QSFP-DD to 4x QSFP56-400G-DAC-1.5M5FT 400G QSFP-DD 8 x 50G PAM4 to 4 x 100G QSFP56 2 x 50G PAM4 Passive Copper Breakout Cable, 1.5m (5ft)
This 1.5m (5ft) DAC assembly is made for installations that call for Generic QSFP-DD to 4x QSFP56-400G-DAC-1.5M5FT at 400G. The QSFP-DD to 4x QSFP56 connectors and cable arrive as one complete product, ready for a direct link between suitable ports. Field-handling guidance, exact specifications and pre-packing functional checks apply to the part number shown here.
OEM Part Number: QSFP-DD to 4x QSFP56-400G-DAC-1.5M5FTHT Part Number: QSFP-DD to 4x QSFP56-400G-DAC-1.5M5FT
Product Highlights
- HT-manufactured DAC assembly in 1.5m (5ft)
- 400G connectivity at 400Gbps
- Interface configuration: QSFP-DD to 4x QSFP56
- Fixed length and part number: 1.5m (5ft), QSFP-DD to 4x QSFP56-400G-DAC-1.5M5FT
- Conductor specification: 30AWG
- Maximum power consumption: 0.1W (QSFP-DD End)0.1W (QSFP56 Per End)
- Minimum bend radius: 41mm
- Operating temperature: 0 to 70°C (32 to 158°F)
Specifications
| HT Part Number | QSFP-DD to 4x QSFP56-400G-DAC-1.5M5FT |
|---|---|
| Manufacturer | HT |
| Form Factor | QSFP-DD to 4x QSFP56 |
| Max. Data Rate | 400Gbps |
| Minimum Bend Radius | 41mm |
| Wire AWG | 30AWG |
| Cable Length | 1.5m (5ft) |
| Jacket Material | PVC |
| Media | Copper |
| Modulation Format | QSFP-DD-8x 50G-PAM4QSFP56-2x 50G-PAM4 |
| Commercial Temperature Range | 0 to 70°C (32 to 158°F) |
| Power Supply | 3.3V |
| Protocols | SFF-8665, QSFP-DD MSA, IEEE802.3bj, IEEE802.3 cd |
| Max. Power Consumption | 0.1W (QSFP-DD End)0.1W (QSFP56 Per End) |
| Application | 400G Ethernet |
Signal and Lane Configuration
The listed modulation format is QSFP-DD-8x 50G-PAM4QSFP56-2x 50G-PAM4. Both host interfaces must be configured for the same aggregate rate and lane arrangement. A connector that fits mechanically does not by itself guarantee that the remote port supports this encoding or breakout mode.
Cable Construction and Routing
This assembly uses 30AWG conductors, PVC jacket, minimum bend radius 41mm. These mechanical characteristics affect how the cable should be dressed behind the equipment. Avoid sharp edges, excessive ties and repeated tight bends close to the connector boots.
Network and Protocol Considerations
The intended application is 400G Ethernet. Listed interface and protocol references include SFF-8665, QSFP-DD MSA, IEEE802.3bj, IEEE802.3 cd. Confirm that the host firmware and port configuration support the same operating mode.
Breakout Port Mapping
The QSFP-DD to 4x QSFP56 configuration divides the high-speed interface into multiple lower-speed connections. Verify the upstream lane assignment, downstream port speeds and breakout setting on the host before connecting the assembly. Each branch must attach to the correct remote interface.
Passive Copper Operation
A passive DAC has no separate optical conversion stage. Its low-power, low-latency operation is useful for short equipment links, but the assembly must remain within the length and signaling mode accepted by both hosts.
Length Selection and Installation Planning
The additional half metre beyond a one-metre assembly gives QSFP-DD to 4x QSFP56-400G-DAC-1.5M5FT useful routing flexibility when the ports are not directly aligned. It can accommodate a different rack unit or a short service loop, but excess cable should be dressed loosely rather than folded into a tight coil.
Position Within the Length Range
QSFP-DD to 4x QSFP56-400G-DAC-1.5M5FT occupies the middle of this family between QSFP-DD to 4x QSFP56-400G-DAC-1M3FT at 1m (3ft) and QSFP-DD to 4x QSFP56-400G-DAC-2M7FT at 2m (7ft). It adds 0.5m over the shorter option for extra routing clearance, while the next longer version adds another 0.5m. Measure the managed path and choose this version when its reach is sufficient without creating the slack associated with the longer assembly.
Field Installation and Maintenance
Inspect the route and both connectors before installation, then support the cable without pulling on either connector housing. During maintenance, release the latch properly rather than using the cable as a handle. Keep protection on unused ends, and if the assembly is removed for later use, coil it loosely and record its part number so the same length can be returned to service. For this assembly, the listed conductor specification is 30AWG; the minimum bend radius is 41mm; the stated power consumption is 0.1W (QSFP-DD End)0.1W (QSFP56 Per End); the jacket material is PVC.
Power and Thermal Planning
The rated power consumption is 0.1W (QSFP-DD End)0.1W (QSFP56 Per End). Include this load in the host-port power and thermal budget, especially in densely populated switches. Maintain front-panel clearance and do not bundle the cable so tightly that it obstructs airflow around the connectors.
Quality Assurance and Packaging
The cable and both connectors are inspected before a functional link test. Connector protection and bend-safe packing reduce handling damage during transport and storage. Customer or site labels can be added for field inventories, with different lengths separated to simplify issue and return of spare assemblies. Volume orders can include customer references on the labels and carton list.
Generic Compatibility and Factory Testing
A field-ready cable needs both correct identification and a stable operating link. Our pre-packing check therefore includes the connectors, host recognition and link behavior. For equipment with uncertain revision history, providing the host model and software release helps identify compatibility requirements before the assembly reaches the installation site. The check includes link stability and diagnostic indications, followed by a final inspection of both ends.
Frequently Asked Questions
Is this an original equipment manufacturer cable?
No. It is manufactured by HT under our own manufacturer identity.
Will any matching connector operate at the same speed?
Not necessarily. Both hosts must support the stated rate, identification, lane mapping and any required breakout configuration; mechanical compatibility alone is insufficient.
What details assist a compatibility review?
Provide the equipment manufacturer, model, port type, hardware revision and software release, together with the OEM reference, required length and quantity.
How should an unused assembly be stored?
Protect both connector ends, keep the cable in a loose bend-safe coil and retain its part-number label so the length and compatibility identity remain traceable.
Ordering Information
Request the cable by its exact part number and length, and state the equipment model if compatibility confirmation is needed. Site orders can list quantities by rack or installation team. Any requested label should retain the part number so a removed or spare cable can still be identified accurately. Quantity and any labeling instructions should be attached specifically to QSFP-DD to 4x QSFP56-400G-DAC-1.5M5FT.
Shipping and Lead Time
Standard configurations normally ship within one to three working days, while production quantities are confirmed with the order. International express, air cargo and sea freight can be selected according to destination and carton volume; customer courier accounts and nominated forwarders are also accepted.
