TE Connectivity AMP Connectors 521755-2 Equivalent & Substitute Parts

Part Overview

The TE Connectivity AMP Connectors 521755-2 is a rectangular connector header designed for through-hole mounting applications. This connector features a vertical orientation with 2 positions at 5.00mm pitch, shrouded 4-wall construction, and solder termination. The part is classified as obsolete, necessitating identification of active equivalent alternatives for ongoing procurement and design requirements. The substitute part 3-1971846-2 provides functional equivalence with current product status and enhanced availability.

Substiute Parts

521755-2

TE Connectivity AMP ConnectorsIn Stock: 828521755-2 Datasheet

Current PartRFQ

3-1971846-2

TE Connectivity AMP ConnectorsIn Stock: 67893-1971846-2 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution between the TE Connectivity AMP Connectors 521755-2 and 3-1971846-2 is established based on matching critical electrical and mechanical parameters. Both parts share identical specifications for connector type (Header), number of positions (2), mating pitch (5.00mm), mounting method (Through Hole), shrouding configuration (Shrouded - 4 Wall), termination type (Solder), voltage rating (250VAC), operating temperature range (-40°C ~ 120°C), and flammability rating (UL94 V-0). Both parts maintain ROHS3 compliance and MSL 1 rating. The substitute part 3-1971846-2 is currently active in production with significantly higher inventory availability (6772 pieces versus 758 pieces), making it the preferred selection for new designs and ongoing procurement.

Parameter Comparison

Engineering Selection Recommendations

The TE Connectivity AMP Connectors 3-1971846-2 is the appropriate substitute for the obsolete 521755-2 based on the following engineering criteria:

Product Status: The 521755-2 is classified as obsolete, creating supply chain risk for ongoing production and maintenance applications. The 3-1971846-2 maintains active product status with current manufacturing support and significantly higher inventory availability (6772 pieces in stock).

Compliance and Certifications: Both parts maintain identical compliance profiles including ROHS3 certification, UL94 V-0 flammability rating, and EAR99 export classification. Both parts carry MSL 1 rating, indicating unlimited shelf life under standard storage conditions.

Electrical and Mechanical Equivalence: The substitute part matches all critical electrical parameters (250VAC voltage rating, -40°C to 120°C operating temperature range) and mechanical specifications (2-position, 5.00mm pitch, through-hole mounting, shrouded 4-wall construction, solder termination). Contact material differs (Copper Alloy versus Brass) and insulation material specifications vary slightly (PA versus PA66), but both materials satisfy the identical functional requirements and performance standards for this connector category.

Enhanced Features: The substitute part 3-1971846-2 includes Glow Wire Compliance certification and specifies a 20A current rating, providing additional performance documentation and operational clarity compared to the main part.

Frequently Asked Questions (FAQ)

Q: Can the 3-1971846-2 be used as a direct replacement for the 521755-2 in existing designs?

A: Yes. The 3-1971846-2 is electrically and mechanically equivalent to the 521755-2. Both parts share identical connector type, position count, mating pitch, mounting method, shrouding configuration, termination type, voltage rating, and operating temperature range. The substitute part is suitable for direct substitution in board-level applications.

Q: What is the difference between the contact materials in these two parts?

A: The 521755-2 uses Brass contacts while the 3-1971846-2 uses Copper Alloy contacts. Both materials provide equivalent electrical conductivity and contact reliability for general-purpose connector applications at the specified voltage and current levels.

Q: Are there packaging differences between these parts?

A: The 521755-2 packaging is not specified in the available data. The 3-1971846-2 is supplied in Bulk packaging. Confirm packaging requirements with your procurement specifications.

Q: Why should I select the 3-1971846-2 over the 521755-2?

A: The 3-1971846-2 is the recommended selection because it maintains active product status with current manufacturing support, provides significantly higher inventory availability (6772 pieces versus 758 pieces), includes Glow Wire Compliance certification, and specifies a 20A current rating. The obsolete status of the 521755-2 creates long-term supply chain risk.

Q: Do both parts meet the same regulatory requirements?

A: Yes. Both parts are ROHS3 compliant, carry UL94 V-0 flammability certification, and share identical ECCN (EAR99) and HTSUS (8536.69.4040) classifications. Both parts maintain MSL 1 rating for moisture sensitivity.

Q: What is the current rating for the 521755-2?

A: The current rating for the 521755-2 is not specified in the available technical data. The substitute part 3-1971846-2 specifies a 20A current rating.

Q: Are these parts suitable for high-temperature applications?

A: Both parts operate within the -40°C to 120°C temperature range. Applications requiring operation outside this range require alternative connector solutions.