ICA-640-SST DIP Socket Equivalent & Substitute Parts

Part Overview

The ICA-640-SST is a 40-position DIP socket manufactured by Samtec Inc., designed for through-hole mounting applications requiring gold-plated mating contacts. This socket accommodates 40-pin DIP integrated circuits with 0.6" (15.24mm) row spacing and 0.100" (2.54mm) pitch. The part is currently in active production status with 741 pieces available in new original inventory. Equivalent and substitute parts are identified when manufacturers discontinue production, inventory becomes depleted, or alternative sourcing is required for cost optimization or supply chain diversification.

Key Parameters

Parameter	Value
Number of Positions	40 (2 x 20)
Row Spacing	0.6" (15.24mm)
Pitch - Mating	0.100" (2.54mm)
Pitch - Post	0.100" (2.54mm)
Contact Finish - Mating	Gold
Contact Material - Mating	Beryllium Copper
Mounting Type	Through Hole
Termination	Solder
Operating Temperature Range	-55°C ~ 125°C
Material Flammability Rating	UL94 V-0
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the ICA-640-SST are qualified based on the following critical parameters that determine functional and mechanical compatibility:

Primary Compatibility Criteria:

Number of Positions: 40 (2 x 20)
Row Spacing: 0.6" (15.24mm)
Pitch - Mating: 0.100" (2.54mm)
Pitch - Post: 0.100" (2.54mm)
Mounting Type: Through Hole
Termination: Solder

Secondary Compatibility Criteria:

Contact Material - Mating: Beryllium Copper
Contact Finish - Post: Tin
Contact Material - Post: Brass or Brass Alloy
RoHS Status: ROHS3 Compliant

All four substitute parts meet the primary compatibility criteria. Variations in contact finish thickness, current rating, and housing material do not affect mechanical or electrical interchangeability for standard DIP socket applications.

Parameter Comparison

Parameter	ICA-640-SST (Samtec)	110-41-640-41-001000 (Mill-Max)	110-87-640-41-001101 (Preci-Dip)	40-6518-10 (Aries)	AR 40-HZL-TT (Assmann)
Manufacturer	Samtec Inc.	Mill-Max Manufacturing Corp.	Preci-Dip	Aries Electronics	Assmann WSW Components
Number of Positions	40 (2 x 20)	40 (2 x 20)	40 (2 x 20)	40 (2 x 20)	40 (2 x 20)
Row Spacing	0.6" (15.24mm)	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)	0.100" (2.54mm)
Pitch - Post	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)
Contact Finish - Mating	Gold	Gold	Gold	Gold	Tin
Contact Finish Thickness - Mating	10.0µin (0.25µm)	10.0µin (0.25µm)	Flash	10.0µin (0.25µm)	Not specified
Contact Material - Mating	Beryllium Copper	Beryllium Copper	Beryllium Copper	Beryllium Copper	Beryllium Copper
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Termination	Solder	Solder	Solder	Solder	Solder
Contact Finish - Post	Tin	Tin	Tin	Tin	Tin
Contact Material - Post	Brass	Brass Alloy	Brass	Brass	Beryllium Copper
Operating Temperature Range	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	Not specified	-40°C ~ 105°C
Material Flammability Rating	UL94 V-0	Not specified	UL94 V-0	UL94 V-0	UL94 V-0
Current Rating (Amps)	1 A	3 A	1 A	3 A	3 A
Contact Resistance	10mOhm	Not specified	10mOhm	Not specified	4mOhm
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Packaging	Tube	Tube	Tube	Bulk	Tube
Inventory Status	741 Pcs	1249 Pcs	1330 Pcs	2229 Pcs	7434 Pcs

Engineering Selection Recommendations

110-87-640-41-001101 (Preci-Dip): This substitute provides the closest electrical and mechanical match to the ICA-640-SST. Both parts share identical pin count, row spacing, pitch specifications, operating temperature range (-55°C ~ 125°C), UL94 V-0 flammability rating, and contact resistance (10mOhm). The primary difference is mating contact finish thickness (Flash vs. 10.0µin), which does not affect functional compatibility. This part is ROHS3 compliant with MSL 1 rating and is recommended as the primary substitute.

40-6518-10 (Aries Electronics): This substitute meets all primary compatibility criteria with identical pin configuration, spacing, and pitch. The part features higher current rating (3 A vs. 1 A) and improved contact resistance (4mOhm vs. 10mOhm). Operating temperature range is not specified. UL94 V-0 flammability rating and ROHS3 compliance are confirmed. Packaging is bulk rather than tube. This part is suitable for applications requiring higher current capacity.

110-41-640-41-001000 (Mill-Max Manufacturing): This substitute meets all primary compatibility criteria with identical pin configuration and pitch specifications. Operating temperature range matches the ICA-640-SST (-55°C ~ 125°C). Current rating is higher at 3 A. Material flammability rating is not specified. ROHS3 compliance and MSL 1 rating are confirmed. This part is available in tube packaging.

AR 40-HZL-TT (Assmann WSW Components): This substitute differs in mating contact finish (Tin vs. Gold) and operates within a narrower temperature range (-40°C ~ 105°C). The part meets all primary mechanical compatibility criteria and features superior contact resistance (4mOhm). UL94 V-0 flammability rating and ROHS3 compliance are confirmed. This part is suitable for applications where tin-plated contacts are acceptable and operating temperatures remain within the specified range.

Frequently Asked Questions (FAQ)

Q: Can I substitute the ICA-640-SST with any of these four parts without PCB redesign?

A: Yes. All four substitute parts share identical pin count (40), row spacing (0.6"), and pitch specifications (0.100"). They are mechanically and electrically interchangeable for standard DIP socket applications without PCB modification.

Q: What is the difference between gold-plated and tin-plated mating contacts?

A: Gold-plated contacts (ICA-640-SST, 110-41-640-41-001000, 110-87-640-41-001101, 40-6518-10) provide superior corrosion resistance and lower contact resistance over extended storage periods. Tin-plated contacts (AR 40-HZL-TT) are suitable for applications with shorter shelf life and immediate use. Both finishes are acceptable for standard DIP socket applications.

Q: Why does the AR 40-HZL-TT have a narrower operating temperature range?

A: The AR 40-HZL-TT operates from -40°C to 105°C, compared to -55°C to 125°C for the ICA-640-SST. This difference reflects the design specifications of the Assmann part. Applications requiring operation below -40°C or above 105°C must use alternative substitutes.

Q: What is the significance of the current rating difference (1 A vs. 3 A)?

A: The ICA-640-SST is rated for 1 A per contact, while 110-41-640-41-001000, 40-6518-10, and AR 40-HZL-TT are rated for 3 A per contact. For standard DIP socket applications, current rating is typically not a limiting factor. Higher current ratings provide additional design margin for applications with elevated current requirements.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All four substitute parts are ROHS3 compliant. The ICA-640-SST is also ROHS3 compliant. This ensures compatibility with environmental regulations and procurement requirements.

Q: What is the difference between tube and bulk packaging?

A: Tube packaging (ICA-640-SST, 110-41-640-41-001000, 110-87-640-41-001101, AR 40-HZL-TT) provides individual part protection and is suitable for manual assembly and small-quantity orders. Bulk packaging (40-6518-10) is used for high-volume manufacturing and automated assembly processes. Packaging selection depends on production volume and assembly methodology.

Q: Can I use the 40-6518-10 if operating temperature is not specified?

A: The 40-6518-10 datasheet does not specify an operating temperature range. For applications requiring confirmed temperature specifications, use the ICA-640-SST, 110-41-640-41-001000, 110-87-640-41-001101, or AR 40-HZL-TT. Contact the manufacturer for detailed thermal specifications if the 40-6518-10 is required.

Q: Which substitute offers the best contact resistance?

A: The AR 40-HZL-TT provides the lowest contact resistance at 4mOhm, compared to 10mOhm for the ICA-640-SST and 110-87-640-41-001101. The 110-41-640-41-001000 and 40-6518-10 do not specify contact resistance values. Lower contact resistance reduces voltage drop and heat generation in high-current applications.

Q: Are moisture sensitivity levels specified for all parts?

A: The ICA-640-SST does not specify MSL. The 110-41-640-41-001000, 110-87-640-41-001101, 40-6518-10, and AR 40-HZL-TT all specify MSL 1 (Unlimited), indicating no moisture sensitivity restrictions for storage and handling.

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