3M 100-048-050 DIP Socket 48-Position Equivalent & Substitute Parts

Part Overview

The 3M 100-048-050 is a 48-position DIP socket with 0.6" row spacing, designed for through-hole mounting of dual inline package integrated circuits. This connector features gold-plated beryllium copper mating contacts and brass post terminals, rated for 1 A continuous current across an operating temperature range of -65°C to 125°C. The part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.

Key Parameters

Parameter	Value
Manufacturer Part Number	100-048-050
Manufacturer	3M
Category	Sockets for ICs, Transistors
Type	DIP, 0.6" (15.24mm) Row Spacing
Number of Positions	48 (2 x 24)
Pitch - Mating	0.100" (2.54mm)
Pitch - Post	0.100" (2.54mm)
Contact Finish - Mating	Gold
Contact Material - Mating	Beryllium Copper
Mounting Type	Through Hole
Termination	Solder
Operating Temperature	-65°C ~ 125°C
Current Rating	1 A
Material Flammability Rating	UL94 V-0
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution of the 3M 100-048-050 is determined by the following critical parameters that must remain constant:

Position Count & Row Spacing: 48 positions (2 x 24) with 0.6" (15.24mm) row spacing
Pitch Specifications: 0.100" (2.54mm) mating and post pitch
Mating Contact Material: Beryllium copper for consistent contact performance
Mounting Configuration: Through-hole solder termination
Mechanical Compatibility: Socket envelope and termination post dimensions must accommodate standard DIP package insertion

All substitute parts listed are manufactured by Mill-Max Manufacturing Corp. and maintain these core electrical and mechanical parameters. Variations in contact finish thickness, post finish material, post length, and housing material are permitted within the DIP socket category, provided they do not affect insertion force, contact reliability, or PCB mounting compatibility.

Parameter Comparison

Parameter	3M 100-048-050	Mill-Max 110-11-648-41-001000	Mill-Max 111-41-648-41-001000	Mill-Max 111-43-648-41-001000	Mill-Max 111-91-648-41-001000	Mill-Max 111-93-648-41-001000	Mill-Max 115-41-648-41-001000	Mill-Max 115-41-648-41-003000	Mill-Max 115-43-648-41-001000	Mill-Max 115-43-648-41-003000	Mill-Max 115-44-648-41-003000
Positions	48 (2 x 24)	48 (2 x 24)	48 (2 x 24)	48 (2 x 24)	48 (2 x 24)	48 (2 x 24)	48 (2 x 24)	48 (2 x 24)	48 (2 x 24)	48 (2 x 24)	48 (2 x 24)
Row Spacing	0.6" (15.24mm)	0.6" (15.24mm)	0.6" (15.24mm)	0.6" (15.24mm)	0.6" (15.24mm)	0.6" (15.24mm)	0.6" (15.24mm)	0.6" (15.24mm)	0.6" (15.24mm)	0.6" (15.24mm)	0.6" (15.24mm)
Pitch - Mating	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)
Pitch - Post	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)
Contact Finish - Mating	Gold	Gold	Gold	Gold	Gold	Gold	Gold	Gold	Gold	Gold	Tin
Contact Material - Mating	Beryllium Copper	Beryllium Copper	Beryllium Copper	Beryllium Copper	Beryllium Copper	Beryllium Copper	Beryllium Copper	Beryllium Copper	Beryllium Copper	Beryllium Copper	Beryllium Copper
Contact Finish Thickness - Mating	8.00µin (0.203µm)	10.0µin (0.25µm)	10.0µin (0.25µm)	30.0µin (0.76µm)	10.0µin (0.25µm)	30.0µin (0.76µm)	10.0µin (0.25µm)	10.0µin (0.25µm)	30.0µin (0.76µm)	30.0µin (0.76µm)	100.0µin (2.54µm)
Contact Finish - Post	Gold	Gold	Tin	Tin	Tin-Lead	Tin-Lead	Tin	Tin	Tin	Tin	Tin
Contact Finish Thickness - Post	Flash	10.0µin (0.25µm)	200.0µin (5.08µm)	200.0µin (5.08µm)	200.0µin (5.08µm)	200.0µin (5.08µm)	200.0µin (5.08µm)	200.0µin (5.08µm)	200.0µin (5.08µm)	200.0µin (5.08µm)	200.0µin (5.08µm)
Contact Material - Post	Brass	Brass Alloy	Brass Alloy	Brass Alloy	Brass Alloy	Brass Alloy	Brass Alloy	Brass Alloy	Brass Alloy	Brass Alloy	Brass Alloy
Termination Post Length	0.126" (3.20mm)	0.125" (3.18mm)	0.170" (4.32mm)	0.170" (4.32mm)	0.170" (4.32mm)	0.125" (3.18mm)	0.108" (2.74mm)	0.095" (2.41mm)	0.108" (2.74mm)	0.108" (2.74mm)	0.095" (2.41mm)
Operating Temperature	-65°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C
Current Rating	1 A	3 A	3 A	3 A	3 A	3 A	3 A	3 A	3 A	3 A	3 A
Contact Resistance	Not specified	10mOhm	10mOhm	10mOhm	10mOhm	Not specified	10mOhm	10mOhm	10mOhm	Not specified	10mOhm
Housing Material	Polyphenylene Sulfide (PPS), Glass Filled	Polycyclohexylenedimethylene Terephthalate (PCT), Polyester	Polycyclohexylenedimethylene Terephthalate (PCT), Polyester	Polycyclohexylenedimethylene Terephthalate (PCT), Polyester	Polycyclohexylenedimethylene Terephthalate (PCT), Polyester	Polycyclohexylenedimethylene Terephthalate (PCT), Polyester	Polycyclohexylenedimethylene Terephthalate (PCT), Polyester	Polycyclohexylenedimethylene Terephthalate (PCT), Polyester	Polycyclohexylenedimethylene Terephthalate (PCT), Polyester	Polycyclohexylenedimethylene Terephthalate (PCT), Polyester	Polycyclohexylenedimethylene Terephthalate (PCT), Polyester
Material Flammability Rating	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	Not specified	UL94 V-0	UL94 V-0	UL94 V-0	Not specified	UL94 V-0
Product Status	Obsolete	Active	Active	Active	Active	Active	Active	Active	Active	Active	Active
RoHS Status	Not specified	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	Not specified	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

All Mill-Max substitute parts maintain mechanical and electrical compatibility with the 3M 100-048-050 through identical position count, row spacing, and pitch specifications. Selection among the substitute options depends on specific application requirements:

For RoHS3 Compliance Applications: Mill-Max 110-11-648-41-001000, 111-41-648-41-001000, 111-43-648-41-001000, 115-41-648-41-001000, 115-41-648-41-003000, 115-43-648-41-001000, and 115-44-648-41-003000 are all ROHS3 compliant. The Mill-Max 111-93-648-41-001000 is RoHS non-compliant and should not be used in applications requiring RoHS certification.

For Extended Low-Temperature Operation: The 3M 100-048-050 operates to -65°C. All Mill-Max substitutes operate to -55°C minimum, which is acceptable for most industrial applications but does not extend to the original part's lower temperature limit.

For Higher Current Capacity: All Mill-Max substitutes are rated for 3 A continuous current, compared to the original 1 A rating, providing improved current handling capability.

For Post Finish Selection: Gold-plated posts (Mill-Max 110-11-648-41-001000) offer the closest match to the original part's gold post finish. Tin and tin-lead post finishes are suitable for standard solder reflow processes and provide cost optimization.

For Post Length Compatibility: Post length varies from 0.095" to 0.170". Selection should be based on PCB thickness and solder pad design. The Mill-Max 110-11-648-41-001000 at 0.125" (3.18mm) most closely matches the original 0.126" (3.20mm) specification.

Frequently Asked Questions (FAQ)

Q: Can Mill-Max sockets be used as direct replacements for the 3M 100-048-050?

A: Yes. All listed Mill-Max parts maintain the critical mechanical and electrical parameters: 48 positions, 0.6" row spacing, 0.100" pitch, beryllium copper mating contacts, and through-hole solder termination. These parameters ensure mechanical fit and electrical performance compatibility with standard 48-pin DIP packages.

Q: What is the difference between the various Mill-Max series (110, 111, 115)?

A: The series designation indicates different design generations and feature sets within the Mill-Max product line. All listed parts within these series maintain the same core DIP socket specifications for 48-position, 0.6" row spacing applications. Differences exist in contact finish specifications, post length, and housing material formulations.

Q: Does the change from PPS to PCT housing material affect performance?

A: Both materials meet UL94 V-0 flammability requirements and are suitable for through-hole solder mounting. PCT (polycyclohexylenedimethylene terephthalate) is a standard alternative to PPS (polyphenylene sulfide) in DIP socket applications. The material change does not affect electrical performance or mechanical compatibility with DIP packages.

Q: Why do some substitutes have higher current ratings (3 A vs. 1 A)?

A: The Mill-Max substitutes feature improved contact design and materials that support higher current capacity. The 3 A rating represents the socket's maximum continuous current capability and does not require design changes in applications originally rated for 1 A.

Q: What is the significance of contact finish thickness variations?

A: Contact finish thickness affects contact durability and wear resistance during insertion cycles. Thicker finishes (30.0µin and higher) provide extended contact life in high-cycle applications. The original 8.00µin specification is maintained or exceeded by all substitutes, ensuring equivalent or improved contact reliability.

Q: Are there any compliance differences between the substitute options?

A: Yes. Most Mill-Max substitutes are ROHS3 compliant. The Mill-Max 111-93-648-41-001000 is RoHS non-compliant and should not be selected for applications requiring RoHS certification. All parts are EAR99 classified and REACH unaffected or compliant.

Q: How should post length be selected for PCB integration?

A: Post length must accommodate PCB thickness plus solder fillet formation. The original 0.126" (3.20mm) specification is most closely matched by Mill-Max 110-11-648-41-001000 at 0.125" (3.18mm). Shorter posts (0.095" to 0.108") are suitable for thinner PCBs, while longer posts (0.170") accommodate thicker boards or applications requiring extended solder joint length.

Q: Can post finish material (gold, tin, tin-lead) be interchanged?

A: Yes, within the constraints of your soldering process. Gold-plated posts (Mill-Max 110-11-648-41-001000) are compatible with all standard solder types. Tin and tin-lead finishes are optimized for lead-free and traditional solder reflow processes respectively. Selection should align with your manufacturing process specifications.

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