PLCC-028-T-N-TR Equivalent & Substitute Parts

Part Overview

The PLCC-028-T-N-TR is a 28-position PLCC socket manufactured by Samtec Inc., designed for surface mount applications with tin-plated beryllium copper contacts. This component is classified as obsolete, making identification of equivalent and substitute parts essential for ongoing production support and design continuity. Substitute parts must maintain electrical and mechanical compatibility while meeting the same functional requirements for PLCC IC interfacing.

Substiute Parts

PLCC-028-T-N-TR

Samtec Inc.In Stock: 874PLCC-028-T-N-TR Datasheet

Current PartRFQ

540-44-028-17-400004

Mill-Max Manufacturing Corp.In Stock: 1074540-44-028-17-400004 Datasheet

SimilarRFQ

8428-21B1-RK-TR

3MIn Stock: 35998428-21B1-RK-TR Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the PLCC-028-T-N-TR is determined by the following critical parameters:

• 28-position PLCC configuration (4 x 7 grid)
• 0.050" (1.27mm) mating pitch
• Tin contact finish on mating surface
• Surface mount termination with solder connection
• Closed frame design
• UL94 V-0 flammability rating
• ROHS3 compliance
• MSL 1 rating

The two identified substitute parts meet these core electrical and mechanical requirements. Variations in housing material, contact material composition, and post pitch do not preclude substitution when the mating interface parameters remain constant.

Parameter Comparison

Engineering Selection Recommendations

Both substitute parts are classified as active products, providing long-term availability compared to the obsolete PLCC-028-T-N-TR. Selection between the two substitutes should be based on:

The 540-44-028-17-400004 (Mill-Max) maintains the same mating pitch specification (0.050") for both mating and post interfaces, ensuring dimensional consistency with the original design footprint.

The 8428-21B1-RK-TR (3M) provides the highest inventory availability (3560 pcs) and includes specified operating temperature range (-40°C ~ 105°C) and current rating (1 A), supporting applications requiring these performance parameters.

Both parts satisfy ROHS3 compliance, UL94 V-0 flammability requirements, and MSL 1 moisture sensitivity specifications. All three parts are classified under ECCN EAR99 and HTSUS 8536.69.4040.

Frequently Asked Questions (FAQ)

Q: Can the 540-44-028-17-400004 and 8428-21B1-RK-TR be used interchangeably with the PLCC-028-T-N-TR?

A: Both parts meet the core mating interface requirements: 28-position PLCC configuration, 0.050" (1.27mm) mating pitch, tin contact finish, and closed frame design. Mechanical and electrical compatibility is established for standard PLCC IC applications.

Q: What is the significance of the different housing materials?

A: The original part uses Liquid Crystal Polymer (LCP), while substitutes use Polyphenylene Sulfide (PPS) and Glass-Filled Polybutylene Terephthalate (PBT). All materials meet UL94 V-0 flammability requirements. Housing material selection does not affect mating interface compatibility.

Q: Why do the post pitch specifications differ between parts?

A: The PLCC-028-T-N-TR specifies 0.100" (2.54mm) post pitch, while both substitutes specify 0.050" (1.27mm). Post pitch affects solder pad layout on the PCB. Design verification is required to confirm post pitch compatibility with existing PCB footprints.

Q: Are all parts RoHS3 compliant?

A: Yes. The PLCC-028-T-N-TR, 540-44-028-17-400004, and 8428-21B1-RK-TR are all ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity ratings.

Q: What packaging formats are available?

A: The original Samtec part does not specify packaging format. Both Mill-Max and 3M substitutes are supplied in Tape & Reel (TR) format, standard for surface mount component distribution.