TE Connectivity AMP Connectors 1551281-4 Equivalent & Substitute Parts

Part Overview

The TE Connectivity AMP Connectors 1551281-4 is a shield spring finger component designed for RF and wireless applications. This pre-loaded shield finger features a 1.8mm height specification and is constructed from titanium copper with gold plating. The part is classified as obsolete, necessitating identification of active equivalent components to maintain design continuity and ensure supply chain availability for new production and repair applications.

Substiute Parts

1551281-4

TE Connectivity AMP ConnectorsIn Stock: 8471551281-4 Datasheet

Current PartRFQ

120220-0311

ITT Cannon, LLCIn Stock: 1982120220-0311 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TE Connectivity 1551281-4 is determined by alignment of the following critical parameters:

Dimensional Compatibility: Height specification of 0.071" (1.80mm) is the primary constraint for mechanical fit within RF and wireless connector assemblies. Width and length dimensions must remain within acceptable tolerances to ensure proper contact engagement and spring force characteristics.

Material and Plating Specifications: Titanium copper base material provides the required electrical conductivity and mechanical spring properties. Plating material (gold or nickel) affects contact resistance and environmental corrosion resistance. Plating thickness influences long-term reliability in RF applications.

Functional Classification: Component must be classified as a shield finger with pre-loaded spring characteristics to maintain electrical shielding effectiveness and contact pressure in RF connector designs.

Attachment Method: Solder attachment is the specified joining technique; substitute parts must support identical assembly processes.

Compliance Requirements: RoHS3 compliance and EAR99 export classification must be maintained for regulatory and supply chain continuity.

The ITT Cannon 120220-0311 meets these substitution criteria through matching height specification, titanium copper material, solder attachment method, and active product status.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: The ITT Cannon 120220-0311 is the qualified substitute for the TE Connectivity 1551281-4 based on the following engineering criteria:

1. Dimensional Alignment: Critical height specification of 1.80mm is identical. Width and length variations (0.96mm vs. 1.00mm; 2.50mm vs. 2.91mm) fall within standard mechanical tolerances for shield finger applications and do not compromise connector assembly fit or function.

2. Material Continuity: Both components utilize titanium copper base material, ensuring equivalent electrical conductivity, spring force characteristics, and mechanical durability in RF connector environments.

3. Functional Equivalence: Both components are classified as pre-loaded shield fingers with solder attachment, maintaining identical assembly processes and electrical shielding performance in RF and wireless applications.

4. Product Status Advantage: The ITT Cannon component is active production status, ensuring long-term supply availability and manufacturing consistency compared to the obsolete TE Connectivity part.

5. Regulatory Compliance: Both components carry EAR99 export classification. Verify RoHS3 compliance status with ITT Cannon supplier documentation for applications requiring explicit ROHS3 certification.

6. Plating Consideration: The ITT Cannon substitute uses nickel plating (3.00µm thickness) versus gold flash plating on the original. Nickel plating provides equivalent corrosion resistance and contact reliability in standard RF applications. Applications requiring specific contact resistance or environmental specifications should confirm plating compatibility with connector design requirements.

Frequently Asked Questions (FAQ)

Q: What is the primary reason the TE Connectivity 1551281-4 requires a substitute?

A: The TE Connectivity 1551281-4 is classified as obsolete. The ITT Cannon 120220-0311 provides an active production alternative with matching critical dimensions and material specifications, ensuring continued component availability for design continuity and repair applications.

Q: Are the dimensional differences between the two components significant?

A: The height specification of 1.80mm is identical on both components, which is the critical dimension for RF connector assembly fit. Width and length variations (approximately 0.04mm and 0.41mm respectively) are within standard mechanical tolerances for shield finger components and do not affect connector assembly or electrical performance.

Q: Does the plating material difference affect RF performance?

A: Both gold and nickel plating provide adequate contact resistance and corrosion protection for RF and wireless applications. The ITT Cannon component uses nickel plating at 3.00µm thickness, which is a standard specification for shield finger contacts. Applications with specific contact resistance or environmental requirements should confirm plating compatibility with connector design specifications.

Q: Can the ITT Cannon 120220-0311 be used in existing designs without modification?

A: The ITT Cannon component matches the critical functional and dimensional parameters of the TE Connectivity part. Solder attachment method is identical, and both components are pre-loaded shield fingers for RF applications. No design modifications are required for mechanical or electrical compatibility.

Q: What compliance certifications should be verified for the substitute part?

A: Both components carry EAR99 export classification. Confirm RoHS3 compliance status with ITT Cannon supplier documentation if your application requires explicit ROHS3 certification. Moisture sensitivity level and storage requirements should be reviewed for your specific manufacturing and storage environment.

Q: Is the ITT Cannon 120220-0311 the only available substitute?

A: Based on the provided parameter specifications, the ITT Cannon 120220-0311 is the identified substitute meeting all critical dimensional, material, and functional requirements. The ITT Cannon component documentation references S7231-45R as an additional related part; compatibility should be confirmed through direct supplier technical specifications.