ICO-318-LGT Equivalent & Substitute Parts

Part Overview

The ICO-318-LGT is an 18-position DIP socket manufactured by Samtec Inc., designed for through-hole mounting applications requiring gold-plated mating contacts and tin-plated solder posts. This socket accommodates dual-in-line integrated circuits with 0.3" (7.62mm) row spacing and 0.100" (2.54mm) pitch. The product maintains Active status with 727 units in current inventory. Substitute parts are identified when equivalent electrical and mechanical parameters align with the original specification, enabling component procurement flexibility while maintaining circuit performance and reliability requirements.

Substiute Parts

ICO-318-LGT

Samtec Inc.In Stock: 807ICO-318-LGT Datasheet

Current PartRFQ

115-93-318-41-001000

Mill-Max Manufacturing Corp.In Stock: 1248115-93-318-41-001000 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ICO-318-LGT is determined by strict alignment of the following critical parameters:

Mandatory Matching Parameters:

• Number of Positions: 18 (2 x 9)
• Type: DIP with 0.3" (7.62mm) Row Spacing
• 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
• Features: Open Frame

The substitute part 115-93-318-41-001000 (Mill-Max Manufacturing Corp.) satisfies all mandatory matching parameters, establishing functional and mechanical equivalence for direct substitution in circuit applications.

Parameter Comparison

Engineering Selection Recommendations

ICO-318-LGT Selection Criteria:

• Applications requiring ROHS3 compliance
• Designs with strict RoHS regulatory requirements
• Specifications calling for 1 A current rating
• Polyester glass-filled housing material preference

115-93-318-41-001000 Selection Criteria:

• Applications where RoHS compliance is not mandated
• Designs requiring higher current capacity (3 A rating)
• Tin-lead post finish acceptable for legacy or non-restricted applications
• PCT polyester housing material compatibility
• Higher post contact finish thickness (200.0µin) for enhanced durability in high-cycle insertion applications

Both parts maintain identical mating contact specifications (gold-plated beryllium copper) and identical operating temperature ranges (-55°C ~ 125°C), ensuring functional equivalence in socket-to-IC interface performance. Selection between these parts depends on regulatory compliance requirements and current rating specifications for the target application.

Frequently Asked Questions (FAQ)

Q: Can 115-93-318-41-001000 directly replace ICO-318-LGT in existing designs?

A: Direct mechanical and electrical substitution is supported for applications where RoHS compliance is not required. The mating contact specifications (gold-plated beryllium copper, 0.100" pitch, 18-position DIP configuration) are identical. However, the substitute part carries RoHS non-compliant status, which may restrict use in regulated markets or applications with RoHS mandates.

Q: What is the significance of the post contact finish difference (Tin vs. Tin-Lead)?

A: The ICO-318-LGT uses pure tin post finish (10.0µin thickness), while the 115-93-318-41-001000 uses tin-lead finish (200.0µin thickness). Tin-lead finishes provide enhanced durability and corrosion resistance in high-cycle insertion environments. Pure tin finishes are preferred in RoHS-compliant applications. Both finishes support solder termination and through-hole mounting.

Q: Does the current rating difference (1 A vs. 3 A) affect substitution?

A: The 115-93-318-41-001000 provides higher current capacity (3 A) compared to the ICO-318-LGT (1 A). This represents a performance advantage for applications requiring higher current handling. Substitution is valid when circuit current requirements do not exceed the original 1 A specification. Applications designed for the 1 A rating will operate within safe margins using the 3 A-rated substitute.

Q: Are the housing materials functionally equivalent?

A: Both housing materials (polyester glass-filled for ICO-318-LGT and PCT polyester for 115-93-318-41-001000) provide equivalent mechanical support and thermal stability across the -55°C ~ 125°C operating range. Material selection does not affect socket functionality or IC compatibility. PCT polyester offers slightly enhanced chemical resistance in certain industrial environments.

Q: What inventory considerations apply to these parts?

A: ICO-318-LGT maintains 727 units in current stock. The substitute part 115-93-318-41-001000 has higher availability with 1159 units in inventory. Procurement decisions may consider lead time and stock availability alongside compliance and performance requirements.

Q: Are both parts suitable for automated assembly processes?

A: Both parts feature identical through-hole mounting specifications (0.100" pitch, open frame design) and solder termination, supporting standard automated PCB assembly equipment and wave soldering processes. No process modifications are required when substituting between these parts.