40G QSFP+ ESR4 Transceiver for 400m MMF Links, 850nm MPO8/12
QSFP+40-85-04(ESR4)-MPO8/12
- Broad Multi-Brand Compatibility
- Flexible Customization Support
- Tested for Reliable Performance
- Fast Response & Delivery
- Professional Technical Support
The FC-LINK QSFP+ 40G 850nm 400m ESR4 MPO 8/12 transceiver is designed for 40GBASE Ethernet applications, supporting transmission up to 400m over multimode fiber (MMF) at an 850nm wavelength through an MTP/MPO-12 connector. It complies with QSFP+ MSA, IEEE 802.3ba 40GBASE-SR4, and IEEE 802.3ae 10GBASE-SR standards. Equipped with digital diagnostics accessible via the I2C interface, it provides real-time monitoring of operating parameters. With its hot-swappable and easy-to-install design, this transceiver is ideal for data centers, high-performance computing networks, and enterprise core and distribution layers.
| SPECIFICATIONS | |||
|---|---|---|---|
| Product Model | QSFP+40-85-04(ESR4)-MPO8/12 | Manufacturer Brand | FC-LINK |
| Package Type | QSFP+ | Optical Connector | MPO 8C/12C |
| Max Data Rate | 40G | Channel Data Rate | 10.3125Gbps |
| Effective Transmission Distance(OM3) | 300m | Effective Transmission Distance(OM4) | 400m |
| Wavelength | 850nm | Operating Voltage | 3.3V |
| Fiber Type | MMF | Core Size | 50/125µm |
| Transmitter Type | VCSEL | Receiver Type | PIN |
| TX Power | -7.6~2.4dbm | Receiver Sensitivity | -9.5dbm |
| Digital Diagnostic Monitoring(DDM) | YES | Receiver Overload | 2.4dBm |
| Power Consumption | < 1.5W | Protocols | IEEE 802.3ba IEEE 802.3ae QSFP+ MSA SFF-8436 |
| Operating temperature(Commercial) | 0℃~+70℃ | Storage Temperature(Commercial) | -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.
Compatible Brands
Customization Options
Vendor Coding
Private Label
Custom Part Number
Packaging Design
Temperature Grade Selection
| Absolute Maximum Ratings | |||||||||
| Parameter | Symbol | Min. | Max. | Unit | |||||
| Storage Temperature | TS | -40 | +85 | °C | |||||
| Supply Voltage | VCC | -0.5 | 3.6 | V | |||||
| Operating Relative Humidity | RH | 0 | 85 | % | |||||
| *Exceeding any one of these values may destroy the device immediately. | |||||||||
| Recommended Operating Conditions | |||||||||
| Parameter | Symbol | Min. | Typical | Max. | Unit | ||||
| Operating Case Temperature | Tc | QSFP+40-85-04(ESR4)-MPO8/12 | 0 | - | +70 | °C | |||
| Power Supply Voltage | Vcc | 3.135 | 3.3 | 3.465 | V | ||||
| Power Supply Current | Icc | - | - | 450 | mA | ||||
| Lane Bit Rate | BRLANE | - | 10.3125 | - | Gbps | ||||
| Optical and Electrical Characteristics | |||||||||
| Parameter | Symbol | Min. | Typical | Max. | Unit | ||||
| OM3 MMF | L | 0.5 | - | 300 | m | ||||
| Per Lane Bit Rate | BRLANE | - | 10.3125 | - | Gbps | ||||
| Transmitter | |||||||||
| Center Wavelength | λC | 840 | 850 | 860 | nm | ||||
| RMS Spectral Width | RMS | - | - | 0.65 | nm | ||||
| Average Launch Power, Each Lane | Pout/lane | -7.6 | - | 2.4 | dBm | ||||
| Extinction Ratio | ER | 3 | - | - | dB | ||||
| Average Launch Power of OFF, Each Lane | - | - | - | -30 | dBm | ||||
| Output Optical Eye | IEEE 802.3ba-2010 Compliant | ||||||||
| Receiver | |||||||||
| Center Wavelength | λC | 840 | 850 | 860 | nm | ||||
| Damage Threshold | - | 3.4 | - | - | dB | ||||
| Receiver Sensitivity In Each Lane |
Pmin | - | - | -9.5 | dBm | ||||
| LOS De-Assert, OMA | LOSD | - | - | -12 | dBm | ||||
| LOS Assert | LOSA | -30 | - | - | dBm | ||||
| LOS Hysteresis | - | 0.5 | - | - | dB | ||||
| QSFP+ Transceiver Electrical Pad Layout |
| Pin Arrangement And Definition | |||||||||
| Pin | Logic | Symbol | Description | Plug Sequence | Notes | ||||
| 1 | - | GND | Ground | 1 | 1 | ||||
| 2 | CML-I | Tx2n | Transmitter Inverted Data Input | 3 | - | ||||
| 3 | CML-I | Tx2p | Transmitter Non-Inverted Data Input | 3 | - | ||||
| 4 | - | GND | Ground | 1 | 1 | ||||
| 5 | CML-I | Tx4n | Transmitter Inverted Data Input | 3 | - | ||||
| 6 | CML-I | Tx4p | Transmitter Non-Inverted Data Input | 3 | - | ||||
| 7 | - | GND | Ground | 1 | 1 | ||||
| 8 | LVTTL-I | ModSelL | Module Select | 3 | - | ||||
| 9 | LVTTL-I | ResetL | Module Reset | 3 | - | ||||
| 10 | - | VccRx | +3.3V Power Supply Receiver | 2 | 2 | ||||
| 11 | LVCMOS- I/O | SCL | 2-wire Serial Interface Clock | 3 | - | ||||
| 12 | LVCMOS- I/O | SDA | 2-wire Serial Interface Data | 3 | - | ||||
| 13 | - | GND | Ground | 1 | 1 | ||||
| 14 | CML-O | Rx3p | Receiver Non-Inverted Data Output | 3 | - | ||||
| 15 | CML-O | Rx3n | Receiver Inverted Data Output | 3 | - | ||||
| 16 | - | GND | Ground | 1 | 1 | ||||
| 17 | CML-O | Rx1p | Receiver Non-Inverted Data Output | 3 | - | ||||
| 18 | CML-O | Rx1n | Receiver Inverted Data Output | 3 | - | ||||
| 19 | - | GND | Ground | 1 | 1 | ||||
| 20 | - | GND | Ground | 1 | 1 | ||||
| 21 | CML-O | Rx2n | Receiver Inverted Data Output | 3 | - | ||||
| 22 | CML-O | Rx2p | Receiver Non-Inverted Data Output | 3 | - | ||||
| 23 | - | GND | Ground | 1 | 1 | ||||
| 24 | CML-O | Rx4n | Receiver Inverted Data Output | 3 | - | ||||
| 25 | CML-O | Rx4p | Receiver Non-Inverted Data Output | 3 | - | ||||
| 26 | - | GND | Ground | 1 | 1 | ||||
| 27 | LVTTL-O | ModPrsL | Module Present | 3 | - | ||||
| 28 | LVTTL-O | IntL | Interrupt | 3 | - | ||||
| 29 | - | VccTx | +3.3V Power supply transmitter | 2 | 2 | ||||
| 30 | - | Vcc1 | +3.3V Power supply | 2 | 2 | ||||
| 31 | LVTTL-I | LPMode | Low Power Mode | 3 | - | ||||
| 32 | - | GND | Ground | 1 | 1 | ||||
| 33 | CML-I | Tx3p | Transmitter Non-Inverted Data Input | 3 | - | ||||
| 34 | CML-I | Tx3n | Transmitter Inverted Data Input | 3 | - | ||||
| 35 | - | GND | Ground | 1 | 1 | ||||
| 36 | CML-I | Tx1p | Transmitter Non-Inverted Data Input | 3 | - | ||||
| 37 | CML-I | Tx1n | Transmitter Inverted Data Input | 3 | - | ||||
| 38 | - | GND | Ground | 1 | 1 | ||||
| 1: GND is the symbol for signal and supply (power) common for the QSFP+ module. All are common within the QSFP+ module and all module voltages are referenced to this potential unless otherwise noted. Connect these directly to the host board signal-common ground plane. |
|||||||||
| 2: Vcc Rx, Vcc1 and Vcc Tx are the receiver and transmitter power supplies and shall be applied concurrently. Vcc Rx Vcc1 and Vcc Tx may be internally connected within the QSFP+ Module in any combination. The connector pins are each rated for a maximum current of 500mA. |
|||||||||
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.
