A3C-18DA-2DSA Equivalent & Substitute Parts

Part Overview

The A3C-18DA-2DSA is an 18-position rectangular receptacle connector manufactured by Hirose Electric Co Ltd, designed for board-to-board or cable applications with 0.079" (2.00mm) pitch spacing. This connector features gold-plated mating contacts, through-hole solder termination, and push-pull fastening. The part is currently listed as obsolete, making equivalent and substitute parts necessary for ongoing system support and new design implementations.

Substiute Parts

A3C-18DA-2DSA

Hirose Electric Co LtdIn Stock: 789A3C-18DA-2DSA Datasheet

Current PartRFQ

A3C-18DA-2DSA(71)

Hirose Electric Co LtdIn Stock: 874A3C-18DA-2DSA(71) Datasheet

DirectRFQ

SMM-109-01-S-D

Samtec Inc.In Stock: 1069SMM-109-01-S-D Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the A3C-18DA-2DSA is determined by the following critical parameters:

• 18-position configuration with 2-row layout
• 0.079" (2.00mm) mating pitch and row spacing
• Receptacle connector with female socket contacts
• Through-hole solder termination
• Push-pull fastening mechanism
• Gold-plated mating contact finish
• UL94 V-0 flammability rating

Parts meeting these core electrical and mechanical specifications are classified as direct substitutes. Variations in secondary parameters such as insulation material, contact finish thickness, or operating temperature range do not preclude substitution provided the primary functional requirements are satisfied.

Parameter Comparison

Engineering Selection Recommendations

A3C-18DA-2DSA(71) is the direct equivalent from Hirose Electric Co Ltd. This part maintains identical electrical and mechanical specifications to the obsolete A3C-18DA-2DSA while offering active product status and RoHS compliance. Selection of this part eliminates supply chain risk associated with obsolete inventory and ensures compliance with current regulatory requirements.

SMM-109-01-S-D from Samtec Inc. is a qualified substitute meeting all core substitution criteria. This part provides enhanced electrical performance with 3.2A per contact current rating and 350VAC voltage rating, exceeding the original specification. The extended operating temperature range (-55°C ~ 125°C) and ROHS3 compliance support applications requiring higher thermal or regulatory margins. The Liquid Crystal Polymer insulation material and Beryllium Copper contacts represent alternative material selections within the same functional class.

Selection between these substitutes depends on application requirements, supply availability, and compliance mandates. Both parts satisfy the fundamental 18-position, 2.00mm pitch, through-hole solder receptacle connector specification.

Frequently Asked Questions (FAQ)

Q: Can A3C-18DA-2DSA(71) be used as a direct replacement for A3C-18DA-2DSA?

A: Yes. A3C-18DA-2DSA(71) maintains identical electrical and mechanical parameters including connector type, position count, pitch spacing, mounting method, and contact finish. The primary difference is product status (active versus obsolete) and RoHS compliance.

Q: What are the key differences between A3C-18DA-2DSA and SMM-109-01-S-D?

A: Both connectors share identical core specifications: 18-position receptacle, 0.079" (2.00mm) pitch, 2-row configuration, through-hole solder termination, and push-pull fastening. SMM-109-01-S-D provides higher current rating (3.2A per contact versus 1A), higher voltage rating (350VAC versus 200VAC), extended operating temperature range (-55°C ~ 125°C versus -55°C ~ 85°C), and uses Liquid Crystal Polymer insulation with Beryllium Copper contacts instead of PBT with Phosphor Bronze.

Q: Are there mechanical compatibility concerns when substituting these parts?

A: All three parts share identical mating pitch (0.079"), row spacing (0.079"), and push-pull fastening mechanism. Mechanical compatibility is maintained across substitutions. Packaging format differs (tray for A3C-18DA-2DSA(71), tube for SMM-109-01-S-D), affecting handling and storage but not functional compatibility.

Q: Which substitute should be selected for new designs?

A: Selection depends on application electrical requirements and compliance mandates. For applications within the original specification envelope (1A, 200VAC, -55°C ~ 85°C), A3C-18DA-2DSA(71) provides direct equivalence with active status and RoHS compliance. For applications requiring higher current, voltage, or temperature performance, SMM-109-01-S-D offers enhanced electrical margins and extended operating range.

Q: Are RoHS compliance differences significant for substitution?

A: RoHS compliance status reflects regulatory requirements applicable at the time of manufacture. A3C-18DA-2DSA(71) and SMM-109-01-S-D both meet current RoHS standards (RoHS Compliant and ROHS3 Compliant respectively), making them suitable for applications subject to RoHS directives. The original A3C-18DA-2DSA is RoHS non-compliant and should not be selected for new designs subject to RoHS requirements.