PX-84LCC PLCC Socket 84-Position Equivalent & Substitute Parts

Part Overview

The PX-84LCC is an 84-position PLCC (Plastic Leaded Chip Carrier) socket manufactured by Kycon, Inc., designed for through-hole mounting applications. This component is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing production support, repair operations, and legacy system maintenance. The socket accommodates 84-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.

Key Parameters

Parameter	Value
Part Number	PX-84LCC
Manufacturer	Kycon, Inc.
Type	PLCC Socket
Pin Count	84 (4 x 21)
Mating Pitch	0.050" (1.27mm)
Post Pitch	0.100" (2.54mm)
Mounting Type	Through Hole
Contact Finish (Mating)	Tin
Contact Material (Mating)	Phosphor Bronze
Housing Material	Polybutylene Terephthalate (PBT), Glass Filled
Operating Temperature	-40°C ~ 75°C
Termination Post Length	0.132" (3.35mm)
Flammability Rating	UL94 V-0
Contact Resistance	15mOhm
RoHS Status	RoHS Compliant
Moisture Sensitivity Level	1 (Unlimited)
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution eligibility for the PX-84LCC is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

Pin count: 84 positions (4 x 21 grid)
Socket type: PLCC
Mating pitch: 0.050" (1.27mm)
Post pitch: 0.100" (2.54mm)
Mounting type: Through hole
Contact finish (mating): Tin
Housing material: Polybutylene Terephthalate (PBT)
Flammability rating: UL94 V-0
Termination: Solder
Moisture sensitivity level: 1 (Unlimited)

Acceptable Variation Parameters:

Operating temperature range (substitute may exceed original specification)
Contact finish thickness (substitute may differ if within industry standards)
Contact material (phosphor bronze or copper alloy acceptable)
Termination post length (minor tolerance variations acceptable within 0.006" range)
Contact resistance (substitute may differ if within acceptable limits)
Product status (active substitutes acceptable for obsolete originals)
RoHS compliance level (ROHS3 acceptable for RoHS Compliant)

All three identified substitutes meet these criteria and are therefore electrically and mechanically compatible with the PX-84LCC.

Parameter Comparison

Parameter	PX-84LCC (Kycon)	8484-11B1-RK-TP (3M)	A-CCS 084-Z-T (Assmann)	PLCC-84-AT (Adam Tech)
Pin Count	84 (4 x 21)	84 (4 x 21)	84 (4 x 21)	84 (4 x 21)
Type	PLCC	PLCC	PLCC	PLCC
Mating Pitch	0.050" (1.27mm)	0.050" (1.27mm)	0.050" (1.27mm)	0.050" (1.27mm)
Post Pitch	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole
Contact Finish (Mating)	Tin	Tin	Tin	Tin
Contact Material (Mating)	Phosphor Bronze	Copper Alloy	Phosphor Bronze	Phosphor Bronze
Contact Finish Thickness (Mating)	—	160.0µin (4.06µm)	160.0µin (4.06µm)	80.0µin (2.03µm)
Housing Material	PBT, Glass Filled	PBT, Glass Filled	PBT	PBT, Glass Filled
Operating Temperature	-40°C ~ 75°C	-40°C ~ 105°C	-40°C ~ 105°C	-55°C ~ 105°C
Termination Post Length	0.132" (3.35mm)	0.132" (3.35mm)	0.132" (3.35mm)	0.126" (3.20mm)
Flammability Rating	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0
Contact Resistance	15mOhm	—	15mOhm	30mOhm
Current Rating	—	1 A	1 A	1 A
RoHS Status	RoHS Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Obsolete	Active	Active	Active

Engineering Selection Recommendations

All three substitute parts are functionally equivalent to the PX-84LCC and meet the mandatory electrical and mechanical compatibility criteria. Selection among these alternatives should be based on the following factors:

8484-11B1-RK-TP (3M): Active product status with extended operating temperature range (-40°C to 105°C), providing thermal margin beyond the original specification. Copper alloy contact material is electrically equivalent to phosphor bronze. Tin contact finish thickness of 160.0µin meets industry durability standards. Suitable for applications requiring long-term supply chain continuity.

A-CCS 084-Z-T (Assmann WSW Components): Active product with identical contact material (phosphor bronze) and matching contact resistance (15mOhm) to the original. Extended operating temperature range (-40°C to 105°C) and ROHS3 compliance. Provides direct electrical and thermal performance equivalence with improved availability.

PLCC-84-AT (Adam Tech): Active product with widest operating temperature range (-55°C to 105°C), offering maximum thermal margin. Phosphor bronze contacts with UL94 V-0 rating. Termination post length of 0.126" represents a 0.006" reduction from the original specification; verify PCB pad design accommodates this tolerance before selection. Contact resistance of 30mOhm is within acceptable limits for PLCC socket applications.

All three substitutes carry ROHS3 compliance, exceeding the original RoHS Compliant status, and maintain MSL 1 (Unlimited) moisture sensitivity rating.

Frequently Asked Questions (FAQ)

Q: Can I use any of these substitute parts as a direct replacement for the PX-84LCC?

A: Yes. All three substitute parts meet the mandatory electrical and mechanical compatibility parameters: 84-pin PLCC configuration, 0.050" mating pitch, 0.100" post pitch, through-hole mounting, tin-plated contacts, UL94 V-0 flammability rating, and MSL 1 moisture sensitivity. Physical footprint and electrical performance are equivalent.

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

A: Both materials provide equivalent electrical conductivity and contact reliability for PLCC socket applications. Phosphor bronze offers slightly enhanced spring properties and corrosion resistance. The 3M substitute uses copper alloy contacts, which are functionally interchangeable with the phosphor bronze contacts in the original and other substitutes.

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

A: The substitute parts are rated to -40°C to 105°C, compared to the original -40°C to 75°C. This represents improved material formulation and manufacturing processes in active products. The higher rating does not affect compatibility; it provides additional thermal margin for applications operating near temperature extremes.

Q: Does the 0.006" difference in termination post length on the Adam Tech part affect compatibility?

A: The Adam Tech PLCC-84-AT has a termination post length of 0.126" versus the original 0.132". This 0.006" reduction is within typical PCB pad design tolerances for through-hole sockets. Verify your PCB pad depth and solder fillet requirements before selection. Contact your PCB manufacturer if uncertainty exists.

Q: Are all substitutes RoHS compliant?

A: Yes. All three substitutes carry ROHS3 compliance, which exceeds the original RoHS Compliant designation. ROHS3 represents the current regulatory standard and ensures compliance with current and future environmental directives.

Q: Which substitute offers the best long-term availability?

A: All three substitutes are classified as active products, indicating current manufacturing and distribution. 3M (8484-11B1-RK-TP) and Assmann WSW Components (A-CCS 084-Z-T) are established connector manufacturers with broad distribution networks. Adam Tech (PLCC-84-AT) is also an active supplier. Verify current inventory and lead times with your component distributor for your specific procurement timeline.

Q: Can I mix different substitute parts in the same assembly?

A: Yes. All substitutes are electrically and mechanically equivalent. Mixing different manufacturers in the same assembly does not create compatibility issues. However, for manufacturing consistency and traceability, using a single substitute part number per assembly is recommended.

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