitute for a link-budget calculation. Use matching coherent modules and the appropriate DWDM channel plan at both ends.
Before deployment, check the host port type, supported data rate and firmware requirements. The 400G interface configuration must match the remote equipment; sharing a QSFP-DD housing alone does not make two transceiver types interoperable.
Coherent deployment requires a line-system review, not merely a matching connector. Confirm the DWDM channel, launch-power range, receiver limits, OSNR and FEC mode at both ends. Span loss and amplifier operation must remain inside the supported envelope, and stated reach should be validated against the actual route.
Optical Acceptance, Diagnostics and Handling
For this model, the specified transmit-power range is -13~-9dBm. Digital diagnostics make later maintenance easier when baseline values are captured at installation. Save the initial readings with the port and OEM reference, then investigate meaningful changes rather than reacting to a single transient value. Diagnostic support depends on the host as well as the module, so unavailable fields should be confirmed with the platform documentation. Diagnostic monitoring is listed as Supported. Before every insertion, keep dust caps in place until the patch lead is ready, avoid touching the optical end face and use an appropriate inspection and cleaning procedure. Do not look into an active optical interface.
Quality Assurance and Packaging
Quality control covers the optical or electrical interface, host identification and operating link. The verified unit is then individually protected and cartoned. Customer references, rack groups and project packing lists can be added for volume orders.
Juniper Networks Compatibility and Factory Testing
The module is checked for host recognition as QDD-400G-ZR, link establishment and diagnostic reporting. Physical cage fit alone is not treated as evidence of compatibility. Equipment model, hardware revision and software release can be reviewed before dispatch where platform behavior is uncertain.
Frequently Asked Questions
Is this an original Juniper Networks transceiver?
No. It is an HT-manufactured compatible alternative for equipment that specifies QDD-400G-ZR, not an original Juniper Networks-branded module.
Which fiber and connector are required?
Use Duplex LC/UPC with SMF. The specified maximum reach is Amplified: ≤120km Unamplified：≤40km, subject to fiber quality and total link loss.
Can it be mixed with another wavelength or reach version?
Only when the two ends share the same optical standard, wavelength plan and supported data rate. Check the exact part numbers and link budget rather than relying only on the module form factor.
Ordering Information
Quote HT part number QDD-ZR-400G together with OEM reference QDD-400G-ZR and quantity. Add the host model and software release when pre-order verification is required. Neutral labels, customer packaging and project-specific compatibility review are available on request.
Shipping and Lead Time
Standard configurations normally ship within one to three working days, with production lead times confirmed for larger quantities. International courier, air freight and sea freight are available; customer courier accounts and nominated forwarders are accepted.
