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What is a 100G QSFP28 Transceiver?<\/h2>\r\n
A 100G QSFP28 transceiver<\/a> is a hot-pluggable optical module designed to transmit and receive data at speeds of 100 Gigabits per second (Gbps). The term QSFP28 stands for Quad Small Form-factor Pluggable 28, which refers to the compact form factor that integrates four high-speed electrical lanes.<\/p>\r\n Compared with earlier 40G QSFP+ modules, QSFP28 delivers significantly higher bandwidth while maintaining a similar physical form factor. This allows network operators to upgrade existing infrastructure to 100G without dramatically increasing rack space or power consumption.<\/p>\r\n 100G QSFP28 transceivers are widely deployed in:<\/p>\r\n <\/p>\r\n Depending on the design and optical technology used, different QSFP28 modules support various transmission distances and fiber types, ranging from short-reach connections inside data centers to long-distance telecommunications links.<\/p>\r\n <\/p>\r\n <\/p>\r\n The compact QSFP28 form factor allows network devices to support more ports in the same physical space. This is particularly valuable in modern data centers where space and power efficiency are critical.<\/p>\r\n With support for 100 Gigabit Ethernet, QSFP28 modules enable extremely fast data transmission. This helps reduce latency and improves overall network performance.<\/p>\r\n Compared with older CFP form factors, QSFP28 modules typically consume significantly less power while delivering higher port density.<\/p>\r\n QSFP28 modules can be installed or replaced without shutting down network equipment, simplifying maintenance and reducing downtime.<\/p>\r\n Most QSFP28 modules comply with Multi-Source Agreement (MSA) standards, ensuring interoperability with networking equipment from different manufacturers.<\/p>\r\n QSFP28 transceivers provide the bandwidth, reliability, and efficiency required for high-performance computing environments and large-scale cloud infrastructure.<\/p>\r\n QSFP28 modules can support:<\/p>\r\n <\/p>\r\n <\/p>\r\n\r\n\r\n\r\n <\/p>\r\n <\/p>\r\n In this section, we will cover 100G QSFP28 transceivers and their types available for market, along with their details to help you understand their encompassing features and advantages.<\/p>\r\n <\/p>\r\n The 100G QSFP28 SR4 transceiver is a multimode optical module that works on four lanes of OM4 or OM3<\/a> fibre with a link length of up to 100 meters. It employs a 4x25G electrical interface and is commonly found in high-performance computing environments for short-reach data transmission.<\/p>\r\n The 100G QSFP28 SR4 transceiver is intended for short-reach applications, with a range of up to 100 meters on multimode fiber<\/a> with parallel optics. It is used in data centers for switch-to-switch connectivities as well as server-to-switch applications. Four bidirectional lanes are able to transmit 25 Gigabits per second on each of the fiber pairs.<\/p>\r\n <\/p>\r\n <\/p>\r\n The 100G QSFP28 PSM4<\/a> transceiver is a parallel single-mode optical module that works on four fibre lanes with a link length of up to 500 meters. It operates with four channels each transmitting at a rate of 25Gbps. It employs a 4x25G electrical interface and is suitable for intra-rack and inter-rack data center applications that necessitate higher density with lower power consumption.\u00a0<\/p>\r\n The 100G QSFP28 PSM4 transceiver is intended for extended reach applications with a single mode fiber distance of up to 2 kilometers. It is widely used in long-haul telecoms networks which LR4 cannot cover due to the distance limitations.<\/p>\r\n <\/p>\r\n 100G QSFP28 LR4<\/a> transceiver is a single-mode optical module that works on four fiber lanes with a link length of up to 10 kilometers.\u00a0 The 100G QSFP28 LR4 transceiver caters to long reach applications with a single mode fiber reach of up to 10 kilometers. It operates with four channels each transmitting at a rate of 25Gbps.<\/p>\r\n It employs a 4x25G electrical interface which is widely used in telecommunications and data center applications for long-reach data transmission. It\u2019s primarily deployed in telecoms, metro networks and data center interconnects.<\/p>\r\n <\/p>\r\n <\/p>\r\n\r\n
Key Features of 100G<\/strong> QSFP28 Transceivers<\/strong><\/h2>\r\n
High Port Density<\/strong><\/h4>\r\n
High Data Rate<\/strong><\/h4>\r\n
Low Power Consumption<\/strong><\/h4>\r\n
Hot-Pluggable Design<\/strong><\/h4>\r\n
MSA Compatibility<\/strong><\/h4>\r\n
Optimized for High-Performance Networks<\/strong><\/h4>\r\n
Support for Multiple Protocols<\/strong><\/h4>\r\n
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What are the types of 100G QSFP28 transceivers?<\/strong><\/h2>\r\n
![\""What\"](\"https:\/\/ascentoptics.com\/blog\/wp-content\/uploads\/2023\/06\/26.jpg\")
<\/strong><\/span><\/h3>\r\n\r\n\r\n\r\n\r\n\r\n100G QSFP28 SR4 Transceivers<\/strong><\/h3>\r\n
![\"100G](\"https:\/\/ascentoptics.com\/blog\/wp-content\/uploads\/2025\/06\/QSP-100M485-1HCM-1.jpg\")
100G QSFP28 PSM4 Transceivers<\/strong><\/h3>\r\n
![\"<yoastmark](\"https:\/\/ascentoptics.com\/blog\/wp-content\/uploads\/2025\/06\/QSP-100S431-5HCM-1.jpg\")
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100G QSFP28 LR4 Transceivers<\/strong><\/h3>\r\n
![\"100G](\"https:\/\/ascentoptics.com\/blog\/wp-content\/uploads\/2025\/06\/QSP-100L431-10CL-1.jpg\")
100G QSFP28 ER4 Transceivers<\/strong><\/h3>\r\n
![\"How](\"https:\/\/ascentoptics.com\/blog\/wp-content\/uploads\/2025\/06\/How-to-Choose-the-Right-100G-QSFP28-Module.png\")
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