# Passive Direct Attach Copper Cables (DACs)

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Use passive DACs for supported short-reach, high-speed links, such as within a rack. Check device support, data rate and cable length.

## Passive Direct Attach Copper Cables (DACs)

Passive direct-attach copper cables

Use passive DACs for supported short-reach, high-speed links, such as within a rack. Check device support, data rate and cable length.

- Applications

In-rack uplinks and short server-to-switch connections.

- Supply Scope

Point-to-point DACs · Breakout DACs · Different data rates and connector form factors

- Information for an Inquiry

Complete model or configuration, quantity, equipment location or destination, and required dates. Quote, condition, accessories and warranty are confirmed separately.

## From application to equipment list

Specification examples help define requirements. Support depends on the exact model, platform documentation and supplier information.

### Common Types & Supporting Components

- Point-to-point DACs

- Breakout DACs

- Different data rates and connector form factors

- Options for different wire gauges and lengths

In-rack uplinks and short server-to-switch connections.

### Key Specifications

- Ports

Equipment, interfaces and protocols at both ends

- Data Rate

Link data rates supported by the equipment

- Length

Target reach and host-supported cable lengths

- Cable Configuration

Point-to-point or breakout configuration and lane mapping

- Compatibility

Host coding and firmware requirements

- Installation

Wire gauge, bend limits and port clearance

### Four Checks Before Purchasing

- 01Confirm length against equipment support limits

- 02Check both host compatibility and protocol

- 03Confirm port breakout settings for breakout configurations

- 04Specify wire gauge, routing and accessories

## Coordinate the product, accessories and delivery

Submit a complete model or project bill of materials so we can check compatibility, main units, accessories, quantities, lead times and destination. Compare supply sources, volume purchasing and phased delivery for the actual requirement.

Source, condition, specifications, tests, warranty and after-sales scope are confirmed separately in the quotation and order. This page describes purchasing scope; actual models, quantities and prices depend on the inquiry result.

## Related Equipment & Parts

Check the platform and application together to avoid mismatches between main equipment and accessories.

### High-Speed Network Adapters

High-speed network adapters

Choose server network adapters for protocol, port speed, form factor and host platform, with switches and optical interconnects specified together.

- Ethernet adapters

- InfiniBand host channel adapters for the relevant platform

- PCIe or OCP network adapters

Check: protocol · data rate · form factor

### Data Center Switches

Data-center switches

Source switches for rack uplinks, compute clusters and storage networks, checking protocols, ports, topology, management and software licensing.

- Ethernet switches

- InfiniBand switches for the network design

- Top-of-rack (ToR) switches

Check: topology · ports · software

### Optical Transceivers

Optical transceivers

Choose optical transceivers for host ports, reach, fiber type and host coding compatibility, rather than nominal data rate alone.

- SFP-family optical transceivers

- QSFP-family optical transceivers

- OSFP and other supported form factors

Check: host · form factor · optical link

Images illustrate product categories. Some use related equipment or application scenes. They do not identify a specific model, connector, configuration, stock position or supply commitment. Confirm appearance, specifications, condition and delivery terms against the agreed product documentation and order.