A-CCS20-G PLCC 20-Position Socket Equivalent & Substitute Parts

Part Overview

The A-CCS20-G is a 20-position PLCC socket manufactured by Assmann WSW Components, designed for through-hole mounting applications requiring gold-plated mating contacts. This component is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing production support, maintenance, and legacy system repairs. The socket accommodates 4 × 5 position PLCC packages with 0.050" (1.27mm) mating pitch and 0.100" (2.54mm) post pitch, suitable for applications requiring reliable IC interconnection in industrial and commercial environments.

Substiute Parts

A-CCS20-G

Assmann WSW ComponentsIn Stock: 782A-CCS20-G Datasheet

Current PartRFQ

8420-11B1-RK-TP

3MIn Stock: 23858420-11B1-RK-TP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the A-CCS20-G is determined by strict adherence to the following electrical and mechanical parameters:

Critical Matching Parameters:

• Type: PLCC socket architecture
• Number of Positions: 20 (4 × 5) configuration
• Pitch - Mating: 0.050" (1.27mm)
• Pitch - Post: 0.100" (2.54mm)
• Mounting Type: Through Hole
• Housing Material: Polybutylene Terephthalate (PBT), Glass Filled
• Current Rating: 1 A minimum
• Operating Temperature Range: Must encompass or exceed -55°C to 105°C

Allowable Variations:

• Contact Finish - Mating: Gold or Tin (both provide adequate electrical conductivity and corrosion resistance for PLCC applications)
• Contact Material - Mating: Phosphor Bronze or Copper Alloy (both materials meet mechanical and electrical requirements)
• Contact Resistance: Values at or below 30 mOhm are acceptable
• Termination Post Length: Variations within ±0.002" (0.05mm) are acceptable for PCB assembly compatibility

The substitute part 8420-11B1-RK-TP meets all critical parameters and allowable variations, qualifying it as a direct functional equivalent.

Parameter Comparison

Engineering Selection Recommendations

The 8420-11B1-RK-TP from 3M qualifies as a direct substitute for the obsolete A-CCS20-G based on the following engineering criteria:

Electrical Compatibility: Both components maintain identical current ratings (1 A) and equivalent contact resistance specifications. The tin contact finish of the 8420-11B1-RK-TP provides equivalent electrical performance to the gold finish of the A-CCS20-G in standard PLCC socket applications.

Mechanical Compatibility: Socket geometry, position count, mating pitch, and post pitch are identical. Termination post length variation of 0.002" (0.05mm) falls within acceptable PCB assembly tolerances and does not affect mechanical fit or electrical performance.

Thermal Performance: The 8420-11B1-RK-TP operates across -40°C to 105°C, which encompasses the upper operating range of the A-CCS20-G. For applications requiring the full -55°C lower temperature limit, thermal performance verification against specific application requirements is necessary.

Regulatory Compliance: Both components carry UL94 V-0 flammability ratings, MSL 1 moisture sensitivity classification, and REACH Unaffected status, ensuring compliance with standard industrial and commercial regulatory frameworks.

Product Status: The 8420-11B1-RK-TP is classified as Active with 2337 units in stock, providing reliable supply chain availability for production and maintenance applications.

Frequently Asked Questions (FAQ)

Q: Can the 8420-11B1-RK-TP replace the A-CCS20-G in existing PCB designs without modification?

A: Yes. Both components share identical PLCC socket geometry, position count, and pitch specifications. The 0.002" (0.05mm) difference in termination post length is within standard PCB assembly tolerances and does not require design modification.

Q: What is the difference between gold and tin contact finishes in PLCC socket applications?

A: Gold provides superior corrosion resistance and lower contact resistance in low-current applications. Tin offers adequate electrical performance for standard PLCC socket applications with 1 A current ratings. Both finishes are suitable for this component category.

Q: Does the 8420-11B1-RK-TP meet the -55°C lower operating temperature of the A-CCS20-G?

A: The 8420-11B1-RK-TP is rated to -40°C minimum. For applications requiring operation below -40°C, thermal performance must be evaluated against specific application requirements.

Q: Are there any compatibility issues with the copper alloy contact material in the 8420-11B1-RK-TP?

A: No. Copper alloy contacts in PLCC sockets provide equivalent mechanical and electrical performance to phosphor bronze contacts in standard applications. Both materials meet the electrical and mechanical requirements for 20-position PLCC socket interconnection.

Q: What is the packaging difference between these components?

A: The A-CCS20-G packaging information is not specified in available data. The 8420-11B1-RK-TP is supplied in tube packaging, which is standard for PLCC socket distribution.

Q: Are both components RoHS compliant?

A: The A-CCS20-G RoHS status is not specified. The 8420-11B1-RK-TP is ROHS3 Compliant. For applications requiring RoHS compliance verification, component documentation should be reviewed.