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Stable 40GBASE-LR4 performance over 10km SMF. Reliable enterprise-grade optics.
QSFP-40G-LR4-S=
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QSFP 40GBASE-LR4 TRNSCVR MOD LC 10KM ENTERPRISE CLASS
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Name:
QSFP-40G-LR4-S=
- Description:
- QSFP 40GBASE-LR4 TRNSCVR MOD LC 10KM ENTERPRISE CLASS
- Rating:
Added to cart 28 times recently
- Availability:
In stock - Ready to Ship
- Brand:
- Cisco
- GTIN:
- 714752586605
- Condition:
- Warranty:
- 3
- List Price:
$12,860.00
- Price:
$713.0094.5% off
Quantity:
1
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QSFP-40G-LR4-S= Overview
QSFP-40G-LR4-S= is a high-performance QSFP transceiver engineered for 40G Ethernet connectivity, offering long-range transmission capabilities over single-mode fiber. It features LC connectors, supports Ethernet protocols, and is designed in a compact form factor ideal for integration into data centers, enterprise networks, and telecom environments.
QSFP-40G-LR4-S= delivers robust 40G data rates with long‐reach performance—up to 10 km over single-mode fiber—making it a reliable solution for high-speed network interconnects. Its engineering meets stringent operational standards with compatibility across leading vendor platforms, ensuring seamless deployment in mission-critical applications.
QSFP-40G-LR4-S= price is $713.00, a 94.5% saving from the Cisco list price of $12,860.00. QSFP-40G-LR4-S= is in stock and available for next-day dispatch. (terms applied)
Request bulk order quote for QSFP-40G-LR4-S= for additional pricing. Browse the full Cisco 40G Optical Modules series or explore all Cisco products.
QSFP-40G-LR4-S= Specifications
- Product Type
- Transceiver
- Form Factor
- QSFP
- Data Rate
- 40G
- Connector Type
- LC
- Wavelength
- 1310 nm
- Transmission Distance
- Long-Range
- Fiber Type
- Single-mode
- Max Distance
- 10 km
- Supported Protocols
- Ethernet
- Network Interface
- Ethernet
- Power Consumption
- N/A
- 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-LR4-S=
- Height
- N/A
- Width
- N/A
- Depth
- N/A
- Weight
- N/A
Quality Certifications
To get the detailed certification, please go to the Compliance Center.
Product Comparison Table 
| QSFP-40G-LR4-S= |  CVR-CFP-4SFP10G= |  QSFP-40G-BD-RX= |  CFP-40G-FR= |  CFP-40G-SR4= | |
|---|---|---|---|---|---|
| Compatibility | Cisco / Juniper / Huawei / Arista | N/A | Cisco / Juniper / Huawei / Arista | Cisco, Juniper, Huawei, Arista | Cisco, Juniper, Huawei, Arista |
| Connector Type | LC | LC | LC | LC | LC |
| Data Rate | 40G | 10G | 40G | 40G | 40G |
| Depth | N/A | N/A | N/A | 7.5 inches | N/A |
| Fiber Type | Single-mode | N/A | Multi-mode | Single-mode | Multi-mode |
| Form Factor | QSFP | CFP | QSFP | CFP | CFP |
| Height | N/A | N/A | N/A | 1.2 inches | N/A |
| Input Voltage | 3.3V | 3.3V | 3.3V | 3.3V | 3.3V |
| Max Distance | 10 km | N/A | 100 meters | 10 km | 100 m |
| Network Interface | Ethernet | Ethernet | Fiber | 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 | N/A | N/A | N/A | 6.0W | 6.5W |
| Product Name | QSFP-40G-LR4-S= | CVR-CFP-4SFP10G= | QSFP-40G-BD-RX= | CFP-40G-FR= | CFP-40G-SR4= |
| 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, Fibre Channel | Ethernet |
| Transmission Distance | Long-Range | Short-Range | Short-Range | Long-Range | Short-Range |
| Wavelength | 1310 nm | N/A | 850nm | 1310nm | 850 nm |
| Weight | N/A | N/A | N/A | 1.5 lbs | N/A |
| Width | N/A | N/A | N/A | 4.4 inches | N/A |
Reviews & Ratings
B
Blake Turner
5
Consistent long-range throughput with clean LC connectivity.
C
Calvin Price
5
Smooth integration into our core switching layer.
D
Damon Brooks
4
Maintained dependable signal levels across extended fiber runs.
E
Elliot King
5
High quality 40G transceiver for backbone upgrades.
F
Frank Reed
5
Reliable long-haul connectivity with predictable latency.
G
Grant Hayes
5
Excellent enterprise-class optical performance.
Questions & Answers
What is the QSFP-40G-LR4-S= transceiver module?
The QSFP-40G-LR4-S= is a 40GBASE-LR4 QSFP+ transceiver module designed for single-mode fiber links up to 10 km, featuring LC duplex connectors and enterprise-class reliability.
Which fiber type does the QSFP 40GBASE-LR4 use?
The QSFP 40GBASE-LR4 uses single-mode fiber (SMF) with LC duplex connectors to achieve 40 Gbps transmission over distances up to 10 km.
What is the maximum reach of the QSFP-40G-LR4-S=?
The QSFP-40G-LR4-S= supports a maximum link distance of 10 kilometers over single-mode fiber, ensuring reliable long-reach connectivity.
What wavelength does the 40GBASE-LR4 transceiver operate at?
The 40GBASE-LR4 transceiver operates over four wavelengths around 1310 nm, using coarse wavelength division multiplexing (CWDM) to deliver 40 Gbps.