MODS-A-8P8C-G-S4 Equivalent & Substitute Parts

Part Overview

The MODS-A-8P8C-G-S4 is a modular jack connector manufactured by Samtec Inc., designed for 8p8c (RJ45, Ethernet) applications with 90° right-angle orientation and shielding. This connector features through-hole solder termination, board lock functionality, and EMI finger shielding rated for Cat3 performance. The product is currently obsolete, making equivalent and substitute parts necessary for ongoing system support, maintenance, and new design implementations where Cat3 or higher-rated alternatives are acceptable.

Substiute Parts

MODS-A-8P8C-G-S4

Samtec Inc.In Stock: 964MODS-A-8P8C-G-S4 Datasheet

Current PartRFQ

5555153-1

TE Connectivity AMP ConnectorsIn Stock: 37905555153-1 Datasheet

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7499010122

Würth ElektronikIn Stock: 41347499010122 Datasheet

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A-2004-2-1-LP/FS-N

Assmann WSW ComponentsIn Stock: 835A-2004-2-1-LP/FS-N Datasheet

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A-2004-2-2-LP/FS-N

Assmann WSW ComponentsIn Stock: 948A-2004-2-2-LP/FS-N Datasheet

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A-2004-2-3-LP/FS-N

Assmann WSW ComponentsIn Stock: 1027A-2004-2-3-LP/FS-N Datasheet

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SI-60123-F

Bel Fuse Inc.In Stock: 946SI-60123-F Datasheet

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SS-6488S-A-NF-K1

Stewart ConnectorIn Stock: 806SS-6488S-A-NF-K1 Datasheet

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SS-6488S-A-NF-SB02

Stewart ConnectorIn Stock: 827SS-6488S-A-NF-SB02 Datasheet

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SS-6488S-A-PG1-BA

Stewart ConnectorIn Stock: 1215SS-6488S-A-PG1-BA Datasheet

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SS-7188S-A-NF-1

Stewart ConnectorIn Stock: 709SS-7188S-A-NF-1 Datasheet

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SS-7188S-A-NF-K1

Stewart ConnectorIn Stock: 1144SS-7188S-A-NF-K1 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution for the MODS-A-8P8C-G-S4 is determined by the following critical parameters:

Primary Substitution Criteria:

• Connector Type: Jack
• Number of Positions/Contacts: 8p8c (RJ45, Ethernet)
• Mounting Type: Through Hole
• Orientation: 90° Angle (Right)
• Termination: Solder
• Shielding: Shielded (EMI Finger shielding is preferred but not mandatory for functional equivalence)
• Tab Direction: Down
• Contact Finish: Gold

Secondary Compatibility Parameters:

• Operating Temperature Range: Must support at least -25°C to 90°C or equivalent
• RoHS Compliance: ROHS3 Compliant preferred
• Moisture Sensitivity Level: MSL 1 (Unlimited)

Substitute parts are grouped into two categories:

Category A - Direct Functional Equivalents (8p8c RJ45, 90° Right-Angle, Shielded): These parts maintain identical electrical and mechanical specifications with minor variations in contact finish thickness, housing material, or additional features (board stops, keying).

Category B - Functional Alternatives (RJ45 with Enhanced Features): These parts provide 8p8c RJ45 connectivity with 90° right-angle orientation but include integrated magnetics, LED indicators, or AutoMDIX functionality. These are suitable where the application can accommodate additional features without design modification.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitutes (Direct Equivalence):

The Assmann WSW A-2004 series (A-2004-2-1-LP/FS-N, A-2004-2-2-LP/FS-N, A-2004-2-3-LP/FS-N) and Stewart Connector SS-6488S series (SS-6488S-A-NF-K1, SS-6488S-A-NF-SB02, SS-6488S-A-PG1-BA) provide direct functional equivalence to the MODS-A-8P8C-G-S4. All are active products with ROHS3 compliance, 8p8c RJ45 configuration, 90° right-angle orientation, shielded design, and solder termination. These parts support extended operating temperature ranges (-40°C to 85°C) compared to the original specification, providing improved thermal margin. The SS-6488S-A-PG1-BA variant includes EMI finger shielding matching the original design.

Secondary Substitutes (Functional Compatibility):

The TE Connectivity 5555153-1 is an active product with identical mechanical and electrical specifications, including board lock and panel stops features. The contact finish thickness (50.0µin) exceeds the original specification, providing enhanced durability. Operating temperature range is -40°C to 85°C.

The Bel Fuse SI-60123-F (MagJack® ST SI-60000 series) provides 8p8c RJ45 connectivity with 90° right-angle orientation, shielded design with EMI finger, and integrated magnetics for 10/100 Base-T applications. This part is suitable where integrated magnetics do not conflict with system design.

Not Recommended:

The Würth Elektronik 7499010122 features vertical orientation rather than 90° right-angle, making it unsuitable for direct substitution in applications requiring right-angle mounting. Additionally, the operating temperature range (0°C to 70°C) is narrower than the original specification.

Frequently Asked Questions (FAQ)

Q: Can I use the Assmann WSW A-2004 series as a direct replacement for the MODS-A-8P8C-G-S4?

A: Yes. The A-2004 series maintains identical connector type (Jack), contact configuration (8p8c RJ45), orientation (90° right-angle), termination method (solder), shielding (shielded), and tab direction (down). All variants are ROHS3 compliant with MSL 1 rating. Differences in contact finish thickness (15.0µin, 30.0µin, or 50.0µin) do not affect functional compatibility. The extended operating temperature range (-40°C to 85°C) provides improved thermal performance.

Q: What is the difference between the Stewart Connector SS-6488S variants?

A: The SS-6488S series differs in contact finish thickness and additional features. SS-6488S-A-NF-K1 includes keying and has 30.0µin gold finish. SS-6488S-A-NF-SB02 includes shorting contacts and has 50.0µin gold finish. SS-6488S-A-PG1-BA includes EMI finger shielding (matching the original MODS-A design) with 30.0µin gold finish. All three are mechanically and electrically compatible with the original part.

Q: Is the Bel Fuse SI-60123-F suitable for my application?

A: The SI-60123-F provides 8p8c RJ45 connectivity with 90° right-angle orientation and shielded design with EMI finger. However, this part includes integrated magnetics for 10/100 Base-T applications. Use this part only if your system design accommodates integrated magnetics or if your application requires 10/100 Base-T functionality.

Q: Why is the Würth Elektronik 7499010122 not recommended?

A: The 7499010122 features vertical orientation rather than 90° right-angle mounting. This orientation difference makes it mechanically incompatible with PCB layouts designed for the MODS-A-8P8C-G-S4. Additionally, the operating temperature range (0°C to 70°C) is narrower than the original specification.

Q: What does contact finish thickness mean, and does it affect compatibility?

A: Contact finish thickness refers to the gold plating depth on the connector contacts. The MODS-A-8P8C-G-S4 specifies 15.0µin (0.38µm). Substitute parts offer 15.0µin, 30.0µin, or 50.0µin thickness. Thicker finishes provide enhanced durability and corrosion resistance without affecting electrical or mechanical compatibility. All thicknesses are functionally equivalent for standard applications.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All recommended substitute parts carry ROHS3 compliance certification, matching the original MODS-A-8P8C-G-S4 specification. The TE Connectivity 5555153-1 carries RoHS compliance (not explicitly ROHS3 designated in available data).

Q: Can I mix different substitute parts in the same design?

A: Yes. All recommended substitute parts maintain identical mechanical and electrical specifications for 8p8c RJ45 90° right-angle shielded connectors with solder termination. Mixing parts from different manufacturers or with different contact finish thicknesses does not affect functional compatibility within a single design.