TE Connectivity 172781-3 WTB Tin Terminal Connector Equivalent & Substitute Parts

Part Overview

The TE Connectivity 172781-3 is a Wire to Board (WTB) tin terminal connector designed for 26-30 AWG wire gauges within the Mini Amp-In series. This component functions as a crimp terminal for establishing electrical connections between wire conductors and printed circuit board receptacles. The 172781-3 carries an Obsolete product status, necessitating identification of active equivalent components to maintain design continuity and ensure procurement availability for new production runs and field service applications.

Substiute Parts

172781-3

TE Connectivity AMP ConnectorsIn Stock: 150780172781-3 Datasheet

Current PartRFQ

172781-4

TE Connectivity AMP ConnectorsIn Stock: 3300172781-4 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 172781-3 terminal connector is determined by strict equivalence across the following critical parameters:

Wire Gauge Compatibility: Both the main part and substitute must accommodate 26-30 AWG wire conductors to ensure proper crimp force and electrical contact resistance characteristics.

Mechanical Dimensions: Hole diameter (0.047" ~ 0.063"), insulation diameter (0.043" ~ 0.055"), and overall length (0.335") must remain identical to guarantee physical fit within existing connector housings and PCB receptacle patterns.

Contact Material and Finish: Brass construction with tin plating ensures consistent electrical conductivity and corrosion resistance. Substitutes must maintain identical contact material and surface finish specifications.

Terminal Type Classification: Wire to Board terminal designation confirms the component's intended application within the Mini Amp-In series connector system.

Regulatory Compliance: RoHS3 compliance and MSL rating of 1 establish baseline environmental and handling requirements that substitute parts must satisfy.

The 172781-4 satisfies all substitution criteria through identical electrical and mechanical specifications while maintaining active product status and current manufacturing availability.

Parameter Comparison

Engineering Selection Recommendations

The 172781-4 terminal connector serves as the direct substitute for the obsolete 172781-3 component. Selection of the 172781-4 is based on the following engineering criteria:

Electrical and Mechanical Equivalence: All functional parameters including wire gauge range, contact material, contact finish, and dimensional specifications are identical between the two parts. This equivalence ensures direct interchangeability within existing connector assemblies and PCB designs without modification to mating receptacles or wire preparation procedures.

Product Status Transition: The 172781-3 carries Obsolete designation, indicating discontinued manufacturing and limited procurement availability. The 172781-4 maintains Active product status with current manufacturing support and established supply chain availability, ensuring long-term component sourcing for production and field service requirements.

Regulatory Compliance Continuity: Both components maintain ROHS3 compliance and MSL rating of 1, confirming equivalent environmental qualification and handling requirements. No additional compliance documentation or storage condition modifications are required when transitioning from 172781-3 to 172781-4.

Packaging Consistency: Both parts are supplied in Cut Tape (CT) packaging format, maintaining compatibility with existing automated assembly equipment and component handling procedures.

Frequently Asked Questions (FAQ)

Q: Can the 172781-4 be used as a direct replacement for the 172781-3 in existing designs?

A: Yes. The 172781-4 is electrically and mechanically equivalent to the 172781-3 across all specified parameters. No design modifications, PCB layout changes, or connector housing alterations are required for substitution.

Q: What is the primary reason for substituting the 172781-3?

A: The 172781-3 carries Obsolete product status, indicating discontinued manufacturing. The 172781-4 is an Active product with current manufacturing support and established procurement availability.

Q: Are the wire gauge specifications identical between the two parts?

A: Yes. Both the 172781-3 and 172781-4 accommodate 26-30 AWG wire conductors with identical crimp terminal specifications.

Q: Do the dimensional specifications differ between these components?

A: No. Hole diameter, insulation diameter, and overall length specifications are identical. Both parts fit existing connector housings and PCB receptacle patterns without modification.

Q: Are there any differences in contact material or surface finish?

A: No. Both components feature brass construction with tin plating, ensuring identical electrical conductivity and corrosion resistance characteristics.

Q: What is the significance of the MSL rating for these terminals?

A: Both parts carry MSL rating of 1 (Unlimited), indicating no moisture sensitivity restrictions. Standard storage conditions apply without special humidity control requirements.

Q: Are both parts RoHS3 compliant?

A: Yes. Both the 172781-3 and 172781-4 maintain ROHS3 compliance, confirming equivalent environmental qualification for regulated applications.

Q: Does the packaging format differ between these components?

A: No. Both parts are supplied in Cut Tape (CT) packaging, maintaining compatibility with existing automated assembly and component handling systems.