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StarTech QSFP40SR4ST 850nm SFP+ Transceiver
- Data Rate: 40Gb/s
- Form Factor: QSFP+ (Quad Small Form-Factor Pluggable Plus)
- Interface: 40GBASE-SR4 Ethernet
- Wavelength: 850nm
- Fiber Type: Multimode Fiber (MMF)
- Maximum Reach: 100 meters (for OM3 MMF)
- Connector Type: MPO/MTP (typically 12-fiber connector)
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Product Overview
The StarTech QSFP40SR4ST is a 40Gb/s QSFP+ transceiver module designed for short-reach applications. It operates at a wavelength of 850nm and is intended for use with multimode fiber (MMF). This transceiver enables high-speed data transmission within data centers.
Technical Information
| Product Type | Transceiver Module |
| Brand | StarTech |
| Model | QSFP40SR4ST |
| Data Rate | 40Gb/s |
| Form Factor | QSFP+ |
Additional Specifications
| Fiber Type | Multimode Fiber (MMF) |
| Reach | 100 meters (OM3) |
| Wavelength | 850nm |
| Connector | MPO/MTP |
Product Description
The StarTech QSFP40SR4ST is a QSFP+ (Quad Small Form-Factor Pluggable Plus) optical transceiver module specifically designed for high-density, short-reach 40 Gigabit Ethernet (40GbE) applications. The 'SR4' designation indicates that it operates according to the 40GBASE-SR4 standard, which utilizes four parallel lanes of 10Gbps optical signals transmitted over multimode fiber (MMF). This parallel optics approach allows for the aggregate 40Gbps data rate. This transceiver operates at a wavelength of 850nm, which is typical for short-reach multimode fiber applications. It is designed to achieve distances of up to 100 meters over OM3 multimode fiber, and potentially further over OM4 or OM5 fiber. This makes it an ideal choice for high-speed interconnects within data centers, such as connecting top-of-rack switches to end-of-row switches, or for server-to-switch connections where short cable runs are sufficient. The QSFP40SR4ST typically uses an MPO (Multi-fiber Push On) or MTP connector, which is a compact connector capable of housing multiple fiber strands (usually 12 fibers for SR4 applications). This allows for the parallel transmission of the four optical lanes. As a QSFP+ module, it is hot-swappable, enabling easy installation and maintenance without network downtime. StarTech provides this module as a cost-effective solution for building high-bandwidth data center networks.