Optical Communication Products · Shenzhen, China
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100% Traffic Tested400G OSFP112 Passive DAC Cable — FOT Fiber Optic
Click to configure length, jacket and vendor coding — your selection is included in the quote email.

400G OSFP112 Passive DAC Cable

SKU: FOT-DAC-400G-O112 · Category: AOC & DAC Cables

400G OSFP112 passive direct attach copper cable, up to 2 m. Factory-terminated, serialized and 100% traffic-tested before shipment.

400GAggregate Bandwidth
≤ 2 mReach
~0.1 WPower / End
Passive · 0 LatencyDesign
Length
0.5m1m1.5m2mCustom
Vendor Coding
Generic / MSANVIDIA / MellanoxCiscoAristaJuniperHuaweiHPE
Request a Quote Request Datasheet
Ships worldwide
OEM / ODM welcome
3-year warranty

Product Overview

The 400G OSFP112 Passive DAC Cable (FOT-DAC-400G-O112) is a factory-terminated passive direct attach copper assembly linking one 400G OSFP112 port to a OSFP112 port, delivering full 400G throughput over 30/28/26 AWG twinax copper at distances of up to 2 m. As a passive cable it consumes almost no power and adds zero latency — the most cost-effective way to connect equipment inside or between adjacent racks.

Each assembly ships terminated, serialized and 100% traffic-tested: eye-diagram and BER verification on every lane, connector housings inspected, and EEPROM programmed to your requested vendor coding so the cable is recognized natively by your switches and NICs. This model is also offered NVIDIA MCP1660-compatible for GPU-cluster deployments.

OEM branding, custom lengths and mixed-coding ends (different vendor coding on each end) are all supported with short lead times.

Connectivity Diagram

OSFP112400G portOSFP112400G portTwinax copper · up to 2 m

Technical Specifications

Electrical / Optical
Aggregate Data Rate400G (4 × 106G PAM4)
ConfigurationOSFP112 → OSFP112
Reachup to 2 m
Media30/28/26 AWG twinax copper
Power Consumption≈0.1 W
General
Form Factor AOSFP112
Form Factor BOSFP112
StandardsOSFP MSA, CMIS 5.0
Hot-PluggableYes
NVIDIA CompatibleMCP1660
Vendor CodingProgrammable — all major platforms
Warranty3 years
Environmental & Mechanical
Operating Temperature0 °C to +70 °C
Storage Temperature−40 °C to +75 °C
Supply Voltage3.3 V
JacketPVC / OFNR
Bend Radius≥ 10× cable Ø (installed)
ComplianceRoHS, REACH, CE

Ordering Information

Part NumberLengthWire GaugeAvailability
FOT-DAC-400G-O112-0.5M0.5m30 AWG twinaxIn stock
FOT-DAC-400G-O112-1M1m30 AWG twinaxIn stock
FOT-DAC-400G-O112-1.5M1.5m28 AWG twinaxIn stock
FOT-DAC-400G-O112-2M2m28 AWG twinaxIn stock
FOT-DAC-400G-O112-CUSTOMCustomPer specificationQuoted per order

Need a length that isn't listed? Custom lengths ship in 5–7 days — just note it in your RFQ.

Platform Compatibility

Every cable is EEPROM-programmed at the factory to the vendor coding you specify, so it is recognized natively — no "unsupported transceiver" warnings, no console workarounds. Mixed coding (a different vendor on each end) is available for inter-vendor links.

Generic / MSANVIDIA / MellanoxCiscoAristaJuniperHuaweiHPE

Quality & What's in the Box

100% Traffic Tested

Every lane BER-verified end-to-end on live traffic before packing; eye diagrams sampled per batch.

Serialized & Traceable

Unit serial number links to test record, coding profile and production batch for full traceability.

Test Report Included

Per-order test report available on request; sample reports provided for tender documentation.

Packaging

Individually bagged with pull-tab protector caps, coiled to safe bend radius, export cartons.

Typical Applications

Data Center Fabrics

Spine-leaf and top-of-rack links inside and between adjacent racks.

AI / GPU Clusters

High-radix accelerator fabrics where cost per port and power per bit decide the BOM.

HPC & Storage

InfiniBand-class latency for compute and NVMe-oF storage backends.

Enterprise Core

Cost-effective uplinks between aggregation and core switching layers.

Frequently Asked Questions

What is the difference between passive and active DAC?

A passive DAC is a plain twinax copper link with no electronics — near-zero power, zero added latency, but limited to short reach. An active DAC adds signal-conditioning chips in the connector ends to roughly double the reach at slightly higher cost and power. For in-rack links a passive cable is almost always the right choice.

Will it work with my switch brand?

Yes — tell us your platform when ordering and we program the EEPROM with the matching vendor coding (NVIDIA/Mellanox, Cisco, Arista, Juniper, Huawei, HPE or open MSA). Mixed coding on the two ends is available for inter-vendor links.

What are your MOQ and lead time?

Standard configurations ship in 3–7 days with flexible MOQ. Custom OEM/ODM runs are quoted per project — send us your specs for a fast quotation.

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Request a quote for this part

Tell us the platform and the quantity. An engineer checks the part against your switch and software version before quoting — if it will not work, we say so.

Goes to our engineers and the quotation desk together. Replies come from sales@topnetsystem.com, usually within one working day.