MODM-A-04-8P8C-E-S Equivalent & Substitute Parts

Part Overview

The MODM-A-04-8P8C-E-S is a Jack Modular Connector (8p8c/RJ45 Ethernet) manufactured by Samtec Inc., featuring 90° right-angle orientation with shielding for Cat3 applications. This connector is classified as obsolete, making equivalent substitute parts necessary for ongoing design support, maintenance, and production continuity. The part is designed for through-hole mounting with solder termination and includes board lock features for secure PCB integration.

Key Parameters

Parameter	Value
Connector Type	Jack
Contact Configuration	8p8c (RJ45, Ethernet)
Number of Ports	4
Orientation	90° Angle (Right)
Mounting Type	Through Hole
Termination Method	Solder
Shielding	Shielded
Tab Direction	Down
Contact Material	Phosphor Bronze
Contact Finish	Gold
Housing Material	Polybutylene Terephthalate (PBT), Glass Filled
Operating Temperature Range	-25°C ~ 90°C
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the MODM-A-04-8P8C-E-S are identified based on strict electrical and mechanical parameter alignment. The primary substitution criteria are:

Connector Type: Jack configuration
Contact Configuration: 8p8c (RJ45, Ethernet) standard
Number of Ports: 4 ports
Orientation: 90° right-angle mounting
Mounting Type: Through hole PCB integration
Termination: Solder connection method
Shielding: Electromagnetic shielding requirement
Tab Direction: Down orientation
Contact Finish: Gold plating

Substitute parts are grouped into two categories based on product status and compliance:

Category A - Active Status with Enhanced Compliance: Parts with active product status and ROHS3 compliance, suitable for new designs and long-term production support.

Category B - Active Status with Legacy Compliance: Parts with active product status but RoHS non-compliant status, applicable for legacy system maintenance and replacement scenarios.

Parameter Comparison

Parameter	MODM-A-04-8P8C-E-S (Main)	5406278-3	SS-718804S-A-NF	SS-728804SFR1-A-NF	74839-3043	74838-3042
Manufacturer	Samtec Inc.	TE Connectivity AMP	Stewart Connector	Stewart Connector	Amphenol ICC (FCI)	Amphenol ICC (FCI)
Connector Type	Jack	Jack	Jack	Jack	Jack	Jack
Contact Configuration	8p8c (RJ45)	8p8c (RJ45)	8p8c (RJ45)	8p8c (RJ45)	8p8c (RJ45)	8p8c (RJ45)
Number of Ports	4	4	4	4	4	4
Orientation	90° Right	90° Right	90° Right	90° Right	90° Right	90° Right
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Termination	Solder	Solder	Solder	Solder	Solder	Solder
Shielding	Shielded	Shielded, EMI Finger	Shielded	Shielded	Shielded, EMI Finger	Shielded
Tab Direction	Down	Down	Down	Down	Down	Down
Contact Material	Phosphor Bronze	Phosphor Bronze	Copper Alloy	Copper Alloy	Copper Alloy	Copper Alloy
Contact Finish	Gold	Gold	Gold	Gold	Gold	Gold
Contact Finish Thickness	50.0µin (1.27µm)	50.0µin (1.27µm)	30.0µin (0.76µm)	30.0µin (0.76µm)	30.0µin (0.76µm)	30.0µin (0.76µm)
Housing Material	PBT, Glass Filled	Polyamide (PA), Nylon	Thermoplastic	Thermoplastic	Thermoplastic	Thermoplastic
Operating Temperature	-25°C ~ 90°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	Not Specified	Not Specified
Product Status	Obsolete	Active	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	RoHS Compliant	ROHS3 Compliant	ROHS3 Compliant	RoHS Non-compliant	RoHS Non-compliant

Engineering Selection Recommendations

Primary Substitutes (Active Status, ROHS3 Compliant):

The 5406278-3 (TE Connectivity AMP Connectors) and SS-718804S-A-NF (Stewart Connector) are the preferred substitutes for new designs and production environments requiring current compliance certifications. Both parts maintain active product status with ROHS3 compliance and REACH unaffected status. The 5406278-3 offers Cat5 rating with EMI finger shielding, while SS-718804S-A-NF provides Cat5e rating. Both support the full operating temperature range of -40°C to 85°C.

The SS-728804SFR1-A-NF (Stewart Connector, Series 72) provides an alternative with integrated filter features and board guide functionality, maintaining ROHS3 compliance and active product status. This variant is suitable for applications requiring additional EMI filtering.

Secondary Substitutes (Active Status, RoHS Non-compliant):

The 74839-3043 and 74838-3042 (Amphenol ICC/FCI) are active products suitable for legacy system maintenance and replacement where RoHS compliance is not a requirement. Both maintain the core 8p8c RJ45 jack configuration with 90° right-angle orientation and through-hole solder termination. The 74839-3043 includes EMI finger shielding and board guide features, while 74838-3042 includes board lock features matching the original part.

Compliance Considerations:

For applications subject to RoHS3 and REACH compliance requirements, selection should be limited to 5406278-3, SS-718804S-A-NF, SS-718804S-A-PG3-BA-A283, SS-718804S-A-PG4-BA, or SS-728804SFR1-A-NF. Legacy systems not subject to these requirements may utilize Amphenol ICC/FCI alternatives.

Frequently Asked Questions (FAQ)

Q: Can the MODM-A-04-8P8C-E-S be directly replaced with any of these substitutes?

A: Yes, all listed substitutes share the core electrical and mechanical parameters: 8p8c RJ45 jack configuration, 90° right-angle orientation, through-hole solder termination, 4-port design, and shielded construction. Physical PCB footprint compatibility should be verified during design integration.

Q: What is the difference between Cat3, Cat5, and Cat5e ratings?

A: The original MODM-A-04-8P8C-E-S is rated for Cat3 applications. Substitute parts rated Cat5 or Cat5e provide enhanced bandwidth and performance specifications. Cat5e substitutes (SS-718804S-A-NF variants) are backward compatible with Cat3 applications and offer superior performance margins.

Q: Are there differences in contact material between the main part and substitutes?

A: The original part uses Phosphor Bronze contacts, while most substitutes use Copper Alloy contacts. Both materials provide equivalent electrical performance for RJ45 Ethernet applications. Contact finish (gold plating) is consistent across all parts, though thickness varies from 30.0µin to 50.0µin.

Q: Which substitute is best for new product designs?

A: For new designs, select from parts with active product status and ROHS3 compliance: 5406278-3, SS-718804S-A-NF, or SS-728804SFR1-A-NF. These ensure long-term supply availability and regulatory compliance. The 5406278-3 offers the closest electrical specification match with Cat5 rating and EMI finger shielding.

Q: What is the significance of EMI finger shielding?

A: EMI finger shielding provides enhanced electromagnetic interference protection through additional contact fingers. Parts with this feature (5406278-3, 74839-3043, 74839-0043, and Stewart Connector variants with PG3/PG4 designations) offer improved signal integrity in electrically noisy environments.

Q: Are operating temperature ranges critical for substitution?

A: The original part operates -25°C to 90°C. Most active substitutes operate -40°C to 85°C, providing lower minimum temperature but slightly reduced maximum temperature. For applications within -25°C to 85°C range, all substitutes are functionally equivalent. Applications exceeding 85°C maximum require the original part or custom evaluation.

Q: What packaging options are available?

A: Substitutes are available in Tray and Bulk packaging. Packaging selection depends on production volume and inventory management requirements. All packaging options maintain identical electrical and mechanical specifications.

Q: Can RoHS non-compliant parts be used in new designs?

A: RoHS non-compliant parts (74839-3043, 74838-3042, 74839-0043) are restricted to legacy system maintenance, repair, and replacement scenarios where regulatory compliance is not applicable. New product designs should utilize ROHS3 compliant alternatives.

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