• Silver-colored arista H-D400-4Q100-1M sfp+ transceiver modules with blue handles and metallic connectors for 400g active DAC
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Arista

Arista H-D400-4Q100-1M-Arista | 400G QSFP-DD to 4x 100G QSFP28 Active DAC, 1m

H-D400-4Q100-1M-Arista

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Description

This Arista active copper breakout cable connects one 400G QSFP-DD port to four 100G QSFP28 ports over a 1 metre run. It suits data centre leaf, spine and top-of-rack deployments where a 400G port needs to feed multiple 100G devices over short in-rack or adjacent-rack links, at a lower cost than AOC or optics.

The QSFP-DD end carries 8x 50G PAM-4 electrical lanes, and each of the four QSFP28 breakout ends carries 4x 25G NRZ lanes. A gearbox in the QSFP end converts 2x 50G PAM-4 to 4x 25G NRZ. Maximum power is 10W at the QSFP-DD end and 4W at each QSFP end, supplied by the host ports. The cable is pre-terminated 400GBASE-CR8 to 4x 100GBASE-CR4 twinax, and this SKU is the 1 metre length of the H-D400-4Q100-xM family.

It connects a 400G QSFP-DD port to four 100G QSFP28 ports. Platform support is listed in Arista's Transceiver and Cable Guide.

Enquire with XS Network Tech for new or used pricing and availability.

Features

- Connects a 400G QSFP-DD port (8x 50G PAM-4) to four 100G QSFP28 ports (4x 25G NRZ)
- Integrated gearbox handles the 50G PAM-4 to 25G NRZ lane conversion
- Pre-terminated active copper cable for short in-rack and adjacent-rack links
- Lower-cost alternative to AOC or optics for short reach
- Low power draw, with host ports supplying power to each end
- Suited to data centre leaf, spine and top-of-rack breakout deployments

Warranty

All products sold by XS Network Tech include a 12-month warranty on both new and used items. Our in-house technical team thoroughly tests used hardware prior to sale to ensure enterprise-grade reliability.

All technical data should be verified on the manufacturer data sheets.

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Technical Specifications

FAQs

Technical Specifications

- Type: 400GBASE-CR8 QSFP-DD to 4 x 100GBASE-CR4 QSFP28 active copper twinax breakout cable
- Length: 1 meter
- Host-end connector: 400G QSFP-DD
- Breakout-end connectors: 4 x 100G QSFP28
- QSFP-DD end electrical interface: 8 x 50G PAM-4 lanes
- QSFP end electrical interface: 4 x 25G NRZ lanes per QSFP
- Gearbox: in the QSFP end, converts 2x 50G PAM-4 to 4x 25G NRZ
- Maximum power, QSFP-DD end: 10 W
- Maximum power, each QSFP end: 4 W
- Dimensions, QSFP-DD Type 1 (H x W x D): 13.5 x 18.4 x 78.3 mm
- Dimensions, QSFP (H x W x D): 13.5 x 18.4 x 72.4 mm
- Operating case temperature: 0 to 70 C
- Storage temperature: -40 to 70 C
- Relative humidity: 5 to 95%
- Operating altitude: 0 to 10,000 ft

FAQs

Q: What does this cable connect?
A: It connects one 400G QSFP-DD port to four 100G QSFP28 ports, so a single high-speed port can serve four 100G devices.

Q: Why is there a gearbox in the cable?
A: The QSFP-DD side runs 50G PAM-4 lanes while each QSFP28 side runs 25G NRZ lanes. The gearbox in the QSFP end converts 2x 50G PAM-4 to 4x 25G NRZ so the two sides can interoperate.

Q: How much power does the cable draw?
A: Maximum power is 10W at the QSFP-DD end and 4W at each QSFP end. The host ports supply this power, so no external power is needed.

Q: What is the maximum reach for this type of cable?
A: Arista's active copper breakout cables in this family reach up to 5m. This SKU is the 1 metre length.

Q: How do I check which switch platforms support it?
A: Platform support is listed in Arista's Transceiver and Cable Guide. Contact us with your switch model if you want help confirming a match.

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