ICO-640-STT Equivalent & Substitute Parts

Part Overview

The ICO-640-STT is a 40-position DIP socket manufactured by Samtec Inc., designed for through-hole mounting applications. This low-profile screw machine socket features 0.6" row spacing and tin contact finish, operating across the temperature range of -55°C to 105°C. The part is currently active in production with 776 units in stock. Equivalent and substitute parts are identified to provide alternative sourcing options when the primary part is unavailable or when specific application requirements necessitate alternative specifications.

Substiute Parts

ICO-640-STT

Samtec Inc.In Stock: 877ICO-640-STT Datasheet

Current PartRFQ

110-99-640-41-001000

Mill-Max Manufacturing Corp.In Stock: 1185110-99-640-41-001000 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ICO-640-STT is determined by strict equivalence in the following critical parameters:

Mechanical Compatibility:

• Position count: 40 (2 x 20)
• DIP socket type with 0.6" row spacing
• Pitch - Mating: 0.100" (2.54mm)
• Through-hole mounting configuration
• Open frame design

Electrical Compatibility:

• Contact material - Mating: Beryllium Copper
• Termination method: Solder
• Contact finish material compatibility

Environmental Compatibility:

• Operating temperature range overlap
• Material flammability rating

The substitute part 110-99-640-41-001000 (Mill-Max Manufacturing Corp.) meets these mechanical and electrical compatibility criteria. Substitution is valid where the substitute part's specifications do not fall below the minimum requirements of the application.

Parameter Comparison

Engineering Selection Recommendations

Primary Part Selection (ICO-640-STT): The ICO-640-STT is the preferred selection for applications requiring ROHS3 compliance. This part is actively produced and maintains full regulatory compliance for restricted substance directives.

Substitute Part Selection (110-99-640-41-001000): The Mill-Max 110-99-640-41-001000 is mechanically and electrically compatible with the ICO-640-STT for applications where RoHS compliance is not a requirement. This substitute provides higher current rating (3 A versus 1 A) and extended operating temperature range (-55°C to 125°C versus -55°C to 105°C). The contact finish differs (Tin-Lead versus Tin), which may affect solderability characteristics in specific manufacturing processes.

Compliance Considerations: Applications subject to RoHS3 regulations must use the ICO-640-STT. Applications without RoHS requirements may use the Mill-Max substitute where the higher current rating and extended temperature range provide operational advantages.

Frequently Asked Questions (FAQ)

Q: Can the 110-99-640-41-001000 be used as a direct replacement for the ICO-640-STT?

A: The 110-99-640-41-001000 is mechanically and electrically compatible for through-hole mounting and accepts the same 40-position DIP component packages. However, the substitute is RoHS non-compliant, whereas the ICO-640-STT is ROHS3 compliant. Selection depends on regulatory requirements of the application.

Q: What are the differences in contact finish between these parts?

A: The ICO-640-STT uses tin contact finish on mating surfaces. The 110-99-640-41-001000 uses tin-lead contact finish with 200.0µin (5.08µm) thickness specification. Both finishes are suitable for solder termination, but tin-lead may exhibit different wetting characteristics during wave or reflow soldering processes.

Q: Are the operating temperature ranges compatible?

A: The ICO-640-STT operates from -55°C to 105°C. The 110-99-640-41-001000 operates from -55°C to 125°C. The substitute part has an extended upper temperature limit. For applications operating within the -55°C to 105°C range, both parts are compatible. For applications requiring operation above 105°C, only the Mill-Max substitute is suitable.

Q: What is the difference in current rating between these parts?

A: The ICO-640-STT is rated for 1 A per contact. The 110-99-640-41-001000 is rated for 3 A per contact. For applications requiring current levels between 1 A and 3 A per contact, the Mill-Max substitute provides additional capacity.

Q: Are the housing materials equivalent?

A: The ICO-640-STT uses polyester with glass filler. The 110-99-640-41-001000 uses polycyclohexylenedimethylene terephthalate (PCT) polyester. Both materials are thermoplastic polymers suitable for through-hole socket applications. Material selection may affect mechanical properties and thermal performance in specific environments.

Q: What is the significance of the Moisture Sensitivity Level (MSL) rating?

A: The 110-99-640-41-001000 carries an MSL rating of 1 (Unlimited), indicating no moisture sensitivity restrictions for storage and handling. The ICO-640-STT does not specify an MSL rating. This difference is relevant for supply chain management and storage conditions but does not affect functional compatibility.