TE Connectivity 521228-1 Quick Connect Female Crimp Connector Equivalent & Substitute Parts

Part Overview

The TE Connectivity 521228-1 is a 0.110" (2.79mm) Quick Connect Female 18-22 AWG Crimp Connector with full insulation, designed for free-hanging in-line applications. This connector is part of the Ultrapod series and features a brass contact material. The 521228-1 is classified as obsolete, making identification of active equivalent parts essential for ongoing procurement and design continuity.

Key Parameters

Parameter	Value
Tab Width	0.110" (2.79mm)
Tab Thickness	0.020" (0.51mm)
Wire Gauge	18-22 AWG
Insulation Type	Fully Insulated
Mounting Type	Free Hanging (In-Line)
Termination Method	Crimp
Insulation Diameter	0.080" ~ 0.120" (2.03mm ~ 3.05mm)
Contact Material	Brass
Length - Overall	1.180" (29.98mm)
Gender	Female
Terminal Type	Standard

Substitute Part Grouping Explanation

Substitution of the 521228-1 is determined by strict equivalence across the following critical parameters:

Tab Width and Thickness: 0.110" (2.79mm) width and 0.020" (0.51mm) thickness ensure mechanical compatibility with mating connectors
Wire Gauge Compatibility: 18-22 AWG range must be maintained for proper crimp termination and electrical performance
Insulation Specification: Fully insulated construction is required for safety and application requirements
Overall Length: 1.180" (29.98mm) ensures dimensional fit within assemblies
Contact Material: Brass construction maintains electrical and corrosion resistance properties
Mounting Configuration: Free-hanging in-line mounting type must be preserved
Termination Method: Crimp termination is the specified joining technique

The substitute part 521408-2 meets all these critical parameters while offering the advantage of active product status and improved availability.

Parameter Comparison

Parameter	521228-1 (Main Part)	521408-2 (Substitute)	Match Status
Tab Width	0.110" (2.79mm)	0.110" (2.79mm)	Equivalent
Tab Thickness	0.020" (0.51mm)	0.020" (0.51mm)	Equivalent
Wire Gauge	18-22 AWG	18-22 AWG	Equivalent
Insulation Type	Fully Insulated	Fully Insulated	Equivalent
Mounting Type	Free Hanging (In-Line)	Free Hanging (In-Line)	Equivalent
Termination Method	Crimp	Crimp	Equivalent
Insulation Diameter	0.080" ~ 0.120" (2.03mm ~ 3.05mm)	0.080" ~ 0.120" (2.03mm ~ 3.05mm)	Equivalent
Contact Material	Brass	Brass	Equivalent
Length - Overall	1.180" (29.98mm)	1.180" (29.98mm)	Equivalent
Gender	Female	Female	Equivalent
Terminal Type	Standard	Standard	Equivalent
Series	Ultrapod	Ultrapod	Equivalent
Product Status	Obsolete	Active	Upgrade
RoHS Status	RoHS Compliant	ROHS3 Compliant	Enhanced Compliance
Packaging	Not Specified	Cut Tape (CT)	Standard Format

Engineering Selection Recommendations

The 521228-1 is classified as obsolete, necessitating transition to an active equivalent for new designs and ongoing procurement. The substitute part 521408-2 provides full functional and dimensional equivalence while offering significant advantages:

Product Status: The 521408-2 maintains active product status with TE Connectivity, ensuring long-term availability and supply chain continuity.

Regulatory Compliance: The 521408-2 is ROHS3 compliant, representing enhanced environmental and regulatory adherence compared to the RoHS compliant 521228-1.

Inventory Availability: The 521408-2 has substantially higher inventory levels (7265 pieces) compared to the 521228-1 (1150 pieces), supporting production requirements and lead time reduction.

Electrical and Mechanical Equivalence: All critical parameters including tab dimensions, wire gauge range, insulation specifications, and contact material are identical, ensuring direct functional substitution without design modification.

Frequently Asked Questions (FAQ)

Q: Can the 521408-2 be used as a direct replacement for the 521228-1 in existing assemblies?

A: Yes. The 521408-2 is mechanically and electrically equivalent to the 521228-1 across all critical parameters including tab width, thickness, wire gauge range, insulation diameter, and overall length. Direct substitution is supported without assembly modification.

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

A: The 521228-1 is natural colored while the 521408-2 is black. Color is a cosmetic attribute and does not affect electrical performance, mechanical fit, or functional compatibility. Selection between these parts should be based on application-specific color requirements.

Q: Does the contact finish difference impact substitution?

A: The 521228-1 has unspecified contact finish while the 521408-2 features tin contact finish. Both parts use brass as the base contact material. The tin finish on the 521408-2 provides enhanced corrosion resistance and solderability characteristics. This represents a material enhancement rather than a compatibility limitation.

Q: Why is the 521408-2 packaged in Cut Tape format?

A: Cut Tape (CT) packaging is a standard format for automated assembly processes and high-volume production. This packaging format supports efficient component handling and integration into manufacturing workflows.

Q: Are there any compliance differences between the two parts?

A: The 521228-1 is RoHS compliant while the 521408-2 is ROHS3 compliant. ROHS3 represents the current regulatory standard with enhanced environmental requirements. The 521408-2 meets more stringent compliance criteria, making it suitable for applications requiring current regulatory adherence.

Q: What wire gauge range is supported by both connectors?

A: Both the 521228-1 and 521408-2 support 18-22 AWG wire gauges with an insulation diameter range of 0.080" to 0.120" (2.03mm to 3.05mm). This range accommodates standard wire sizes used in automotive, industrial, and consumer applications.

Q: Is the Ultrapod series designation consistent between both parts?

A: Yes. Both the 521228-1 and 521408-2 are part of the TE Connectivity Ultrapod series, confirming design family consistency and interchangeability within the product line.

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