QDD-400-CU3M, Cisco 400G QSFP-DD Direct Attach Cable, 3 m assembly length, QSFP-DD to QSFP-DD

Model:

QDD-400-CU3M

Detail:

QDD-400-CU3M - Cisco 400G QSFP-DD direct-attach copper cable (3 m assembly length). Pre-terminated QSFP-DD to QSFP-DD assembly, Passive, no external power, Commercial, 0 to 70 °C. New factory sealed, 5-year warranty.

List Price:

US$ 1,036.48

Price:

US$881.01

Availability:

In Stock

Condition:

New Factory Sealed

Delivery:

1 Month Standard Lead Time
Need it sooner? Contact our sales team.

Tags:

400G Fiber Optic

Add to Cart

Specification

Parameter Category	Specification
Model Number	QDD-400-CU3M
Product Type	400G QSFP-DD passive direct-attach copper cable, 3 m
Form Factor	QSFP-DD
Data Rate	400G Ethernet
Wavelength	—
Fiber / Media	Passive copper (twinax)
Reach / Length	3 m assembly length
Connector	QSFP-DD to QSFP-DD
Bail Latch Color	—
Power Consumption	Passive, no external power
Operating Temperature	Commercial, 0 to 70 °C
Digital Optical Monitoring	Not applicable
Compatibility	Cisco switches, routers and firewalls with 400G QSFP-DD ports
Condition	New Factory Sealed
Warranty	5 years

Comparison with Related Cisco Optics

Parameter	QDD-400-CU3M	QDD-400G-DR4-S	QDD-400G-SR4.2-BD
Form Factor	QSFP-DD	QSFP-DD	QSFP-DD
Data Rate	400G	400G	400G
Wavelength	—	1310 nm	850 nm
Reach / Length	3 m assembly length	500 m	70 m on OM3 / 100 m on OM4
Connector	QSFP-DD to QSFP-DD	MPO-12 (MTP)	MPO-12 (MTP)
Typical Use	In-rack / intra-DC	Long haul	In-rack / intra-DC

Q&A

How long is the Cisco QDD-400-CU3M?

The Cisco QDD-400-CU3M is a 400G QSFP-DD direct-attach copper cable measuring 3 m. Because the modules are factory-terminated at both ends, the cable cannot be shortened or re-terminated in the field — order the exact length required.

Is the Cisco QDD-400-CU3M copper or optical?

It is a direct-attach copper cable (Passive copper (twinax)): Passive, no external power, terminated with QSFP-DD to QSFP-DD connectors. It carries the link without separate transceivers at each end.

How does the Cisco QDD-400-CU3M compare with the Cisco QDD-400G-DR4-S?

The QDD-400-CU3M reaches 3 m assembly length over Passive copper (twinax), while the QDD-400G-DR4-S reaches 500 m over Single-mode fiber (SMF). Pick the shortest reach that covers the link distance — going longer than needed costs more and adds optical budget margin you will not use.

Support FAQ

Warranty terms

We promise that our products are original and genuine only. Brand-new products will be brand new and sealed to ensure no malfunctions, and second-hand products will undergo strict testing before shipment.

We offer a 1-year warranty for brand-new products and a 90-day warranty for second-hand products. During the warranty period, if the equipment you purchase has any operational defects, we will replace it for you (the warranty does not cover faults caused by human damage and improper use).

Once the product malfunctions, please notify us as soon as possible, and we will appreciate your detailed description or photos.

The warranty period is calculated from the date of receipt of the goods. For any issues or inquiries regarding your purchase, please feel free to contact us via WhatsApp (+86 152 7186 6615) or Skype/Email: sales@infdevice.com

Hot product

C9200L-24P-4G-E C9300-24P-A C9500-16X-A N9K-C93180YC-FX ISR4331/K9 C1000-48T-4G-L C8200-1N-4T C8300-1N1S-6T N9K-C93600CD-GX C9200L-48T-4G-E C9200-24T-E C9300-48T-A C9300L-24P-4X-E C8500L-8S4X