Which vendor environment is the QSFP-40G-SR4-AR-ST targeted at?

This module is explicitly described as Arista Networks QSFP-40G-SR4 compatible. That means it is targeted at environments that use Arista platforms and reference the QSFP-40G-SR4 optics family. Buyers can map this part against existing Arista QSFP-40G-SR4 designations in bills of materials and network standards.

What transceiver type does the QSFP-40G-SR4-AR-ST belong to?

The QSFP-40G-SR4-AR-ST is categorized as a QSFP plus 40GBASE-SR4 fiber transceiver module. This identifies it as a QSFP plus form factor device intended for 40GBASE-SR4 style applications. The QSFP plus classification ensures it is considered alongside other QSFP plus transceivers when planning port usage and transceiver stocking.

How does the model number QSFP-40G-SR4-AR-ST help procurement teams?

The model identifier QSFP-40G-SR4-AR-ST provides a precise reference for purchasing and inventory management. It ties directly to a QSFP plus fiber transceiver module that is compatible with Arista Networks QSFP-40G-SR4, helping teams avoid confusion with other 40G modules and maintain accurate records across multiple locations.

What kind of cabling environment is implied by the product category?

The category describes this product as a QSFP plus 40GBASE-SR4 fiber transceiver module, indicating it is intended for fiber based connectivity rather than copper. While no fiber type or distances are specified in the provided data, the categorization confirms that the module is designed for fiber transceiver use in 40G contexts.

QSFP-40G-SR4-AR-ST - StarTech QSFP-40G-SR4-AR-ST Arista compatible module

Name: StarTech QSFP-40G-SR4-AR-ST Arista compatible module
Brand: StarTech
SKU: QSFP-40G-SR4-AR-ST
Price: 135 USD
Availability: InStock

QSFP-40G-SR4-AR-ST - StarTech QSFP-40G-SR4-AR-ST Arista compatible module | US IT Hardware

Product overview

The StarTech QSFP-40G-SR4-AR-ST is a QSFP plus fiber transceiver module designed to be compatible with Arista Networks QSFP-40G-SR4. This module is positioned for environments that require alignment with Arista specifications and transceiver form factors. As a QSFP plus device, it fits deployments standardizing on this pluggable interface for 40G connectivity needs. The Arista compatibility focus makes it suitable for organizations that operate Arista switching platforms and prefer transceivers engineered specifically for those systems. By matching the QSFP-40G-SR4 designation, this module helps procurement teams maintain consistent part references across sites. The StarTech branding provides a clear vendor identity while the QSFP-40G-SR4-AR-ST model identifier supports accurate asset tracking and documentation in managed network environments.

StarTech QSFP plus fiber transceiver module
Model QSFP-40G-SR4-AR-ST for clear identification
Arista Networks QSFP-40G-SR4 compatibility focus
Categorized as 40GBASE-SR4 application class
Designed for QSFP plus based network hardware
Supports standardized 40G transceiver part mapping

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

Connection Type
Manufacturer part #	QSFP-40G-SR4-AR-ST
Brand	StarTech
Condition	New
Model	QSFP-40G-SR4-AR-ST
Cable Type	Multimode fiber
Technology	Optical fiber transceiver
Wavelength	850 nm
Form Factor	Plug-in module
Product Line	Arista QSFP-40G-SR4 Compatible QSFP+ Module
Product Type	Fiber transceiver module
Hot Swappable	Yes

Best for

Arista based networks
Suitable for infrastructures that require an Arista Networks QSFP-40G-SR4 compatible fiber transceiver module, aligning with Arista labeled optics in the environment.
QSFP plus environments
Fits networks standardized on QSFP plus form factor transceivers for 40G connectivity, where matching the QSFP-40G-SR4-AR-ST model simplifies hardware selection.
Standardized SKUs
Helps organizations that rely on consistent part numbers, using the QSFP-40G-SR4-AR-ST identifier alongside Arista QSFP-40G-SR4 references in procurement and asset records.

Frequently asked questions

What is the main purpose of the StarTech QSFP-40G-SR4-AR-ST module?

The QSFP-40G-SR4-AR-ST is a QSFP plus fiber transceiver module intended for use where compatibility with Arista Networks QSFP-40G-SR4 optics is required. It belongs to the 40GBASE-SR4 fiber transceiver module category, aligning it with 40G deployments that specify this application class and QSFP plus form factor in their designs.

Details

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Compatible Brand	Arista Networks QSFP-40G-SR4

Transceiver Type	QSFP+

Application / Use	40GBASE-SR4 40 GbE multimode fiber optic transceiver for 40 GbE network connections up to 150 m

Receiver Overload	2.4 dBm (per lane)

Compliant Standards	40GBASE-SR4

Supported Protocols	40GBASE-SR4 40 Gigabit Ethernet over multimode fiber

Bit Error Rate (BER)	1E-12 or better

Fiber Mode Supported	Multi-mode

Supported Fiber Type	OM3 and OM4 multimode fiber

Data Rate Per Channel	10.3125 Gbps per channel

Number of Optical Lanes	4 transmit and 4 receive lanes

Compatibility (Detailed)	Arista Networks QSFP-40G-SR4 compatible

Total Number of Channels	4 channels

Maximum Distance Over OM3	100 m over OM3 multimode fiber

Maximum Distance Over OM4	150 m over OM4 multimode fiber

Maximum Transfer Distance	150 m

Minimum Receiver Sensitivity	-9.5 dBm (per lane)

Transmitter Extinction Ratio	≥ 3 dB

Maximum Transfer Distance (feet)	492 ft

Transmitter Average Launch Power	-7.5 to 2.3 dBm (per lane)

Digital Diagnostics Monitoring (DDM / DOM)	Yes, supports Digital Diagnostics Monitoring

Maximum Data Transfer Rate	40 Gbps

Supply Voltage	3.3 V DC
Maximum Power Consumption	1.5 W (maximum)
Typical Power Consumption	1.2 W (typical)

Networking Ports & Interfaces

Interface	QSFP+
Port Type	QSFP+ 40 GbE
Connector Type	MPO connector
Data Link Protocol	40 Gigabit Ethernet
Network Technology	40GBASE-SR4
LED / Status Indicators	Link and activity status provided via host switch/router QSFP+ port indicators
Device Interface Standard	QSFP+ MSA compliant electrical interface
Fiber Connector Interface	12-fiber MPO multimode connector

StarTech QSFP-40G-SR4-AR-ST Arista compatible module