




Generic Compatible 100GBASE-SR4 QSFP28 850nm 100m DOM MPO8/12 MMF Optical Transceiver Module
QSFP28-103-85-01(SR4)-MPO8/12
- Broad Multi-Brand Compatibility
- Flexible Customization Support
- Tested for Reliable Performance
- Fast Response & Delivery
- Professional Technical Support
The FC-LINK QSFP28 100G 850nm 100m SR4 MPO 8/12 Transceiver is a high-performance, highly integrated 4x25G module designed to optimize reach, bandwidth, density, and cost for high port-count 100G systems and client-side 100G interfaces. Each lane supports data rates of 25Gbps, enabling transmission distances of up to 70m over OM3 fiber or 100m over OM4 fiber.Engineered for multimode fiber systems, this transceiver operates at a nominal wavelength of 850nm. It features a 38-contact edge-type electrical connector and a 8/12-fiber MPO optical interface for seamless integration into high-speed network environments.
| SPECIFICATIONS | |||
|---|---|---|---|
| Product Model | QSFP28-103-85-01(SR4)-MPO8/12 | Manufacturer brand | FC-LINK |
| Package Type | QSFP28 | Optical connector | MPO 8C/12C |
| Max Data Rate | 100Gbps | Channel Data Rate | 25.78125Gbps |
| Effective transmission distance(OM3) | 70m | Effective transmission distance(OM4) | 100m |
| Wavelength | 850nm | Operating voltage | 3.3V |
| Fiber Type | MMF | Core Size | 50/125 |
| Transmitter Type | VCSEL | Receiver Type | PIN |
| TX Power | -6~2.4dBm | Receiver Sensitivity | -5.2dBm |
| Digital Optical Monitoring(DOM) | YES | Receiver Overload | 2.4dBm |
| Power Consumption | <2.5W | Protocols | IEEE 802.3bm 100GBASE SR4 |
| Operating temperature(Commercial) | 0℃~+70℃ | Storage Temperature(Commercial) | -40℃~+85℃ |
| Operating temperature(Extended) | -20℃~+85℃ | Storage Temperature(Industrial) | -40℃~+85℃ |
| Operating temperature(Industrial) | -40℃~+85℃ | Storage Temperature(Industrial) | -40℃~+85℃ |

Server-to-Switch Data Center Links
Used for 10G/25G/100G optical uplinks between servers and top-of-rack switches in high-density data center deployments.

Building-to-Building Campus Backbone
Suitable for 1G/10G fiber links between office buildings, campus distribution rooms, and backbone aggregation points.

Access-to-Core Enterprise Uplinks
Designed for switch uplinks from access to aggregation or core layers in enterprise and campus network architectures.

Industrial Switching in Harsh Environments
Applied in industrial Ethernet, automation systems, and outdoor cabinets where wider temperature tolerance and stable fiber communication are required.
| Parameter | Symbol | Min. | Max. | Unit | |||||
| Power supply voltage | VCC | -0.5 | 3.6 | V | |||||
| Storage temperature | TC | -40 | 85 | ℃ | |||||
| Relative humidity | RH | 5 | 85 | % | |||||
| These values represent the damage threshold of the module.Stress in excess of any of the individual absolute maximum ratingscan cause immediate catastrophic damage to the module even if all other parameters are within recommended operating conditions. | |||||||||
| Recommended Operating Environment | |||||||||
| Parameter | Symbol | Min | Typical | Max | Unit | ||||
| Power supply voltage | VCC | 3.15 | 3.3 | 3.45 | V | ||||
| Operating case temperature | Tca | 0 | - | 70 | ℃ | ||||
| Tca | -20 | - | 85 | ||||||
| Tca | -40 | - | 85 | ||||||
| Recommended operating environment specifies parameters for which the electrical and optical characteristics hold unless otherwise noted. | |||||||||
| Electrical Characteristics | |||||||||
| Parameter | Symbol | Min | Typical | Max | Unit | Ref | |||
| Transmitter | |||||||||
| Input differential impedance | Rin | - | 100 | - | Ω | - | |||
| Differential input voltage swing,per lane | Vin | 300 | - | 1100 | mV | - | |||
| Input logic level high | VIH | 2 | - | VCC+0.3 | V | - | |||
| Input logic level low | VIL | Vee | - | Vee+0.8 | V | - | |||
| Receiver | |||||||||
| Output differential impedance | Rout | - | 100 | - | Ω | - | |||
| Differential output swing,per lane | Vout | 500 | - | 800 | mV | - | |||
| Output logic level high | VOH | 2 | - | VCC+0.3 | V | - | |||
| Output logic level low | VOL | 0 | - | 0.4 | V | - | |||
| Transmitter Specifications-Optical | |||||||||
| Parameter | Symbol | Min | Typical | Max | Unit | - | |||
| Signaling speed per lane | - | 25.78125±100ppm | Gb/s | - | |||||
| Center wavelength | λ | 840 | 850 | 860 | nm | - | |||
| RMS spectral width | △λ | - | - | 0.6 | nm | - | |||
| Average launch power per Lane | Po | -6 | - | 2.4 | dBm | - | |||
| Transmit OMA per Lane | OMA | -6.4 | - | 3 | dBm | - | |||
| Launch power [OMA]minus TDEC per Lane | P-TDEC | -7.3 | - | - | dBm | - | |||
| Extinction ratio | ER | 3 | - | - | dB | - | |||
| Optical return loss tolerance | ORL | - | 12 | dB | - | ||||
| Average launch power of OFF transmitter,each lane | - | - | - | -30 | dBm | - | |||
| Receiver Specifications-Optical | |||||||||
| Parameter | Symbol | Min. | Typical | Max. | Unit | - | |||
| Bit rate per channel | DR | 25.78125±100ppm | Gb/s | - | |||||
| Center wavelength | λ | 840 | 850 | 860 | nm | - | |||
| Damage threshold | DT | 3.4 | - | - | dBm | - | |||
| Average receive power,each lane | RXPOW | -10.3 | - | 2.4 | dbm | - | |||
| QSFP28 Transceiver Electrical Pad Layout |
| Pin Definition | |||||||||
| Pin | Symbol | Name/Description | |||||||
| 1 | GND | Ground | |||||||
| 2 | Tx2n | Transmitter inverted data input | |||||||
| 3 | Tx2p | Transmitter non-inverted data input | |||||||
| 4 | GND | Ground | |||||||
| 5 | Tx4n | Transmitter inverted data input | |||||||
| 6 | Tx4p | Transmitter non-inverted data input | |||||||
| 7 | GND | Ground | |||||||
| 8 | ModSelL | Module select | |||||||
| 9 | ResetL | Module reset | |||||||
| 10 | VCCRx | +3.3V power supply receiver | |||||||
| 11 | SCL | 2-wire serial interface clock | |||||||
| 12 | SDA | 2-wire serial interface data | |||||||
| 13 | GND | Ground | |||||||
| 14 | Rx3p | Receiver non-inverted data output | |||||||
| 15 | Rx3n | Receiver inverted data output | |||||||
| 16 | GND | Ground | |||||||
| 17 | Rxlp | Receiver non-inverted data output | |||||||
| 18 | Rx1n | Receiver inverted data output | |||||||
| 19 | GND | Ground | |||||||
| 20 | GND | Ground | |||||||
| 21 | Rx2n | Receiver inverted data output | |||||||
| 22 | Rx2p | Receiver non-inverted data output | |||||||
| 23 | GND | Ground | |||||||
| 24 | Rx4n | Receiver inverted data output | |||||||
| 25 | Rx4p | Receiver non-inverted data output | |||||||
| 26 | GND | Ground | |||||||
| 27 | ModPrsL | Module present | |||||||
| 28 | IntL | Interrupt | |||||||
| 29 | VCCTx | +3.3V power supply transmitter | |||||||
| 30 | VCC1 | +3.3V power Supply | |||||||
| 31 | LPMode | Low power mode | |||||||
| 32 | GND | Ground | |||||||
| 33 | Tx3p | Transmitter non-inverted data input | |||||||
| 34 | Tx3n | Transmitter inverted data input | |||||||
| 35 | GND | Ground | |||||||
| 36 | Txlp | Transmitter non-inverted dataInput | |||||||
| 37 | Tx1n | Transmitter inverted data input | |||||||
| 38 | GND | Ground | |||||||

Performance Testing
Each module is tested before shipment to help ensure stable optical and electrical performance.

Compatibility Verification
Compatibility validation is available for major switch and router platforms.

Reliability Screening
Selected products support aging, temperature cycle, and stability testing for demanding applications.

Traceable Quality Control
Inspection and production records support more consistent quality control and batch traceability.
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