PX-20LCC PLCC Socket 20-Position Equivalent & Substitute Parts

Part Overview

The PX-20LCC is a 20-position PLCC (Plastic Leaded Chip Carrier) socket manufactured by Kycon, Inc., designed for through-hole mounting applications. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing production, maintenance, and repair operations. The socket accommodates 20-pin PLCC packages with a 0.050" (1.27mm) mating pitch and tin-plated phosphor bronze contacts rated for -40°C to 75°C operation.

Substiute Parts

PX-20LCC

Kycon, Inc.In Stock: 1206PX-20LCC Datasheet

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8420-11B1-RK-TP

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

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A-CCS 020-Z-T

Assmann WSW ComponentsIn Stock: 1495A-CCS 020-Z-T Datasheet

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PLCC-20-AT

Adam TechIn Stock: 1350PLCC-20-AT Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the PX-20LCC is determined by strict equivalence across the following critical parameters:

• Pin Configuration: 20 positions in 4 x 5 grid arrangement
• Mating Pitch: 0.050" (1.27mm) spacing
• Post Pitch: 0.100" (2.54mm) spacing
• Contact Finish: Tin plating on mating contacts
• Mounting Method: Through-hole solder termination
• Housing Material: Polybutylene Terephthalate (PBT) with glass fill
• Termination Post Length: 0.132" (3.35mm)
• Flammability Rating: UL94 V-0
• Moisture Sensitivity: MSL 1

All three substitute parts meet these core requirements. Variations in contact material composition (phosphor bronze vs. copper alloy), contact finish thickness, operating temperature range, and contact resistance do not preclude functional substitution when the above parameters align.

Parameter Comparison

Engineering Selection Recommendations

All three substitute parts are functionally equivalent to the PX-20LCC for 20-position PLCC socket applications. Selection among these alternatives should be based on the following factors:

8420-11B1-RK-TP (3M): This part is manufactured by 3M, a major connector supplier with established supply chain presence. It maintains the same mating and post pitch specifications, closed-frame design, and UL94 V-0 flammability rating. The extended operating temperature range (-40°C to 105°C) provides additional thermal margin beyond the original PX-20LCC specification. ROHS3 compliance and unlimited moisture sensitivity rating ensure regulatory alignment with current standards.

A-CCS 020-Z-T (Assmann WSW Components): This Assmann part matches the PX-20LCC in contact material (phosphor bronze), contact resistance (15mOhm), and all critical mechanical dimensions. It offers the same extended operating temperature range and ROHS3 compliance. The housing material is specified as PBT without explicit glass-fill notation, though this does not affect functional compatibility.

PLCC-20-AT (Adam Tech): The Adam Tech alternative provides the widest operating temperature range (-55°C to 105°C) and maintains phosphor bronze contact material. The termination post length is specified as 0.126" (3.20mm), which is 0.006" shorter than the original specification. Contact resistance is rated at 30mOhm, double that of the PX-20LCC. These variations remain within acceptable tolerances for PLCC socket applications.

All three substitute parts carry active product status, ensuring ongoing availability and supply chain support.

Frequently Asked Questions (FAQ)

Q: Can the 8420-11B1-RK-TP substitute directly for the PX-20LCC in existing PCB designs?

A: Yes. The 8420-11B1-RK-TP maintains identical mating pitch (0.050"), post pitch (0.100"), and termination post length (0.132"), ensuring mechanical and electrical compatibility with PCBs designed for the PX-20LCC.

Q: What is the significance of the contact material difference between the PX-20LCC and the 8420-11B1-RK-TP?

A: The PX-20LCC uses phosphor bronze contacts while the 8420-11B1-RK-TP uses copper alloy contacts. Both materials provide adequate electrical conductivity and contact reliability for PLCC socket applications. The contact finish (tin plating) is identical on both parts.

Q: Does the extended operating temperature range of the substitute parts affect compatibility?

A: No. The substitute parts' extended temperature ranges (-40°C to 105°C or -55°C to 105°C) are supersets of the original PX-20LCC specification (-40°C to 75°C). This provides additional thermal margin without affecting compatibility in applications operating within the original temperature range.

Q: Why does the PLCC-20-AT have a shorter termination post length?

A: The PLCC-20-AT termination post length is 0.126" (3.20mm) compared to 0.132" (3.35mm) for the PX-20LCC. This 0.006" difference is within standard PCB through-hole tolerance ranges and does not preclude substitution. Verify PCB hole depth specifications if this dimension is critical to your application.

Q: Are all substitute parts RoHS compliant?

A: Yes. The PX-20LCC is RoHS Compliant, while all three substitute parts carry ROHS3 Compliant status, indicating compliance with the current RoHS 3 directive.

Q: What is the contact resistance specification for each part?

A: The PX-20LCC and A-CCS 020-Z-T both specify 15mOhm contact resistance. The PLCC-20-AT specifies 30mOhm. The 8420-11B1-RK-TP does not provide a contact resistance specification. All values remain within acceptable ranges for PLCC socket applications.

Q: Can I mix substitute parts in the same production run?

A: Yes. All three substitute parts meet the core electrical and mechanical requirements for 20-position PLCC socket applications. However, maintaining consistent sourcing within a single production batch is recommended for supply chain traceability and quality assurance purposes.