Commercial · MolexUpdated 2026-10-03
2031431355
The base code '203143' identifies the Molex QSFP-DD Interconnect System and Cable Assemblies series. The suffix '1355' specifies the configuration of the QSFP-DD Cage Assembly, which includes features such as 1-by-1, PCI Fin Heat Sink, Spring Fingers, Two Rear Legs, and Press-Fit Pins.
Part number dissection
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203143The base code '203143' identifies the Molex QSFP-DD Interconnect System and Cable Assemblies series.
1355The suffix '1355' specifies the configuration of the QSFP-DD Cage Assembly, which includes features such as 1-by-1, PCI Fin Heat Sink, Spring Fingers, Two Rear Legs, and Press-Fit Pins.
Specifications
Base codeThe base code '203143' identifies the Molex QSFP-DD Interconnect System and Cable Assemblies series.
Finish / variantThe suffix '1355' specifies the configuration of the QSFP-DD Cage Assembly, which includes features such as 1-by-1, PCI Fin Heat Sink, Spring Fingers, Two Rear Legs, and Press-Fit Pins.
Datasheet
Source: MolexView on manufacturer site ↗
Overview
The Molex part 2031431355 is a QSFP-DD 1x1 cage assembly, featuring spring fingers and fin heat sink options. It is specifically designed to function with Quad Small Form-Factor (zQSFP+ & QSFP-DD) transceivers.
Key features
- Material: Cage, spring fingers, and heat sink clip are stainless steel; heat sinks are aluminum with black anodization.
- RoHS Compliance: No RoHS exemptions.
- Mounting: Features press-fit legs 2.44mm long, requiring a minimum PCB thickness of 1.57mm for single-sided use and 2.70mm for belly-to-belly use.
- Design: Closed top with a PCI heat sink.
- Configuration: Includes 2 rear legs per port and does not have a raised base.
Alternates / same series
2031431349PCI heat sink, 0 rear legs, no raised base
2031431350SAN heat sink, 0 rear legs, no raised base
2031431351NET heat sink, 0 rear legs, no raised base
2031431352PCI heat sink, 1 rear leg, no raised base
2031431353SAN heat sink, 1 rear leg, no raised base
2031431354NET heat sink, 1 rear leg, no raised base
2031431356SAN heat sink, 2 rear legs, no raised base
2031431357NET heat sink, 2 rear legs, no raised base
2031432349PCI heat sink, 0 rear legs, with raised base
2031432350SAN heat sink, 0 rear legs, with raised base
2031432351NET heat sink, 0 rear legs, with raised base
2031432352PCI heat sink, 1 rear leg, with raised base
2031432353SAN heat sink, 1 rear leg, with raised base
2031432354NET heat sink, 1 rear leg, with raised base
2031432355PCI heat sink, 2 rear legs, with raised base
2031432356SAN heat sink, 2 rear legs, with raised base
2031432357NET heat sink, 2 rear legs, with raised base
FAQ
What materials are used for the cage, spring fingers, heat sinks, and heat sink clip?
The cage, spring fingers, and heat sink clip are made of stainless steel. The heat sinks are made of aluminum with black anodization.
Is this part RoHS compliant?
Yes, there are no RoHS exemptions for this part.
What is the length of the press-fit legs and the minimum required PCB thickness?
The press-fit legs are 2.44mm long. A minimum PCB thickness of 1.57mm is required for single-sided use, and 2.70mm for belly-to-belly use.
What type of heat sink and number of rear legs does part 2031431355 have?
Part 2031431355 has a PCI heat sink and 2 rear legs per port.
Does part 2031431355 have a raised base?
No, part 2031431355 does not have a raised base.
Availability
Lead timeQuoted on request
TraceabilityFull documentation with every shipment
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BTEK Components MFG LLC · Largo, FloridaPart data compiled and verified by BTEK's sourcing engine.