Product Overview
The QSFP-40G-eSR4 belongs to Huawei’s 40G series and implements 41.25 Gbit/s 40GBASE-SR4 transmission as four parallel 10G lanes over 850 nm multimode fiber, using an MPO-12 connector in the QSFP+ footprint. Huawei documents reaches of 400 m on OM4, 300 m on OM3 and 82 m on OM2, an extended-reach profile versus the 100 m/150 m of standard 40G SR4 modules.
Because all four lanes ride the same parallel ribbon, existing OM3/OM4 trunk cabling can be reused for 40G without new installs up to these distances. The module is specified for a 0°C to +70°C operating case temperature for standard data-hall environments.
Typical applications include 40G spine-leaf and core interconnects inside the data center, 40G uplinks from 10G aggregation layers, and links to legacy 40G server or storage arrays over installed OM3/OM4 ribbon fiber.
- 40GBASE-SR4 41.25 Gbit/s (4×10.3125 Gbit/s lanes) over 850 nm MMF
- Extended reach: OM4 400 m / OM3 300 m / OM2 82 m per Huawei official table
- MPO connector, hot-pluggable QSFP+ footprint
- 0°C to +70°C commercial case temperature range
- Reuses installed OM3/OM4 ribbon cabling for 40G upgrades
| Rate | 41.25 Gbit/s (40GBASE-SR4, 4×10.3125 Gbit/s) |
| Interface | QSFP+, MPO |
| Wavelength | 850 nm |
| Reach | OM4 400 m; OM3 300 m; OM2 82 m |
| Fiber | MMF (OM2-OM4) |
| Operating Temperature | 0°C to +70°C (case) |
| Compatibility | Huawei QSFP+ slots, 40GBASE-SR4 (IEEE 802.3bm) |
Key Features of QSFP-40G-eSR4 40GBASE-SR4 850nm
QSFP-40G-eSR4 40GBASE-SR4 850nm belongs to the pluggable optical transceiver family used for high-speed data links. Modules of this class commonly cover form factors such as SFP, SFP+, SFP28, QSFP+, QSFP28 and QSFP-DD, with multimode and singlemode variants for different reach requirements.
Typical Applications of QSFP-40G-eSR4 40GBASE-SR4 850nm
Optical modules of this type are widely used for switch-to-switch links, storage networks, data center interconnects and telecom transmission equipment. Match the module to your switch vendor, wavelength and link distance before ordering.
Selecting QSFP-40G-eSR4 40GBASE-SR4 850nm with BS Comtec
BS Comtec supplies optical transceivers from Huawei, Cisco, Accelink and other brands with global delivery. Send us your switch model, port type and required distance, and we will recommend compatible modules and provide pricing.
Frequently Asked Questions
How do I choose the right QSFP-40G-eSR4 40GBASE-SR4 850nm for my network?
Check your equipment port type, data rate, fiber type (multimode or singlemode), wavelength and link distance. BS Comtec can cross-check these details and suggest compatible options from multiple brands.
Is QSFP-40G-eSR4 40GBASE-SR4 850nm compatible with my switch or router?
Most platforms work with standard-compliant modules, while some vendors apply compatibility lists or coded modules. Share your device model with BS Comtec and we will confirm suitability before shipment.
How is QSFP-40G-eSR4 40GBASE-SR4 850nm packed and delivered?
Modules are shipped in anti-static packaging suitable for international transport. BS Comtec arranges global delivery, and shipping options depend on destination and urgency — contact us for details.
What warranty applies to QSFP-40G-eSR4 40GBASE-SR4 850nm?
Warranty follows the manufacturer’s policy for the specific part number. BS Comtec supports replacement and RMA coordination according to the terms confirmed in your order.
Where is QSFP-40G-eSR4 40GBASE-SR4 850nm typically used?
It is typically used in data centers, enterprise networks, carrier transmission and campus backbones for high-speed fiber connections between switches, routers and storage systems.
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