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Cisco

Cisco SFP-50G-CU3M | 50G DAC | SFP56 50GBASE-CR, Passive Twinax, 3m | SFP56–SFP56

SKU:SFP-50G-CU3M

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Description

High-performance 50GbE SFP56 direct-attach copper cable for short-reach, low-latency server-to-switch links. Passive twinax design delivers near-zero power draw and minimal latency while meeting IEEE 802.3cd 50GBASE-CR electrical specifications. Ideal for top-of-rack deployments where simplicity and reliability matter.

Features

- True 50GbE SFP56-to-SFP56 connectivity
- Passive twinax for near-zero power and minimal latency
- Hot-swappable SFP56 ends with secure latching
- EMI-shielded construction for signal integrity
- Standards-based 50GBASE-CR compliance
- Optimized for top-of-rack and short-reach interconnects

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 vendor-coded and do both ends need to match the platform?
A: Yes. SFP56 DACs are often vendor-coded; ensure the coding matches the platforms at both ends or that your equipment supports generic DACs.

Q: Is this an active or passive cable?
A: It is a passive twinax DAC, relying on the host PHY—offering very low latency and near-zero power draw.

Q: Can this 50G SFP56 DAC run at 25G?
A: Use only with 50G SFP56-capable ports. Downspeed to 25G is platform-dependent and not guaranteed.

Q: Does it support breakout configurations?
A: No. SFP56 is a single-lane form factor and does not support breakouts.

Q: What is the recommended bend radius?
A: Follow standard twinax handling: a minimum bend radius of about 10× the cable diameter and avoid sharp bends or kinks.

Technical Specifications

- Data rate: 50 GbE (PAM4)
- Standard: IEEE 802.3cd 50GBASE-CR
- Form factor: SFP56 on both ends
- Cable type: Passive twinax DAC
- Length: 3 m
- Power: ~0.1 W (passive, host-powered)
- Latency: Ultra-low (no DSP)
- Operating temperature: 0 to 70 °C (standard)
- Hot-swappable: Yes
- Compliance: RoHS

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