logo
Solutions
GPU Repair
GPU Cloud Rental
Resources
About Us
Contact Us
FREE SHIPPING on Orders Over US$99
Free Quotation

English English

By clicking the "Submit", you agree that your information is collected and used for the purpose of responding to your inquiry in accordance with the Privacy Policy and Terms of Use
Submit
Cisco Compatible 400GBASE-SR4 QSFP-DD PAM4 850nm 100m DOM MPO-12/APC MMF Ethernet Optical Transceiver Module
Cisco Compatible 400GBASE-SR4 QSFP-DD PAM4 850nm 100m DOM MPO-12/APC MMF Ethernet Optical Transceiver Module
Cisco Compatible 400GBASE-SR4 QSFP-DD PAM4 850nm 100m DOM MPO-12/APC MMF Ethernet Optical Transceiver Module
P/N: QDD-400G-SR4
$429.00
3
Solds
12
Reviews
4
Questions
safeguard
4-Year Warranty
30-Day Returns
30-Day Exchange
（1 In Stock）

Product Highlights

Built-in Maxlinear Chip, Max. Power Consumption 8W
Tested in Targeted Switches for Superior Performance, Quality, and Reliability
Compliant with QSFP-DD MSA, CMIS Rev5.2
Hot Pluggable QSFP-DD Form Factor
High-speed Electrical Compliant to IEEE802.3bs
8x 50G PAM4 Retimed 400GAUI-8 Electrical Interface
QSFP-DD Port is Backward Compatible with QSFP+, QSFP28 and QSFP56 Modules
See more
Specifications
Certification
Connectivity Solutions
Comparison Table
Q&A
Reviews
Resources
Cisco Compatible 400GBASE-SR4 QSFP-DD PAM4 850nm 100m DOM MPO-12/APC MMF Ethernet Optical Transceiver Module
The 400GBASE-SR4 module, MTP/MPO-12 connector, up to 100m over parallel OM4 multi-mode fiber. It is compliant to IEEE 802.3bs protocol and 400GAUI-8 standard.The 400 Gigabit Ethernet signal is carried over four parallel lanes by one wavelength per lane. It can support 2 x 200G-SR and 4 x 100G-SR.
Specifications
Form Factor
QSFP-DD
Data Rate
425Gbps
Media
MMF
Wavelength
850nm
Connector
MTP/MPO-12 APC
Distance
30m@OM3 50m@OM4
Transmitter Type
VCSEL
Receiver Type
PIN
Electrical Modulation
8x 53.125G PAM4
Optical Modulation
4x 106.25 PAM4
Power Consumption
≤9.0W
Case Operating Temperature
0 to 70°C (32 to 158°F)
Protocol
400 Gigabit Ethernet
Application
Swicth to Switch Switch to NIC Other Optical Links
Certification
Product
Product
Product
Product
Product
Product
Product
Product
Product
Product
Connectivity Solutions
Cisco Nexus Switch links：400G QSFP-DD to 400G QSFP-DD
All
Cisco Nexus Switch links：400G QSFP-DD to 400G QSFP-DD
Comparison Table
Cisco Compatible 400G QSFP-DD SR8 100m 850nm MPO-16/APC MMF Transceiver Module
QDD-400G-SR8
Cisco QDD-400G-FR4 Compatible 400GBASE-FR4 QSFP-DD PAM4 1310nm 2km DOM Duplex LC/UPC SMF Optical Transceiver Module
QDD-400G-FR4
Cisco Compatible 400G QSFP-DD SR4 100m 850nm MPO-12/APC Transceiver Module
QDD-400G-SR4
Cisco Compatible 400G QSFP-DD DR4 500m 1310nm MPO-12/APC Transceiver Module
QDD-400G-DR4
Form Factor QSFP-DDQSFP-DDQSFP-DDQSFP-DD
Data Rate 425Gbps425Gbps425Gbps425Gbps
Media MMFSMFMMFSMF
Wavelength 850nm1264.5~1277.5nm@Lane 0 1284.5~1297.5nm@Lane 1 1304.5~1317.5nm@Lane 2 1324.5~1337.5nm@Lane 3850nm1310nm
Connector MTP/MPO-16 APCDuplex LC UPCMTP/MPO-12 APCMTP/MPO-12 APC
Distance 70m@OM3 100m@OM42km30m@OM3 50m@OM4500m
Transmitter Type VCSELEMLVCSELEML
Receiver Type PINPINPINPIN
Electrical Modulation 8x 53.125G PAM48x 53.125G PAM48x 53.125G PAM48x 53.125G PAM4
Optical Modulation 8x 53.125G PAM44x 106.25 PAM44x 106.25 PAM44x 106.25 PAM4
Power Consumption ≤10.0W≤9.0W≤9.0W≤9.0W
Case Operating Temperature 0 to 70°C (32 to 158°F)0 to 70°C (32 to 158°F)0 to 70°C (32 to 158°F)0 to 70°C (32 to 158°F)
Protocol 400 Gigabit Ethernet 2x 200G Breakout Ethernet 4x 100G Breakout Ethernet400 Gigabit Ethernet400 Gigabit Ethernet400 Gigabit Ethernet 4x 100G Breakout Ethernet
Application Swicth to Switch Switch to NIC Other Optical LinksSwicth to Switch Other Optical LinksSwicth to Switch Switch to NIC Other Optical LinksSwicth to Switch Switch to NIC Other Optical Links
Form Factor
Data Rate
Media
Wavelength
Connector
Distance
Transmitter Type
Receiver Type
Electrical Modulation
Optical Modulation
Power Consumption
Case Operating Temperature
Protocol
Application
Cisco Compatible 400G QSFP-DD SR8 100m 850nm MPO-16/APC MMF Transceiver Module
QDD-400G-SR8
Cisco QDD-400G-FR4 Compatible 400GBASE-FR4 QSFP-DD PAM4 1310nm 2km DOM Duplex LC/UPC SMF Optical Transceiver Module
QDD-400G-FR4
Cisco Compatible 400G QSFP-DD SR4 100m 850nm MPO-12/APC Transceiver Module
QDD-400G-SR4
Cisco Compatible 400G QSFP-DD DR4 500m 1310nm MPO-12/APC Transceiver Module
QDD-400G-DR4
QSFP-DD
QSFP-DD
QSFP-DD
QSFP-DD
425Gbps
425Gbps
425Gbps
425Gbps
MMF
SMF
MMF
SMF
850nm
1264.5~1277.5nm@Lane 0 1284.5~1297.5nm@Lane 1 1304.5~1317.5nm@Lane 2 1324.5~1337.5nm@Lane 3
850nm
1310nm
MTP/MPO-16 APC
Duplex LC UPC
MTP/MPO-12 APC
MTP/MPO-12 APC
70m@OM3 100m@OM4
2km
30m@OM3 50m@OM4
500m
VCSEL
EML
VCSEL
EML
PIN
PIN
PIN
PIN
8x 53.125G PAM4
8x 53.125G PAM4
8x 53.125G PAM4
8x 53.125G PAM4
8x 53.125G PAM4
4x 106.25 PAM4
4x 106.25 PAM4
4x 106.25 PAM4
≤10.0W
≤9.0W
≤9.0W
≤9.0W
0 to 70°C (32 to 158°F)
0 to 70°C (32 to 158°F)
0 to 70°C (32 to 158°F)
0 to 70°C (32 to 158°F)
400 Gigabit Ethernet 2x 200G Breakout Ethernet 4x 100G Breakout Ethernet
400 Gigabit Ethernet
400 Gigabit Ethernet
400 Gigabit Ethernet 4x 100G Breakout Ethernet
Swicth to Switch Switch to NIC Other Optical Links
Swicth to Switch Other Optical Links
Swicth to Switch Switch to NIC Other Optical Links
Swicth to Switch Switch to NIC Other Optical Links
Questions & Answers
edit icon Ask a question
All (4) Application (2)Compatibility (1)Performance (1)
Q:

What’s the typical BER (Bit Error Rate)?

by 5***m on 2025-06-26 03:13:48

A:

Typical BER is under normal operation.

by AICPLIGHT on 2025-06-27 02:40:23

like icon Helpful 0
comment icon Comment 0
Q:

Is this product suitable for data center deployments?

by i***m on 2025-04-01 15:32:06

A:

Absolutely, all models are designed for high-density data center environments.

by AICPLIGHT on 2025-04-02 06:39:55

like icon Helpful 0
comment icon Comment 0
Q:

Can these modules work with Cisco or Juniper platforms?

by K***m on 2025-03-01 16:01:11

A:

Yes, we ensure cross-vendor compatibility with most major brands.

by AICPLIGHT on 2025-03-01 20:56:29

like icon Helpful 0
comment icon Comment 0
Q:

Is this product designed for enterprise LANs?

by U***m on 2024-12-23 21:29:24

A:

Yes, lower speed modules are ideal for LAN and campus networks.

by AICPLIGHT on 2024-12-24 20:08:18

like icon Helpful 0
comment icon Comment 0
Customer Reviews
edit icon Write a review
All (12) Performance (3)Compatibility (2)Ease of Use (4)Customer Support (3)
s
s***m
2025-07-05 06:39:52
Confirmed Purchase
5.0

These modules were pre-programmed and ready to install out of the box—zero configuration needed.

link icon Helpful 0
comment icon Comment 0
q
q***m
2025-06-18 19:26:30
Confirmed Purchase
5.0

The pre-sales consultation was detailed and tailored to our specific data center needs. Very professional experience.

link icon Helpful 0
comment icon Comment 0
K
K***m
2025-05-27 03:22:09
Confirmed Purchase
5.0

These modules were pre-programmed and ready to install out of the box—zero configuration needed.

link icon Helpful 0
comment icon Comment 0
w
w***m
2025-05-21 13:32:13
Confirmed Purchase
5.0

These Ethernet modules run flawlessly under sustained 800G load, with consistent throughput and thermal stability.

link icon Helpful 0
comment icon Comment 0
t
t***m
2025-05-15 01:11:59
Confirmed Purchase
5.0

The signal quality remains intact even at extended range over single-mode fiber.

link icon Helpful 0
comment icon Comment 0
i
i***m
2025-05-08 07:55:09
Confirmed Purchase
5.0

The latch design makes removal and re-insertion quick even in tight spaces.

link icon Helpful 0
comment icon Comment 0
U
U***m
2025-05-04 07:21:30
Confirmed Purchase
5.0

Recognized immediately by our monitoring system—no configuration needed.

link icon Helpful 0
comment icon Comment 0
6
6***m
2025-04-28 22:28:35
Confirmed Purchase
5.0

After deployment, support followed up to ensure the modules had passed our internal benchmarks.

link icon Helpful 0
comment icon Comment 0
H
H***m
2025-04-26 05:43:43
Confirmed Purchase
5.0

Ideal for large-scale cloud and DCI applications—maintains excellent performance across long-haul distances.

link icon Helpful 0
comment icon Comment 0
Y
Y***m
2025-04-24 18:20:45
Confirmed Purchase
5.0

Fully interoperable with Arista, Dell, and white-box switches in our lab.

link icon Helpful 0
comment icon Comment 0
h
h***m
2025-04-16 05:27:36
Confirmed Purchase
5.0

The plug-and-play functionality helped speed up our Ethernet DCI rollout significantly.

link icon Helpful 0
comment icon Comment 0
i
i***m
2025-04-04 20:10:52
Confirmed Purchase
5.0

Technical support provided clear guidance on 800G-to-2x400G breakouts for our aggregation layer.

link icon Helpful 0
comment icon Comment 0
contact us