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Rectangular silver QSFP28 transceiver module with duplex LC ports

Adafruit

Adafruit 100GBASE-CWDM4 QSFP28 Optical Transceiver Module 2 in 1 accessory

SKU CH-DD1X-K28PR

A 100 Gbps QSFP28 transceiver operating at 1310 nm over duplex single-mode fibre for 2 km links, with 3.5 W max draw and digital optical monitoring

  • 100G QSFP28 transceiver supports 2km reach over single-mode fibre
  • 5W maximum power draw extends module service life
  • Real-time digital optical monitoring enables strong diagnostics
  • Hot-pluggable QSFP28 MSA design simplifies maintenance and uptime
  • Operates reliably across 0 to 70°C commercial temperature range

100GBASE-CWDM4 QSFP28 transceiver module

This 100GBASE-CWDM4 QSFP28 optical transceiver delivers 100 Gbps connectivity over single-mode fibre. It targets network engineers upgrading data-centre links or campus backbones. The module operates across a commercial temperature range of 0 to 70 °C (32 to 158 °F) for stable indoor deployment.

2 km reach at 1310 nm over duplex LC

The transceiver uses CWDM4 wavelengths at 1310 nm to achieve a 2 km link distance on standard duplex LC single-mode fibre. Maximum power draw is 3.5 W, and the electrical interface complies with IEEE 802.3bm 100GBASE-IR4. Built-in digital optical monitoring provides real-time diagnostics for link health.

Hot-pluggable QSFP28 MSA form factor

The hot-pluggable QSFP28 MSA design allows insertion or removal without powering down the switch. RoHS-6 compliance simplifies procurement for regulated environments. EEPROM coding is validated in a compatibility lab for Cisco QSFP-100G-CWDM4-S and QSFP-100G-SM-SR platforms. The module also supports 100G to 4x25G breakout configurations, freeing up ports for flexible aggregation.

Highlights

  • 100G QSFP28 transceiver supports 2km reach over single-mode fibre
  • 5W maximum power draw extends module service life
  • Real-time digital optical monitoring enables strong diagnostics
  • Hot-pluggable QSFP28 MSA design simplifies maintenance and uptime
  • Operates reliably across 0 to 70°C commercial temperature range

Specifications

No published specifications for this item yet.

Questions about this item

What does the 100GBASE-CWDM4 rating mean for actual throughput in a switch?

The module delivers 100 Gb/s over four 25 Gb/s CWDM lanes on single-mode fibre, reaching 2 km at 1310 nm.

Which electrical and optical standards cap the QSFP28 interface on this transceiver?

It complies with IEEE 802.3bm 100GBASE-IR4 and the QSFP28 MSA, limiting lane speed to 25 Gb/s and link distance to 2 km.

What physical slot and fibre connector does the module need to install?

It plugs into a standard QSFP28 cage and uses a duplex LC connector on single-mode fibre.

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