A-CCS52-Z-SM PLCC 52-Position Socket Equivalent & Substitute Parts

Part Overview

The A-CCS52-Z-SM is a 52-position PLCC socket manufactured by Assmann WSW Components, designed for surface mount applications with tin-plated phosphor bronze contacts. This component is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing production support and design continuity. Substitute parts must maintain electrical and mechanical compatibility across critical parameters including pin count, pitch, contact finish, and operating temperature range.

Key Parameters

Parameter	Value
Type	PLCC Socket
Number of Positions	52 (4 x 13)
Pitch - Mating	0.050" (1.27mm)
Pitch - Post	0.050" (1.27mm)
Contact Finish - Mating	Tin
Contact Finish - Post	Tin
Mounting Type	Surface Mount
Housing Material	Polybutylene Terephthalate (PBT), Glass Filled
Operating Temperature	-55°C ~ 105°C
Current Rating	1 A
Termination	Solder
Features	Closed Frame

Substitute Part Grouping Explanation

Substitution eligibility for the A-CCS52-Z-SM is determined by strict equivalence across the following critical parameters:

Pin Configuration: 52 positions in 4 x 13 grid arrangement
Pitch Specification: 0.050" (1.27mm) mating and post pitch
Contact Finish: Tin plating on both mating and post surfaces
Mounting Technology: Surface mount configuration
Housing Material: PBT with glass filler
Termination Method: Solder termination
Frame Design: Closed frame construction
Electrical Rating: 1 A current capacity
Temperature Range: Operating capability within -55°C to 105°C minimum

The substitute parts 8452-21A1-RK-TP and 8452-21B1-RK-TP from 3M meet all critical electrical and mechanical parameters required for direct substitution. Both parts are manufactured in the 8400 series and maintain functional equivalence with the original component.

Parameter Comparison

Parameter	A-CCS52-Z-SM (Assmann)	8452-21A1-RK-TP (3M)	8452-21B1-RK-TP (3M)
Manufacturer	Assmann WSW Components	3M	3M
Type	PLCC Socket	PLCC Socket	PLCC Socket
Number of Positions	52 (4 x 13)	52 (4 x 13)	52 (4 x 13)
Pitch - Mating	0.050" (1.27mm)	0.050" (1.27mm)	0.050" (1.27mm)
Pitch - Post	0.050" (1.27mm)	0.050" (1.27mm)	0.050" (1.27mm)
Contact Finish - Mating	Tin	Tin	Tin
Contact Finish - Post	Tin	Tin	Tin
Contact Material - Mating	Phosphor Bronze	Copper Alloy	Copper Alloy
Contact Material - Post	Phosphor Bronze	Copper Alloy	Copper Alloy
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Features	Closed Frame	Closed Frame	Closed Frame
Termination	Solder	Solder	Solder
Termination Post Length	0.130" (3.30mm)	0.132" (3.35mm)	0.132" (3.35mm)
Housing Material	PBT, Glass Filled	PBT, Glass Filled	PBT, Glass Filled
Operating Temperature	-55°C ~ 105°C	-40°C ~ 105°C	-40°C ~ 105°C
Current Rating	1 A	1 A	1 A
Material Flammability Rating	UL94 V-0	UL94 V-0	UL94 V-0
Product Status	Obsolete	Active	Active
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Both 3M substitute parts 8452-21A1-RK-TP and 8452-21B1-RK-TP provide active product status with ROHS3 compliance, addressing the obsolescence and regulatory limitations of the original A-CCS52-Z-SM component. The 3M alternatives maintain all critical electrical and mechanical specifications required for functional equivalence.

The operating temperature range of the 3M substitutes (-40°C to 105°C) is narrower than the original part (-55°C to 105°C) by 15°C at the lower limit. Applications requiring operation below -40°C must account for this specification difference.

Contact material differs between the original phosphor bronze specification and the copper alloy used in 3M substitutes. Both materials provide equivalent electrical performance and contact resistance characteristics within the specified current rating of 1 A.

Termination post length shows a minor dimensional variance of 0.002" (0.05mm) between the original and substitute parts. PCB pad design and solder reflow profiles must accommodate this tolerance.

Frequently Asked Questions (FAQ)

Q: Can 8452-21A1-RK-TP and 8452-21B1-RK-TP be used interchangeably with A-CCS52-Z-SM?

A: Both 3M parts meet the critical substitution parameters: 52-position PLCC configuration, 0.050" pitch, tin contact finish, surface mount termination, and 1 A current rating. Functional equivalence is established across electrical and mechanical specifications.

Q: What is the difference between 8452-21A1-RK-TP and 8452-21B1-RK-TP?

A: Both parts are functionally equivalent 52-position PLCC sockets from the 3M 8400 series with identical electrical and mechanical specifications. Selection between the two may be based on inventory availability or packaging preferences (both supplied in tube packaging).

Q: Does the operating temperature difference affect substitution suitability?

A: The 3M substitutes operate from -40°C to 105°C, compared to the original -55°C to 105°C range. Applications requiring operation below -40°C must evaluate alternative solutions. Standard commercial and industrial applications within the -40°C to 105°C window are unaffected.

Q: Are there compliance differences between the original and substitute parts?

A: The original A-CCS52-Z-SM is RoHS non-compliant. Both 3M substitutes (8452-21A1-RK-TP and 8452-21B1-RK-TP) are ROHS3 compliant, providing regulatory advantage for new designs and updated production runs.

Q: How do contact material differences impact performance?

A: The original uses phosphor bronze contacts while 3M substitutes use copper alloy. Both materials provide equivalent electrical conductivity and contact resistance performance within the 1 A current specification. No functional performance degradation results from this material substitution.

Q: What packaging formats are available for the substitute parts?

A: Both 3M substitute parts are supplied in tube packaging, suitable for automated assembly processes and manual component handling.

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