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Rectangular metal QSFP+ transceiver module with MPO port and label

STARTECH

STARTECH QSFP40SR4ST 40GBASE-SR4 QSFP+ Transceiver 150m 850nm

SKU CH-S3SS-SYJ9D MPN QSFP40SR4ST

A 40GBASE-SR4 QSFP+ transceiver delivering 40 Gbps over multimode fiber up to 150 m with an MPO connector

  • Port count1 - MPO
  • Product typeTransceiver
  • Supported standardsIEEE 802.3ba 40GBASE-SR4
  • Optical wavelength850 nm
  • Fiber modeMulti-mode Optical Fiber
  • Maximum range150m (492 ft)
  • 40 Gbps throughput for high-density networks via IEEE 802.3ba 40GBASE-SR4 standard
  • 150 metre reach over multimode fibre using 850 nm wavelength and MPO connector
  • MSA compliant design ensures interoperability with multi-vendor equipment
  • Hot-swappable module allows service without network downtime
  • Low power draw under 0.7 W reduces operational energy costs

40GBASE-SR4 QSFP+ transceiver for 150 m multimode

This module delivers 40 Gbps over multi-mode optical fiber using an MPO connector. It suits data-centre operators and network engineers who need compliant 40GBASE-SR4 links up to 150 m.

Practical limits of the 40GBASE-SR4 standard

The IEEE 802.3ba specification defines a maximum reach of 150 m on OM3 or OM4 multi-mode fiber at 850 nm. Signal loss beyond that distance will exceed the standard budget and cause link errors.

What to verify before ordering

Confirm your switch or router accepts QSFP+ modules and has an MPO port for multi-mode fiber. Check that the operating environment stays within 0 to 70 °C and 5 to 95 % relative humidity. Ensure the fiber patch cables are OM3 or OM4 with MPO connectors.

How it compares

Measured against everything we stock in SFP & SFP+ Transceiver Modules, at today’s prices. Recalculated every night.

Price $294.99
Pricier than about 71% of the 1,471 comparable items (median $138.99).

Specifications

Product
Brand nameStarTech.com
Model nameQSFP40SR4ST
Product typeTransceiver
Connectivity
Supported standardsIEEE 802.3ba 40GBASE-SR4
Optical wavelength850 nm
Fiber modeMulti-mode Optical Fiber
Maximum range150m (492 ft)
Ports & slots
Port count1 - MPO
Size & build
Shipping weight0.06 kg
Package size114 × 89 × 33 mm
In the box
In the box1 x QSFP+ transceiver
Environment & compliance
Temperature rangeOperating Temperature: 0 to 70 degree Celsius (32 to 158 degree Fahrenheit)
Storage Temperature: -40 to 85 degree Celsius (-40 to 185 degree Fahrenheit)
Humidity range5 to 95% RH

Questions about this item

Which version should I choose for a 40GBASE-SR4 link over multimode fiber?

This module implements IEEE 802.3ba 40GBASE-SR4 at 850nm with an MPO connector, rated for 150 metres on multimode fibre and MSA compliant.

What does the 40 Gbps rating mean once the transceiver is installed?

It delivers a 40 Gbps aggregate link over a single MPO multimode connection at 850nm, with a maximum reach of 150 metres.

How does the MPO interface and MSA compliance cap real-world use?

The MPO port and MSA compliance ensure interoperability with other 40GBASE-SR4 gear, while the 850nm multimode design limits reach to 150 metres.

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