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Molex 2031431350 — Pluggable Assemblies

Molex 2031431350 QSFP-DD Cage with Heat Sink, Press-Fit

MPN2031431350
Active

Molex 203143 Series QSFP-DD (Double Density) cage with heat sink, press-fit, through hole right angle, EMI shielded, tray.

$19.0700Ref. price · indicative, final on quote
Molex 2031431350 datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

2031431350 specifications
ParameterValue
Series203143
MountingThrough Hole, Right Angle
Connector typeQSFP-DD (Double Density)
PackageTray
FeaturesEMI Shielded
TerminationPress-Fit

Product details

QSFP-DD Cage with Integrated Heat Sink

The Molex 2031431350 is a QSFP-DD (Double Density) cage with an integrated heat sink from the 203143 series. This is the I/O port hardware that accepts a QSFP-DD pluggable module — think of it as the metal housing that sits on the PCB edge, with the heat sink already attached to pull thermal energy off the module. It terminates via press-fit pins through the board, so no soldering is needed on the signal pins, and mounts right-angle through-hole, meaning the cage opening faces the card edge for front-panel cable access. The cage is EMI shielded to contain the high-frequency noise from 200/400 GbE data rates.

Press-Fit Build and Board Layout

The integrated heat sink saves a separate assembly step and ensures the thermal interface is matched to the cage's airflow design. EMI shielding gaskets or fingers on the cage mate with the panel cutout to complete the chassis ground plane.

Frequently asked questions

Is the Molex 2031431350 compatible with QSFP28 modules?

Yes, the QSFP-DD cage is backward-compatible with QSFP28 modules. The Double Density form factor accepts standard QSFP modules in the same port, though the higher data-rate QSFP-DD modules require the extra electrical lanes the cage supports.

Does the 2031431350 come with a heat sink?

Yes, the cage includes an integrated heat sink as part of the assembly — it is not a separate add-on. The heat sink is built into the cage top to pull heat off the plugged-in module.