100GBASE-SR4 QSFP28 Compatible Transceiver: 100G-QSFP28-100
100GBASE-SR4 QSFP28 Transceiver Overview
The 100GBASE-SR4 QSFP28 module gives data centers a short-reach 100 Gigabit Ethernet link over parallel multimode fiber. Four 25G lanes at 850 nm run across an MTP/MPO-12 ribbon, reaching 100 m on OM4 and 70 m on OM3, with DOM diagnostics on the standard QSFP28 management interface. Its 8-fiber parallel MPO design fits high-density top-of-rack and spine fabrics built on structured trunk cabling. The module is coded for recognition across multiple vendor switching and routing platforms.
- Media Type: 4 Lanes of Multi-Mode Fiber (MMF)
- Connector: MTP/MPO-12 (UPC)
- Fiber Count: 8 Fibers
- Maximum Distance: 100 m
- Average Link Budget: 1.9 dB
- Tx Wavelength: 850 nm
- Supported Data Rate: 103.125 Gbps
- DDM/DOM: Supported
- Forward Error Correction (FEC): No
- Temperature Range: Standard 0°-70°C
100GBASE-SR4 QSFP28 Pricing
SKU:100G-QSFP28-100
In Stock - Ships Next Business Day100GBASE-SR4 QSFP28 Compatible Transceiver Specification
Form Factor | QSFP28 |
Modulation | NRZ (Non-Return to Zero) |
Media Type | 4 Lanes of Multi-Mode Fiber (MMF) |
Connector | MTP/MPO-12 (UPC) |
Fiber Count | 8 Fibers |
Maximum Distance | 100 m |
Average Link Budget | 1.9 dB |
TX Wavelength | 850 nm |
RX Wavelength | 4-channel 850 nm |
Supported Data Rate | 103.125 Gbps |
Supported Ethernet Applications | 100G Ethernet (103.125 Gbps) |
DDM/DOM | Supported |
Forward Error Correction (FEC) | No |
Transmitter Type | VSCEL Laser |
Tx Wave Bandwidth | 20 nm (840-860 nm) |
Average Launch Power (Min) Each Lane | 3 dBm |
Average Launch Power (Max) Each Lane | 7.5 dBm |
Extinction Ratio (Min) | 3 dB |
Receiver Type | PIN photodiode |
RX Wave Bandwidth | 20 nm (840-860 nm) |
Average Receiver Sensitivity (Min) Each Lane | -10.3 dBm |
Average Receiver Sensitivity (Max) Each Lane | 2.4 dBm |
Receiver Overload | 3.4 dBm |
Temperature Range | Standard 0°-70°C |
Storage Temperature | -40° to 85°C |
Relative Humidity | 5 to 85% |
Power Consumption (Max) | 3.5 W |
Power | +3.3V single power supply |
Compliance | CE, RoHS, Class 1 FDA and IEC60825-1 Laser Safety Compliant, IEEE 802.3bm, 100GBASE-SR4, QSFP28 MSA, SFF-8636 (Management Interface for 4-lane modules), SFF-8665 |
100GBASE-SR4 QSFP28 Compatible Transceiver Datasheet
v3Complete technical specifications and product details
100GBASE-SR4 QSFP28 Compatible Transceiver Description
The EDGEOPTIC 100G-QSFP28-100 is a multi-vendor compatible 100GBASE-SR4 QSFP28 optical module built for 100 Gigabit Ethernet over multimode fiber. Four parallel optical lanes run at 25 Gbps each using NRZ modulation for an aggregate 103.125 Gbps for high-density data center and enterprise backbone links. The module supports 100G Ethernet only; it does not carry Fibre Channel, OTN, or SONET/SDH traffic.
All four transmit and receive channels operate at 850 nm. The transmit side uses a VCSEL array and the receive side a PIN photodiode array, the standard short-reach multimode optical path. The module provides a 1.9 dB average link budget with a receive sensitivity better than −10.3 dBm per lane. Over OM4 multimode fiber it reaches up to 100 meters, and approximately 70 meters over OM3. The optical interface is an MTP/MPO-12 (UPC) connector carrying 8 fibers, four for transmit and four for receive.
The host electrical interface conforms to the SFF-8636 and SFF-8665 management specifications, so the hot-swappable module works in standard QSFP28 host ports and can be replaced without powering down adjacent ports. It is coded for recognition across multiple vendor equipment platforms. Equipment with vendor-specific module validation may require the matching vendor EEPROM coding for the host to accept the optic.
DDM/DOM (Digital Diagnostic Monitoring) reports transmitted and received optical power, module temperature, laser bias current, and supply voltage in real time over the MSA management interface. The module runs across a 0 to 70°C commercial temperature range and draws up to 3.5 W from a single +3.3 V supply. The 100GBASE-SR4 PMD does not integrate forward error correction. Host-side RS-FEC, where applicable, is configured at the switch port and is independent of the module.
The module meets the IEEE 802.3bm Clause 95 specification for 100GBASE-SR4 and the QSFP28 MSA. It is CE and RoHS certified and Class 1 laser safe per FDA and IEC 60825-1.
Typical applications include data center top-of-rack to spine links, high-performance computing clusters, storage area networks, and enterprise backbone infrastructure. The parallel optical design fits high-density deployments where port count and power efficiency matter.
Backed by 15+ years of EdgeOptic compatibility engineering across vendor optical platforms. The 100G-QSFP28-100 ships next business day from EU stock with a lifetime warranty. For volume pricing or platform questions, contact our sales team.
Frequently Asked Questions
What MPO cable gender and polarity does a 100GBASE-SR4 QSFP28 module need?
The transceiver port is female, with no guide pins, so the patch cable needs a male (pinned) MTP/MPO connector to mate with it. For a direct transceiver-to-transceiver link, use a male-to-male MPO cable with Type B (crossover) polarity so the four transmit lanes on one end land on the four receive lanes at the other. A mismatched gender or straight-through polarity is a common cause of a dark link.
Does 100GBASE-SR4 require FEC on the switch port?
The transceiver itself does not integrate FEC. RS-FEC for 100GBASE-R is a host-side function defined in IEEE 802.3, configured at the switch port rather than in the module. Whether it is enabled depends on the switch platform and the link partner, so the same optic works on ports with RS-FEC on or off. Match the FEC setting at both ends of the link.
What is the difference between 100GBASE-SR4 and 100G BiDi SR?
100GBASE-SR4 runs over 8 multimode fibers (four transmit and four receive) on an MTP/MPO connector. 100G BiDi SR runs over a 2-fiber duplex LC pair, sending two wavelengths bidirectionally on each fiber. They use different connectors and cabling, so they are not interchangeable. Sites with existing 2-fiber duplex multimode runs need the BiDi variant, while structured MPO trunk cabling suits SR4.
What reach does 100GBASE-SR4 support over OM3, OM4, and OM5?
IEEE 802.3bm specifies 70 m over OM3 and 100 m over OM4 for 100GBASE-SR4. OM5 is backward compatible with 850 nm transmission and works at the same OM4-rated 100 m. The full OM5 wideband reach advantage applies to SWDM optics, not to SR4.
What other names is 100GBASE-SR4 QSFP28 known by?
100GBASE-SR4 QSFP28 modules are also listed as 100G-SR4, QSFP28-SR4-100G, 100GBASE-SR4-QSFP28, and QSFP28-100GBASE-SR4. All refer to the same 4-lane 850 nm short-reach 100G optic.