QSFP-40G-CSR4 Cisco Compatible 40G 400m MMF Transceiver

The QSFP-40G-CSR4 is a 40G optical transceiver compatible with Cisco platforms. Plug-and-play, no configuration required.

• Data Rate: 40G
• Fiber Type: MMF
• Reach: 400m
• Connector: Duplex LC
• OEM Equivalent: QSFP-40G-CSR4

OEM-compatible and MSA-compliant. Manufactured to supplier specifications following ISO-certified processes. Class 1 laser certified, RoHS compliant. Digital Diagnostic Monitoring (DDM/DOM) supported. Every module is tested for traffic conformity per supported layer 2/3 protocols, DOM threshold verification, EEPROM/MSA value verification, serial number verification, and optical cleanliness before shipment.

Backed by TenFourOptics' GreenLights4Life® lifetime warranty — buy it once, covered forever. In stock and ships same or next business day. Trusted by network engineers and procurement teams across North America for over 10 years.