540-44-044-24-000000 PLCC Socket Equivalent & Substitute Parts

Part Overview

The 540-44-044-24-000000 is a 44-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 applications requiring compatible PLCC socket functionality.

Key Parameters

Parameter	Specification
Part Number	540-44-044-24-000000
Manufacturer	Mill-Max Manufacturing Corp.
Type	PLCC Socket
Number of Positions	44 (4 x 11)
Pitch - Mating	0.050" (1.27mm)
Pitch - Post	0.100" (2.54mm)
Contact Finish - Mating	Tin
Contact Material - Mating	Copper Alloy
Mounting Type	Through Hole
Housing Material	Polyphenylene Sulfide (PPS)
Operating Temperature Range	-55°C to 125°C
Contact Resistance	20mOhm
RoHS Status	ROHS3 Compliant
Product Status	Obsolete

Substitute Part Grouping Explanation

The 940-44-044-24-000000 qualifies as a direct substitute based on the following critical parameters:

Matching Parameters:

44-position PLCC socket configuration (4 x 11 grid)
Through-hole mounting type
Closed frame design
Tin contact finish on mating surface
Operating temperature range: -55°C to 125°C
UL94 V-0 flammability rating
ROHS3 compliance
Solder termination method
Post pitch: 0.100" (2.54mm)

Differing Parameters:

Mating pitch: 0.100" (2.54mm) versus 0.050" (1.27mm)
Contact material - mating: Beryllium Copper versus Copper Alloy
Contact material - post: Brass Alloy versus unspecified
Housing material: PCT Polyester versus PPS
Contact resistance: 30mOhm versus 20mOhm
Current rating: 1A (specified for substitute only)

The substitute part maintains functional compatibility for PLCC socket applications while introducing variations in contact materials and housing composition.

Parameter Comparison

Parameter	540-44-044-24-000000 (Main)	940-44-044-24-000000 (Substitute)
Manufacturer	Mill-Max Manufacturing Corp.	Mill-Max Manufacturing Corp.
Type	PLCC Socket	PLCC Socket
Number of Positions	44 (4 x 11)	44 (4 x 11)
Pitch - Mating	0.050" (1.27mm)	0.100" (2.54mm)
Pitch - Post	0.100" (2.54mm)	0.100" (2.54mm)
Contact Finish - Mating	Tin	Tin
Contact Finish Thickness - Mating	150.0µin (3.81µm)	150.0µin (3.81µm)
Contact Material - Mating	Copper Alloy	Beryllium Copper
Mounting Type	Through Hole	Through Hole
Features	Closed Frame	Closed Frame
Termination	Solder	Solder
Contact Finish Thickness - Post	150.0µin (3.81µm)	200.0µin (5.08µm)
Contact Material - Post	Copper Alloy	Brass Alloy
Housing Material	Polyphenylene Sulfide (PPS)	Polycyclohexylenedimethylene Terephthalate (PCT), Polyester
Operating Temperature	-55°C to 125°C	-55°C to 125°C
Material Flammability Rating	UL94 V-0	UL94 V-0
Contact Resistance	20mOhm	30mOhm
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)
Product Status	Obsolete	Active

Engineering Selection Recommendations

The 940-44-044-24-000000 is available as an active product with current manufacturing support, whereas the 540-44-044-24-000000 is obsolete. Both components maintain ROHS3 compliance and UL94 V-0 flammability certification, meeting regulatory requirements for equivalent applications.

The substitute part demonstrates higher contact finish thickness on post terminations (200.0µin versus 150.0µin) and utilizes beryllium copper for mating contacts, which may provide enhanced durability characteristics. The contact resistance specification of 30mOhm for the substitute remains within acceptable parameters for PLCC socket applications.

Selection between these components should be based on specific application requirements regarding mating pitch tolerance, contact material compatibility with intended IC packages, and housing material thermal or chemical resistance needs.

Frequently Asked Questions (FAQ)

Q: Can the 940-44-044-24-000000 directly replace the 540-44-044-24-000000 in existing designs?

A: Both components share identical 44-position PLCC configuration, through-hole mounting, and operating temperature range. However, the mating pitch differs (0.100" versus 0.050"), which affects physical compatibility with specific IC packages. Verification of IC package pitch specifications is required before substitution.

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

A: The main part uses copper alloy contacts, while the substitute uses beryllium copper for mating contacts and brass alloy for post contacts. These material variations affect contact durability and electrical performance characteristics but maintain functional socket operation within specified parameters.

Q: Does the higher contact resistance of the substitute part affect circuit performance?

A: The substitute part specifies 30mOhm contact resistance compared to 20mOhm for the main part. This 10mOhm difference remains negligible for standard PLCC socket applications and does not introduce functional incompatibility.

Q: Are there packaging differences between these parts?

A: The main part packaging is unspecified, while the substitute is packaged in tubes. This affects handling and storage procedures but does not impact electrical or mechanical compatibility.

Q: What compliance certifications apply to both parts?

A: Both components are ROHS3 compliant, UL94 V-0 rated, REACH unaffected, and classified under ECCN EAR99. Moisture sensitivity level is 1 (unlimited) for both parts.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message