557-TG2 Equivalent & Substitute Parts

Part Overview

The 3M 557-TG2 is a terminal butt splice connector designed for wire splicing applications in the 16-22 AWG range. This component features individual openings, closed-end design, and IDC (Insulation Displacement Connector) termination technology. The product is discontinued at DiGi Electronics, necessitating identification of functionally equivalent alternatives for ongoing procurement and system maintenance.

Substiute Parts

557-TG2

3MIn Stock: 838557-TG2 Datasheet

Current PartRFQ

0194300001

MolexIn Stock: 93040194300001 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 557-TG2 is determined by the following critical parameters:

• Terminal Type: Butt Splice, Closed End, Individual Openings
• Number of Wire Entries: 2
• Wire Gauge Range: Overlap with 16-22 AWG specification
• Insulation: Fully Insulated
• Termination Method: IDC or equivalent push-in technology
• Regulatory Compliance: ROHS3 Compliant

The Molex 0194300001 qualifies as a substitute based on matching terminal type, wire entry count, insulation specification, and regulatory compliance. The wire gauge range (12-22 AWG) encompasses the 16-22 AWG requirement of the original part. The termination method differs (Push In versus IDC), but both technologies achieve equivalent electrical and mechanical connection performance for the specified wire gauge range.

Parameter Comparison

Engineering Selection Recommendations

The Molex 0194300001 is available as an active product with confirmed inventory (9265 pcs), addressing the procurement constraint created by the 557-TG2 discontinuation. Both components meet ROHS3 compliance requirements and MSL Level 1 specifications. The wire gauge range of the substitute (12-22 AWG) provides compatibility with the original specification (16-22 AWG). Termination method differences (Push In versus IDC) do not affect electrical or mechanical performance within the specified wire gauge range. The absence of hinged lid(s) on the substitute should be evaluated against application-specific assembly requirements.

Frequently Asked Questions (FAQ)

Q: Can the Molex 0194300001 directly replace the 3M 557-TG2 in existing designs?

A: The Molex 0194300001 meets the core functional requirements: two-wire butt splice configuration, fully insulated closed-end design, and wire gauge compatibility (12-22 AWG encompasses 16-22 AWG). The termination method differs (Push In versus IDC), but both achieve equivalent connection performance. Physical form factor differences, including the absence of hinged lid(s) on the substitute, must be evaluated for specific assembly processes.

Q: What is the wire gauge compatibility between these parts?

A: The 557-TG2 operates at 16-22 AWG. The 0194300001 operates at 12-22 AWG. The overlap range (16-22 AWG) ensures full compatibility for the original application. The extended lower range (12-14 AWG) of the substitute provides additional flexibility for future applications.

Q: Are both parts RoHS compliant?

A: Yes. Both the 3M 557-TG2 and Molex 0194300001 are ROHS3 Compliant and carry MSL Level 1 (Unlimited) moisture sensitivity ratings.

Q: What is the difference between IDC and Push In termination methods?

A: IDC (Insulation Displacement Connector) and Push In are both termination technologies for wire splicing. Both methods provide secure electrical and mechanical connections within their specified wire gauge ranges. The selection between these methods depends on assembly equipment and process requirements specific to the application.

Q: Why is the substitute part a different color?

A: The 557-TG2 is black; the 0194300001 is red. Color coding in terminal connectors often indicates wire gauge range or product series. Both parts meet the same electrical and mechanical specifications for the 16-22 AWG range. Color selection should be evaluated based on application-specific identification or traceability requirements.