Equivalent & Substitute Parts for TE Connectivity 2-640358-2 DIP Socket

Part Overview

The TE Connectivity 2-640358-2 is a 16-position DIP socket with 0.3" (7.62mm) row spacing, designed for through-hole mounting applications. This component features gold-plated beryllium copper contacts and a closed-frame thermoplastic housing rated UL94 V-0. The part is classified as obsolete, necessitating identification of active equivalent and substitute components that maintain functional compatibility while meeting current procurement requirements.

Key Parameters

Parameter	Value
Number of Positions	16 (2 x 8)
Row Spacing	0.3" (7.62mm)
Pitch - Mating	0.100" (2.54mm)
Pitch - Post	0.100" (2.54mm)
Mounting Type	Through Hole
Termination	Solder
Contact Finish - Mating	Gold
Contact Finish - Post	Gold
Material Flammability Rating	UL94 V-0
Operating Temperature Range	-55°C ~ 105°C
Contact Resistance	30mOhm
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution compatibility for the TE Connectivity 2-640358-2 is determined by the following critical parameters:

Mechanical Compatibility Requirements:

16-position configuration (2 x 8 grid)
0.3" (7.62mm) row spacing
0.100" (2.54mm) pitch for both mating and post contacts
Through-hole mounting capability
Solder termination

Electrical Compatibility Requirements:

Contact resistance of 30mOhm or lower
UL94 V-0 flammability rating
Operating temperature range encompassing -55°C to 105°C
Moisture sensitivity level 1 (unlimited)

Contact Material Considerations:

Gold-plated contacts are preferred for direct equivalence
Tin-plated contacts with phosphor bronze or beryllium copper substrates are acceptable substitutes where application requirements permit

Substitute parts are grouped into two categories: direct equivalents (maintaining gold plating and extended temperature range) and functional alternatives (tin-plated variants with reduced operating temperature ranges).

Parameter Comparison

Parameter	2-640358-2 (Main)	1-1825093-4 (Direct Equivalent)	4816-3000-CP (Substitute)	4816-3004-CP (Substitute)	A 16-LC-TT (Substitute)
Manufacturer	TE Connectivity	TE Connectivity	3M	3M	Assmann WSW
Number of Positions	16 (2 x 8)	16 (2 x 8)	16 (2 x 8)	16 (2 x 8)	16 (2 x 8)
Row Spacing	0.3" (7.62mm)	0.3" (7.62mm)	0.3" (7.62mm)	0.3" (7.62mm)	0.3" (7.62mm)
Pitch - Mating	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)
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Termination	Solder	Solder	Solder	Solder	Solder
Contact Finish - Mating	Gold	Gold	Tin	Tin	Tin
Contact Finish - Post	Gold	Gold	Tin	Tin	Tin
Contact Material - Mating	Beryllium Copper	Beryllium Copper	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze
Contact Material - Post	Beryllium Copper	Beryllium Copper	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze
Material Flammability Rating	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0
Operating Temperature Range	-55°C ~ 105°C	-55°C ~ 125°C	-25°C ~ 85°C	-25°C ~ 85°C	-55°C ~ 85°C
Contact Resistance	30mOhm	30mOhm	Not specified	Not specified	30mOhm
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Product Status	Obsolete	Active	Active	Active	Active
RoHS Status	Non-compliant	Compliant	Compliant	Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Primary Recommendation: TE Connectivity 1-1825093-4

The TE Connectivity 1-1825093-4 is the direct equivalent for the obsolete 2-640358-2. This part maintains identical mechanical and electrical specifications with the following advantages:

Active product status with current manufacturing support
RoHS compliant, meeting modern regulatory requirements
Extended operating temperature range (-55°C ~ 125°C) exceeding the original specification
Identical contact material (beryllium copper) and finish (gold plating)
Identical contact resistance (30mOhm)
Same pitch, row spacing, and position configuration
Identical flammability rating (UL94 V-0)

The only documented difference is the frame design (open frame versus closed frame), which does not affect functional compatibility in standard DIP socket applications.

Secondary Recommendations: 3M 4816-3000-CP and 4816-3004-CP

These 3M components are functionally compatible substitutes with the following considerations:

Active product status with established supply chain
RoHS compliant
Identical mechanical configuration (16 positions, 0.3" row spacing, 0.100" pitch)
Reduced operating temperature range (-25°C ~ 85°C) suitable for commercial and industrial applications
Tin-plated contacts with phosphor bronze substrate provide adequate contact resistance for standard applications
UL94 V-0 flammability rating maintained

These parts are appropriate for applications where the reduced temperature range is acceptable and cost optimization is a priority.

Tertiary Recommendation: Assmann WSW A 16-LC-TT

The Assmann WSW A 16-LC-TT is a functional substitute with the following characteristics:

Active product status with ROHS3 compliance
Operating temperature range (-55°C ~ 85°C) suitable for extended temperature applications below the original specification
Identical contact resistance (30mOhm) and mechanical configuration
Tin-plated phosphor bronze contacts
UL94 V-0 flammability rating
Polybutylene terephthalate (PBT) housing material

This part is suitable for applications requiring lower operating temperature limits than the 3M alternatives while maintaining contact resistance specifications.

Frequently Asked Questions (FAQ)

Q: Can the TE Connectivity 1-1825093-4 be used as a direct replacement for the 2-640358-2?

A: Yes. The 1-1825093-4 maintains all critical mechanical and electrical parameters required for functional compatibility. The open-frame design does not affect socket performance in standard DIP applications. The extended temperature range and RoHS compliance provide additional benefits for modern applications.

Q: What is the difference between gold-plated and tin-plated contacts in these DIP sockets?

A: Gold plating provides superior corrosion resistance and lower contact resistance over extended service life. Tin plating is acceptable for standard applications with adequate contact pressure and environmental protection. The choice depends on application requirements for contact reliability and environmental exposure.

Q: Are the 3M 4816-3000-CP and 4816-3004-CP parts interchangeable?

A: Yes. Both parts are identical in electrical and mechanical specifications. The difference is packaging quantity and inventory availability. Selection between these parts should be based on procurement requirements and available stock.

Q: What is the significance of the operating temperature range difference between the main part and substitutes?

A: The original 2-640358-2 operates from -55°C to 105°C. The TE Connectivity 1-1825093-4 extends this to 125°C. The 3M parts operate from -25°C to 85°C, and the Assmann part operates from -55°C to 85°C. Selection depends on the actual operating environment of the application. For applications within -25°C to 85°C, all substitutes are suitable. For applications requiring -55°C to 105°C operation, only the TE Connectivity 1-1825093-4 is appropriate.

Q: Does the housing material difference affect socket performance?

A: The housing material differences (thermoplastic glass-filled versus polyester glass-filled versus polybutylene terephthalate) do not affect electrical performance. All materials meet UL94 V-0 flammability requirements. Material selection impacts mechanical durability and environmental resistance. For standard applications, all materials are functionally equivalent.

Q: What is the contact resistance specification, and why is it important?

A: Contact resistance is specified at 30mOhm for the main part, 1-1825093-4, and A 16-LC-TT. The 3M parts do not specify contact resistance but are designed for 1 Amp current rating. Lower contact resistance reduces voltage drop and heat generation during signal transmission. The 30mOhm specification is suitable for standard logic and signal applications.

Q: Are all substitute parts RoHS compliant?

A: Yes. The TE Connectivity 1-1825093-4 is RoHS compliant. The 3M parts (4816-3000-CP and 4816-3004-CP) are RoHS compliant. The Assmann WSW A 16-LC-TT is ROHS3 compliant. The original 2-640358-2 is RoHS non-compliant. For applications requiring RoHS compliance, any of the substitute parts are suitable.

Q: What is the Moisture Sensitivity Level (MSL) rating, and what does it mean?

A: All parts in this comparison are rated MSL 1 (Unlimited), indicating no moisture sensitivity. These components do not require special moisture protection during storage, handling, or assembly. Standard storage conditions are acceptable.

Q: Can these DIP sockets be used for both IC and transistor applications?

A: Yes. These sockets are categorized as "Sockets for ICs, Transistors" and are designed for through-hole mounting of dual inline package components. They are suitable for both integrated circuit and discrete transistor applications where DIP packaging is used.

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