Name: QSFP40LR4ST StarTech 40Gbps QSFP+ LR4 10km Single-Mode Fiber Transceiver
Brand: StarTech
SKU: QSFP40LR4ST
Price: 240.00 USD
Availability: InStock
Rating: 4.8 (119 reviews)

Product Overview
The StarTech QSFP40LR4ST module delivers 40 Gigabit Ethernet connectivity over single-mode fiber, designed to handle long-distance transmissions up to 10 kilometers. It fits QSFP+ slots and is widely used in data centers and enterprise networks to link switches and routers, providing a reliable optical connection without complicated setup.

General Information
Brand	StarTech
Part Number	QSFP40LR4ST

Technical Information
Form Factor	QSFP+
Media	SMF
Type	4 x LAN WDM EML
Power Consumption	3.5 W (typical)
Protocols	40GBASE-LR4, IEEE 802.3ba
Connector	LC Duplex
DOM Support	Yes

Physical Characteristics
Weight	5.00
Condition	Refurbished

Product Description
The QSFP40LR4ST is a 40 Gigabit QSFP+ fiber transceiver module designed to facilitate fast and reliable data communication over long distances. It is commonly used in data centers, enterprise networks, and high-performance computing environments where high bandwidth and low latency connections are essential. Built for network administrators and IT professionals, this transceiver module fits into QSFP+ ports and enables the transmission of data over 10 kilometers of single-mode fiber. It is often found in switches, routers, and servers that require reliable and high-capacity optical connections. Key Features Supports 40Gbps data rates following IEEE 802.3ba standards Designed for single-mode fiber with a reach of up to 10 km Compliant with MSA and LR4 specifications ensuring broad compatibility Equipped with an LC duplex connector for easy fiber termination Hot-pluggable QSFP+ form factor for straightforward upgrades This transceiver is typically deployed in large-scale network infrastructures where maintaining high-speed, long-distance connectivity is critical. It plays a key role in supporting data flow between core networking devices, helping to ensure smooth and efficient operation of modern communication systems.

Use Cases
The StarTech QSFP40LR4ST fiber transceiver is primarily deployed in high-throughput networking environments where long-distance, low-latency optical connections are essential. This module is ideal for enterprise IT infrastructures, data centers, and service providers that require reliable 40Gbps links over single-mode fiber spanning up to 10 kilometers. How It's Used: Connecting core switches and routers in large-scale data center environments to support high bandwidth workloads. Extending network segments between campus buildings or remote office locations with single-mode fiber infrastructure. Integrating storage area networks (SANs) that demand fast, low-latency communication across rack deployments. Linking aggregation switches in enterprise networks to enable efficient virtualization and cloud computing traffic. Supporting telecom and service provider backbone networks requiring standardized, interoperable 40Gbps transceivers. By enabling seamless integration of long-distance, high-speed optical links, this transceiver supports scalability and operational efficiency in demanding network environments. It facilitates data flow continuity without compromising latency or throughput, essential for maintaining performance in evolving IT infrastructures.

QSFP40LR4ST StarTech 40Gbps QSFP+ LR4 10km Single-Mode Fiber Transceiver

Product Overview

General Information

Technical Information

Physical Characteristics

Product Description

Use Cases