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QSFP-40G-SR4-S – QSFP – 850nm – 4 lanes – Transceiver Modules
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QSFP-40G-SR4-S Description
QSFP-40G-SR4-S is a Cisco 40GBASE-SR4 S-Class QSFP+ transceiver module designed for high-density, low-power 40 Gigabit Ethernet connectivity. Also referred to as "Cisco 40GBASE-SR4 S-Class module" or "QSFP+ 40G SR4", this module supports up to 100 meters on OM3 and 150 meters on OM4/OM5 multimode fiber, utilizing an MPO-12 connector. It offers a cost-effective solution for data center, enterprise, and high-performance computing networks requiring reliable, short-reach 40G optical links. The S-Class version is optimized for Ethernet applications and does not support FCoE or 4x10G breakout. Fully compliant with IEEE 802.3ba 40GBASE-SR4 standards, the QSFP-40G-SR4-S ensures seamless interoperability and simplified deployment.
Product Highlights
Data Rate
Wavelength
Max. Distance
Key Features
- Target Application: Entry-level, cost-sensitive 40G Ethernet deployments in data centers and campus networks.
- Scenario: Used primarily for short-reach backbone or aggregation links between switches and routers within the same rack or adjacent racks.
- Functional Highlights:
- Optimized for standard 40GBASE-SR4 Ethernet links using OM3/OM4 multimode fiber.
- Does not support FCoE or 4x10G breakout, making it ideal for customers who only need basic high-speed Ethernet connectivity.
- Perfect for high-density environments where simple plug-and-play 40G connectivity is required.
- Typical Users: Enterprises and data centers focused on simple, low-cost 40G upgrades with no storage traffic.
Applications Scenarios
Enterprise Data Centers
High-bandwidth aggregation and core switching in leaf-spine architectures.
Cloud Computing & HPC
Short-reach 40G links between servers, switches, and storage within racks or across rows.
Service Providers
Metro Ethernet and campus backbone connections requiring scalable, cost-effective 40G links.
Model comparison
|
Parameter |
QSFP-40G-SR4-S |
QSFP-40G-SR4 |
QSFP-40G-CSR4 |
|---|---|---|---|
|
Form Factor |
QSFP+ |
QSFP+ |
QSFP+ |
|
Data Rate |
40 Gbps |
40 Gbps |
40 Gbps |
|
Wavelength |
850 nm |
850 nm |
850 nm |
|
Connector Type |
MPO-12 |
MPO-12 |
MPO-12 |
|
Fiber Type |
OM3/OM4/OM5 MMF |
OM3/OM4/OM5 MMF |
OM3/OM4/OM5 MMF |
|
Max. Cable Distance |
100m (OM3)/150m (OM4) |
100m (OM3)/150m (OM4) |
300m (OM3)/400m (OM4) |
|
Power Consumption |
1.5 W |
1.5 W |
1.5 W |
|
4x10G Breakout Support |
No |
Yes |
Yes |
|
FCoE Support |
No |
Yes |
Yes |
|
Digital Diagnostics |
Yes |
Yes |
Yes |
|
Operating Temp |
0°C ~ 70°C |
0°C ~ 70°C |
0°C ~ 70°C |
Platform Compatibility
|
Platform Type |
Supported Series / Models |
|---|---|
|
Nexus Switches |
Nexus 9000, 7000, 5000, 6000, 3000, 2000 FEX |
|
Catalyst Switches |
Catalyst 9500, 9400, 9300, 9200, 6800, 3850, 3650 |
|
ASR Routers |
ASR 9000, ASR 1000 |
|
CRS Routers |
CRS Series |
|
Storage Switches |
MDS 9000 Series |
|
Other Devices |
Selected UCS Fabric Interconnects, RF Gateway, SCE 8000 |
Safety & Compliance
This product meets the following standards and compliance requirements:
- International Standards:
- IEEE 802.3ba: Compliant with 40GBASE-SR4 Ethernet standards
- QSFP+ MSA SFF-8436: Mechanical and electrical interface
- RoHS 6: Fully RoHS-compliant for environmental safety
- Laser Safety:
- Class 1 Laser Product (IEC 60825-1, 21CFR-1040)
- Electrical Safety:
- UL E116441 certified cable jacket
- Other Compliance:
- ELV and WEEE (Electronic waste and recycling regulations)
- Cisco Takeback and Reuse Program participation
Installation & Usage Tips
- Connector Requirements:
Use only MPO-12 (female) connectors with PC or UPC end-face types for optimal performance. Patch cords with APC connectors are not supported. - Fiber Type:
Use laser-optimized OM3, OM4, or OM5 multimode fiber.- OM3: Up to 100 meters
- OM4/OM5: Up to 150 meters
- Proper Handling:
- The module is hot-swappable; it can be installed or removed while the system is powered on.
- Before insertion, clean the MPO connector end face to avoid signal loss.
- Avoid touching the optical interface to prevent contamination.
- Breakout Usage:
The S-Class (QSFP-40G-SR4-S) does not support 4x10G breakout mode. For breakout functionality, use QSFP-40G-SR4 or QSFP-40G-CSR4. - Installation Procedure:
- Ensure you are grounded using an ESD wrist strap.
- Align the module to the QSFP+ port and gently slide it in until it clicks into place.
- Connect the MPO patch cable securely.
- Check module LED and diagnostics for proper operation.
- Removal:
Pull the bail latch downwards to release the module, and gently slide it out.
Specifications
| Parameter | Detail | Parameter | Detail |
|---|---|---|---|
| Form Factor | QSFP+ | Data Rate | 40 Gbps |
| Wavelength | 850 nm | Cable Type | OM3/OM4/OM5 MMF |
| Connector | MPO-12 | Max Distance (OM3/OM4/OM5) | 100m / 150m / 150m |
| Power Consumption | 1.5W | Operating Temp. | 0°C to 70°C |
| FEC Required | No | Digital Diagnostics | Yes |
| Compliance | IEEE 802.3ba, QSFP+ MSA SFF-8436 | Dimensions (HxWxD) | 13.5 x 18.4 x 72.4 mm |
| Weight | <100g |
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Stable light levels across all 4 lanes. Very happy with the quality.
Finishing the fight… against latency. Good gear.
Migrating our core to 40G. These S-class optics are cost effective and work great.
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Analysis complete: Hardware is authentic. Efficiency increased.