40G QSFP+
40GBASE-SR4 QSFP+ 100m Optical Transceiver
40GBASE-SR4 QSFP+ optical transceiver for parallel multimode links up to 100m on OM3 or 150m on OM4, with an 850nm MPO interface and DDM/DOM.
Specifications
- Warranty
- 3-Years
- Customization
- Free OEM labeling
- Delivery Time
- 48 hours dispatch
- Confirm the short-reach link conditions first.
Suitable for data center and enterprise short-reach links.
40G QSFP+ port
MPO parallel multimode fiber
Reach up to 100m
Confirm that the host device supports a standard 40G QSFP+ port, the required compatibility coding.
Use OM3 or OM4 parallel multimode fiber with the correct MPO connector and polarity.
Check fiber grade, MPO polarity, insertion loss and total route length before deployment.
- Match the SR4 module to the fiber plant.
Confirm the host port, FEC setting, MPO polarity and multimode fiber grade before ordering.
Ethernet standard | IEEE 802.3ba 40GBASE-SR4 |
|---|---|
Data rate | 40GbE (4 × 10.3125Gbps optical lanes) |
Form factor | QSFP+ |
Maximum reach | 70m on OM3; 150m on OM4 with host FEC |
Fiber type | OM3 or OM4 multimode fiber |
Connector | MPO parallel interface |
Wavelength / optical design | 850nm VCSEL |
DDM / DOM | Supported |
Operating temperature | 0°C to 70°C |
Power consumption | Below 1.5W |
- Typical 40G SR4 deployment scenarios
Use these as starting points, then confirm the host port, MPO polarity and fiber grade.
- 40G switch-to-switch link
Parallel multimode connection between two 40G QSFP+ ports.
Check before order: host model, coding, FEC, MPO polarity and fiber grade.
- 40G switch to high-speed server NIC
40G SR4 link from a leaf switch to a server NIC or short-reach aggregation interface.
- Quality Coordination
Axonode coordinates product selection, coding and quality requirements with vetted OEM manufacturing and testing partners according to the target project.
- Pre-shipment Verification
Available verification scope is confirmed according to the product, quantity, host platform and project requirements before shipment.
Testing and validation are coordinated according to the agreed project requirements.
Nearby 40G options to compare before ordering
The speed may be the same, but the fiber design, reach, and deployment trade-offs are not.
40G option | Typical Reach | Fiber/connector | Best Fit | Checking before ordering |
|---|---|---|---|---|
40GBASE-SR4 | 100m OM3 / 150m OM4 | MMF / MPO | Short-reach data center links | Fiber grade, MPO polarity and host coding |
40GBASE-eSR4 | 300m OM3 / 400m OM4 | MMF / MPO | Extended multimode links | Fiber grade, insertion loss and MPO polarity |
40GBASE-LR4 | 10km | OS2 SMF / duplex LC | Campus and aggregation links | Link budget, host coding and fiber route |
40GBASE-ER4 | 40km | OS2 SMF / duplex LC | Metro and regional links | Optical budget, dispersion and receiver overload |
40G BiDi | Reach varies by pair | OS2 SMF / simplex LC | Single-fiber capacity upgrades | Complementary TX/RX pair and link budget |
Frequently Asked Questions
What fiber is required for 40GBASE-SR4?
Use parallel OM3 or OM4 multimode fiber with the correct MPO connector and polarity.
Can the 40G SR4 module be coded for Cisco or other platforms?
Coding can be prepared after the exact host platform and software version are reviewed.
Compatibility is not inferred from the QSFP+ form factor alone.
What reach is supported on OM3 and OM4 fiber?
The verified reach is 100m on OM3 and 150m on OM4 under the specified link conditions.
Can 40GBASE-SR4 use a duplex LC patch cord?
No. 40GBASE-SR4 uses a parallel MPO multimode interface; a duplex LC patch cord is not the correct fiber connection for this module.
What should I check if the SR4 link does not come up?
Check the host configuration and FEC setting, verify MPO polarity, inspect and clean all connectors, and confirm that the OM3 or OM4 route is within the supported reach.