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SRX-QSFP-40G-SR4
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40GE SR4 QSFP+ TRANSCEIVER
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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:
SRX-QSFP-40G-SR4
- Description:
- 40GE SR4 QSFP+ TRANSCEIVER
- Rating:
Added to cart 28 times recently
- Availability:
2 In stock - Ready to Ship
- Brand:
- Juniper
- GTIN:
- 0606121479253
- 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:
$5,528.00
- Price:
$3,481.0037% off
Quantity:
1
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SRX-QSFP-40G-SR4 Overview
SRX-QSFP-40G-SR4 is a high-performance QSFP transceiver designed for short-range, 40G Ethernet applications. Built with precision for data center and enterprise network deployments, this module leverages a multi-mode fiber interface with an MPO connector and an 850 nm wavelength to deliver robust, low-latency connectivity. It supports a 40G data rate through four parallel 10G lanes, making it ideal for scalable, high-density interconnects in modern telecom and network environments.
Engineered in the standard QSFP form factor, SRX-QSFP-40G-SR4 meets the demanding physical and electrical requirements for 40G optical communications. Its compact dimensions and proven reliability allow for efficient integration into dense networking systems. The module is optimized for Ethernet protocols, providing consistent performance in data centers and other high-speed networking applications while ensuring industry-standard operating and storage temperature ranges.
SRX-QSFP-40G-SR4 price is $3,481.00, a 37% saving from the Juniper list price of $5,528.00. SRX-QSFP-40G-SR4 is in stock and available for next-day dispatch. (terms applied)
Request bulk order quote for SRX-QSFP-40G-SR4 for additional pricing. Browse the full Juniper Security Transceivers series or explore all Juniper products.
SRX-QSFP-40G-SR4 Specifications
- Product Type
- Transceiver
- Brand
- Juniper
- Form Factor
- QSFP
- Data Rate
- 40G
- Connector Type
- MPO
- Wavelength
- 850 nm
- Transmission Distance
- Short-Range
- Fiber Type
- Multi-mode
- Max Distance
- 100m (OM3) / 150m (OM4)
- Supported Protocols
- Ethernet
- Network Interface
- Fiber
- Operating Temperature
- 0 to 70°C
- Storage Temperature
- -40 to 85°C
- Input Voltage
- 3.3V
- Compatibility
- Juniper, Cisco, Huawei, Arista
- Product Name
- SRX-QSFP-40G-SR4
SRX-QSFP-40G-SR4 Use Case
40G Spine-to-Leaf Data Center Uplinks
In hyperscale data centers deploying a spine-and-leaf architecture, the SRX-QSFP-40G-SR4-40GE SR4 QSFP+ TRANSCEIVER delivers 40 Gbps short-range connectivity over OM4 multimode fiber up to 100 m. Its low-latency, high-throughput links optimize traffic between leaf switches and spine nodes, simplifying cable management and reducing switch port count. Benefit: eliminates bandwidth bottlenecks, accelerates east-west traffic, and supports seamless capacity expansion.
High-Performance Computing Cluster Interconnect
Scientific research centers and financial trading firms require ultra-low-latency links for node-to-node data exchange. The SRX-QSFP-40G-SR4-40GE provides reliable 40 Gbps connectivity within HPC racks, featuring built-in digital diagnostics for proactive monitoring. Benefit: maximizes compute-to-communication efficiency, minimizes downtime, and ensures data integrity during large-scale simulations and real-time analytics.
Campus and Metro Ethernet Backbone Extension
Enterprises and service providers extend 40 G Ethernet across campus and metro fiber rings using the SRX-QSFP-40G-SR4-40GE, supporting up to 100 m short-range links over OM3/OM4 cable. Its QSFP+ form factor optimizes port density and power consumption while integrating seamlessly with existing aggregation switches. Benefit: delivers scalable broadband services, reduces OPEX, and maintains carrier-grade SLA compliance.
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Product Comparison Table 
| SRX-QSFP-40G-SR4 |  SRX-SFP-1GE-T-ET |  SRX-SFPP-10G-SR-ET |  SRX-SFPP-10G-LR |  SRX-CFP-100G-LR4 | |
|---|---|---|---|---|---|
| Product Type | Transceiver | Transceiver | Transceiver | Transceiver | Transceiver |
| Form Factor | QSFP | SFP | SFP+ | SFP+ | CFP |
| Data Rate | 40G | 1G | 10G | 10G | 100G |
| Connector Type | MPO | RJ45 | LC Duplex | LC | LC |
| Transmission Distance | Short-Range | Short-Range | Short-Range | Long-Range | Long-Range |
| Max Distance | 100m (OM3) / 150m (OM4) | 100 meters | 300 m | 10 km | 10 km |
| Supported Protocols | Ethernet | Ethernet | Ethernet | Ethernet | Ethernet |
| Network Interface | Fiber | Ethernet | Fiber | Fiber | Fiber |
| Operating Temperature | 0 to 70°C | -40 to 85°C | -40 to 85°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, Huawei, Arista | Juniper | Cisco / Juniper / Huawei / Arista | Juniper | Cisco / Juniper / Huawei / Arista |
| Product Name | SRX-QSFP-40G-SR4 | SRX-SFP-1GE-T-ET 1 Gigabit Ethernet RJ45 SFP Transceiver | SRX-SFPP-10G-SR-ET | SRX-SFPP-10G-LR | SRX-CFP-100G-LR4 |
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
A
Anthony Bell
5
Clean 40G connectivity inside our data center fabric.
J
Julian Meyer
4
Stable SR4 lanes with consistent performance.
P
Patrick O'Neil
5
Worked seamlessly with SRX firewalls.
V
Victor Lang
5
Low latency and reliable optics.
T
Thomas Reed
5
Good choice for short reach aggregation.
Questions & Answers
What is the SRX-QSFP-40G-SR4 transceiver?
The SRX-QSFP-40G-SR4 is a 40 Gigabit Ethernet short-reach QSFP+ optical module designed for high-density data center connectivity over multimode fiber.
What data rate does the 40GE SR4 QSFP+ transceiver support?
The transceiver supports a line rate of 40 Gbps, delivering four independent 10 Gbps channels in a single QSFP+ package.
What fiber type is compatible with the SRX-QSFP-40G-SR4?
The module is compatible with OM3 and OM4 multimode fiber, ensuring optimal performance up to 100 meters on OM3 and up to 150 meters on OM4.
Which connector does the SRX-QSFP-40G-SR4 use?
It uses an MPO 12-fiber connector interface, enabling parallel transmission of four lanes at 10 Gbps each.
Is the SRX-QSFP-40G-SR4 hot-swappable?
Yes. The QSFP+ form-factor supports hot-plug capability, allowing insertion or removal without powering down the host system.
What is the maximum reach of the 40GE SR4 QSFP+ transceiver?
The SR4 optics support up to 100 meters over OM3 and up to 150 meters over OM4 multimode fiber at 40 Gbps.
Does the SRX-QSFP-40G-SR4 support digital diagnostic monitoring (DDM)?
Yes. It features integrated DDM (SFF-8472) for real-time monitoring of optical power, temperature, and voltage.
What is the operating temperature range for the SRX-QSFP-40G-SR4?
The transceiver operates reliably from 0 °C to 70 °C (standard commercial range).
How much power does the 40GE SR4 QSFP+ transceiver consume?
Typical power consumption is ≤3.5 W per module, making it energy-efficient for high-density deployments.
Which network devices are compatible with SRX-QSFP-40G-SR4?
The module is interoperable with most major brands of QSFP+-enabled switches, routers, and servers that support 40 GbE SR4 optics.
What IEEE and MSA standards does the SRX-QSFP-40G-SR4 comply with?
It is compliant with IEEE 802.3ba for 40 GbE and the QSFP+ MSA, ensuring broad interoperability.
How do I install the SRX-QSFP-40G-SR4 transceiver?
Align the QSFP+ module with the port receptacle, gently insert until it clicks, and verify link status on your switch or server.
What warranty covers the SRX-QSFP-40G-SR4 transceiver?
The module includes a one-year limited warranty against defects in materials and workmanship.
Can I use the SRX-QSFP-40G-SR4 in data center environments?
Yes. Its low-power design, short-reach form factor, and DDM support make it ideal for high-density data center deployments.
How should I clean and maintain the SRX-QSFP-40G-SR4?
Use a dry, lint-free cloth or approved dry cleaning kit to clean the MPO connector; avoid liquids to maintain optical performance.