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Grey breakout cable with one wide QSFP-DD plug splitting to four QSFP56 ends, 1.5m PVC jacket

QSFPTEK

QSFPTEK 400GBASE-CU DAC Cable 30AWG 1.5m QSFP-DD to 4x 100G QSFP56 Breakout Passive Direct Attach Cable

SKU CH-B0WX-9XAY2

Passive copper breakout cable splits one 400G QSFP-DD port into four 100G QSFP56 links at 1.5m length with 0.1W power draw

  • 425 Gbps throughput over 1.5 m passive copper
  • Breaks one 400G QSFP-DD into four 100G QSFP56 links
  • Only 0.1 W power draw per cable end
  • 5 mm minimum bend radius for tight rack routing
  • Lead-free PVC jacket meets RoHS environmental standard

400G QSFP-DD Breakout Cable

This passive direct-attach cable splits a single 400G QSFP-DD port into four independent 100G QSFP56 links. It is built for data-centre racks that need high-density, short-range connectivity between switches, routers or servers without the cost and complexity of transceivers and fibre patch cords. The 1.5 metre length suits intra-cabinet or adjacent-rack runs where active optics would be over-specified.

Sustained Load Behaviour

Because the assembly is entirely passive copper it draws only 0.1 W and generates negligible heat, so throughput remains stable for as long as the link is up. No onboard electronics means there is no firmware to throttle, no laser bias to drift and no thermal shutdown risk even when all four 100G lanes run continuously at line rate. The 30 AWG conductors and 33.5 mm minimum bend radius keep signal integrity within the IEEE 802.3bj and 802.3cd limits for the full cable life.

Installation Notes

The QSFP-DD and QSFP56 ends are hot-pluggable to the QSFP-DD MSA, so modules can be inserted or removed without powering down the chassis. Route the cable with gradual curves no tighter than the specified bend radius; sharp kinks are the most common cause of intermittent errors on passive copper. Verify that each mating port is rated for the 425 Gbps aggregate data rate, as older 100G-only cages will not negotiate the breakout correctly.

How it compares

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Price $288.99
Pricier than about 92% of the 9,945 comparable items (median $14.99).

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Specifications

No published specifications for this item yet.

Questions about this item

Does the 0.1W power draw of this 400G QSFP-DD breakout cable mean it runs cool in a packed rack?

At 0.1W the passive copper assembly generates minimal heat, so it will not add measurable thermal load even when all four 100G lanes run continuously.

What switch ports are needed to plug in the four QSFP56 ends of this 1.5m DAC?

You need four 100G QSFP56 ports on the switch or router side; the single 400G QSFP-DD end goes into one 400G port.

Will this 30AWG cable work with older 40G QSFP+ ports I still have in the same rack?

No, the breakout uses 100G QSFP56 connectors that are not mechanically or electrically compatible with 40G QSFP+ ports.

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