Which connector style does the QFX-QSFP-40G-SR4 require?

This transceiver is listed under the 40G multimode MPO or MTP 850 nm up to 150 m category, indicating that it uses an MPO or MTP style connector. Cabling plans should therefore accommodate multimode fiber with MPO or MTP connectivity for proper integration.

What is the main application for the QFX-QSFP-40G-SR4 module?

The QFX-QSFP-40G-SR4 is intended for 40 Gigabit Ethernet deployments that use QSFP+ 40GBASE-SR4 optics. As a 40G multimode MPO or MTP 850 nm up to 150 m transceiver, it is typically applied to short-reach, high-density links such as data center or campus aggregation connections.

How is the QFX-QSFP-40G-SR4 identified for ordering and inventory?

This transceiver is identified by model QFX-QSFP-40G-SR4 and SKU 740-067442. Using the exact SKU and model in procurement and asset management systems helps avoid part confusion and ensures that the correct 40GBASE-SR4 QSFP+ optic is delivered and tracked.

Is the QFX-QSFP-40G-SR4 suitable for multimode fiber deployments?

Yes, the QFX-QSFP-40G-SR4 is categorized as a 40G multimode MPO or MTP 850 nm up to 150 m transceiver. This classification indicates that it is designed for use with multimode fiber, using an MPO or MTP connector for parallel 40G optical links over short distances.

740-067442 - Juniper Networks 740-067442 40GBASE-SR4 QSFP+ transceiver

Name: Juniper Networks 740-067442 40GBASE-SR4 QSFP+ transceiver
Brand: Juniper
SKU: 740-067442
Price: 98 USD
Availability: InStock

740-067442 - Juniper Networks 740-067442 40GBASE-SR4 QSFP+ transceiver | US IT Hardware

Product overview

The Juniper Networks QFX-QSFP-40G-SR4 is a QSFP+ 40GBASE-SR4 optical transceiver, identified by SKU 740-067442. It is designed for 40 Gigabit Ethernet connectivity in environments that use multimode fiber. As a QSFP+ optical transceiver, it supports the 40GBASE-SR4 standard, aligning with common short-reach 40G applications in data centers and campus networks. The module belongs to the 40G multimode MPO or MTP 850 nm up to 150 m category, indicating operation around the 850 nm wavelength on multimode fiber over short distances. With its QSFP+ form factor and optical SR4 interface, the QFX-QSFP-40G-SR4 fits high-density switching platforms that require compact 40G uplinks. The use of an MPO or MTP style connector simplifies structured cabling for parallel fiber links in aggregation or core layers, supporting scalable 40G deployments.

Juniper Networks QFX-QSFP-40G-SR4 40GBASE-SR4 module
QSFP+ 40G multimode MPO or MTP optical transceiver
Designed for 40 Gigabit Ethernet short-reach links
Operates in 850 nm up to 150 m category class
Supports multimode fiber cabling with MPO or MTP
SKU 740-067442 for precise procurement tracking

Expedited and overnight shipping options are available at checkout, priced by destination and service.
Purchase orders accepted from qualified institutions.
Refunds within 14 days and replacements within 30 days of delivery with an RMA (25% restocking fee on customer-initiated returns), and every part carries our Standard 30-Day Warranty - see our return policy or contact US IT Hardware.

Featuring

Transmitter Fibers
Manufacturer part #	740-067442
Brand	Juniper
Condition	New
Model	QFX-QSFP-40G-SR4
Data Rate	40 Gbps
Lane Count	4 lanes
Wavelength	850 nm
Product Line	QFX
Product Type	Optical transceiver
Bit Error Rate	1 x 10^-12 or better
Technology Type	Networking

Best for

Data center 40G
Suitable for data center 40 Gigabit Ethernet links that require QSFP+ 40GBASE-SR4 optical transceivers operating around 850 nm on multimode fiber over short distances.
Campus aggregation
Applicable for campus aggregation where 40G multimode MPO or MTP 850 nm up to 150 m transceivers are used to connect aggregation and core switches.
Core switching
Useful in core switching environments that standardize on QSFP+ 40GBASE-SR4 optical transceivers with multimode MPO or MTP connectivity.
High-density 40G uplinks
Designed for switches requiring QSFP+ form factor optics that support 40GBASE-SR4 over multimode fiber using MPO or MTP connectors.
Short-reach optical links
Intended for short-reach optical connections leveraging 40G multimode MPO or MTP 850 nm up to 150 m capabilities.

Frequently asked questions

What type of transceiver is the Juniper QFX-QSFP-40G-SR4?

Details

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Breakout Capability	Breakout capable (4x10G)

Cable Type Supported	OM3 MMF; OM4 MMF

Diagnostic Monitoring	Digital diagnostics supported (DDM)

Supported Applications	40G Ethernet; 4x10G Ethernet breakout

Maximum Distance on OM3	100 m

Maximum Distance on OM4	150 m

Signaling Rate Per Lane	10 Gbps per lane

Transceiver Form Factor	QSFP+

Fiber Core Cladding Size	50/125 µm

Receiver Overload (per lane)	2.4 dBm

Transmitter Wavelength Range	840 nm to 860 nm

Receive Lane Wavelength Range	840 nm to 860 nm

Receiver Sensitivity (per lane)	-7.6 dBm

Maximum Transmit Power (per lane)	2.4 dBm

Minimum Transmit Power (per lane)	-7.6 dBm

Media Type	Multimode fiber (MMF)
Effective Modal Bandwidth OM3	2000 MHz·km
Effective Modal Bandwidth OM4	4700 MHz·km

Supply Voltage	3.3 V
Maximum Power Consumption	3.5 W

Networking Ports & Interfaces

Interface	QSFP (Quad Small Form-factor Pluggable)
Port Type	QSFP+ 40G port
Host Interface	QSFP+ edge connector
Fiber Connector	MPO/MTP
Fiber Interface	MPO/MTP 12-fiber female
Ethernet Standard	40GBASE-SR4

Juniper Networks 740-067442 40GBASE-SR4 QSFP+ transceiver