ICO-426-S8A-T Equivalent & Substitute Parts

Part Overview

The ICO-426-S8A-T is a 42-position DIP socket manufactured by 3M, designed for through-hole mounting of dual inline package integrated circuits. This component features a 0.6" (15.24mm) row spacing with tin-plated phosphor bronze contacts and operates across a temperature range of -65°C to 105°C. The product is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and component procurement.

Substiute Parts

ICO-426-S8A-T

3MIn Stock: 809ICO-426-S8A-T Datasheet

Current PartRFQ

104-13-642-41-770000

Mill-Max Manufacturing Corp.In Stock: 1019104-13-642-41-770000 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ICO-426-S8A-T is determined by the following critical parameters that must remain constant:

• Number of Positions: 42 (2 x 21)
• Row Spacing: 0.6" (15.24mm)
• Pitch - Mating: 0.100" (2.54mm)
• Mounting Type: Through Hole
• Features: Open Frame

The substitute part 104-13-642-41-770000 (Mill-Max Manufacturing Corp.) satisfies all these core mechanical and electrical compatibility requirements. While contact finish, contact material, and termination method differ between the main part and substitute, these variations remain within acceptable parameters for DIP socket substitution when the fundamental dimensional and positional specifications align.

Parameter Comparison

Engineering Selection Recommendations

The ICO-426-S8A-T is obsolete and no longer supported by the original manufacturer. The substitute part 104-13-642-41-770000 provides mechanical and electrical compatibility based on matching positional count, row spacing, and pitch specifications.

Key considerations for selection:

• The substitute part is active and manufactured by Mill-Max Manufacturing Corp., ensuring ongoing availability and supply chain continuity.
• The substitute achieves ROHS3 compliance, whereas the original part is RoHS non-compliant. This distinction is significant for applications subject to regulatory requirements.
• The substitute offers a higher current rating (3 A versus 1 A), providing additional electrical capacity.
• Termination method differs: the original uses solder termination while the substitute uses press-fit termination. Both methods are suitable for through-hole mounting applications.
• Contact finish differs (tin versus gold plating). Gold-plated contacts provide enhanced corrosion resistance and contact reliability compared to tin plating.

Frequently Asked Questions (FAQ)

Q: Can the 104-13-642-41-770000 be used as a direct replacement for the ICO-426-S8A-T?

A: Yes, the 104-13-642-41-770000 is mechanically and electrically compatible. Both sockets accommodate 42-position DIP packages with 0.6" row spacing and 0.100" mating pitch. The primary differences are contact finish, contact material, and termination method, which do not prevent functional substitution in standard DIP socket applications.

Q: What is the impact of the different termination methods?

A: The original ICO-426-S8A-T uses solder termination, while the substitute 104-13-642-41-770000 uses press-fit termination. Both methods are established through-hole mounting techniques. Press-fit termination offers the advantage of mechanical retention without requiring solder reflow, while solder termination provides a permanent electrical connection. Selection depends on your assembly process and equipment capabilities.

Q: Does the higher current rating of the substitute part affect compatibility?

A: No. The substitute part's 3 A current rating exceeds the original 1 A specification. This represents an improvement in electrical capacity and does not create compatibility issues. The substitute can safely handle applications designed for the original 1 A rating.

Q: Are there any compliance considerations when substituting?

A: Yes. The substitute part is ROHS3 compliant, whereas the original is RoHS non-compliant. If your application or market requires RoHS compliance, the substitute part satisfies this requirement. If your application explicitly requires non-compliant components, this distinction must be evaluated against your specific requirements.

Q: What is the significance of the gold plating on the substitute part?

A: Gold plating on the mating contacts provides superior corrosion resistance and contact reliability compared to tin plating. This is particularly beneficial in environments with moisture, temperature cycling, or extended storage periods. The gold-plated contacts maintain lower contact resistance over the component's operational lifetime.