800G OSFP InfiniBand NDR Copper Cable Family
800G OSFP InfiniBand NDR copper cables: passive DAC, active ACC and AEC variants. 0.5–5 m, for in-rack links.
800G OSFP InfiniBand NDR Copper Cable Family
800G OSFP InfiniBand NDR copper cables: passive DAC, active ACC and AEC variants. 0.5–5 m, for in-rack links.
- Only 0.1 W per end on passive DAC — practically zero next to an optical module
- 0.5–3 m passive, 1–5 m active variants
- Finned (switch) and flat-top (adapter) housing options
- 8 x 100G-PAM4 modulation, 800Gb/s maximum rate
In InfiniBand NDR fabrics, most in-rack links are built with copper. Compared to an optical module it costs less, adds less latency and draws almost no power; its limit is distance.
The family holds four variants: two passive DAC types (finned and flat-top housings), ACC which refreshes the signal at low power, and AEC which retimes it for longer runs. The order of selection is clear — if the distance is within passive copper, use passive; if not, active; beyond that, optics.
Specifications
| Specification | Passive DAC — finned MCP4Y10-N00A | Passive DAC — flat top | Active DAC (ACC) | Active DAC (AEC) |
|---|---|---|---|---|
| Cable | ||||
| Cable type | Passive DAC | Passive DAC | Active DAC (ACC) | Active DAC (AEC) |
| Max. data rate | 800Gb/s | 800Gb/s | 800Gb/s | 800Gb/s |
| Form factor | OSFP finned ↔ finned | OSFP flat ↔ flat | OSFP finned ↔ finned | OSFP finned ↔ finned |
| Length range | 0.5–3 m | 0.5–3 m | 1–5 m | 1–5 m |
| Physical and electrical | ||||
| Wire gauge | 26–30 AWG | 26–30 AWG | 26–30 AWG | 28–32 AWG |
| Minimum bend radius | 54–69 mm | 34.5–45 mm | 48.5–59.5 mm | 36.5–53 mm |
| Modulation | 8 x 100G-PAM4 | 8 x 100G-PAM4 | 8 x 100G-PAM4 | 8 x 100G-PAM4 |
| Max. power consumption (per end) | 0.1 W | 0.1 W | 1.3 W | 12 W |
Specifications follow the manufacturer datasheet. The exact configuration is confirmed in your quote.
Connectivity Solutions
In-rack node to leaf links
Almost every link between a server adapter and a leaf switch in the same rack is built with these cables. At that distance passive DAC is both the cheapest option and the one drawing the least power at 0.1 W per end; optical module cost and heat disappear entirely.
Links beyond 3 metres
Once passive copper runs out, the active variants take over: ACC refreshes the signal at low power to reach 5 metres, while AEC performs stronger retiming but draws up to 12 W per end, which lands in the rack power budget. Beyond that distance, optical modules and fiber are preferred.
Two ends, two housing types
Switch ports expect finned housings and server adapters expect flat-top ones. A node-to-switch cable is therefore often a product with different housings at each end; when building an in-rack cable list, both ends of every link are specified.
Features
Bend radius is not a footnote
These cables are thick and relatively stiff; bending below the minimum radius degrades signal integrity and causes outages that are hard to diagnose. The flat-top variant's 34.5 mm radius is a clear advantage in tight cable channels.
Effect on power and cooling
Across a 64-link leaf layer, the difference between passive DAC and optical modules reaches hundreds of watts. In halls with a limited per-rack power budget, building every possible link in passive copper is a direct capacity gain.
Do not over-specify length
Excess cable creates unmanageable coils inside the rack, blocks airflow and raises the chance of violating the minimum bend radius. We produce the cable list per link from the rack layout plan.
Resources
- 800G OSFP NDR passive copper cable — product page and variant table Datasheet
- 800G OSFP cable and transceiver data sheet (PDF) Datasheet
Documents open on the manufacturer's or supplier's own site.
Request a quote for this product
Tell us the quantity and the cluster it will join; we send a compatible part list with lead times — usually the same business day.
- Authorised dealer supply, manufacturer warranty
- Compatibility check for switch, adapter and optics
- Lead time per line item
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