TE Connectivity AMP Connectors 1571540-1 PLCC Socket Equivalent & Substitute Parts

Part Overview

The TE Connectivity AMP Connectors 1571540-1 is a 32-position PLCC socket designed for through-hole mounting applications. This connector features a closed frame design with tin-plated copper alloy contacts and polyphenylene sulfide housing. The product is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing design support and component procurement.

Substiute Parts

1571540-1

TE Connectivity AMP ConnectorsIn Stock: 10101571540-1 Datasheet

Current PartRFQ

940-44-020-24-000000

Mill-Max Manufacturing Corp.In Stock: 1245940-44-020-24-000000 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of PLCC sockets is determined by the following critical parameters:

Position Count Compatibility: The main part 1571540-1 contains 32 positions arranged in a 2 x 7, 2 x 9 grid configuration. Substitute parts must accommodate the same pin count and grid arrangement to ensure mechanical and electrical compatibility with the target IC package.

Pitch Specification: Both mating and post pitch must be 0.100" (2.54mm) to maintain proper contact spacing and alignment with standard PLCC package leads.

Contact Finish and Material: Tin plating on both mating and post contacts ensures consistent solderability and electrical performance. Contact material composition (copper alloy or equivalent) determines contact resistance and durability characteristics.

Mounting Configuration: Through-hole mounting type is required for PCB integration using solder termination.

Housing and Mechanical Design: Closed frame design with appropriate housing material (PPS or equivalent polymeric material) provides structural integrity and environmental protection.

Compliance Standards: RoHS3 compliance and UL94 V-0 flammability rating are mandatory for modern electronic applications.

The substitute part 940-44-020-24-000000 differs significantly in position count (20 positions versus 32 positions), which represents a fundamental incompatibility for direct substitution in applications requiring the full 32-position socket configuration.

Parameter Comparison

Engineering Selection Recommendations

Direct Substitution Limitation: The substitute part 940-44-020-24-000000 cannot serve as a direct replacement for the 1571540-1 due to incompatible position counts (20 positions versus 32 positions). Direct substitution requires a PLCC socket with identical 32-position configuration.

Compliance Alignment: Both parts maintain ROHS3 compliance and UL94 V-0 flammability certification, satisfying modern regulatory requirements for electronic component applications.

Product Status Consideration: The main part 1571540-1 is classified as obsolete, while the substitute part 940-44-020-24-000000 maintains active product status. Active status indicates ongoing manufacturer support, availability, and potential design improvements.

Contact Material Differences: The substitute part employs beryllium copper for mating contacts and brass alloy for post contacts, compared to copper alloy in the main part. These material variations result in different contact resistance characteristics (30mOhm specified for the substitute).

Housing Material Variation: The substitute part uses PCT/polyester housing material instead of PPS, which may affect thermal and chemical resistance properties in specific application environments.

Thermal Operating Range: The substitute part specifies an operating temperature range of -55°C to 125°C, whereas the main part does not provide this specification.

Frequently Asked Questions (FAQ)

Q: Can the Mill-Max 940-44-020-24-000000 directly replace the TE Connectivity 1571540-1?

A: No. The Mill-Max part contains 20 positions while the TE Connectivity part contains 32 positions. Direct substitution requires a 32-position PLCC socket. The 20-position socket is incompatible with IC packages designed for 32-position PLCC footprints.

Q: What are the critical parameters for PLCC socket substitution?

A: Critical parameters include: position count and grid configuration, mating and post pitch (0.100" / 2.54mm standard), contact finish type (tin plating), mounting type (through-hole), and housing material. All parameters must match the original specification for functional compatibility.

Q: Are both parts RoHS3 compliant?

A: Yes. Both the TE Connectivity 1571540-1 and Mill-Max 940-44-020-24-000000 are ROHS3 compliant and carry UL94 V-0 flammability ratings, meeting current regulatory standards for electronic components.

Q: What is the significance of the product status difference?

A: The main part is classified as obsolete, indicating discontinued manufacturing and limited availability. The substitute part maintains active status, indicating ongoing production and manufacturer support. Active status typically provides better long-term availability and design continuity.

Q: How do contact material differences affect performance?

A: The main part uses copper alloy contacts while the substitute uses beryllium copper (mating) and brass alloy (post). These materials exhibit different contact resistance values and mechanical properties. The substitute specifies 30mOhm contact resistance, providing a quantified performance metric.

Q: What housing material differences exist between these parts?

A: The main part uses polyphenylene sulfide (PPS) while the substitute uses polycyclohexylenedimethylene terephthalate (PCT) with polyester. PPS generally offers superior thermal and chemical resistance compared to PCT/polyester, which may be relevant for specific application environments.

Q: Does the substitute part provide thermal operating specifications?

A: Yes. The Mill-Max 940-44-020-24-000000 specifies an operating temperature range of -55°C to 125°C. The main part does not provide this specification, making the substitute's thermal rating a documented reference point for temperature-sensitive applications.

Q: Are moisture sensitivity levels equivalent?

A: Yes. Both parts carry MSL 1 (Unlimited) rating, indicating no moisture sensitivity restrictions for storage and handling.