United States$5,000,000+
Inventory Delivered By
H
Harper Wells
5
Reliable 40G SR4 module with MPO connection. Excellent for enterprise-class data centers.
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:
- 648291993139
- Condition:
- Warranty:
- 3
- List Price:
$1,994.00
- Price:
$337.0083.1% off
Quantity:
1
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QSFP-40G-SR4-S= Overview
QSFP-40G-SR4-S= is a QSFP transceiver module designed to support a 40G Ethernet data rate for short-range optical communications. Built to comply with 40GBASE-SR4 standards, this module features MPO connector technology and operates over multi-mode fiber, delivering reliable performance in data centers and enterprise networks.
QSFP-40G-SR4-S= offers a compact form factor with physical dimensions that suit high-density applications and is engineered for optimal performance over short distances. Its design meets the rigorous demands of modern telecom and data center environments by supporting industry-standard protocols and providing seamless integration with major network vendors.
QSFP-40G-SR4-S= price is $337.00, a 83.1% saving from the Cisco list price of $1,994.00. 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
- 70-100 meters
- Supported Protocols
- Ethernet
- Network Interface
- Fiber
- Power Consumption
- 4.0W
- 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
High-Density 40G Spine-Leaf Aggregation in Hyperscale Data Centers
Scenario: A global cloud provider deploys QSFP-40G-SR4-S modules with MPO connectivity in a leaf-spine fabric to aggregate thousands of 10G/25G Top-of-Rack switches over OM4 multimode fiber. Benefit: Delivers 40 Gbps uplinks with parallel-optics simplicity, reduces switch port utilization by 60%, and achieves sub-2 µs latency at scale, ensuring predictable performance for mission-critical workloads.
Low-Latency Interconnect for HPC and AI Training Clusters
Scenario: A university supercomputing center integrates QSFP-40G-SR4-S transceivers to interlink GPU-accelerated nodes over multimode fiber in a non-blocking switch fabric. Benefit: Provides deterministic low-latency (≤0.6 µs) and 40 Gbps bidirectional links, boosting parallel job throughput by up to 30% and accelerating large-scale simulations and deep-learning model training.
Enterprise Campus Core and Distribution Uplinks
Scenario: A multinational financial institution upgrades its campus network core and distribution layers with QSFP-40G-SR4-S MPO transceivers over OM4 cabling to consolidate 1 Gbps and 10 Gbps edge switches. Benefit: Achieves seamless 40 Gbps aggregation, simplifies fiber management with ribbon cables, and reduces power consumption by 25%, delivering scalable bandwidth headroom for virtualization and real-time analytics.
Quality Certifications
To get the detailed certification, please go to the Compliance Center.
Product Comparison Table
 QSFP-40G-SR4-S= |  WSP-Q40GLR4L= |  QSFP-4X10G-AOC3M |  CVR-4SFP10G-QSFP= |  QSFP-H40G-AOC3M= | |
|---|---|---|---|---|---|
| Compatibility | Cisco / Juniper / Huawei / Arista | Cisco, Juniper, Huawei, Arista | N/A | Cisco, Juniper, Huawei, Arista | Cisco / Juniper / Huawei / Arista |
| Connector Type | MPO | LC | QSFP | LC | QSFP |
| Data Rate | 40G | 40G | 40G (4x10G) | 10G | 40G |
| Depth | N/A | 0.30 inches | N/A | 3.7 inches | N/A |
| Fiber Type | Multi-mode | Single-mode | Multi-mode | Multi-mode | Multi-mode |
| Form Factor | QSFP | QSFP+ | QSFP | QSFP+ | QSFP |
| Height | N/A | 0.75 inches | N/A | 0.7 inches | N/A |
| Input Voltage | 3.3V | 3.3V | N/A | 3.3V | 3.3V |
| Max Distance | 70-100 meters | 10 km | 3 m | 300 meters | 3 m |
| Network Interface | Fiber | Fiber | Ethernet | Fiber | 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 | 4.0W | 3.5W | N/A | 3.5 W | N/A |
| Product Name | QSFP-40G-SR4-S= | WSP-Q40GLR4L= | QSFP-4X10G-AOC3M | CVR-4SFP10G-QSFP= | QSFP-H40G-AOC3M= |
| 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, Fibre Channel | Ethernet | Ethernet | Ethernet |
| Transmission Distance | Short-Range | Long-Range | Short-Range | Short-Range | Short-Range |
| Wavelength | 850 nm | 1310 nm | 850 nm | 850 nm | N/A |
| Weight | N/A | 0.045 lbs | N/A | 0.3 lbs | N/A |
| Width | N/A | 0.60 inches | N/A | 2.2 inches | N/A |
Reviews & Ratings
D
Dante Royce
4
Stable multimode performance and easy installation.
C
Camilla York
5
Consistent throughput and minimal errors.
G
Grayson Duke
3
Works seamlessly with Cisco switches. Highly dependable.
L
Lydia Vaughn
4
Professional-grade transceiver for high-density environments.
Questions & Answers
What is the QSFP-40G-SR4-S= 40GBASE-SR4 QSFP transceiver module?
The QSFP-40G-SR4-S= is an enterprise-class, hot-swappable 40GBASE-SR4 quad small-form-factor pluggable (QSFP) module with an MPO connector designed for short-reach multimode fiber applications.
Which fiber type does the QSFP-40G-SR4-S= support?
It supports 850 nm 40 Gb/s transmission over OM3 and OM4 multimode fiber using a 12-fiber MPO connector.
What is the maximum link distance of the QSFP-40G-SR4-S=?
Over OM4 fiber, the module achieves up to 150 meters; over OM3 fiber, it reaches up to 100 meters at 40 Gb/s.
Is the QSFP-40G-SR4-S= hot-swappable?
Yes. The QSFP-40G-SR4-S= conforms to MSA standards, allowing hot-swap installation or removal without powering down the host system.