CNC Tech 232-28 PLCC Socket – Equivalent & Substitute Parts

Part Overview

The CNC Tech 232-28 is a 28-position PLCC socket designed for surface mount applications with tin-plated phosphor bronze contacts. This component is classified as obsolete, making equivalent substitute parts necessary for ongoing production and maintenance requirements. The socket accommodates 28-pin PLCC packages in a 4×7 grid configuration with 0.050" (1.27mm) pitch spacing.

Substiute Parts

232-28

CNC TechIn Stock: 909232-28 Datasheet

Current PartRFQ

940-44-028-17-400000

Mill-Max Manufacturing Corp.In Stock: 1567940-44-028-17-400000 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The Mill-Max Manufacturing Corp. 940-44-028-17-400000 qualifies as a direct substitute for the CNC Tech 232-28 based on the following critical parameters:

Matching Parameters:

• 28-position PLCC socket configuration (4 × 7 grid)
• 0.050" (1.27mm) mating pitch
• 0.050" (1.27mm) post pitch
• Tin contact finish on both mating and post surfaces
• Surface mount termination with solder
• Closed frame design
• 1 A current rating
• 30 mOhm contact resistance
• UL94 V-0 flammability rating
• ROHS3 compliance
• MSL 1 (Unlimited) moisture sensitivity

Differences:

• Contact material: Beryllium Copper (mating) and Brass Alloy (post) versus Phosphor Bronze
• Contact finish thickness: Higher on both mating (150.0µin vs. 100.0µin) and post (200.0µin vs. 100.0µin)
• Operating temperature upper limit: 125°C versus 105°C
• Housing material: PCT Polyester versus PPS Glass Filled
• Product status: Active versus Obsolete

These differences do not prevent functional substitution within the specified electrical and mechanical parameters.

Parameter Comparison

Engineering Selection Recommendations

The Mill-Max 940-44-028-17-400000 is suitable as a substitute for the CNC Tech 232-28 in applications requiring a 28-position PLCC socket with surface mount termination. Both components meet ROHS3 compliance and UL94 V-0 flammability requirements. The Mill-Max part offers the advantage of active product status, ensuring continued availability and supply chain reliability. The extended operating temperature range of the Mill-Max component (to 125°C) provides additional thermal margin compared to the CNC Tech original (105°C maximum). Both parts maintain identical electrical specifications including 1 A current rating and 30 mOhm contact resistance, supporting direct functional replacement in existing designs.

Frequently Asked Questions (FAQ)

Q: Can the Mill-Max 940-44-028-17-400000 be used as a direct replacement for the CNC Tech 232-28?

A: Yes. Both components share identical pin counts (28 positions in 4×7 configuration), pitch spacing (0.050" mating and post), contact finish (tin), current rating (1 A), contact resistance (30 mOhm), and flammability rating (UL94 V-0). The Mill-Max part is functionally compatible for surface mount PLCC socket applications.

Q: What are the differences between these two parts?

A: The primary differences are contact materials (Beryllium Copper and Brass Alloy versus Phosphor Bronze), contact finish thickness (higher on the Mill-Max part), operating temperature upper limit (125°C versus 105°C), housing material composition, and product status (active versus obsolete).

Q: Does the difference in contact material affect compatibility?

A: No. Both contact material sets meet the specified electrical parameters (1 A current rating, 30 mOhm contact resistance) and maintain tin surface finish. The different base materials do not prevent functional substitution within the defined electrical and mechanical specifications.

Q: Are both parts RoHS compliant?

A: Yes. Both the CNC Tech 232-28 and Mill-Max 940-44-028-17-400000 are ROHS3 compliant.

Q: What is the packaging difference?

A: The CNC Tech 232-28 packaging is not specified in the available data. The Mill-Max 940-44-028-17-400000 is supplied in tube packaging.

Q: Which part should be selected for new designs?

A: The Mill-Max 940-44-028-17-400000 is recommended for new designs due to its active product status, ensuring long-term availability and supply chain continuity. The extended operating temperature range also provides additional design margin.