MikroTik DDQ+DA0003 QSFP-DD 400G Direct Attach Cable 3m

The MikroTik DDQ+DA0003 is the 3-metre direct attach cable companion to the CRS812 and CRS804 400G aggregation switches — purpose-built for inter-rack connections where the 1-metre DDQ+DA0001 falls short in reach but a full optical module deployment is unnecessary.

Direct attach copper cables are the standard choice for short-range high-speed connections inside a data centre. There are no transceivers to source separately, no fiber runs to terminate, and no per-port optical power budgets to calculate. The integrated QSFP-DD modules on both ends are factory-matched to the cable — plug one end into the CRS812 or CRS804, the other into the peer device, and the link comes up at full 400G.

The 3-metre reach makes the DDQ+DA0003 the practical choice for top-of-rack to end-of-row connections, cross-aisle links in two-row or three-row data hall layouts, and any 400G connection that is too long for a 1m DAC but too short to justify structured fiber cabling and optical modules.

Key features:

- QSFP-DD form factor — integrated modules on both ends, no separate transceivers required

- 400G aggregate bandwidth — full 400G passive copper direct attach

- 3-metre cable length — flexible inter-rack and cross-aisle reach

- Passive copper design — no power consumption beyond the host port, no cooling overhead

- Energy-efficient — no active components, no laser management

- Plug-and-play — no configuration, no fiber termination, no optical power budget

- Compatible with: MikroTik CRS812, CRS804, and any device with a QSFP-DD 400G port

- MTBF ~200,000 hours at 25°C

- Product code: DDQ+DA0003

- Suggested price: USD 109.00

Note: This is a passive copper DAC. It is not suitable for distances beyond 3 metres or for deployments requiring electrical isolation between endpoints. For distances up to 100m, use the DDQ+85MP01D optical module with MTP/MPO-16 fiber.

Ideal for: inter-rack 400G connections on CRS812 and CRS804 deployments, top-of-rack to end-of-row links, cross-aisle connections in structured data hall layouts, and any 400G link where passive copper is preferred over optical for cost, simplicity, and energy efficiency at distances of 3 metres or less.