A18-LCG-T-R Equivalent & Substitute Parts

Part Overview

The A18-LCG-T-R is an 18-position DIP socket manufactured by Assmann WSW Components, designed for through-hole mounting of dual inline package integrated circuits. This connector 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 substitutes necessary for ongoing production and maintenance applications requiring 18-position DIP socket functionality with 0.3" row spacing and 0.100" pitch.

Substiute Parts

A18-LCG-T-R

Assmann WSW ComponentsIn Stock: 907A18-LCG-T-R Datasheet

Current PartRFQ

A 18-LC-TT

Assmann WSW ComponentsIn Stock: 2122A 18-LC-TT Datasheet

MFR RecommendedRFQ

818-AG11D-ESL-LF

TE Connectivity AMP ConnectorsIn Stock: 1066818-AG11D-ESL-LF Datasheet

DirectRFQ

110-13-318-41-001000

Mill-Max Manufacturing Corp.In Stock: 1283110-13-318-41-001000 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the A18-LCG-T-R is determined by the following critical parameters:

• Position Count & Pitch: All substitutes must maintain 18 positions in 2 x 9 configuration with 0.100" (2.54mm) mating pitch and 0.3" (7.62mm) row spacing to ensure mechanical and electrical compatibility with existing PCB layouts.
• Mounting Type: Through-hole mounting is required for direct replacement in existing designs.
• Contact Finish - Mating: Gold plating on mating contacts is specified for the primary part and determines the primary substitute category.
• Operating Temperature: The -55°C ~ 105°C range establishes the minimum thermal performance requirement.
• Current Rating & Contact Resistance: 1 A current rating and 30 mOhm contact resistance define electrical performance boundaries.
• Flammability & Compliance: UL94 V-0 rating and REACH compliance are mandatory for equivalent substitution.

Substitutes are grouped into two categories: direct equivalents with gold-plated mating contacts (matching the original specification) and alternative options with different contact finishes that maintain core mechanical and electrical parameters.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: 110-13-318-41-001000 (Mill-Max Manufacturing)

The 110-13-318-41-001000 is the recommended direct equivalent for A18-LCG-T-R replacement. This part maintains identical mechanical configuration (18 positions, 0.100" pitch, 0.3" row spacing, through-hole mounting) and contact finish specification (gold-plated mating contacts). The part is currently active in production with ROHS3 compliance and extended operating temperature range (-55°C ~ 125°C), providing superior thermal performance compared to the obsolete original. Current rating of 3 A exceeds the original 1 A specification, offering additional design margin.

Secondary Substitute: 818-AG11D-ESL-LF (TE Connectivity)

The 818-AG11D-ESL-LF provides mechanical and electrical compatibility with gold flash-plated mating contacts and matching operating temperature range (-55°C ~ 105°C). Contact resistance of 10 mOhm is superior to the original 30 mOhm specification. However, this part is obsolete, limiting long-term availability for production applications.

Alternative Substitute: A 18-LC-TT (Assmann WSW Components)

The A 18-LC-TT maintains the same manufacturer and mechanical configuration with tin-plated mating contacts instead of gold. This part is active in production with ROHS3 compliance. Operating temperature range is reduced to -55°C ~ 85°C, which may not satisfy applications requiring the full -55°C ~ 105°C thermal envelope of the original part. Contact finish difference (tin versus gold) may affect long-term reliability in corrosive environments.

Frequently Asked Questions (FAQ)

Q: Can A 18-LC-TT be used as a direct replacement for A18-LCG-T-R?

A: A 18-LC-TT maintains identical mechanical configuration and current rating but differs in contact finish (tin versus gold) and maximum operating temperature (85°C versus 105°C). Substitution is valid only for applications operating within -55°C ~ 85°C range where tin-plated contacts are acceptable.

Q: What is the primary difference between 110-13-318-41-001000 and 818-AG11D-ESL-LF?

A: Both parts feature gold-plated mating contacts and identical mechanical specifications. The 110-13-318-41-001000 is currently active in production with ROHS3 compliance and 3 A current rating, while 818-AG11D-ESL-LF is obsolete with 1 A current rating and 10 mOhm contact resistance.

Q: Are all substitute parts compatible with existing PCB layouts designed for A18-LCG-T-R?

A: Yes. All listed substitutes maintain 18-position configuration, 0.100" mating pitch, 0.3" row spacing, and through-hole mounting, ensuring mechanical compatibility with existing PCB designs without layout modification.

Q: Which substitute offers the best long-term availability?

A: 110-13-318-41-001000 and A 18-LC-TT are both active products. 110-13-318-41-001000 is the preferred choice due to active production status, ROHS3 compliance, extended temperature range, and higher current rating.

Q: Does contact finish affect electrical performance?

A: Contact finish affects long-term reliability and corrosion resistance. Gold-plated contacts (A18-LCG-T-R, 818-AG11D-ESL-LF, 110-13-318-41-001000) provide superior corrosion resistance compared to tin-plated contacts (A 18-LC-TT), particularly in harsh or humid environments.

Q: What is the significance of the 3 A current rating in 110-13-318-41-001000?

A: The 3 A rating in 110-13-318-41-001000 exceeds the original 1 A specification, providing additional design margin and thermal headroom for applications with variable current demands or future design iterations.