QSFP 100G CWDM4 Module for Single-Mode Links
The QSFP 100G CWDM4 module is a 100G single-mode module for campus, metro-access and data center links up to 2km, listed at 1310nm with coarse wavelength division multiplexing across four lanes. It is the 100G single-mode product page on this site, and its figures belong to this model only.
What this module is listed as
The listed line rate for this module is 103.125 Gbps, carried as four lanes of 25.78125 Gbps, under the 100G CWDM4 MSA Technical Specification Revision 1.0 and IEEE 802.3bm CAUI-4, with an SFF-8636 two-wire management interface. The host system must enable RS-FEC RS (528,514) under IEEE 802.3 clause 91, which is a host requirement rather than a module option, and a buyer whose host cannot enable that forward error correction should raise it in the enquiry before ordering.
The optical figures are listed at 1310nm on single-mode fibre over up to 2km, including channel insertion loss of up to 5 dB. The distance and the loss budget belong together: a link that is within 2km but exceeds the loss budget, for example through many connectors or splices, is not automatically within specification. State the link length and the connector count in the enquiry when the loss budget is tight.
Power and voltage conflict on the source pages - read before ordering
The source pages for this module give two different power and voltage figures, and this page does not choose between them. The specification table states power consumption below 1.5W with a single 3.5V supply, while the feature text states power dissipation below 3.5W with a single 3.3V supply. Those are different figures, not rounding differences, so this page records both and asks buyers to confirm power and supply voltage per model in the enquiry.
A related anomaly is noted for completeness: the specification table lists lasers as MPO, which conflicts with the feature text describing a duplex single-mode LC optical receptacle. This page follows the LC receptacle description as the main statement and flags the table entry as anomalous, because a connector type is not a laser type and the table entry cannot be read literally. Neither anomaly affects the wavelength, distance or rate figures, which are consistent across the source page.
Where this module fits
The listed applications for this module are local area networks, wide area networks, and Ethernet switch and router applications. Those are the applications stated on the source page for this model, and they describe where a 2km single-mode 100G module is normally deployed rather than a promise about any particular network. The operating case temperature is listed as 0 degrees Celsius to 70 degrees Celsius, covering ordinary indoor conditions.
The listed receive sensitivity is minus 10 dBm and the listed transmit power range is minus 2.0 to plus 2.0 dBm, with an extinction ratio of 3.5 dB. Those figures are for this model only and must not be copied to any other 100G module, including the 100G SR4 title on this site, which has no listed specification behind it and therefore no figures published here.
Specification - as listed for this model
| Item | Listed value |
|---|---|
| Model | QSFP-100G-CWDM4-S |
| Line rate | 103.125 Gbps (4 x 25.78125 Gbps) |
| Standards stated | 100G CWDM4 MSA Technical Specification Rev 1.0; IEEE 802.3bm CAUI-4; SFF-8636 management interface; host RS-FEC RS (528,514), IEEE 802.3 clause 91 |
| Wavelength and fibre | 1310nm, single-mode fibre (SMF) |
| Distance | Up to 2km, including channel insertion loss up to 5 dB |
| Optical receptacle | Duplex single-mode LC optical receptacle (feature text). Note: the specification table entry reading Lasers: MPO is anomalous and is not used as a laser or connector statement. |
| Power consumption - source pages disagree | Specification table states below 1.5W; feature text states dissipation below 3.5W. Confirm per model before ordering. |
| Power supply - source pages disagree | Specification table states single 3.5V; feature text states single 3.3V. Confirm per model before ordering. |
| Transmit power | -2.0 to +2.0 dBm |
| Receive sensitivity | -10 dBm |
| Extinction ratio | 3.5 dB |
| Operating case temperature | 0 to 70 degrees Celsius |
Values above are taken from the listed specification for this model only. They are not a range-wide promise. Items not listed here are confirmed per model in the enquiry, and any conflict inside the source pages is flagged on the page rather than resolved by choosing one value.
Enquiry checklist
Before sending an enquiry, note the model or the rate you need, the wavelength, the fibre type, the distance, the connector, the quantity and the application. State whether the module must be compatible with a named host platform, and name any certification document you need. Minimum order quantity and lead time are unavailable at company level and are confirmed per model in the enquiry. Quotations are confirmed per order.
Send an enquiry | Sales contact: Ms. Vicky Tian, Sales Manager, +86 19860146913 | Telephone: 86-0755-82552969 | Email: dsale@topsfp.com
Frequently asked questions
What power does this module draw?
The source pages disagree: the specification table states below 1.5W at 3.5V, while the feature text states below 3.5W at 3.3V. Confirm both figures per model in the enquiry before designing power and cooling around them.
Does my host need to support anything special?
Yes, the host system must enable RS-FEC RS (528,514) under IEEE 802.3 clause 91. If your host cannot enable it, raise that in the enquiry before ordering.
How do I get a quotation?
Send an enquiry naming the model, the rate, the wavelength, the distance and the quantity you need, plus the application. Quotations are confirmed per order, and specifications are confirmed per model before payment. This site does not list fixed selling figures, and no price is shown for any model.
What certification documents can you provide?
The company states ISO 9001, CE, FC, 3C and RoHS names. Certificates are available upon request. If a buyer needs a certificate for a specific model, name the model in the enquiry so the correct document can be checked. No certificate numbers are published on this site.
Do the specifications on one page apply to the whole range?
No. Specifications are shown per model and must not be read across the whole range. Where a value is not listed for a model, the page says to confirm per model rather than filling in a generic figure, and where the source pages disagree, the page flags the conflict instead of choosing one value as fact.
What are the minimum order quantity and lead time?
At company level both are unavailable on this site and are confirmed per model in the enquiry. A single-model note, where one exists, is marked as applying to that model only and must not be read as a company-wide term.