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Small rectangular QSFP+ transceiver module with metal housing and MPO port

AddOn

AddOn QSFP-40G-SR4-S-AO SFP transceiver

SKU CH-DB7R-28TWT MPN QSFP-40G-SR4-S-AO

40 Gbps QSFP+ transceiver for 150 m multi-mode links at 850 nm with MPO connector, DOM and 0–70 °C operating range

  • Brand compatibilityCisco
  • Product typeTransceiver
  • Product weight113.4 g
  • TAA compliance simplifies procurement for government projects
  • 40 Gbps throughput over multi-mode fibre up to 150 m
  • Hot-pluggable QSFP+ form factor enables live module swaps
  • SFF-8436 and RoHS compliance assure interoperability and eco standards
  • Operating range 0 to 70 °C suits standard data-centre environments

AddOn QSFP+ 40GBase-SR4 Transceiver

The AddOn QSFP-40G-SR4-S-AO is a Cisco-compatible QSFP+ transceiver built for 40GBase-SR4 links over multi-mode fibre. It suits network engineers upgrading or repairing Cisco equipment where a TAA-compliant module is required. The unit operates at a commercial temperature range of 0 to 70 Celsius and includes digital optical monitoring.

Installation and common issues

The module is hot-pluggable and uses an MPO connector, so it can be inserted or removed without powering down the switch. Most installation problems come from mismatched fibre polarity or using single-mode cable instead of the specified multi-mode fibre. Dirty or damaged MPO end-faces also cause immediate link failures.

Distance and interface limits

The 850 nm optics are rated for 150 metres on OM3 multi-mode fibre and 100 metres on OM4, so longer runs need a different transceiver. The QSFP+ form factor follows SFF-8436 compliance, limiting use to ports that accept QSFP+ modules. Copper direct-attach cables cannot be used in this optical module.

How it compares

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

Price $591.99
Pricier than about 86% of the 1,471 comparable items (median $138.99).

Specifications

Product
Brand nameAddOn
Model nameCisco QSFP-40G-SR4-S Compatible TAA 40GBase-SR4 QSFP+ Transceiver
Part numberQSFP-40G-SR4-S-AO
Product typeTransceiver
Size & build
Product weight113.4 g
Shipping weight9.30 kg
Package size254 × 229 × 127 mm
Compatibility
Brand compatibilityCisco

Questions about this item

How do I verify the transceiver is operating correctly after installation?

Check the switch port status for a 40G link light and confirm the DOM read-outs show an 850 nm signal within the 0 to 70 °C temperature range.

What ships with the module and what must I supply?

The transceiver itself is included; you must provide a multi-mode MPO patch cable and a Cisco switch port that accepts QSFP+ form-factor modules.

Which version should I choose for a 150-metre run over OM3 fibre?

This 40GBase-SR4 module is rated for 150 m on multi-mode fibre at 850 nm, matching that distance requirement.

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