A28-LCG-T-R DIP Socket 28-Position Equivalent & Substitute Parts

Part Overview

The A28-LCG-T-R is a 28-position DIP socket manufactured by Assmann WSW Components, designed for through-hole mounting of dual inline package integrated circuits. This component features gold-plated mating contacts and is rated for 1 A current with a contact resistance of 30 mOhm. The part is currently obsolete, making equivalent and substitute parts necessary for ongoing system support and new designs requiring compatible socket solutions.

Key Parameters

Parameter	Value
Number of Positions	28 (2 x 14)
Row Spacing	0.6" (15.24mm)
Pitch - Mating	0.100" (2.54mm)
Pitch - Post	0.100" (2.54mm)
Contact Finish - Mating	Gold
Mounting Type	Through Hole
Termination	Solder
Operating Temperature Range	-55°C ~ 105°C
Current Rating	1 A
Contact Resistance	30 mOhm
Housing Material	Polybutylene Terephthalate (PBT), Glass Filled
Flammability Rating	UL94 V-0

Substitute Part Grouping Explanation

Substitution eligibility for the A28-LCG-T-R is determined by the following critical parameters:

Number of positions and row spacing (28 positions, 0.6" spacing)
Mating and post pitch (0.100" / 2.54mm)
Mounting type (through-hole solder termination)
Contact finish on mating surface (gold plating)
Operating temperature range compatibility
Current rating and contact resistance specifications

Three substitute parts meet these core mechanical and electrical requirements. The A 28-LC-TT differs in contact finish material (tin vs. gold) and operating temperature range. The 110-13-628-41-001000 and SA286040 maintain gold contact finish and provide enhanced current ratings and lower contact resistance, making them direct functional equivalents with improved electrical performance characteristics.

Parameter Comparison

Parameter	A28-LCG-T-R	A 28-LC-TT	110-13-628-41-001000	SA286040
Manufacturer	Assmann WSW Components	Assmann WSW Components	Mill-Max Manufacturing Corp.	On Shore Technology Inc.
Number of Positions	28 (2 x 14)	28 (2 x 14)	28 (2 x 14)	28 (2 x 14)
Row Spacing	0.6" (15.24mm)	0.6" (15.24mm)	0.6" (15.24mm)	0.6" (15.24mm)
Pitch - Mating	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)
Pitch - Post	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)
Contact Finish - Mating	Gold	Tin	Gold	Gold
Contact Material - Mating	-	Phosphor Bronze	Beryllium Copper	Beryllium Copper
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole
Termination	Solder	Solder	Solder	Solder
Operating Temperature Range	-55°C ~ 105°C	-55°C ~ 85°C	-55°C ~ 125°C	-40°C ~ 105°C
Current Rating	1 A	1 A	3 A	3 A
Contact Resistance	30 mOhm	30 mOhm	-	4 mOhm
Flammability Rating	UL94 V-0	UL94 V-0	-	UL94 V-0
Product Status	Obsolete	Active	Active	Active
RoHS Status	-	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

All three substitute parts are currently active products with ROHS3 compliance, addressing the obsolescence of the A28-LCG-T-R.

For applications requiring gold contact finish with the original operating temperature range (-55°C ~ 105°C), the 110-13-628-41-001000 and SA286040 are direct mechanical and electrical equivalents. Both provide enhanced current ratings (3 A vs. 1 A) and improved contact resistance characteristics. The 110-13-628-41-001000 extends the upper operating temperature to 125°C, while SA286040 maintains the lower temperature limit at -40°C.

The A 28-LC-TT provides an alternative with tin contact finish and phosphor bronze mating material. This part operates within a reduced temperature range (-55°C ~ 85°C) and maintains the original 1 A current rating. Selection of this part is appropriate when tin plating is acceptable and operating temperatures remain below 85°C.

Frequently Asked Questions (FAQ)

Q: Can the A 28-LC-TT substitute for the A28-LCG-T-R in all applications?

A: The A 28-LC-TT is mechanically compatible but differs in contact finish (tin vs. gold) and maximum operating temperature (85°C vs. 105°C). Substitution is valid only when the application operates below 85°C and tin contact finish is acceptable for the intended circuit.

Q: What are the advantages of the 110-13-628-41-001000 over the original A28-LCG-T-R?

A: The 110-13-628-41-001000 provides a higher current rating (3 A vs. 1 A), extended upper operating temperature (125°C vs. 105°C), and active product status with ROHS3 compliance. Contact resistance data is not provided for direct comparison.

Q: Is the SA286040 suitable for high-reliability applications?

A: The SA286040 meets UL94 V-0 flammability requirements and provides superior contact resistance (4 mOhm vs. 30 mOhm). It is rated for 3 A current and operates from -40°C to 105°C. Suitability depends on specific application requirements and the -40°C lower temperature limit.

Q: Are all substitute parts available in the same packaging?

A: All substitute parts are supplied in tube packaging. The original A28-LCG-T-R packaging specification was not provided in the technical data.

Q: What is the impact of different contact materials on socket performance?

A: Contact material differences (phosphor bronze in A 28-LC-TT vs. beryllium copper in 110-13-628-41-001000 and SA286040) affect electrical and mechanical properties. Beryllium copper provides superior spring characteristics and contact reliability. Material selection should align with application requirements for insertion cycles and contact force retention.

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