PX-52LCC PLCC Socket 52-Position Equivalent & Substitute Parts

Part Overview

The PX-52LCC is a 52-position leadless chip carrier (PLCC) socket manufactured by Kycon, Inc., designed for through-hole mounting applications. This component features tin-plated phosphor bronze contacts with a 0.050" (1.27mm) mating pitch and 0.100" (2.54mm) post pitch. The part is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing design support and production continuity.

Substiute Parts

PX-52LCC

Kycon, Inc.In Stock: 725PX-52LCC Datasheet

Current PartRFQ

8452-11B1-RK-TP

3MIn Stock: 24478452-11B1-RK-TP Datasheet

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A-CCS 052-Z-T

Assmann WSW ComponentsIn Stock: 859A-CCS 052-Z-T Datasheet

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PLCC-52-AT

Adam TechIn Stock: 1277PLCC-52-AT Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the PX-52LCC is determined by strict alignment of the following critical parameters:

• Position Count & Grid: 52 positions in 4 x 13 configuration (non-negotiable)
• Mating Pitch: 0.050" (1.27mm) (non-negotiable)
• Contact Finish - Mating: Tin (required for compatibility)
• Contact Material - Mating: Phosphor Bronze or Copper Alloy (functionally equivalent)
• Mounting Type: Through Hole (required)
• Housing Material: Polybutylene Terephthalate (PBT) with or without glass fill
• Termination: Solder (required)
• Features: Closed Frame (required)
• Material Flammability Rating: UL94 V-0 (required)
• Moisture Sensitivity Level: 1 (Unlimited) (required)

All three substitute parts meet these core criteria. Variations in post pitch (0.050" vs. 0.100"), operating temperature range, contact resistance, and contact finish thickness represent secondary differences that do not preclude substitution but require PCB layout verification.

Parameter Comparison

Engineering Selection Recommendations

All three substitute parts are functionally compatible with the PX-52LCC based on core electrical and mechanical parameters. Selection should be based on the following criteria:

8452-11B1-RK-TP (3M): This part offers the widest operating temperature range (-40°C ~ 105°C) and is currently in active production status with high inventory availability (2357 pcs). The primary design consideration is the post pitch of 0.050" (1.27mm), which differs from the original 0.100" (2.54mm). PCB layout modification is required for this substitution.

A-CCS 052-Z-T (Assmann WSW Components): This part maintains the original post pitch of 0.100" (2.54mm), minimizing PCB layout changes. It features phosphor bronze contacts matching the original specification and is actively produced with moderate inventory (783 pcs). Operating temperature range extends to 105°C, exceeding the original specification.

PLCC-52-AT (Adam Tech): This part preserves the original post pitch of 0.100" (2.54mm) and offers the broadest operating temperature range (-55°C ~ 105°C). It is actively produced with good inventory availability (1235 pcs). The termination post length is 0.126" (3.20mm), which is 0.006" shorter than the original specification, requiring PCB hole depth verification.

All substitute parts carry ROHS3 compliance and unlimited moisture sensitivity rating, meeting modern regulatory requirements.

Frequently Asked Questions (FAQ)

Q: Can the 8452-11B1-RK-TP be used as a direct replacement without PCB modification?

A: No. The 8452-11B1-RK-TP has a post pitch of 0.050" (1.27mm) compared to the original 0.100" (2.54mm). PCB layout modification is required to accommodate the different through-hole spacing.

Q: Which substitute maintains the closest mechanical compatibility with the original PX-52LCC?

A: Both A-CCS 052-Z-T and PLCC-52-AT maintain the original post pitch of 0.100" (2.54mm). The A-CCS 052-Z-T is the closest match, with identical termination post length of 0.132" (3.35mm). The PLCC-52-AT has a post length of 0.126" (3.20mm), requiring verification of PCB hole depth specifications.

Q: Are all substitute parts RoHS compliant?

A: Yes. All three substitute parts are ROHS3 compliant, meeting current regulatory requirements. The original PX-52LCC is RoHS compliant under the earlier standard.

Q: What is the difference between phosphor bronze and copper alloy contacts?

A: Both materials are acceptable for PLCC socket applications. Phosphor bronze (used in PX-52LCC, A-CCS 052-Z-T, and PLCC-52-AT) and copper alloy (used in 8452-11B1-RK-TP) provide equivalent electrical performance and contact reliability for this application.

Q: Does the contact resistance difference between parts affect circuit performance?

A: The PX-52LCC and A-CCS 052-Z-T both specify 15mOhm contact resistance. The PLCC-52-AT specifies 30mOhm. The 8452-11B1-RK-TP does not specify contact resistance. For high-current or precision applications, contact resistance should be evaluated against circuit requirements.

Q: Can I use the PLCC-52-AT if my PCB is designed for the original post length of 0.132"?

A: The PLCC-52-AT has a post length of 0.126" (3.20mm), which is 0.006" shorter. PCB hole depth and solder fillet specifications must be verified to ensure adequate solder joint formation and mechanical strength.

Q: Which substitute part has the best long-term availability?

A: All three parts are currently in active production status. The 8452-11B1-RK-TP (3M) has the highest current inventory (2357 pcs), followed by PLCC-52-AT (1235 pcs) and A-CCS 052-Z-T (783 pcs). For long-term supply assurance, contact the respective manufacturers directly.