ICO-318-NGT Equivalent & Substitute Parts

Part Overview

The ICO-318-NGT is an 18-position DIP socket manufactured by Samtec Inc., designed for through-hole mounting applications requiring low-profile screw machine construction. This socket accommodates 18-pin DIP packages with 0.3" (7.62mm) row spacing and 0.100" (2.54mm) pitch. The part is currently in active production status with 832 pieces available in inventory. Substitute parts are identified when equivalent electrical and mechanical parameters are required due to inventory constraints, supply chain considerations, or specific application requirements.

Key Parameters

Parameter	Value
Number of Positions	18 (2 x 9)
Row Spacing	0.3" (7.62mm)
Pitch - Mating	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
Current Rating	1 A
Contact Resistance	10mOhm

Substitute Part Grouping Explanation

Substitution eligibility for the ICO-318-NGT is determined by strict equivalence in the following critical parameters:

Mandatory Matching Parameters:

Number of Positions: 18 (2 x 9)
Row Spacing: 0.3" (7.62mm)
Pitch - Mating: 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

The substitute part 115-93-318-41-003000 (Mill-Max Manufacturing Corp.) meets all mandatory matching parameters and is therefore classified as an equivalent substitute. Both parts are DIP sockets with identical mechanical interfaces and electrical contact specifications for the mating side.

Parameter Comparison

Parameter	ICO-318-NGT (Samtec)	115-93-318-41-003000 (Mill-Max)	Compatibility
Number of Positions	18 (2 x 9)	18 (2 x 9)	Equivalent
Row Spacing	0.3" (7.62mm)	0.3" (7.62mm)	Equivalent
Pitch - Mating	0.100" (2.54mm)	0.100" (2.54mm)	Equivalent
Contact Finish - Mating	Gold	Gold	Equivalent
Contact Finish Thickness - Mating	30.0µin (0.76µm)	30.0µin (0.76µm)	Equivalent
Contact Material - Mating	Beryllium Copper	Beryllium Copper	Equivalent
Mounting Type	Through Hole	Through Hole	Equivalent
Features	Open Frame	Open Frame	Equivalent
Termination	Solder	Solder	Equivalent
Pitch - Post	0.100" (2.54mm)	0.100" (2.54mm)	Equivalent
Contact Finish - Post	Tin	Tin-Lead	Functionally Compatible
Contact Material - Post	Brass	Brass Alloy	Functionally Compatible
Housing Material	Polyester, Glass Filled	Polycyclohexylenedimethylene Terephthalate (PCT), Polyester	Functionally Compatible
Operating Temperature	-55°C ~ 125°C	-55°C ~ 125°C	Equivalent
Current Rating (Amps)	1 A	3 A	Mill-Max Exceeds Requirement
Contact Resistance	10mOhm	Not Specified	Data Not Available
RoHS Status	ROHS3 Compliant	RoHS non-compliant	Compliance Difference
Product Status	Active	Active	Both Active
Inventory Available	832 Pcs	3455 Pcs	Mill-Max Higher Stock

Engineering Selection Recommendations

Primary Selection - ICO-318-NGT (Samtec Inc.): The ICO-318-NGT is the specified part and maintains active production status with ROHS3 compliance certification. This part is suitable for applications requiring RoHS3 compliance and is recommended as the first choice when availability permits.

Substitute Selection - 115-93-318-41-003000 (Mill-Max Manufacturing Corp.): The 115-93-318-41-003000 provides functional equivalence for all critical mating-side electrical and mechanical parameters. This substitute is suitable for applications where RoHS3 compliance is not a requirement. The higher current rating (3 A versus 1 A) provides additional margin for applications within the specified 1 A operating range. Higher inventory availability (3455 pieces) supports supply chain continuity.

Compliance Consideration: Applications requiring RoHS3 compliance must use ICO-318-NGT. Applications where RoHS compliance is not mandated may use 115-93-318-41-003000 as an equivalent substitute.

Frequently Asked Questions (FAQ)

Q: Can 115-93-318-41-003000 be used as a direct replacement for ICO-318-NGT in all applications?

A: The 115-93-318-41-003000 is mechanically and electrically equivalent for all mating-side parameters. However, it is RoHS non-compliant, whereas ICO-318-NGT is ROHS3 compliant. Use 115-93-318-41-003000 only in applications where RoHS3 compliance is not required.

Q: What are the critical parameters that determine socket substitutability?

A: Socket substitutability is determined by: number of positions (18), row spacing (0.3"), mating pitch (0.100"), mating contact finish (gold), mating contact material (beryllium copper), mounting type (through hole), termination method (solder), and operating temperature range (-55°C to 125°C). Both parts match these parameters.

Q: Does the higher current rating of the Mill-Max part affect compatibility?

A: No. The 115-93-318-41-003000 current rating of 3 A exceeds the ICO-318-NGT specification of 1 A. This provides additional design margin and does not create compatibility issues for applications operating within the 1 A specification.

Q: Are the post-side differences between tin and tin-lead finishes significant?

A: Both finishes are solder-compatible termination methods. The tin-lead finish on the Mill-Max part (200.0µin thickness) provides thicker plating than the tin finish on the Samtec part (10.0µin thickness), which may offer enhanced solderability and durability in high-cycle applications.

Q: What is the impact of different housing materials?

A: Both housing materials (polyester glass-filled versus PCT polyester) are suitable for the specified operating temperature range (-55°C to 125°C) and provide equivalent mechanical support. Material selection does not affect electrical performance or mechanical fit.

Q: How should I select between these parts for new designs?

A: For new designs requiring RoHS3 compliance, specify ICO-318-NGT. For applications without RoHS compliance requirements, either part is acceptable. Consider inventory availability and lead times as secondary factors.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message