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Cisco

Cisco QSFP-4SFP25G-CU3M | 100G→4x25G DAC | QSFP28→4xSFP28 | 100GBASE-CR4/25GBASE-CR | passive twinax, λ n/a | 3m | QSFP28/SFP28

SKU:QSFP-4SFP25G-CU3M

2 in stock

Regular price $537.63 AUD
Regular price
$537.63 AUD
$537.63 AUD
Regular price
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Description

Passive copper breakout DAC for connecting a 100G QSFP28 port to four 25G SFP28 ports over a 3 m run, delivering low-latency and cost-effective fan-out for data center racks. MSA-compliant form factors ensure broad interoperability across QSFP28/SFP28 switch and NIC ports.

Features

- Affordable short-to-mid reach 100G→4x25G fan-out
- Passive copper for minimal latency and power
- Standards-based QSFP28/SFP28 for broad interoperability
- Twinax shielding for reliable signal integrity
- Hot-swappable convenience with no extra optics needed
- Optimized for ToR and server aggregation links

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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FAQs

Technical Specifications

FAQs

Q: Is this cable passive or active?
A: It is a passive twinax DAC. Ensure the host ports support passive DAC operation.

Q: Will it work with my switches and servers?
A: It is MSA-compliant for QSFP28/SFP28. Most platforms support it, but confirm that your device supports 100G to 4x25G breakout on the intended ports.

Q: Do I need separate transceiver modules?
A: No. The QSFP28 and SFP28 ends are integrated into the cable; no additional optics are required.

Q: What is the reach of this model?
A: 3 meters. If you need a different length, consider the 1 m, 2 m, or 5 m options.

Q: Does it support auto-negotiation for 25G?
A: It presents the appropriate EEPROM for 25G lanes; the host must support 100G→4x25G breakout mode.

Technical Specifications

- Interface/form factor: QSFP28 to 4x SFP28 direct-attach copper (DAC)
- Aggregate data rate: 100 Gbps (4 x 25 Gbps lanes)
- Cable type: passive twinax copper (no external power)
- Length: 3 meters
- Standards: 100GBASE-CR4 and 25GBASE-CR; QSFP28/SFP28 MSA compliant
- Connectors: QSFP28 (host) and 4x SFP28 (device)
- Operation: hot-swappable; low latency, low power
- Use case: break out a single 100G port to four independent 25G ports
- Compatibility: requires platform support for 100G→4x25G breakout

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