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Reliable 40G SR4 optics for multimode fiber deployments.
QSFP-40G-SR4-S
40GBASE-SR4 QSFP Trnscvr Module, MPO Conn, Enterprise-Class
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Name:
QSFP-40G-SR4-S
- Description:
- 40GBASE-SR4 QSFP Trnscvr Module, MPO Conn, Enterprise-Class
- Rating:
Added to cart 28 times recently
- Availability:
In stock - Ready to Ship
- Brand:
- Cisco
- GTIN:
- 652513837248
- Condition:
- Warranty:
- 3
- List Price:
$2,022.36
- Price:
$323.5884% off
Quantity:
1
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QSFP-40G-SR4-S Overview
The QSFP-40G-SR4-S is a high-performance Cisco QSFP+ transceiver designed for reliable 40-Gigabit Ethernet connectivity over short-range multimode fiber. This Cisco QSFP-40G-SR4-S module supports 40GBASE-SR4 applications, enabling seamless deployment across enterprise switching, data center architectures, and high-density cloud environments. With strong optical performance, it supports transmission distances up to 100 meters on OM3 fiber and 150 meters on OM4 fiber, making it ideal for short-range, high-bandwidth 40G uplinks and aggregation layers.
Built for consistent signal integrity and broad Cisco platform compatibility, the QSFP 40G SR4 S module provides low-latency performance, high throughput, and simple plug-and-play installation. Its hot-swappable design allows rapid integration or replacement without service interruption, offering a scalable and cost-efficient solution for organizations expanding their 40-Gigabit multimode fiber infrastructure.
Capabilities
Short-Range 40G Fiber Connectivity
Supports up to 100m on OM3 and 150m on OM4 multimode fiber.
40GBASE-SR4 Performance
Optimized for short-distance 40-Gigabit Ethernet applications across enterprise and data center networks
Hot-Swappable Design
Allows installation or replacement without impacting network operations.
Low-Latency Optical Transmission
Delivers high-throughput, stable performance for demanding workloads.
Multimode Fiber Support
Enables flexible deployment across various multimode cabling infrastructures.
Supported Hardware Models
TThe QSFP-40G-SR4-S module is compatible with major Cisco platforms, including :
- Cisco Catalyst 4500X Series
- Cisco Catalyst 6800 Series
- Cisco Nexus 3000 Series
- Cisco Nexus 5000 Series
- Cisco Nexus 7000 Series
- Cisco Nexus 9000 Series
This broad compatibility ensures seamless integration across enterprise, cloud, and high-density data center environments.
Why Choose the QSFP-40G-SR4-S
- Ideal for short-range 40G multimode fiber deployments
- Broad compatibility across Cisco Catalyst and Nexus switches
- Delivers stable, high-performance 40G optical connectivity
- Supports plug-and-play installation for simplified scaling
- A cost-efficient option for expanding 40G network capacity
QSFP-40G-SR4-S price is $323.58, a 84% saving from the Cisco list price of $2,022.36. QSFP-40G-SR4-S is in stock and available for next-day dispatch. (terms applied)
Request bulk order quote for QSFP-40G-SR4-S for additional pricing. Browse the full 40G Base Modules series or explore all Cisco products.
QSFP-40G-SR4-S Specifications
- Product Type
- Transceiver
- Form Factor
- QSFP
- Data Rate
- 40G
- Connector Type
- MPO
- Wavelength
- 850 nm
- Transmission Distance
- Short-Range
- Fiber Type
- Multi-mode
- Max Distance
- 100 meters
- Supported Protocols
- Ethernet
- Network Interface
- Ethernet
- Power Consumption
- 4 W
- Operating Temperature
- 0 to 70°C
- Storage Temperature
- -40 to 85°C
- Input Voltage
- 3.3V
- Compatibility
- Cisco / Juniper / Huawei / Arista
- Product Name
- QSFP-40G-SR4-S
- Height
- N/A
- Width
- N/A
- Depth
- N/A
- Weight
- N/A
QSFP-40G-SR4-S Use Case
Hyperscale Data Center Spine-Leaf Aggregation with QSFP-40G-SR4-S
In a multi-tenant data center deploying a spine-leaf topology, the QSFP-40G-SR4-S module with MPO connectivity delivers 160 Gbps of aggregate bandwidth per QSFP port. By enabling high-density, low-latency east-west traffic and reducing fiber runs by 75%, operators achieve predictable performance for virtualization and containerized workloads while lowering OPEX through simplified cabling and cooling.
Enterprise Campus Backbone Migration from 10G to 40G
A global enterprise upgrades its core distribution layer to 40 GbE using QSFP-40G-SR4-S transceivers over existing multimode fiber trunks. This migration quadruples backbone capacity without additional fiber investment, accelerates application response times by up to 60%, and future-proofs the network for IoT, video conferencing, and cloud access with enterprise-class reliability and simplified MPO terminations.
High-Performance Computing Cluster Interconnect
In an HPC cluster for AI training and scientific simulation, QSFP-40G-SR4-S modules enable ultra-high throughput inter-node links over parallel MPO fiber. Engineers realize sub-2 µs latencies and sustained 40 Gbps per link, accelerating model convergence by 30% and maximizing GPU/CPU utilization. The enterprise-class design ensures consistent performance under heavy compute loads and eases rack-to-rack deployment.
Quality Certifications
To get the detailed certification, please go to the Compliance Center.
Product Comparison Table
 QSFP-40G-SR4-S |  QSFP-4X10G-AOC7M= |  QSFP-H40G-AOC3M= |  QSFP-H40G-AOC7M= |  WSP-Q40GLR4L | |
|---|---|---|---|---|---|
| Compatibility | Cisco / Juniper / Huawei / Arista | Cisco / Juniper / Huawei / Arista | Cisco / Juniper / Huawei / Arista | Cisco / Juniper / Huawei / Arista | Cisco / Juniper / Huawei / Arista |
| Connector Type | MPO | Direct Attach | QSFP | MPO | LC |
| Data Rate | 40G | 4x10G | 40G | 40G | 40G |
| Depth | N/A | N/A | N/A | N/A | 1.8 inches |
| Fiber Type | Multi-mode | Multi-mode | Multi-mode | N/A | Single-mode |
| Form Factor | QSFP | QSFP | QSFP | QSFP | QSFP+ |
| Height | N/A | N/A | N/A | N/A | 0.54 inches |
| Input Voltage | 3.3V | 3.3V | 3.3V | 3.3V | 3.3V |
| Max Distance | 100 meters | 7 meters | 3 m | 7m | 10 km |
| 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 | 4 W | N/A | N/A | N/A | 4.8W |
| Product Name | QSFP-40G-SR4-S | QSFP-4X10G-AOC7M= | QSFP-H40G-AOC3M= | QSFP-H40G-AOC7M= | WSP-Q40GLR4L |
| 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 | Ethernet | Ethernet |
| Transmission Distance | Short-Range | Short-Range | Short-Range | Short-Range | Long-Range |
| Wavelength | 850 nm | N/A | N/A | N/A | 1271/1291/1311/1331 nm |
| Weight | N/A | N/A | N/A | N/A | 0.2 lbs |
| Width | N/A | N/A | N/A | N/A | 0.54 inches |
Reviews & Ratings
K
Kevin Russell
4
Plug-and-play installation with stable throughput.
B
Brian Adams
5
Works well for aggregation layer connections.
J
Jason Grant
3
Consistent performance in high-density environments.
M
Mark Collins
4
Dependable optics for enterprise networks.
Questions & Answers
What is the QSFP-40G-SR4-S 40GBASE-SR4 QSFP transceiver module?
The QSFP-40G-SR4-S is an enterprise-class, hot-pluggable QSFP+ transceiver supporting 40GBase-SR4 over multimode fiber with an MPO connector.
Which IEEE standard does QSFP-40G-SR4-S comply with?
It complies with IEEE 802.3ba for 40GBase-SR4, ensuring full interoperability with compliant network equipment.
What fiber types and link distances are supported?
It supports OM3 multimode fiber up to 100 m and OM4 multimode fiber up to 150 m using a 12-fiber MPO/MTP cable.
What connector type does the QSFP-40G-SR4-S use?
The module uses a 12-fiber MPO/MTP connector for parallel optics, enabling four 10 Gbps lanes.