TE Connectivity AMP Connectors 5-557971-3 Equivalent & Substitute Parts

Part Overview

The TE Connectivity AMP Connectors 5-557971-3 is a modular connector plug with 6 positions and 6 contacts (6p6c) in unshielded configuration, compatible with RJ11, RJ12, RJ14, and RJ25 standards. This connector features IDC (Insulation Displacement Contact) termination for flat oval cable applications with stranded wires. The product is classified as obsolete, necessitating identification of active equivalent components to maintain supply chain continuity and support ongoing applications requiring this connector type.

Substiute Parts

5-557971-3

TE Connectivity AMP ConnectorsIn Stock: 11245-557971-3 Datasheet

Current PartRFQ

940-SP-3066

Stewart ConnectorIn Stock: 84691940-SP-3066 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TE Connectivity 5-557971-3 with the Stewart Connector 940-SP-3066 is based on alignment of the following critical parameters:

Matching Parameters:

• Connector type: Both are plug configurations
• Contact count and arrangement: Both feature 6p6c (RJ11, RJ12, RJ14, RJ25) compatibility
• Shielding configuration: Both are unshielded
• Termination technology: Both utilize IDC termination
• Cable compatibility: Both accommodate flat oval cable
• Contact material and finish: Both use phosphor bronze with gold plating at 50.0µin thickness
• Housing material: Both use polycarbonate (PC)
• Moisture sensitivity: Both rated MSL 1 (Unlimited)
• Physical dimensions: Both measure approximately 0.525–0.530 inches in length

The Stewart Connector 940-SP-3066 maintains functional and mechanical equivalence to the obsolete TE Connectivity part while offering active product status and current availability.

Parameter Comparison

Engineering Selection Recommendations

The Stewart Connector 940-SP-3066 serves as the direct functional equivalent for the obsolete TE Connectivity 5-557971-3. Selection of the Stewart Connector part is supported by the following factors:

Product Status: The Stewart Connector 940-SP-3066 maintains active product status with substantial inventory availability (84,667 pieces), ensuring supply chain reliability compared to the obsolete TE Connectivity part.

Compliance and Certifications: The Stewart Connector 940-SP-3066 is ROHS3 compliant and REACH unaffected, meeting current regulatory requirements. The TE Connectivity part carries no applicable RoHS status and undefined REACH status, reflecting its obsolete classification.

Electrical and Mechanical Compatibility: Both connectors share identical contact architecture (6p6c), termination methodology (IDC), contact materials (phosphor bronze with 50.0µin gold plating), and housing composition (polycarbonate). Physical dimensions are equivalent within manufacturing tolerances (0.525" versus 0.530").

Cable Accommodation: The Stewart Connector 940-SP-3066 accommodates both solid and stranded wires in flat oval cable configurations, providing broader compatibility than the TE Connectivity part, which specifies stranded wires only.

Electrical Ratings: The Stewart Connector 940-SP-3066 provides specified electrical ratings (1.5 A at 150V), establishing defined performance parameters for circuit design applications.

Frequently Asked Questions (FAQ)

Q: Can the Stewart Connector 940-SP-3066 directly replace the TE Connectivity 5-557971-3 in existing applications?

A: Yes. Both connectors share identical contact count (6p6c), termination technology (IDC), contact materials and finishes, housing composition, and physical dimensions. The Stewart Connector part maintains functional and mechanical equivalence for RJ11, RJ12, RJ14, and RJ25 applications.

Q: What is the significance of the cable type difference between the two parts?

A: The TE Connectivity 5-557971-3 specifies stranded wires only, while the Stewart Connector 940-SP-3066 accommodates both solid and stranded wires. This difference expands application flexibility for the Stewart Connector part without compromising compatibility with stranded wire configurations.

Q: Are there compliance differences between these connectors?

A: Yes. The Stewart Connector 940-SP-3066 is ROHS3 compliant and REACH unaffected, meeting current regulatory standards. The TE Connectivity 5-557971-3 carries no applicable RoHS status and undefined REACH status due to its obsolete classification. For new designs and applications subject to regulatory compliance requirements, the Stewart Connector part is the appropriate selection.

Q: How do the physical dimensions compare?

A: The Stewart Connector 940-SP-3066 measures 0.525 inches (13.34mm) in length, while the TE Connectivity 5-557971-3 measures 0.530 inches (13.46mm). This 0.005-inch difference falls within standard manufacturing tolerances and does not affect mechanical fit or functional performance in standard modular connector applications.

Q: What electrical ratings apply to these connectors?

A: The Stewart Connector 940-SP-3066 is rated for 1.5 A at 150V. The TE Connectivity 5-557971-3 does not provide specified voltage or current ratings in available documentation. For applications requiring defined electrical performance parameters, the Stewart Connector part provides explicit ratings suitable for circuit design verification.

Q: Does the color difference between the connectors affect functionality?

A: No. The TE Connectivity 5-557971-3 is translucent blue, while the Stewart Connector 940-SP-3066 is translucent clear. Color is a cosmetic characteristic and does not affect electrical performance, mechanical compatibility, or contact integrity.

Q: What is the inventory status for each part?

A: The TE Connectivity 5-557971-3 is obsolete with 1,113 pieces listed as new original stock. The Stewart Connector 940-SP-3066 is active with 84,667 pieces available, providing reliable long-term supply chain access.