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QSFP cable connected our switches instantly. Stack stability has been excellent.
LSWM1QSTK1
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40G QSFP+ 3m Cable
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LSWM1QSTK1
- Description:
- 40G QSFP+ 3m Cable
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LSWM1QSTK1 Overview
LSWM1QSTK1 is a QSFP transceiver that supports a 100G data rate using LC connectors for reliable long-range optical transmission. Designed for high-performance applications, this transceiver meets the demands of Ethernet and Fibre Channel networks while featuring a compact form factor with precise physical dimensions for easy integration into data centers, enterprise networks, and telecom infrastructures.
LSWM1QSTK1 delivers dependable connectivity over single-mode fiber across extended distances of up to 80 km. With robust optical performance, efficient power consumption, and universal compatibility with major networking brands like Cisco, Juniper, Huawei, and Arista, it is engineered to support the most demanding networking environments.
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LSWM1QSTK1 Specifications
- Product Type
- Transceiver
- Connector Type
- LC
- Network Interface
- Fiber
- Operating Temperature
- 0 to 70°C
- Storage Temperature
- -40 to 85°C
- Input Voltage
- 3.3V
- Wavelength
- 1310 nm
- Transmission Distance
- Long-Range
- Fiber Type
- Single-mode
- Supported Protocols
- Ethernet, Fibre Channel
- Compatibility
- Cisco, Juniper, Huawei, Arista
- Height
- 0.81 inches
- Form Factor
- QSFP
- Max Distance
- 80 km
- Weight
- 0.15 lbs
- Data Rate
- 100G
- Power Consumption
- 11.5 W
- Product Name
- LSWM1QSTK1 100G QSFP Transceiver
- Width
- 1.09 inches
- Depth
- 0.29 inches
LSWM1QSTK1 Use Case
High-Density Data Center Top-of-Rack Aggregation
In a high-density data center environment, network engineers deploy the LSWM1QSTK1-40G QSFP+ 3m Cable to directly link 40GbE top-of-rack switches with leaf spine switches. This solution delivers up to 40 Gbps of bidirectional throughput with ultra-low latency and minimal signal degradation, streamlining cable management and maximizing server virtualization and storage performance.
High-Performance Computing Cluster Interconnect
For compute-intensive HPC installations running MPI and distributed analytics, IT architects use the LSWM1QSTK1-40G QSFP+ 3m Cable to interconnect compute nodes and high-speed switches over 40 GbE. The cable’s robust QSFP+ design ensures low jitter and high signal integrity, accelerating job completion times and improving cluster throughput by up to 30%.
Campus Network Backbone Upgrade to 40G
When upgrading a university or corporate campus backbone, network teams install the LSWM1QSTK1-40G QSFP+ 3m Cable between core and distribution switches to replace legacy 10 GbE links. By upgrading to 40 Gbps optical interconnects, organizations achieve four-fold capacity gains, future-proof network scalability, and simplified maintenance with a single QSFP+ interface.
Quality Certifications
To get the detailed certification, please go to the Compliance Center.
Product Comparison Table 
| LSWM1QSTK1 |  LSPM1AC360 |  SFP-GE-LX-SM1310-A |  SFP-GE-SX-MM850-A |  SFP-XG-LX-SM1310-E | |
|---|---|---|---|---|---|
| Product Type | Transceiver | Transceiver | Transceiver | Transceiver | Transceiver |
| Form Factor | QSFP | SFP+ | SFP | SFP | SFP |
| Data Rate | 100G | 10G | 1G | 1G | 10G |
| Connector Type | LC | LC | LC | LC | LC |
| Wavelength | 1310 nm | 1310 nm | 1310nm | 850 nm | 1310 nm |
| Transmission Distance | Long-Range | Long-Range | Long-Range | Short-Range | Long-Range |
| Fiber Type | Single-mode | Single-mode | Single-mode | Multi-mode | Single-mode |
| Max Distance | 80 km | 80 km | 10 km | 550 meters | 10 km |
| Supported Protocols | Ethernet, Fibre Channel | Ethernet, Fibre Channel | Ethernet | Ethernet | Ethernet |
| Network Interface | Fiber | Fiber | Fiber | Fiber | Fiber |
| Power Consumption | 11.5 W | 3.5W | N/A | 1.5 W | N/A |
| Operating Temperature | 0 to 70°C | 0 to 70°C | 0 to 70°C | 0 to 70°C | 0 to 70°C |
| Storage Temperature | -40 to 85°C | -40 to 85°C | -40 to 85°C | -40 to 85°C | -40 to 85°C |
| Input Voltage | 3.3V | 3.3V | 3.3V | 3.3V | 3.3V |
| Compatibility | Cisco, Juniper, Huawei, Arista | Cisco, Juniper, Huawei, Arista | Cisco | Cisco / Juniper / Huawei / Arista | N/A |
| Product Name | LSWM1QSTK1 100G QSFP Transceiver | LSPM1AC360 10G SFP+ Transceiver Module | SFP-GE-LX-SM1310-A | SFP-GE-SX-MM850-A | SFP-XG-LX-SM1310-E |
| Height | 0.81 inches | 0.5 inches | N/A | N/A | N/A |
| Width | 1.09 inches | 0.9 inches | N/A | N/A | N/A |
| Depth | 0.29 inches | 1.2 inches | N/A | N/A | N/A |
| Weight | 0.15 lbs | 0.2 lbs | N/A | N/A | N/A |
Reviews & Ratings
A
Ayesha Salman
5
Good quality cable with secure fit and no signal issues.
D
Dominic Fowler
4
Stacking performance improved noticeably after installation.
U
Usman Latif
4
Reliable accessory for switch stacking.
H
Henry Walsh
4
Works exactly as expected with no downtime.
Questions & Answers
What is the LSWM1QSTK1 40G QSFP+ 3m cable?
The LSWM1QSTK1 is a 3-meter, 40 Gbps QSFP+ direct-attach twinax cable providing cost-effective, low-latency connectivity for data center and high-performance computing environments.
Is the LSWM1QSTK1 cable active or passive?
The LSWM1QSTK1 is a passive copper twinax cable, requiring no external power while delivering reliable, high-speed 40 Gbps data links up to 3 meters.
Which transceiver connectors does this cable use?
This cable features QSFP+ (Quad SFP+) connectors on both ends, fully compliant with MSA standards for seamless integration with QSFP+ ports.
What maximum data rate does the 40G QSFP+ cable support?
The LSWM1QSTK1 supports line rates up to 40 Gbps per port, ideal for 40 Gigabit Ethernet, InfiniBand QDR, and other high-bandwidth applications.
What is the maximum reach of this 40G QSFP+ 3m cable?
With its 3-meter length, this passive twinax cable delivers error-free 40 Gbps links within racks and across adjacent rack aisles in data center deployments.
Is the LSWM1QSTK1 backward compatible with lower speeds?
Yes. When paired with compatible QSFP+ ports, it supports downshifts to 4×10 Gbps operation (4×10 G breakout), enabling flexible 10 GbE connectivity.
How do I install the LSWM1QSTK1 cable?
Simply align the QSFP+ latches with the port, insert until the latch clicks, and secure both ends—no configuration or drivers are required for plug-and-play operation.
Which devices are compatible with this cable?
The LSWM1QSTK1 is compatible with any QSFP+-equipped switch, router or network interface card (NIC) supporting 40 Gbps MSA-compliant twinax cables.
Does the cable support hot-swapping?
Yes. The LSWM1QSTK1 supports hot-plug and hot-swap functionality, allowing insertion or removal without shutting down the host device.
What operating temperature range does the cable support?
This cable is rated for -10 °C to +70 °C (14 °F to 158 °F), ensuring reliable performance in standard data-center and telecom environments.
Is the LSWM1QSTK1 MSA compliant?
Yes. It conforms to the QSFP+ Multi-Source Agreement (MSA) specifications for interoperability and industry-standard reliability.
How do I maintain and clean the QSFP+ connectors?
Use lint-free swabs with isopropyl alcohol to gently wipe the connector end faces, then allow connectors to air-dry fully before reinsertion.
What warranty covers the 40G QSFP+ 3m cable?
The LSWM1QSTK1 includes a limited lifetime warranty against defects in materials and workmanship when used under normal conditions.
Can I use this cable for InfiniBand applications?
Yes. It supports InfiniBand QDR (40 Gbps) and is fully compatible with QSFP+ ports on InfiniBand switches and HCAs.
Where can I purchase the LSWM1QSTK1 40G QSFP+ 3m cable?
You can order this cable directly from our online store or authorized partners. Visit our website’s product page or contact sales for volume pricing.