Molex 1111121681 SFP+ Ganged Cage Connector – Equivalent & Substitute Parts

Part Overview

The Molex 1111121681 is a Position SFP+ Cage with ganged (1 x 6) configuration and integrated heat sink, designed for press-fit termination in high-density optical transceiver applications. This component features a light pipe and operates within the 111112 series connector family.

The 1111121681 carries an Obsolete product status, indicating it is no longer in active production or supported by the manufacturer. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing system maintenance and new production builds.

Substiute Parts

1111121681

MolexIn Stock: 9681111121681 Datasheet

Current PartRFQ

1111128681

MolexIn Stock: 11881111128681 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the Molex 1111121681 is determined by strict alignment across the following critical parameters:

Mandatory Matching Parameters:

• Connector Type: SFP+
• Connector Style: Cage, Ganged (1 x 6) with Heat Sink
• Termination Method: Press-Fit
• Features: Light Pipe
• Base Product Series: 111112

The substitute part Molex 1111128681 satisfies all mandatory matching parameters. Both components share identical functional specifications within the 111112 series, ensuring mechanical and electrical compatibility in applications designed for the original part. The primary distinction is product status: the 1111121681 is Obsolete, while the 1111128681 is Active and maintains current manufacturing support.

Parameter Comparison

Engineering Selection Recommendations

For New Designs and Production: The Molex 1111128681 is the appropriate selection for all new applications. This part maintains Active product status with full manufacturer support, current production availability, and valid export classification (EAR99). It carries identical functional and mechanical specifications to the original 1111121681, ensuring direct compatibility with existing PCB layouts and assembly processes.

For Legacy System Support: The Molex 1111128681 serves as the direct functional replacement for the Obsolete 1111121681 in maintenance, repair, and field upgrade scenarios. Both parts conform to RoHS3 compliance requirements and share identical connector architecture within the 111112 series.

Compliance Considerations: Both parts maintain RoHS3 compliance and Not Applicable moisture sensitivity classification. The 1111128681 carries active ECCN classification (EAR99), whereas the 1111121681 is marked OBSOLETE. For applications subject to export control or regulatory documentation requirements, the 1111128681 provides current compliance status.

Frequently Asked Questions (FAQ)

Q: Can the Molex 1111128681 be used as a direct replacement for the 1111121681 in existing designs?

A: Yes. Both parts share identical specifications for connector type (SFP+), connector style (Cage, Ganged 1 x 6 with Heat Sink), termination method (Press-Fit), and features (Light Pipe). They are mechanically and electrically interchangeable within the 111112 series.

Q: Why is the 1111121681 marked as Obsolete?

A: Obsolete status indicates the part is no longer manufactured or supported by Molex. The 1111128681 represents the current active equivalent within the same product family.

Q: Are there any differences in RoHS compliance between these parts?

A: No. Both the 1111121681 and 1111128681 are RoHS3 Compliant and carry identical moisture sensitivity classification (Not Applicable).

Q: What is the significance of the ECCN classification difference?

A: The 1111121681 carries an OBSOLETE ECCN marking, while the 1111128681 is classified as EAR99. For current production and export documentation, the 1111128681 provides valid, active export classification status.

Q: Are the press-fit termination specifications identical between both parts?

A: Yes. Both parts utilize press-fit termination and are designed for the same PCB pad configurations and assembly processes within the 111112 series.

Q: Is inventory availability a factor in part selection?

A: Inventory levels reflect current stock status. The 1111128681 maintains higher active inventory (1108 Pcs) with ongoing production support, whereas the 1111121681 (870 Pcs) is no longer manufactured. For long-term supply chain planning, the 1111128681 is the recommended selection.