MU20-110/32DFK Quick Connect Female Crimp Connector

Part Overview

The MU20-110/32DFK is a 0.110" (2.79mm) Quick Connect Female Crimp Connector manufactured by 3M as part of the Scotchlok™ series. This non-insulated terminal is designed for 20-26 AWG wire applications with a butted seam construction and tin-plated brass contacts. The part is currently listed as obsolete, necessitating identification of active substitute components to maintain design continuity and ensure supply chain availability for new production and field service applications.

Substiute Parts

MU20-110/32DFK

3MIn Stock: 913MU20-110/32DFK Datasheet

Current PartRFQ

MU20-110/32DFK-A

3MIn Stock: 3856MU20-110/32DFK-A Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The MU20-110/32DFK has been identified with one direct substitute: MU20-110/32DFK-A. Substitution eligibility is determined by the following critical parameters that must remain constant:

• Tab Width: 0.110" (2.79mm) — ensures mechanical fit with mating connectors
• Tab Thickness: 0.032" (0.81mm) — maintains electrical contact integrity
• Gender: Female — preserves connector polarity and mating compatibility
• Termination Method: Crimp — ensures compatibility with existing assembly equipment
• Contact Material and Finish: Brass with Tin plating — maintains electrical performance and corrosion resistance
• Series: Scotchlok™ — confirms product family compatibility

The substitute part MU20-110/32DFK-A operates within a narrower wire gauge range (22-26 AWG versus 20-26 AWG) and has an active product status, making it suitable for applications within the overlapping wire gauge specification.

Parameter Comparison

Engineering Selection Recommendations

The MU20-110/32DFK-A is the designated substitute for the obsolete MU20-110/32DFK. Selection of the substitute part is supported by the following factors:

• Active product status ensures ongoing availability and manufacturing support
• ROHS3 compliance of the substitute part meets current environmental and regulatory requirements
• Identical mechanical parameters (tab width, tab thickness, gender, mounting type) guarantee physical and electrical compatibility
• Wire gauge overlap (22-26 AWG) covers the upper range of the original specification

For applications requiring 20-21 AWG wire termination, the original MU20-110/32DFK specification cannot be fulfilled by MU20-110/32DFK-A. In such cases, alternative connector solutions outside the Scotchlok™ MU20 series must be evaluated.

Frequently Asked Questions (FAQ)

Q: Can MU20-110/32DFK-A be used as a direct replacement for MU20-110/32DFK?

A: MU20-110/32DFK-A is a direct substitute for applications using 22-26 AWG wire. The critical mechanical parameters—tab width (0.110"), tab thickness (0.032"), gender (female), and termination method (crimp)—are identical. The substitute part has an active product status and ROHS3 compliance, making it suitable for new designs and production.

Q: What is the wire gauge limitation when substituting?

A: The original MU20-110/32DFK supports 20-26 AWG wire. The substitute MU20-110/32DFK-A supports 22-26 AWG wire. Applications requiring 20-21 AWG termination cannot use the substitute part.

Q: Are there packaging differences between the main part and substitute?

A: The original part packaging is not specified. The substitute part MU20-110/32DFK-A is supplied in bulk packaging.

Q: Does the overall length difference affect compatibility?

A: The substitute part has a slightly longer overall length (0.500" versus 0.480"). This 0.020" (0.51mm) difference is within typical mechanical tolerances for quick-connect terminal applications and does not affect mating compatibility or electrical performance.

Q: Are both parts compliant with environmental regulations?

A: Both parts have REACH Unaffected status and MSL 1 (Unlimited) moisture sensitivity rating. The substitute part additionally carries ROHS3 compliance, meeting current environmental standards for new production applications.