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Colton Hayes
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Reliable 2m cable delivering stable 400G speeds. Ideal for rack-level connectivity.
QDD-400-CU2M
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Ready to Ship
400G Passive Cable, 2m
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Name:
QDD-400-CU2M
- Description:
- 400G Passive Cable, 2m
- Rating:
Added to cart 28 times recently
- Availability:
In stock - Ready to Ship
- Brand:
- Cisco
- GTIN:
- 195285201645
- Condition:
- Warranty:
- 3
- List Price:
$1,002.00
- Price:
$527.0047.4% off
Quantity:
1
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QDD-400-CU2M Overview
QDD-400-CU2M is a high-performance QSFP-DD transceiver module designed for short-range, 400G Ethernet applications. It features direct attach copper twinaxial connectors that support a data rate of 400G, making it an ideal solution for data centers, enterprise networks, and telecom environments where high throughput and low latency are critical.
Engineered with a compact form factor and precise physical dimensions for seamless integration, QDD-400-CU2M supports industry-standard Ethernet protocols, ensuring reliable network connectivity across server racks and switch-to-switch links. Its short-range transmission capability and robust design make it particularly well-suited for high-density deployments in modern datacenter infrastructures.
QDD-400-CU2M price is $527.00, a 47.4% saving from the Cisco list price of $1,002.00. QDD-400-CU2M is in stock and available for next-day dispatch. (terms applied)
Request bulk order quote for QDD-400-CU2M for additional pricing. Browse the full Cisco 400G Optical Modules series or explore all Cisco products.
QDD-400-CU2M Specifications
- Product Type
- Transceiver
- Form Factor
- QSFP-DD
- Data Rate
- 400G
- Connector Type
- Twinaxial
- Wavelength
- N/A
- Transmission Distance
- Short-Range
- Fiber Type
- N/A
- Max Distance
- 2 meters
- Supported Protocols
- Ethernet
- Network Interface
- Ethernet
- Power Consumption
- N/A
- Operating Temperature
- 0 to 70°C
- Storage Temperature
- -40 to 85°C
- Input Voltage
- N/A
- Compatibility
- Cisco / Juniper / Huawei / Arista
- Product Name
- QDD-400-CU2M
- Height
- N/A
- Width
- N/A
- Depth
- N/A
- Weight
- N/A
Quality Certifications
To get the detailed certification, please go to the Compliance Center.
Product Comparison Table 
| QDD-400-CU2M |  QDD-400G-LR8-S |  QDD-2X100-CWDM4-S |  QDD-400G-DR4-S |  QDD-2X100-SR4-S | |
|---|---|---|---|---|---|
| Compatibility | Cisco / Juniper / Huawei / Arista | Cisco / Juniper / Huawei / Arista | Cisco / Juniper / Huawei / Arista | Cisco, Juniper, Huawei, Arista | Cisco, Juniper, Huawei, Arista |
| Connector Type | Twinaxial | LC | LC | LC | LC |
| Data Rate | 400G | 400G | 100G | 400G | 2x100G |
| Depth | N/A | 1.68 inches | 1.78 inches | 2.20 inches | N/A |
| Fiber Type | N/A | Single-mode | Single-mode | Multi-mode | Multi-mode |
| Form Factor | QSFP-DD | QSFP-DD | QSFP28 | QSFP-DD | QSFP28 |
| Height | N/A | 0.80 inches | 0.67 inches | 0.44 inches | N/A |
| Input Voltage | N/A | 3.3V | 3.3V | 3.3V | 3.3V |
| Max Distance | 2 meters | 10 km | 2000 meters | 500 meters | 100 meters (OM4) |
| Network Interface | Ethernet | Ethernet | Fiber | Ethernet | Fiber |
| Operating Temperature | 0 to 70°C | 0 to 70°C | 0 to 70°C | 0 to 70°C | 0 to 70°C |
| Power Consumption | N/A | 20 W | 6 W | N/A | 6.5W |
| Product Name | QDD-400-CU2M | QDD-400G-LR8-S | QDD-2X100-CWDM4-S | QDD-400G-DR4-S | QDD-2X100-SR4-S |
| Product Type | Transceiver | Transceiver | Transceiver | Transceiver | Transceiver |
| Storage Temperature | -40 to 85°C | -40 to 85°C | -40 to 85°C | -40 to 85°C | -40 to 85°C |
| Supported Protocols | Ethernet | Ethernet | Ethernet / Fibre Channel | Ethernet, Fibre Channel | Ethernet |
| Transmission Distance | Short-Range | Long-Range | Short-Range | Short-Range | Short-Range |
| Wavelength | N/A | 1310 nm | 1271/1291/1311/1331 nm | N/A | 850 nm |
| Weight | N/A | 0.25 lbs | 0.34 lbs | 0.12 lbs | N/A |
| Width | N/A | 0.66 inches | 0.98 inches | 0.85 inches | N/A |
Reviews & Ratings
B
Brent Hollister
5
Strong connector quality and consistent signal integrity.
G
Garrett Nicholson
4
Maintains full bandwidth with zero compatibility issues.
A
Austin Merrick
5
Efficient passive solution for short interconnect distances.
D
Derrick Lawson
5
Solid performance under heavy traffic conditions.
C
Clayton Reeves
4
Durable and dependable for high-speed deployments.
H
Hunter Beaumont
5
Reliable 400G passive cabling for compact environments.
Questions & Answers
What is the QDD-400-CU2M 400G Passive Cable?
The QDD-400-CU2M is a 2 meter QSFP-DD to QSFP-DD copper direct-attach cable (DAC) designed for 400 Gbps data transmission in high-density data centers.
What connectors does the QDD-400-CU2M use?
It features two QSFP-DD connectors with gold-plated contacts for reliable mating and low insertion loss.
What is the maximum data rate of this 400G passive cable?
The cable supports an aggregate data rate of 400 Gbps, achieved via eight 50 Gbps differential lanes.
How long is the QDD-400-CU2M cable?
This passive DAC is 2 meters in length, ideal for rack-to-rack or switch-to-switch connections in server rooms.