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FET-40G-C
40G Fabric Extender Transceiver Cisco Compatible
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FET-40G-C is a high-performance QSFP+ transceiver module engineered to deliver 40G data rates over fiber, featuring LC duplex connectors and optimized for long-range transmission up to 10 km on single-mode fiber. Designed with essential protocols like Ethernet and Fibre Channel in mind, it offers a compact form factor that meets modern data center, enterprise, and telecom network requirements.
Engineered for demanding network environments, FET-40G-C provides reliable, low-latency performance while conforming to strict physical dimensions and operating conditions. Its precise design—featuring standardized dimensions, a 3.3V input voltage, and an operating temperature range from 0 to 70°C—ensures seamless compatibility with leading networking platforms including Cisco, Juniper, Huawei, and Arista.
FET-40G-C price is is available on request. Get immediate quote.
Request bulk order quote for FET-40G-C for additional pricing. Browse the full Cisco Compatible Qsfp+ series or explore all Orm products.
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| FET-40G-C |  QSFP-40G-ER4-C |  QSFP-40GE-LR4-C |  QSFP-40G-CSR4-C |  QSFP-40G-SR4-C | |
|---|---|---|---|---|---|
| Product Type | Transceiver | Transceiver | Transceiver | Transceiver | Transceiver |
| Form Factor | QSFP+ | QSFP | QSFP | QSFP | QSFP |
| Data Rate | 40G | 40G | 40G | 40G | 40G |
| Connector Type | LC | LC | LC | LC | MPO |
| Wavelength | 1310 nm | 1310 nm | 1310 nm | N/A | 850nm |
| Transmission Distance | Long-Range | Extended-Range | Long-Range | Short-Range | Short-Range |
| Fiber Type | Single-mode | Single-mode | Single-mode | N/A | Multi-mode |
| Max Distance | 10 km | 40 km | 10 km | N/A | 100m (OM3)/150m (OM4) |
| Supported Protocols | Ethernet, Fibre Channel | Ethernet | Ethernet | Ethernet | Ethernet |
| Network Interface | Fiber | Fiber | Ethernet | Ethernet | Ethernet |
| Power Consumption | 3.8 W | N/A | 3.0 W | N/A | 4.2W |
| 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 | N/A | 3.3V | 3.3V | 3.3V |
| Compatibility | Cisco, Juniper, Huawei, Arista | Cisco | Cisco, Juniper, Huawei, Arista | Cisco | Cisco / Juniper / Huawei / Arista |
| Product Name | FET-40G-C | QSFP-40G-ER4-C | QSFP-40GE-LR4-C | QSFP-40G-CSR4-C | QSFP-40G-SR4-C |
| Height | 0.73 inches | N/A | 0.2 inches | N/A | N/A |
| Width | 2.85 inches | N/A | 0.55 inches | N/A | N/A |
| Depth | 1.48 inches | N/A | 0.375 inches | N/A | N/A |
| Weight | 0.11 lbs | N/A | 0.15 lbs | N/A | N/A |
Perfect for our Cisco Fabric Extender links. This FET-40G is recognized correctly and provides stable connectivity between our Nexus switches. Very reliable.
Consistent 40G performance for our FEX architecture. This module is robust and was recognized instantly. A dependable and cost-effective alternative for data centers.
Exceptional build quality. This FET-40G transceiver delivers rock-solid performance for our fabric extensions. No issues with signal integrity or latency. Highly recommended.
Reliable and high-performing module for Fabric Extenders. Seamlessly compatible with our Cisco gear. It provided the high-speed link we needed without any hassle.
Professional-grade FET-40G. It delivers stable signaling and full hardware compatibility. Extremely satisfied with the performance and durability of this transceiver in our production.
The FET-40G-C is a Cisco-compatible QSFP+ transceiver designed for 40 GbE fabric extension over multimode fiber, delivering high-density, low-latency connectivity in data center networks.
Yes. The FET-40G-C is fully interoperable with Cisco Nexus and Catalyst series switches, supporting native 40 GbE QSFP+ ports without firmware upgrades or vendor locks.
The FET-40G-C uses the industry-standard QSFP+ (Quad Small Form-Factor Pluggable Plus) form factor in compliance with the SFF-8436 specification.
It requires a 12-fiber MPO/MTP connector, supporting parallel multimode fiber links for 40 GbE transmission.
The transceiver operates at an 850 nm wavelength, optimized for OM3 and OM4 multimode fiber applications.
The FET-40G-C supports up to 100 m on OM3 fiber and up to 150 m on OM4 fiber at 40 GbE data rates.
The transceiver consumes less than 3.5 W under full load, ensuring energy-efficient operation in high-density environments.
The FET-40G-C operates reliably in a temperature range from 0 °C to 70 °C (extended industrial range available on request).
Yes. The QSFP+ design allows hot-plug insertion and removal without powering down the host switch or disrupting other links.
First, insert the transceiver into an empty QSFP+ slot until it latches. Next, connect the MPO/MTP fiber cable and verify link status via the switch CLI or GUI.
It supports leaf-spine architectures, FEX uplinks, server interconnects, high-performance computing (HPC) clusters, and storage area networks (SANs).
The product includes a one-year limited warranty covering manufacturing defects, with options for extended coverage and advanced replacement.
Yes. It meets IEEE 802.3ba for 40 GbE, SFF-8436 QSFP+ MSA, and RoHS 6/6 environmental standards.
Yes. The transceiver provides real-time DDM access to parameters such as optical power, temperature, voltage and laser bias current via the I2C interface.
Each package contains the FET-40G-C transceiver module, protective dust caps, and a quick-start installation guide.
In-stock orders ship within 1–2 business days. Expedited shipping and bulk order lead times may vary based on availability.
Verify fiber cleanliness, confirm switch port configuration, check DDM parameters for power and temperature, and test with a known good cable or transceiver.