TE Connectivity 103977-2 Rectangular Connector Equivalent & Substitute Parts

Part Overview

The TE Connectivity 103977-2 is a 3-position rectangular receptacle connector from the AMPMODU MTE series, designed for discrete wire termination using insulation displacement contact (IDC) technology. This connector accommodates 26-30 AWG wire gauges and features tin-lead contact plating. The part is currently active in production with 790 units in stock.

Substitute parts are identified when equivalent functional performance can be achieved through alternative connector models that maintain compatibility with the primary application parameters: connector type, number of positions, pitch spacing, mounting configuration, and termination method.

Substiute Parts

103977-2

TE Connectivity AMP ConnectorsIn Stock: 846103977-2 Datasheet

Current PartRFQ

5-103976-2

TE Connectivity AMP ConnectorsIn Stock: 20225-103976-2 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the TE Connectivity 103977-2 is determined by the following core parameters:

Primary Compatibility Criteria:

• Connector type must be receptacle
• Number of positions must be 3
• Pitch must be 0.100" (2.54mm)
• Mounting type must be free hanging (in-line)
• Cable termination method must be IDC
• Contact type must be female socket
• Series must be AMPMODU MTE

Secondary Variation Parameters:

• Wire gauge range (26-30 AWG for main part; 22-26 AWG for substitute)
• Contact finish material (tin-lead versus gold)
• Wire type (discrete versus ribbon cable)
• Contact finish thickness
• RoHS compliance status

The substitute part 5-103976-2 maintains all primary compatibility criteria while introducing variations in wire gauge accommodation, contact finish specification, and wire type configuration. These secondary variations do not prevent functional substitution when application requirements align with the substitute part's electrical and mechanical specifications.

Parameter Comparison

Engineering Selection Recommendations

103977-2 Selection Criteria:

• Applications requiring discrete wire termination with 26-30 AWG wire gauges
• Systems where tin-lead contact finish is specified or required
• Designs not subject to RoHS compliance mandates
• Applications with established qualification to tin-lead plating specifications

5-103976-2 Selection Criteria:

• Applications requiring RoHS-compliant components
• Systems utilizing ribbon cable termination with 22-26 AWG wire gauges
• Designs where gold contact finish provides enhanced corrosion resistance
• Applications subject to REACH compliance requirements
• Closed-end connector configurations

Both parts maintain active production status and identical mechanical compatibility within the AMPMODU MTE series. Selection between these alternatives depends on wire gauge requirements, termination method (discrete versus ribbon), contact finish specification, and regulatory compliance mandates applicable to the end application.

Frequently Asked Questions (FAQ)

Q: Can the 5-103976-2 substitute for the 103977-2 in all applications?

A: Substitution is valid only when the application wire gauge falls within the 22-26 AWG range supported by the 5-103976-2. The 103977-2 supports 26-30 AWG wire, creating an overlap at 26 AWG. Applications using 27-30 AWG wire cannot use the 5-103976-2. Additionally, the 5-103976-2 is configured for ribbon cable termination, while the 103977-2 is designed for discrete wire termination.

Q: What is the significance of the contact finish difference between these parts?

A: The 103977-2 features tin-lead plating at 100.0µin thickness, while the 5-103976-2 uses gold plating at 30.0µin thickness. Gold provides superior corrosion resistance and is preferred in high-reliability applications. Tin-lead is suitable for standard industrial applications. Contact finish selection affects long-term reliability in corrosive environments and must align with application requirements.

Q: Are there RoHS compliance implications when selecting between these parts?

A: Yes. The 103977-2 is RoHS non-compliant with vendor-undefined REACH status. The 5-103976-2 is RoHS compliant and REACH unaffected. Applications subject to RoHS directives or REACH regulations must use the 5-103976-2. Applications without regulatory constraints may use either part based on technical requirements.

Q: What does the closed-end feature on the 5-103976-2 mean?

A: The closed-end configuration on the 5-103976-2 provides a sealed connector end, offering protection against contamination and accidental contact. The 103977-2 does not specify this feature. Closed-end design is beneficial in harsh environments or applications requiring enhanced safety.

Q: Can these connectors be used interchangeably with different wire gauges?

A: No. The 103977-2 is rated for 26-30 AWG wire only. The 5-103976-2 is rated for 22-26 AWG wire only. Using wire outside the specified gauge range results in improper contact engagement and connection failure. Wire gauge selection must match the connector specification exactly.

Q: Are both parts available in the same packaging format?

A: Yes. Both the 103977-2 and 5-103976-2 are supplied in tube packaging. Inventory availability differs: 103977-2 has 790 units in stock, while 5-103976-2 has 1928 units in stock.

Q: What is the pitch specification and why does it matter?

A: Both connectors feature 0.100" (2.54mm) pitch, which defines the center-to-center spacing between contact positions. This pitch is standardized within the AMPMODU MTE series and ensures mechanical and electrical compatibility with mating connectors designed for this spacing. Pitch is a non-negotiable parameter for connector interchangeability.