ST-40G-QSFP-SR4
Sate Optics ST-40G-QSFP-SR4 is a 40Gbps QSFP+ SR4 compatible optical transceiver designed for short-distance, high-density data center and enterprise network applications.
This 40G QSFP+ SR4 optical module uses four-channel 850nm VCSEL technology to provide 40Gbps transmission over parallel multimode fiber (MMF). It supports up to 100m transmission over OM3 fiber and 150m over OM4 fiber through an MTP/MPO connector.
The ST-40G-QSFP-SR4 compatible transceiver is widely used for switch-to-switch, server-to-switch, and data center interconnect applications requiring reliable high-speed Ethernet connectivity.
More in 40G QSFP+ Transceivers
| Part Number | Model No. | Picture | Data Rate(Mbps) | Wavelength | Media Type | Reach | TX Power(dBm) | RX Sens.(dBm) | Temp.(℃) | Note | Datasheet |
|---|---|---|---|---|---|---|---|---|---|---|---|
| ST-40G-QSFP-SR4 | 40G QSFP+ SR4 Compatible | ![]() |
40Gbps | 850m | Multi Mode Fiber (MMF) | 100m (OM3) / 150m (OM4) | -6 ~ +2.4 dBm | -11.1 dBm | 0~70℃ | Compatible 40G QSFP+ SR4 Optical Transceiver | |
| ST-40G-QSFP-SR4-I | 40G QSFP+ SR4 Industrial Compatible | ![]() |
40Gbps | 850nm | Multi Mode Fiber (MMF) | 100m (OM3) / 150m (OM4) | -6 ~ +2.4 dBm | -11.1 dBm | -40~85℃ | Compatible 40G QSFP+ SR4 Industrial Optical Transceiver | |
| ST-40G-QSFP-SR-BD | 40G QSFP+ SR-BD Compatible | ![]() |
40Gbps | 850nm / 900nm | Multi Mode Fiber (MMF) | 100m (OM3) / 150m (OM4) | -4.0 ~ +5 dBm | -7.7 dBm | 0~70℃ | Compatible 40G QSFP+ SR-BD Optical Transceiver | |
| ST-40G-QSFP-PLR4-1.4 | 40G QSFP+ PLR4 1.4km Compatible | ![]() |
40Gbps | 1310nm | Single Mode Fiber (SMF) | 1.4km | -5.5 ~ +2.3 dBm | -11.5 dBm | 0~70℃ | Compatible 40G QSFP+ PLR4 Optical Transceiver | |
| ST-40G-QSFP-PLR4 | 40G QSFP+ PLR4 Compatible | ![]() |
40Gbps | 1310nm | Single Mode Fiber (SMF) | 2km | -5.5 ~ +2.3 dBm | -11.5 dBm | 0~70℃ | Compatible 40G QSFP+ PLR4 Optical Transceiver | |
| ST-40G-QSFP-PLR4-10 | 40G QSFP+ PLR4 10km Compatible | ![]() |
40Gbps | 1310nm | Single Mode Fiber (SMF) | 10km | -5.5 ~ +2.3 dBm | -11.5 dBm | 0~70℃ | Compatible 40G QSFP+ PLR4 Optical Transceiver | |
| ST-40G-QSFP-LR4 | 40G QSFP+ LR4 Compatible | ![]() |
40Gbps | 1310nm | Single Mode Fiber (SMF) | 10km | -7 ~ +2.3 dBm | -11.5 dBm | 0~70℃ | Compatible 40G QSFP+ LR4 Optical Transceiver | |
| ST-40G-QSFP-LR4-I | 40G QSFP+ LR4 Industrial Compatible | ![]() |
40Gbps | 1310nm | Single Mode Fiber (SMF) | 10km | -7 ~ +2.3 dBm | -11.5 dBm | -40~85℃ | Compatible 40G QSFP+ LR4 Industrial Optical Transceiver | |
| ST-40G-QSFP-LR4-20 | 40G QSFP+ LR4 20km Compatible | ![]() |
40Gbps | 1310nm | Single Mode Fiber (SMF) | 20km | -4.5 ~ +2.3 dBm | -12.5 dBm | 0~70℃ | Compatible 40G QSFP+ LR4 20km Optical Transceiver | |
| ST-40G-QSFP-ER4L | 40G QSFP+ ER4L Compatible | ![]() |
40Gbps | 1310nm | Single Mode Fiber (SMF) | 30km / up to 40km | -2.7 ~ +4.5 dBm | -19 dBm | 0~70℃ | Compatible 40G QSFP+ ER4L Optical Transceiver | |
| ST-40G-QSFP-ER4 | 40G QSFP+ ER4 Compatible | ![]() |
40Gbps | 1310nm | Single Mode Fiber (SMF) | 40km | -2.7 ~ +4.5 dBm | -21.2 dBm | 0~70℃ | Compatible 40G QSFP+ ER4 Optical Transceiver | |
| ST-40G-QSFP-ZR4L | 40G QSFP+ ZR4L Compatible | ![]() |
40Gbps | 1310nm | Single Mode Fiber (SMF) | 60km | +3 ~ +7 dBm | -23 dBm | 0~70℃ | Compatible 40G QSFP+ ZR4L Optical Transceiver | |
| ST-40G-QSFP-ZR4 | 40G QSFP+ ZR4 Compatible | ![]() |
40Gbps | 1310nm | Single Mode Fiber (SMF) | 80km | +4 ~ +7 dBm | -24 dBm | 0~70℃ | Compatible 40G QSFP+ ZR4 Optical Transceiver | |
| ST-40G-QSFP-EZR4 | 40G QSFP+ EZR4 DWDM 80km Compatible | ![]() |
40Gbps | 1550nm DWDM | Single Mode Fiber (SMF) | 80km | -1 ~ +4 dBm | -25 dBm | 0~70℃ | Compatible 40G QSFP+ EZR4 80km DWDM Optical Transceiver | |
| ST-40G-QSFP-ZR4+ | 40G QSFP+ ZR4+ DWDM 100km Compatible | ![]() |
40Gbps | 1550nm DWDM | Single Mode Fiber (SMF) | 100km | +1 ~ +5 dBm | -25 dBm | 0~70℃ | Compatible 40G QSFP+ ZR4+ DWDM Optical Transceiver |














