540-44-032-24-000000 PLCC Socket Equivalent & Substitute Parts

Part Overview

The 540-44-032-24-000000 is a 32-position PLCC socket manufactured by Mill-Max Manufacturing Corp., designed for through-hole mounting applications. This component features tin-plated copper alloy contacts with a 0.050" (1.27mm) pitch and operates across the -55°C to 125°C temperature range. The product is currently obsolete, making identification of suitable substitute components essential for ongoing maintenance, repair, and legacy system support.

Substiute Parts

540-44-032-24-000000

Mill-Max Manufacturing Corp.In Stock: 884540-44-032-24-000000 Datasheet

Current PartRFQ

940-44-032-24-000000

Mill-Max Manufacturing Corp.In Stock: 4712940-44-032-24-000000 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 540-44-032-24-000000 is based on the following critical parameters that must align for functional compatibility:

Mandatory Matching Parameters:

• Type: PLCC socket
• Number of Positions: 32 (2 x 7, 2 x 9)
• Mounting Type: Through Hole
• Operating Temperature Range: -55°C ~ 125°C
• Contact Finish: Tin
• Termination: Solder

Allowable Variations:

• Pitch - Mating: The substitute part 940-44-032-24-000000 operates at 0.100" (2.54mm) pitch, which differs from the original 0.050" (1.27mm) pitch. This represents a significant geometric change that affects PCB layout compatibility.
• Contact Material: Substitution from Copper Alloy to Beryllium Copper is permissible based on electrical performance characteristics.
• Housing Material: Change from PPS to PCT/Polyester is acceptable within the specified operating temperature range.
• Contact Resistance: Increase from 20mOhm to 30mOhm remains within acceptable electrical parameters for this socket category.

Parameter Comparison

Engineering Selection Recommendations

The 940-44-032-24-000000 is available as an active product with current manufacturing support, whereas the 540-44-032-24-000000 is obsolete. Both components maintain ROHS3 compliance and UL94 V-0 flammability ratings, ensuring regulatory alignment for applications requiring these certifications.

Selection of the substitute part requires PCB layout evaluation due to the pitch difference (0.050" versus 0.100"). The increased contact resistance (30mOhm versus 20mOhm) remains within acceptable parameters for standard IC socket applications. The substitute part's higher contact finish thickness on the post (200.0µin versus 150.0µin) provides enhanced durability for repeated insertion cycles.

Frequently Asked Questions (FAQ)

Q: Can the 940-44-032-24-000000 directly replace the 540-44-032-24-000000 on existing PCBs?

A: Direct PCB replacement is not possible without layout modification. The pitch difference (0.050" versus 0.100") requires redesign of the mounting footprint. The substitute part occupies a larger physical area on the board.

Q: What is the significance of the pitch difference between these two parts?

A: Pitch defines the center-to-center distance between contact positions. The 0.050" pitch of the original part accommodates higher-density layouts, while the 0.100" pitch of the substitute requires more board space. This is a fundamental geometric parameter that cannot be accommodated through component selection alone.

Q: Are the contact materials interchangeable from an electrical standpoint?

A: Both Copper Alloy and Beryllium Copper contacts provide suitable electrical performance for PLCC socket applications. The Beryllium Copper in the substitute part offers enhanced spring characteristics and contact reliability.

Q: Does the increase in contact resistance affect circuit performance?

A: The contact resistance increase from 20mOhm to 30mOhm remains within acceptable limits for IC socket applications. This parameter does not typically impact circuit functionality in standard digital or analog applications.

Q: What packaging format is provided for the substitute part?

A: The 940-44-032-24-000000 is supplied in tube packaging, whereas the original part packaging is not specified. Verify packaging requirements for your assembly process.

Q: Are both parts suitable for the same operating temperature range?

A: Yes, both components operate across -55°C to 125°C, ensuring thermal compatibility for applications within this range.