QFX-QSFP-40G-SR4 Juniper Compatible 40G SR4 150m MMF Transceiver

The QFX-QSFP-40G-SR4 is a 40G QSFP optical transceiver engineered as a drop-in equivalent for Juniper platforms, programmed to the host EEPROM so it comes up as a native module with no configuration required.

• Form Factor: QSFP
• Data Rate: 40G
• Protocol: SR4
• Fiber Type: MMF
• Reach: 150m
• Connector: Duplex LC
• OEM Equivalent: QFX-QSFP-40G-SR4

Compatibility: Documented OEM compatibility (Juniper published compatibility documentation): this module is accepted in 40G QSFP+ ports on the EX3400 Series, EX4600 Series, EX4650 Series, PTX10000 Series, QFX10000 Series, QFX5100 Series, and QFX5120 Series. This module follows Juniper's published compatibility matrix; for your exact line card or OS release, email 10.4@tenfouroptics.com and we'll confirm fit.

Tested & Proven: Every TenFour Optics part is coded, tested, and verified before shipment — see Tested & Proven.

Short-reach multimode optics like this one live inside the data center — server-to-leaf, leaf-to-spine, and in-row links over OM3 and OM4 fiber where cost-per-port matters more than distance. It is the high-volume workhorse of east-west fabric, keeping optics cost and power low across thousands of ports in a modern build. It operates 150m.

Host-programmed and qualified against Juniper platforms, it slots in beside existing OEM and third-party optics, reports clean DDM telemetry, and needs no special configuration to bring the link up.

Before shipment every module is coded to the host platform, then verified for protocol conformity, diagnostic accuracy, and end-face cleanliness. Class 1 laser certified, RoHS compliant.

Backed by the GreenLights4Life® Limited Lifetime Replacement Warranty. In stock and ships same or next business day.