MSA-compliant 40G QSFP+ transceivers: SR4 (100 m on OM3), LR4 (10 km), ER4 (40 km), BIDI variants. For data center aggregation and HPC. Compatible with Cisco, Juniper, Arista.
Last updated August 2026
Request a QuoteThe 40G and 56G category is dominated by the QSFP+ (Quad Small Form-factor Pluggable) form factor, which carries four 10G lanes in parallel to achieve 40 Gbps aggregate throughput. QSFP+ is also used for 56G Infiniband FDR (4×14G), making it the standard for both 40GbE Ethernet and high-performance computing (HPC) interconnects.
QSFP+ is a compact form factor that houses four 10G electrical channels, delivering 40 Gbps total bandwidth. It serves both 40GbE Ethernet and 56G Infiniband FDR applications.
SR4 (short-reach 4-fiber): up to 100 m on OM3, 150 m on OM4. LR4 (long-reach 4-wavelength CWDM): 10 km on single-mode. ER4: 40 km. BIDI: 20 km on a single fiber pair. PSM4: 500 m to 2 km on SMF using 4 parallel single-mode fibers.
Yes. All Coretek Opto QSFP+ modules are MSA-compliant and compatible with Cisco Nexus 9000/7000, Juniper EX9200/QFX10000, Arista 7500E, Dell S-series, and Mellanox/NVIDIA SN series switches.
40G remains the aggregation and spine standard in mid-scale data centers and enterprise cores. QSFP+ is widely used for 40GbE aggregation and WAN edge uplinks. QSFP+ to 4×SFP+ breakout cables allow a single 40G port to connect to four separate 10G servers, making it a cost-effective top-of-rack strategy. Industrial-rated variants are available for utilities, defense, and outdoor telecom enclosures.
All QSFP+ modules are made in Taiwan by Coretek Opto, founded in 2001. NAFO, Coretek’s exclusive North American representative, handles orders for Canada and the United States from Richmond, BC. There is no online checkout; submit a quote request and we respond within 1 business day.
| Form Factor | Data Rate | Description | Optics | Distance | Connector | Temp | |
|---|---|---|---|---|---|---|---|
| QSFP+ | 40 Gb/s | 40G OTU3 QSFP+ | 850nm / MMF | 100 m | MPO | C&I | Get Quote → |
| QSFP+ | 40 Gb/s | 40G OTU3 QSFP+ | CWDM4 / SMF | 10 km | LC | C&I | Get Quote → |
| QSFP+ | 40 Gb/s | 40G OTU3 QSFP+ | CWDM4 / SMF | 20 km | LC | C&I | Get Quote → |
| QSFP+ | 40 Gb/s | 40G OTU3 QSFP+ | CWDM4 / SMF | 40 km | LC | C&I | Get Quote → |
| QSFP+ | 40 Gb/s | 40G OTU3 QSFP+ | CWDM4 / SMF | 80 km | LC | C | Get Quote → |
| QSFP+ | 4×10.3125 Gb/s | 40G QSFP+ | 850nm / MMF | 150 m | MPO | C&I | Get Quote → |
| QSFP+ | 4×10.3125 Gb/s | 40G QSFP+ | 850nm / MMF | 400 m | MPO | C&I | Get Quote → |
| QSFP+ | 4×10.3125 Gb/s | 40G QSFP+ | 1310nm / SMF | 2 km | MPO | C&I | Get Quote → |
| QSFP+ | 4×10.3125 Gb/s | 40G QSFP+ | 1310nm / SMF | 10 km | MPO | C&I | Get Quote → |
| QSFP+ | 4×10.3125 Gb/s | 40G QSFP+ | CWDM4 / SMF | 10 km | LC | C&I | Get Quote → |
| QSFP+ | 4×10.3125 Gb/s | 40G QSFP+ | CWDM4 / SMF | 20 km | LC | C&I | Get Quote → |
| QSFP+ | 4×10.3125 Gb/s | 40G QSFP+ | CWDM4 / SMF | 40 km | LC | C&I | Get Quote → |
| QSFP+ | 4×10.3125 Gb/s | 40G QSFP+ | LWDM / SMF | 80 km | LC | C | Get Quote → |
| QSFP+ | 40G QSFP+ | 850/900 / MMF | 100 m | LC | C | Get Quote → | |
| QSFP+ | 4×10.3125 Gb/s | 40G QSFP+ | 850 880 910 940 / MMF | 350 m | LC | C | Get Quote → |
| QSFP28 | 53.125 Gb/s | 50G QSFP28 | 1310nm / SMF | 10 km | LC | C | Get Quote → |
| QSFP28 | 53.125 Gb/s | 50G QSFP28 | 1310nm / SMF | 40 km | LC | C | Get Quote → |
| QSFP28 | 53.125 Gb/s | 50G QSFP28 | 1310nm / SMF | 80 km | LC | C | Get Quote → |
| QSFP28 | 53.125 Gb/s | 50G QSFP28 | TX1271/RX1331 / SMF | 10 km | LC | C | Get Quote → |
| QSFP28 | 53.125 Gb/s | 50G QSFP28 | TX1331/RX1271 / SMF | 10 km | LC | C | Get Quote → |
| QSFP28 | 53.125 Gb/s | 50G QSFP28 | TX1295/RX1309 / SMF | 40 km | LC | C | Get Quote → |
| QSFP28 | 53.125 Gb/s | 50G QSFP28 | TX1309/RX1295 / SMF | 40 km | LC | C | Get Quote → |
| SFP56 | 53.125 Gb/s | 50G SFP56 | 850nm / MMF | 100 m | LC | C | Get Quote → |
| SFP56 | 53.125 Gb/s | 50G SFP56 | 1310nm / SMF | 2 km | LC | C&I | Get Quote → |
| SFP56 | 53.125 Gb/s | 50G SFP56 | 1310nm / SMF | 10 km | LC | C&I | Get Quote → |
| SFP56 | 53.125 Gb/s | 50G SFP56 | 1310nm / SMF | 20 km | LC | C | Get Quote → |
| SFP56 | 53.125 Gb/s | 50G SFP56 | 1310nm / SMF | 40 km | LC | C | Get Quote → |
| QSFP+ | 4×14.0625 Gb/s | 56G QSFP+ | 850nm / MMF | 150 m | MPO | C&I | Get Quote → |
C = Commercial (0°C to 70°C) · I = Industrial (−40°C to 85°C)