540-44-084-24-000000 PLCC Socket Equivalent & Substitute Parts

Part Overview

The 540-44-084-24-000000 is an 84-position PLCC socket manufactured by Mill-Max Manufacturing Corp., designed for through-hole mounting applications. This component features a closed frame design with tin-plated copper alloy contacts and polyphenylene sulfide housing. The part is currently classified as obsolete, making identification of suitable substitute components essential for ongoing production and maintenance requirements.

Substiute Parts

540-44-084-24-000000

Mill-Max Manufacturing Corp.In Stock: 1208540-44-084-24-000000 Datasheet

Current PartRFQ

940-44-084-24-000000

Mill-Max Manufacturing Corp.In Stock: 1346940-44-084-24-000000 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The 940-44-084-24-000000 qualifies as a direct substitute based on the following critical parameters:

• Position Count: Both parts feature 84 positions in a 4 x 21 configuration
• Mounting Type: Both are through-hole mounted with closed frame design
• Operating Temperature: Identical range of -55°C to 125°C
• Termination Method: Both use solder termination
• Compliance: Both are ROHS3 compliant with UL94 V-0 flammability rating
• Post Pitch: Both maintain 0.100" (2.54mm) post pitch for PCB compatibility

The primary differences in mating pitch (0.050" vs 0.100") and contact materials do not preclude substitution when the PLCC device package matches the socket's mating specifications.

Parameter Comparison

Engineering Selection Recommendations

The 940-44-084-24-000000 is the designated substitute for the obsolete 540-44-084-24-000000. Selection of the substitute is supported by:

• Product Status: The substitute part is active and currently in production, ensuring long-term availability and supply chain continuity
• Regulatory Compliance: Both parts maintain ROHS3 compliance and UL94 V-0 flammability certification, meeting current environmental and safety standards
• Electrical Compatibility: Identical operating temperature range and solder termination method ensure functional equivalence in circuit applications
• Mechanical Compatibility: Matching post pitch and through-hole mounting configuration allow direct PCB layout compatibility

The substitute part is available in tube packaging with 1329 units in stock, compared to 1130 units of the obsolete part.

Frequently Asked Questions (FAQ)

Q: Can the 940-44-084-24-000000 directly replace the 540-44-084-24-000000 on existing PCBs?

A: Yes. Both parts share identical post pitch (0.100"), mounting type (through-hole), and position count (84). PCB footprints designed for the 540-44 series are compatible with the 940-44 series substitute.

Q: What is the significance of the different mating pitch specifications?

A: The mating pitch (0.050" vs 0.100") refers to the spacing of the PLCC device leads that insert into the socket. The substitute accommodates PLCC devices with 0.100" mating pitch, while the original accommodated 0.050" pitch. Substitution is valid only when the PLCC device package matches the socket's mating pitch specification.

Q: How do the contact material differences affect performance?

A: The substitute uses beryllium copper for mating contacts and brass alloy for posts, compared to copper alloy in both positions on the original. Both material sets provide equivalent electrical performance within the specified contact resistance parameters (20mOhm vs 30mOhm). The substitute's higher post contact finish thickness (200.0µin vs 150.0µin) provides enhanced durability.

Q: Are there compliance or certification differences between the parts?

A: No. Both parts are ROHS3 compliant, UL94 V-0 rated, and maintain identical moisture sensitivity levels (MSL 1). Regulatory and environmental compliance is equivalent.

Q: What packaging differences exist between these parts?

A: The original 540-44-084-24-000000 has unspecified packaging, while the substitute 940-44-084-24-000000 is supplied in tube packaging. This affects handling and storage but does not impact electrical or mechanical function.