A-CCS-044-Z-SM-R PLCC 44-Position Socket Equivalent & Substitute Parts

Part Overview

The A-CCS-044-Z-SM-R is a 44-position PLCC socket manufactured by Assmann WSW Components, designed for surface mount applications. This component features tin-plated phosphor bronze contacts with a 0.050" (1.27mm) pitch and closed frame construction. The part is classified as obsolete, making equivalent and substitute parts necessary for ongoing production and maintenance applications requiring 44-position PLCC socket functionality.

Key Parameters

Parameter	Value
Type	PLCC
Number of Positions	44 (4 x 11)
Pitch - Mating	0.050" (1.27mm)
Mounting Type	Surface Mount
Contact Finish - Mating	Tin
Contact Material - Mating	Phosphor Bronze
Features	Closed Frame
Termination	Solder
Operating Temperature Range	-55°C ~ 105°C
Current Rating	1 A
Material Flammability Rating	UL94 V-0
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution for the A-CCS-044-Z-SM-R is determined by strict adherence to the following critical parameters:

Type: PLCC socket configuration
Position count: 44 (4 x 11) grid
Pitch - Mating: 0.050" (1.27mm)
Mounting type: Surface Mount
Contact finish: Tin plating
Features: Closed frame construction
Termination: Solder
Flammability rating: UL94 V-0
Moisture sensitivity: MSL 1

All substitute parts listed maintain these core electrical and mechanical specifications. Variations in housing material, contact material composition, operating temperature range, and contact resistance do not preclude substitution when the above parameters are identical.

Parameter Comparison

Parameter	A-CCS-044-Z-SM-R (Main)	A-CCS 044-Z-SM	540-44-044-17-400000	8444-21A1-RK-TP	8444-21B1-RK-TP	8444-21B1-RK-TR	940-44-044-17-400000	PLCC-44-AT-SMT
Manufacturer	Assmann WSW	Assmann WSW	Mill-Max	3M	3M	3M	Mill-Max	Adam Tech
Type	PLCC	PLCC	PLCC	PLCC	PLCC	PLCC	PLCC	PLCC
Positions	44 (4 x 11)	44 (4 x 11)	44 (4 x 11)	44 (4 x 11)	44 (4 x 11)	44 (4 x 11)	44 (4 x 11)	44 (4 x 11)
Pitch - Mating	0.050" (1.27mm)	0.050" (1.27mm)	0.050" (1.27mm)	0.050" (1.27mm)	0.050" (1.27mm)	0.050" (1.27mm)	0.050" (1.27mm)	0.050" (1.27mm)
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Contact Finish - Mating	Tin	Tin	Tin	Tin	Tin	Tin	Tin	Tin
Features	Closed Frame	Closed Frame	Closed Frame	Closed Frame	Closed Frame	Closed Frame	Closed Frame	Closed Frame
Termination	Solder	Solder	Solder	Solder	Solder	Solder	Solder	Solder
Operating Temperature	-55°C ~ 105°C	-40°C ~ 105°C	-55°C ~ 125°C	-40°C ~ 105°C	-40°C ~ 105°C	-40°C ~ 105°C	-55°C ~ 125°C	-55°C ~ 105°C
Current Rating	1 A	1 A	1 A	1 A	1 A	1 A	1 A	1 A
Contact Resistance	30mOhm	15mOhm	20mOhm	—	—	15mOhm	30mOhm	30mOhm
Flammability Rating	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0
Moisture Sensitivity	MSL 1	MSL 1	MSL 1	MSL 1	MSL 1	MSL 1	MSL 1	MSL 1
Product Status	Obsolete	Active	Active	Active	Active	Active	Active	Active
RoHS Status	—	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

All listed substitute parts maintain functional equivalence to the A-CCS-044-Z-SM-R based on identical core specifications: 44-position PLCC configuration, 0.050" pitch, surface mount termination, tin contact finish, and closed frame design.

The primary distinction among substitutes is product status. The A-CCS-044-Z-SM-R is obsolete; all substitute parts are active products with current manufacturing support and availability.

For applications requiring the original operating temperature range of -55°C to 105°C, the following parts maintain this specification: A-CCS 044-Z-SM, PLCC-44-AT-SMT. The 540-44-044-17-400000 and 940-44-044-17-400000 extend the upper temperature limit to 125°C, providing additional thermal margin.

All substitute parts carry ROHS3 compliance and UL94 V-0 flammability certification. Contact resistance values vary among substitutes (15mOhm to 30mOhm) but remain within acceptable ranges for 1 A rated applications.

Packaging options include Tube and Tape & Reel (TR) configurations. The 8444-21B1-RK-TR is supplied in Tape & Reel format; all other substitutes are available in Tube packaging.

Frequently Asked Questions (FAQ)

Q: Can the A-CCS 044-Z-SM directly replace the A-CCS-044-Z-SM-R?

A: Yes. Both parts share identical PLCC 44-position configuration, 0.050" pitch, tin contact finish, and closed frame construction. The A-CCS 044-Z-SM is the active product variant with current manufacturing support.

Q: What is the difference between the 3M 8444-21A1-RK-TP and 8444-21B1-RK-TP?

A: Both are 3M 8400 series PLCC 44-position sockets with identical electrical and mechanical specifications. The primary difference is packaging: 8444-21A1-RK-TP is supplied in Tube; 8444-21B1-RK-TP is available in both Tube (TP) and Tape & Reel (TR) formats.

Q: Are there operating temperature differences between substitutes?

A: Yes. The A-CCS-044-Z-SM-R, A-CCS 044-Z-SM, and PLCC-44-AT-SMT operate from -55°C to 105°C. The Mill-Max 540-44-044-17-400000 and 940-44-044-17-400000 extend to -55°C to 125°C, providing wider thermal operating range.

Q: Do all substitutes meet RoHS compliance?

A: All active substitute parts listed are ROHS3 compliant. The original A-CCS-044-Z-SM-R does not specify RoHS status.

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

A: Contact resistance values are: A-CCS 044-Z-SM (15mOhm), 540-44-044-17-400000 (20mOhm), 8444-21B1-RK-TR (15mOhm), 940-44-044-17-400000 (30mOhm), PLCC-44-AT-SMT (30mOhm). The 3M 8444-21A1-RK-TP does not specify contact resistance.

Q: Can substitutes be used interchangeably in existing designs?

A: All listed substitutes maintain the same footprint, pitch, pin count, and electrical ratings. PCB layout and assembly processes require no modification for substitution.

Q: Which substitute offers the best availability?

A: The A-CCS 044-Z-SM (Assmann WSW) has the highest inventory at 13,432 pieces. The 8444-21B1-RK-TR (3M) has 6,287 pieces in stock.

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