A-CCS28-Z PLCC 28-Position Socket - Equivalent & Substitute Parts

Part Overview

The A-CCS28-Z is a 28-position PLCC socket manufactured by Assmann WSW Components, designed for through-hole mounting applications. This component features a closed frame construction with tin-plated phosphor bronze contacts and is rated for 1 A continuous current. The part is currently classified as obsolete, making identification of suitable substitute components essential for ongoing production and maintenance applications. Active equivalent parts are available from the same manufacturer and qualified alternative sources.

Substiute Parts

A-CCS28-Z

Assmann WSW ComponentsIn Stock: 1125A-CCS28-Z Datasheet

Current PartRFQ

A-CCS 028-Z-T

Assmann WSW ComponentsIn Stock: 1703A-CCS 028-Z-T Datasheet

DirectRFQ

8428-11B1-RK-TP

3MIn Stock: 22388428-11B1-RK-TP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the A-CCS28-Z is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

• Type: PLCC socket configuration
• Number of Positions: 28 (4 x 7) grid
• Pitch - Mating: 0.050" (1.27mm)
• Pitch - Post: 0.100" (2.54mm)
• Mounting Type: Through Hole
• Contact Finish: Tin plating
• Current Rating: 1 A minimum
• Flammability Rating: UL94 V-0

Allowable Variations:

• Product Status: Obsolete parts may be replaced with Active status equivalents
• Contact Finish Thickness: Minor variations within specification tolerance
• Operating Temperature Range: Substitute may have narrower range if application requirements are met
• Contact Resistance: Lower values are acceptable
• Housing Material: Glass-filled or unfilled PBT are functionally equivalent

Two substitute parts meet these criteria: A-CCS 028-Z-T (Assmann WSW Components) and 8428-11B1-RK-TP (3M Series 8400).

Parameter Comparison

Engineering Selection Recommendations

A-CCS 028-Z-T (Assmann WSW Components) is the primary substitute for the A-CCS28-Z. This part maintains identical mechanical and electrical specifications while offering active product status and ROHS3 compliance. The contact resistance is improved at 15mOhm compared to the original 30mOhm specification. The operating temperature range is narrower (-40°C to 105°C versus -55°C to 105°C); applications requiring operation below -40°C must retain the original part or evaluate the 3M alternative. This part is available in Tube packaging with 1660 units in stock.

8428-11B1-RK-TP (3M Series 8400) is a qualified alternative from 3M. This part meets all critical electrical and mechanical parameters with identical pin configuration, pitch, current rating, and flammability certification. The contact material differs (Copper Alloy versus Phosphor Bronze), which is acceptable for PLCC socket applications. Operating temperature range matches the Assmann substitute at -40°C to 105°C. This part is ROHS3 compliant with 2219 units in stock.

For new designs and production requiring RoHS compliance, either substitute is acceptable. For legacy systems requiring operation below -40°C, the original A-CCS28-Z must be sourced or the application thermal requirements must be re-evaluated.

Frequently Asked Questions (FAQ)

Q: Can A-CCS 028-Z-T be used as a direct replacement for A-CCS28-Z in existing assemblies?

A: Yes. Both parts share identical PLCC 28-position configuration, 0.050" mating pitch, 0.100" post pitch, and 1 A current rating. The primary consideration is the operating temperature range: A-CCS 028-Z-T operates from -40°C to 105°C, while the original operates from -55°C to 105°C. If your application does not require operation below -40°C, this part is a direct substitute.

Q: What is the difference between the Assmann and 3M substitute parts?

A: Both parts are mechanically and electrically equivalent for PLCC socket applications. The primary differences are: (1) Contact material: Assmann uses Phosphor Bronze; 3M uses Copper Alloy. (2) Housing material: Assmann A-CCS 028-Z-T uses unfilled PBT; 3M uses glass-filled PBT. (3) Manufacturer: Different suppliers with different inventory levels. All other parameters, including pin count, pitch, current rating, and flammability rating, are identical.

Q: Are there packaging differences between the main part and substitutes?

A: Yes. The original A-CCS28-Z does not specify packaging type. A-CCS 028-Z-T is supplied in Tube packaging. 8428-11B1-RK-TP is also supplied in Tube packaging. Confirm packaging requirements for your assembly process before selection.

Q: Why is the contact resistance lower in the substitute parts?

A: A-CCS 028-Z-T specifies 15mOhm contact resistance compared to 30mOhm in the original. Lower contact resistance is a performance improvement and does not affect compatibility. The 3M part does not specify contact resistance but meets all electrical requirements.

Q: Can I use these substitutes if my design requires RoHS compliance?

A: Yes. Both A-CCS 028-Z-T and 8428-11B1-RK-TP are ROHS3 compliant. The original A-CCS28-Z is RoHS non-compliant. If your application or customer requirements mandate RoHS compliance, use either substitute part.

Q: What is the impact of the narrower operating temperature range in the substitutes?

A: The substitutes operate from -40°C to 105°C versus -55°C to 105°C for the original. If your application requires operation below -40°C, the substitutes are not suitable. Evaluate whether your actual operating environment requires this extended low-temperature range before making a final selection.