A-CCS68-Z-SM PLCC 68-Position Socket Equivalent & Substitute Parts

Part Overview

The A-CCS68-Z-SM is a 68-position PLCC socket manufactured by Assmann WSW Components, designed for surface mount applications with tin-plated contacts and closed frame construction. This component is classified as obsolete, making equivalent substitute parts necessary for ongoing production and maintenance applications. The socket accommodates 68 pins in a 4 × 17 grid configuration with 0.050" (1.27mm) pitch mating contacts.

Substiute Parts

A-CCS68-Z-SM

Assmann WSW ComponentsIn Stock: 680A-CCS68-Z-SM Datasheet

Current PartRFQ

940-44-068-17-400000

Mill-Max Manufacturing Corp.In Stock: 1879940-44-068-17-400000 Datasheet

MFR RecommendedRFQ

940-44-068-17-400004

Mill-Max Manufacturing Corp.In Stock: 898940-44-068-17-400004 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the A-CCS68-Z-SM is determined by strict equivalence across the following critical parameters:

• Socket Type & Configuration: PLCC socket with 68 positions in 4 × 17 grid arrangement
• Pitch Specification: 0.050" (1.27mm) mating pitch
• Contact Finish: Tin plating on mating contacts
• Mounting Method: Surface mount termination with solder connection
• Frame Design: Closed frame construction
• Electrical Performance: 1 A current rating and 30mOhm contact resistance
• Environmental Rating: UL94 V-0 flammability classification

The substitute parts listed below meet all these core parameters. Variations in contact material composition, post finish thickness, housing polymer type, and operating temperature ceiling do not affect functional interchangeability within the specified electrical and mechanical constraints.

Parameter Comparison

Engineering Selection Recommendations

Both Mill-Max substitute parts (940-44-068-17-400000 and 940-44-068-17-400004) are functionally equivalent to the obsolete A-CCS68-Z-SM across all critical electrical and mechanical parameters. The substitute parts offer the following advantages:

• Active Product Status: Both Mill-Max parts are in active production, ensuring long-term availability and supply chain continuity.
• Enhanced Compliance: Mill-Max substitutes are ROHS3 compliant, whereas the original Assmann part is RoHS non-compliant.
• Extended Operating Temperature: Mill-Max parts support -55°C ~ 125°C, providing a 20°C higher upper temperature limit compared to the original -55°C ~ 105°C specification.
• Improved Post Finish: Increased tin plating thickness on posts (200.0µin vs. 150.0µin) enhances solder joint durability.

Selection between 940-44-068-17-400000 (Tube packaging) and 940-44-068-17-400004 (Tape & Reel packaging) depends on production volume and assembly process requirements. Both parts are electrically and mechanically interchangeable with the A-CCS68-Z-SM.

Frequently Asked Questions (FAQ)

Q: Are the Mill-Max 940-44 series sockets pin-compatible with the A-CCS68-Z-SM?

A: Yes. Both substitute parts maintain identical 68-position PLCC configuration with 0.050" (1.27mm) pitch mating contacts, closed frame design, and solder termination. Pin-to-pin compatibility is assured.

Q: What is the difference between 940-44-068-17-400000 and 940-44-068-17-400004?

A: The primary difference is packaging format. Part 940-44-068-17-400000 is supplied in Tube packaging, while 940-44-068-17-400004 is supplied in Tape & Reel (TR) format. Electrical and mechanical specifications are identical. Tape & Reel packaging is typically preferred for high-volume automated assembly operations.

Q: Does the change in contact material from Phosphor Bronze to Beryllium Copper affect performance?

A: No. Both materials meet the specified 30mOhm contact resistance and 1 A current rating. Beryllium Copper in the Mill-Max substitutes provides equivalent electrical performance with enhanced mechanical durability.

Q: Why do the substitute parts have a higher operating temperature range?

A: The Mill-Max substitutes support -55°C ~ 125°C versus the original -55°C ~ 105°C. This extended range is a material and design improvement in the substitute parts and does not affect compatibility with applications operating within the original temperature specification.

Q: Are the substitute parts RoHS compliant?

A: Yes. Both Mill-Max parts (940-44-068-17-400000 and 940-44-068-17-400004) are ROHS3 compliant, whereas the original A-CCS68-Z-SM is RoHS non-compliant. This compliance improvement may be required for new designs or regulatory requirements.

Q: Can I use these substitutes in existing PCB designs without modification?

A: Yes. The substitute parts are direct mechanical and electrical replacements. No PCB layout or design changes are required. Footprint compatibility is maintained across all three parts.