• 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-D400-4Q100-2M-Arista | 400G QSFP-DD to 4x 100G QSFP28 Breakout DAC, 2m, Active

H-D400-4Q100-2M-Arista

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Description

This Arista active copper breakout cable connects one 400G QSFP-DD port to four 100G QSFP100/QSFP28 ports. It suits short-reach links inside the rack or to adjacent racks, such as splitting a 400G switch port across servers or other 100G switches.

The QSFP-DD end carries 8x 50G PAM-4 electrical lanes, while each of the four QSFP ends carries 4x 25G NRZ lanes. An integrated gearbox in the QSFP end converts 2x 50G PAM-4 to 4x 25G NRZ, so the cable interoperates with legacy 100G QSFP ports. This SKU is the 2 metre length of the Arista twinax active copper family, which is available in 1, 2, 3 and 5 metre lengths. Maximum power draw is 10 W at the QSFP-DD end and 4 W at each QSFP end.

The QSFP-DD end is designed for a port configured for 4x 100G breakout. The Arista OSFP-ended equivalent, H-O400-4Q100-xM, is a separate product family.

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

Features

- Connects a 400G port with 8x 50G PAM-4 lanes to four 100G QSFP100 ports with 4x 25G NRZ lanes
- Integrated gearbox for PAM-4 to NRZ conversion
- Active copper twinax construction for short-reach breakout
- Family reach of up to 5 m across the 1, 2, 3 and 5 m lengths
- Interoperates with legacy 100G QSFP ports

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

- PHY type: 400GBASE-CR8 to 4x 100GBASE-CR4
- Connector type: QSFP-DD to 4x QSFP (Active Copper Cable)
- Cable type: Twinax active copper
- Length: 2 m
- Electrical lanes (QSFP-DD end): 8x 50G PAM-4
- Electrical lanes (each QSFP end): 4x 25G NRZ
- Gearbox: converts 2x 50G PAM-4 to 4x 25G NRZ in the QSFP end
- Power (max), QSFP-DD end: 10 W
- Power (max), each QSFP end: 4 W
- QSFP-DD Type 1 dimensions (H x W x D): 13.5 x 18.4 x 78.3 mm
- QSFP-DD Type 2 dimensions (H x W x D): 13.5 x 18.4 x 93.3 mm
- QSFP dimensions (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 the gearbox in this cable do?
A: The gearbox in the QSFP end converts 2x 50G PAM-4 electrical lanes to 4x 25G NRZ lanes. This is what allows a 400G QSFP-DD port to connect to four 100G QSFP100 ports.

Q: What ports does it connect to?
A: One end plugs into a QSFP-DD port configured for 4x 100G breakout. The other end splits into four QSFP100/QSFP28 connectors for 100G ports on servers or switches.

Q: How much power does it draw?
A: The QSFP-DD end draws up to 10 W and each of the four QSFP ends draws up to 4 W.

Q: Is there an OSFP version of this cable?
A: Yes. Arista lists an OSFP-ended equivalent, H-O400-4Q100-xM, as a separate product family. This SKU is the QSFP-DD version.

Q: What lengths does this cable family come in?
A: The family is available in 1, 2, 3 and 5 metre lengths. This SKU is the 2 metre cable.

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