United States
Trusted by the Highest-Stakes Buyers
Federal agencies and Fortune 500 operations source through ORM Systems.
US Government & Defense
Enterprise Clients
QSFP-40G-CSR4
Original Stock
Ready to Ship
QSFP 4x10GBASE-SR Transceiver Module, MPO, 300M
FEATURED DEAL
Featured Deal
Hand-picked by our procurement team for standout value. This unit is offered at our sharpest price on current stock, verified against live market rates.
Name:
QSFP-40G-CSR4
- Description:
- QSFP 4x10GBASE-SR Transceiver Module, MPO, 300M
- Rating:
Added to cart 28 times recently
- Availability:
2 In stock - Ready to Ship
- Brand:
- Cisco
- GTIN:
- 0821455070031
- Condition:
Certified Refurbished
Professionally inspected, bench-tested, and firmware-verified, with configurations wiped. Restored to full working order and backed by our warranty.
- Warranty:
- 3
- List Price:
$3,534.00
- Price:
$636.0082% off
Quantity:
1
100% Genuine Guaranteed
Global Delivery
Business Terms / PO Accepted
3 Year Extended Warranty
Same-day Shipping
30-Day Money Back Guarantee
Shipping:
Payment:
3 Year Extended Warranty
Same-day Shipping
30-Day Money Back Guarantee
Need Additional Discount on Product?
Request a quote below - Get Exclusive Pricing and Support.
Shipping:
Payment:
Built Global. Stocked Local.
Regional teams and 25+ distribution partners keep stock near you and accountability in your time zone.
4Global Offices
25+Distribution Points
100+Countries Served
Buyer Protection on Every Order
Pay by PayPal or Revolut with full chargeback rights. Order on PO terms, Net-30 for government.
Verified By Federal Bodies
Every registration we claim is public record — check our federal contractor status yourself before you spend a dollar.
- RegisteredCAGE CODE: 97UU8
- VerifiedD-U-N-S® #: 118879150
- ListedUEI: VFVEQ7Q9LH31
Since 2016, Enterprise-Trusted
Ten years serving buyers who audit their vendors. From federal agencies to 20,000+ enterprise clients worldwide.
10+Years Operating
20,000+Clients Served
150K+SKUs Available
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
- Brand
- Cisco
- 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
Speak To a Hardware Specialist in Your Region
Mon–Fri: [09:00-16:00]
Avg. response under 30 mins
Product Comparison Table 
| QSFP-40G-CSR4 |  QSFP-40GE-LR4-S |  QSFP-40GE-LR4 |  CVR-CFP-4SFP10G |  QSFP-40G-CSR-S | |
|---|---|---|---|---|---|
| Product Type | Transceiver | Transceiver | Transceiver | Transceiver | Transceiver |
| Form Factor | QSFP | QSFP | QSFP+ | CFP | QSFP |
| Data Rate | 40G | 40G | 40G | 10G | 40G |
| Connector Type | LC | LC | LC | LC | LC |
| Transmission Distance | Short-Range | Long-Range | Long-Range | Short-Range | Short-Range |
| Supported Protocols | Ethernet, Fibre Channel | Ethernet | Ethernet | Ethernet | Ethernet |
| 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 |
| Storage Temperature | -40 to 85°C | -40 to 85°C | -40 to 85°C | -40 to 85°C | -40 to 85°C |
| Input Voltage | 3.3V | 3.3V | 3.3V | 3.3V | 3.3V |
| Product Name | QSFP-40G-CSR4 | QSFP-40GE-LR4-S | QSFP-40GE-LR4 | CVR-CFP-4SFP10G | QSFP-40G-CSR-S |
Compliance & Warranty
100% Genuine Product Guarantee
Every unit is authentic, sourced through trusted and authorised channels, and serial-verified on request. Genuine networking and IT hardware, guaranteed, or your money back.
Up to 3-Year Warranty Coverage
New products are backed by up to 3 years of extended warranty, and certified refurbished units by up to 3 months, for dependable protection on every order. Coverage is clear, honoured in full, and confirmed on each product page.
Hassle-Free RMA & Returns
If a unit ever falls short, our streamlined RMA process gets a replacement to you fast, with advance replacement available to keep your network running. No jargon, no runaround.
Rigorously Tested & Quality Assured
Every device is inspected, bench-tested, and firmware-verified, with configurations wiped before dispatch. Additional testing can be arranged to confirm full working condition on request.
Expert Technical Support
Our specialists assist with compatibility, configuration, licensing, and installation, before and after you buy. Real hardware expertise, whenever you need it.
Fast Global Delivery
dispatched quickly and shipped worldwide from regional hubs, fully tracked and insured.
Reviews & Ratings
X
Xavier Halbrook
4
Reliable 40G CSR4 module for extended MMF runs. Stable performance across our data hall.
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.