United States$5,000,000+
Inventory Delivered By
X
Xavier Halbrook
4
Reliable 40G CSR4 module for extended MMF runs. Stable performance across our data hall.
QSFP-40G-CSR4
Original Stock
Ready to Ship
QSFP 4x10GBASE-SR Transceiver Module, MPO, 300M
FEATURED DEAL
Name:
QSFP-40G-CSR4
- Description:
- QSFP 4x10GBASE-SR Transceiver Module, MPO, 300M
- Rating:
Added to cart 28 times recently
- Availability:
In stock - Ready to Ship
- Brand:
- Cisco
- GTIN:
- 821455070031
- Condition:
- Warranty:
- 3
- List Price:
$3,534.00
- Price:
$636.0082% off
Quantity:
1
Business price:
3 Year Extended Warranty
Same-day Shipping
14-Day Money Back Guarantee
Shipping:
Payment:
3 Year Extended Warranty
Same-day Shipping
14-Day Money Back Guarantee
Need Additional Discount on Product?
Request a quote below - Get Exclusive Pricing and Support.
Shipping:
Payment:
TRUSTED, TRIED, PROVEN
Officially Accredited
& Verified By
Next-Gen IT
Solutions Powered By
QSFP-40G-CSR4 Overview
QSFP-40G-CSR4 is a QSFP optical transceiver designed for high-performance 40G data transmission over fiber links. Built to support multi-protocol operation including Ethernet and Fibre Channel, this module is optimized for short-range applications in data centers, enterprise networks, and telecom environments.
QSFP-40G-CSR4 features a compact QSFP form factor with precise physical dimensions for easy integration into existing systems. It employs LC connectors and is engineered for use with multi-mode fiber to deliver up to 100 meters of reliable transmission, satisfying the stringent requirements of modern high-speed connectivity deployments.
QSFP-40G-CSR4 price is $636.00, a 82% saving from the Cisco list price of $3,534.00. QSFP-40G-CSR4 is in stock and available for next-day dispatch. (terms applied)
Request bulk order quote for QSFP-40G-CSR4 for additional pricing. Browse the full Cisco 40G Optical Modules series or explore all Cisco products.
QSFP-40G-CSR4 Specifications
- Product Type
- Transceiver
- Form Factor
- QSFP
- Data Rate
- 40G
- Connector Type
- LC
- Wavelength
- 850nm
- Transmission Distance
- Short-Range
- Fiber Type
- Multi-mode
- Max Distance
- 100 meters
- Supported Protocols
- Ethernet, Fibre Channel
- Network Interface
- Fiber
- Power Consumption
- 3.0W
- Operating Temperature
- 0 to 70°C
- Storage Temperature
- -40 to 85°C
- Input Voltage
- 3.3V
- Compatibility
- Cisco
- Product Name
- QSFP-40G-CSR4
- Height
- 0.66 inches
- Width
- 0.90 inches
- Depth
- 1.00 inches
- Weight
- 0.1 lbs
Quality Certifications
To get the detailed certification, please go to the Compliance Center.
Product Comparison Table 
| QSFP-40G-CSR4 |  QSFP-40GE-LR4-S |  QSFP-40GE-LR4 |  CVR-CFP-4SFP10G= |  QSFP-40G-CSR-S= | |
|---|---|---|---|---|---|
| Compatibility | Cisco | Cisco, Juniper, Huawei, Arista | Cisco / Juniper / Huawei / Arista | N/A | Cisco / Juniper / Huawei / Arista |
| Connector Type | LC | LC | LC | LC | LC |
| Data Rate | 40G | 40G | 40G | 10G | 40G |
| Depth | 1.00 inches | N/A | N/A | N/A | 2.85 inches |
| Fiber Type | Multi-mode | Single-mode | Single-mode | N/A | Multi-mode |
| Form Factor | QSFP | QSFP | QSFP+ | CFP | QSFP |
| Height | 0.66 inches | N/A | N/A | N/A | 0.33 inches |
| Input Voltage | 3.3V | 3.3V | 3.3V | 3.3V | 3.3V |
| Max Distance | 100 meters | 10 km | 10 km | N/A | 100 meters |
| Network Interface | Fiber | 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 | 3.0W | 5.5W | 6.0 W | N/A | 3.5W |
| Product Name | QSFP-40G-CSR4 | QSFP-40GE-LR4-S | QSFP-40GE-LR4 | CVR-CFP-4SFP10G= | QSFP-40G-CSR-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, Fibre Channel | Ethernet | Ethernet | Ethernet | Ethernet |
| Transmission Distance | Short-Range | Long-Range | Long-Range | Short-Range | Short-Range |
| Wavelength | 850nm | 1271/1294/1318/1341 nm | 1310 nm | N/A | 850nm |
| Weight | 0.1 lbs | N/A | N/A | N/A | 0.1 lbs |
| Width | 0.90 inches | N/A | N/A | N/A | 0.64 inches |
Reviews & Ratings
Y
Yale Donnington
5
Clean MPO connectivity and consistent 4x10G aggregation.
Z
Zane Carrington
5
Strong signal quality and dependable 300m reach over MMF.
A
Alden Whitlock
5
Excellent short to mid-range 40G performance with no compatibility issues.
B
Barrett Kingswell
4
Stable throughput and easy integration into our switching fabric.
C
Corbin Hathaway
5
Ideal for dense rack deployments requiring reliable 40G links.
D
Dorian Blackmoor
5
Consistent optical performance under heavy traffic conditions.
Questions & Answers
What is the maximum transmission distance of the QSFP-40G-CSR4 module?
The QSFP-40G-CSR4 supports up to 300 meters over OM3 multimode fiber using an MPO connector.
Which data rate does the QSFP-40G-CSR4 support?
The QSFP-40G-CSR4 delivers 40 Gbps aggregate throughput, splitting into four independent 10 Gbps channels.
What type of fiber cable is required for the QSFP-40G-CSR4?
The QSFP-40G-CSR4 requires OM3 or OM4 multimode fiber cables terminated with a 12-fiber MPO connector.
Is the QSFP-40G-CSR4 hot-swappable?
Yes. The QSFP-40G-CSR4 is fully hot-swappable, enabling seamless insertion and removal without powering down your switch or server.
What wavelength does the QSFP-40G-CSR4 operate on?
The QSFP-40G-CSR4 operates at a nominal laser wavelength of 850 nm for multimode fiber transmission.
Does the QSFP-40G-CSR4 support Digital Diagnostics Monitoring (DDM)?
Yes. The module supports Digital Diagnostics Monitoring for real-time parameters like temperature, supply voltage and optical power.
Which platforms are compatible with the QSFP-40G-CSR4?
The QSFP-40G-CSR4 is compatible with most major 40G network switches, routers and servers supporting IEEE 802.3ba standards.
How much power does the QSFP-40G-CSR4 consume?
The QSFP-40G-CSR4 has a typical power consumption of 2.5 W, meeting industry efficiency requirements.
Can the QSFP-40G-CSR4 be used for short-reach connections?
Yes. With support up to 300 m on OM3 fiber, the QSFP-40G-CSR4 excels in short-reach data center and enterprise links.
What form factor is the QSFP-40G-CSR4 transceiver?
The QSFP-40G-CSR4 uses the QSFP+ (Quad Small Form-Factor Pluggable Plus) form factor, offering high density in 1U/2U racks.
How do I install the QSFP-40G-CSR4 module?
To install, align the QSFP+ module with the port cage, gently push until it clicks, then connect the MPO fiber cable.
Is the QSFP-40G-CSR4 RoHS compliant?
Yes. The QSFP-40G-CSR4 is fully RoHS compliant, ensuring it meets global environmental and safety regulations.
What operating temperature range does the QSFP-40G-CSR4 support?
The QSFP-40G-CSR4 operates reliably between 0 °C and 70 °C ambient temperature.
Can the QSFP-40G-CSR4 be used with breakout cables?
Yes. The QSFP-40G-CSR4 supports 1×100 G to 4×25 G and 1×40 G to 4×10 G breakout configurations with appropriate cables.
What is the warranty period for the QSFP-40G-CSR4?
The QSFP-40G-CSR4 is backed by a standard one-year warranty, covering manufacturing defects and early failures.
How do I check the QSFP-40G-CSR4 diagnostic information?
Use your switch’s CLI or SNMP interface to poll SFF-8472 registers and retrieve real-time diagnostics for the QSFP-40G-CSR4.
Does the QSFP-40G-CSR4 support link aggregation?
Link aggregation is a function of the switch, not the module. The QSFP-40G-CSR4 supports aggregation when used in compatible switches.