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40G LR4 QSFP performed reliably on SRX platform.
SRX-QSFP-40G-LR4
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40GE QSFP+ OPTICAL TRANSCEIVER
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Name:
SRX-QSFP-40G-LR4
- Description:
- 40GE QSFP+ OPTICAL TRANSCEIVER
- Rating:
Added to cart 28 times recently
- Availability:
In stock - Ready to Ship
- Brand:
- Juniper
- GTIN:
- 6091245547645
- Condition:
- Warranty:
- 3
- List Price:
$6,593.00
- Price:
$4,152.0037% off
Quantity:
1
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SRX-QSFP-40G-LR4 Overview
SRX-QSFP-40G-LR4 is a QSFP transceiver designed for 40G data transmission over long-range distances using LC connectors and single-mode fiber. It supports Ethernet protocols and is built in a compact form factor, making it ideal for high-performance data centers, enterprise networks, and telecommunications environments.
Engineered with a 1310nm wavelength laser, the SRX-QSFP-40G-LR4 module achieves a maximum transmission distance of up to 10km while maintaining low power consumption and precise physical dimensions. Its robust design and compatibility with leading network platforms ensure reliable long-range connectivity in modern high-speed networking applications.
SRX-QSFP-40G-LR4 price is $4,152.00, a 37% saving from the Juniper list price of $6,593.00. SRX-QSFP-40G-LR4 is in stock and available for next-day dispatch. (terms applied)
Request bulk order quote for SRX-QSFP-40G-LR4 for additional pricing. Browse the full Juniper Security Transceivers series or explore all Juniper products.
SRX-QSFP-40G-LR4 Specifications
- Product Type
- Transceiver
- Form Factor
- QSFP
- Data Rate
- 40G
- Connector Type
- LC
- Wavelength
- 1310nm
- Transmission Distance
- Long-Range
- Fiber Type
- Single-mode
- Max Distance
- 10km
- Supported Protocols
- Ethernet
- Network Interface
- Ethernet
- Power Consumption
- 4.0W
- Operating Temperature
- 0 to 70°C
- Storage Temperature
- -40 to 85°C
- Input Voltage
- 3.3V
- Compatibility
- Juniper
- Product Name
- SRX-QSFP-40G-LR4
- Height
- 0.39 inches
- Width
- 0.78 inches
- Depth
- 1.42 inches
- Weight
- 0.1 lbs
SRX-QSFP-40G-LR4 Use Case
High-Density Data Center Inter-Rack 40G Connectivity
Cloud and enterprise data centers deploy the SRX-QSFP-40G-LR4-40GE QSFP+ transceiver to link spine and leaf switches across server pods up to 10 km apart over single-mode fiber. This module delivers IEEE 802.3ba-compliant 40 Gb/s throughput with low power (≤ 3.5 W) and compact QSFP+ form factor, enabling scalable east-west traffic, reduced latency, and optimized rack density for seamless VM migrations and microservice architectures.
Metro Ethernet 40G Aggregation for Service Providers
Telecom carriers integrate the SRX-QSFP-40G-LR4-40GE QSFP+ transceiver into metro aggregation rings to carry 40 Gb/s traffic between central offices over distances up to 10 km. By leveraging 4×10 Gb/s WDM channels, this LR4 module ensures robust link redundancy and cost-effective bandwidth scaling, delivers carrier-grade signal integrity, and simplifies network expansion without fiber re-cabling or chassis upgrades.
High-Performance Computing Cluster Backbone
Research institutions and financial firms use the SRX-QSFP-40G-LR4-40GE QSFP+ transceiver for backbone links in GPU/CPU-intensive clusters spanning campus or multi-building environments. Supporting low-latency 40 Gb/s transmission and up to 10 km reach, this LR4 module guarantees deterministic packet delivery and high spectral efficiency, accelerating parallel simulations, AI training jobs, and real-time analytics with minimal jitter and maximum throughput.
Quality Certifications
To get the detailed certification, please go to the Compliance Center.
Product Comparison Table 
| SRX-QSFP-40G-LR4 |  SRX-CFP-100G-LR4 |  SRX-SFP-10GE-LRM |  SRX-SFP-10GE-DAC-3M |  SRX-SFPP-10G-LR | |
|---|---|---|---|---|---|
| Product Type | Transceiver | Transceiver | Transceiver | Transceiver | Transceiver |
| Form Factor | QSFP | CFP | SFP+ | SFP+ | SFP+ |
| Data Rate | 40G | 100G | 10G | 10G | 10G |
| Connector Type | LC | LC | LC | N/A | LC |
| Wavelength | 1310nm | 1310 nm | 1310 nm | N/A | 1310 nm |
| Transmission Distance | Long-Range | Long-Range | Short-Range | Short-Range | Long-Range |
| Fiber Type | Single-mode | Single-mode | Multi-mode | N/A | Single-mode |
| Max Distance | 10km | 10 km | 220 m | 3 meters | 10 km |
| Supported Protocols | Ethernet | Ethernet | Ethernet | Ethernet | Ethernet |
| Network Interface | Ethernet | Fiber | Ethernet | Ethernet | Fiber |
| Power Consumption | 4.0W | 5.0 W | 2.5W | N/A | 1.5 W |
| 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 |
| Compatibility | Juniper | Cisco / Juniper / Huawei / Arista | Cisco / Juniper / Huawei / Arista | Juniper | Juniper |
| Product Name | SRX-QSFP-40G-LR4 | SRX-CFP-100G-LR4 | SRX-SFP-10GE-LRM | SRX-SFP-10GE-DAC-3M | SRX-SFPP-10G-LR |
| Height | 0.39 inches | 1.0 inches | 0.22 in | N/A | 0.66 inches |
| Width | 0.78 inches | 4.5 inches | 0.56 in | N/A | 0.98 inches |
| Depth | 1.42 inches | 4.0 inches | 1.65 in | N/A | 1.20 inches |
| Weight | 0.1 lbs | 0.5 lbs | 0.04 lbs | N/A | 0.12 lbs |
Reviews & Ratings
E
Edward Hollins
5
Stable long reach firewall interconnects.
S
Simon Redgrave
4
Good optical stability.
J
Julian Forster
5
Easy integration.
V
Victor Langdon
4
Met design goals.
Questions & Answers
What is the SRX-QSFP-40G-LR4 transceiver?
The SRX-QSFP-40G-LR4 is a 40 GbE QSFP+ optical transceiver that supports up to 10 km over single-mode fiber, offering high-density, low-power 40 Gigabit Ethernet connectivity.
Which devices are compatible with SRX-QSFP-40G-LR4?
SRX-QSFP-40G-LR4 is fully compliant with the QSFP+ MSA and works with major OEM switches and routers from Cisco, Juniper, Arista, HP and other 40 GbE platforms.
What transmission distance does SRX-QSFP-40G-LR4 support?
This transceiver supports optical links up to 10 km over single-mode fiber (SMF) using LC duplex connectors.
What wavelength does the SRX-QSFP-40G-LR4 use?
The SRX-QSFP-40G-LR4 uses four separate 1310 nm LAN-WDM wavelengths to deliver aggregated 40 Gbps throughput.