A3C-28DA-2DSA Rectangular Connector - Equivalent & Substitute Parts

Part Overview

The A3C-28DA-2DSA is a 28-position 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 classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing design support and procurement.

Key Parameters

Parameter	Value
Connector Type	Receptacle
Number of Positions	28
Pitch - Mating	0.079" (2.00mm)
Number of Rows	2
Row Spacing - Mating	0.079" (2.00mm)
Mounting Type	Through Hole
Termination	Solder
Fastening Type	Push-Pull
Contact Finish - Mating	Gold
Current Rating	1A
Voltage Rating	200VAC
Operating Temperature	-55°C ~ 85°C
Material Flammability Rating	UL94 V-0

Substitute Part Grouping Explanation

Substitution eligibility for the A3C-28DA-2DSA is determined by the following critical parameters:

28-position configuration with 2-row layout
0.079" (2.00mm) mating pitch and row spacing
Receptacle connector type with female socket contacts
Through-hole solder termination with push-pull fastening
Gold-plated mating contacts
UL94 V-0 flammability rating
Operating temperature range of -55°C minimum

Substitute parts must maintain these core electrical and mechanical specifications to ensure PCB footprint compatibility and functional interchangeability. Variations in contact material, insulation material, current rating, voltage rating, and product status are permitted provided the above parameters remain constant.

Parameter Comparison

Parameter	A3C-28DA-2DSA	A3C-28DA-2DSA(71)	SMM-114-01-S-D
Manufacturer	Hirose Electric Co Ltd	Hirose Electric Co Ltd	Samtec Inc.
Product Status	Obsolete	Active	Active
Number of Positions	28	28	28
Pitch - Mating	0.079" (2.00mm)	0.079" (2.00mm)	0.079" (2.00mm)
Number of Rows	2	2	2
Row Spacing - Mating	0.079" (2.00mm)	0.079" (2.00mm)	0.079" (2.00mm)
Mounting Type	Through Hole	Through Hole	Through Hole
Termination	Solder	Solder	Solder
Fastening Type	Push-Pull	Push-Pull	Push-Pull
Contact Finish - Mating	Gold	Gold	Gold
Contact Type	Female Socket	Female Socket	Female Socket
Current Rating	1A	1A	3.2A per Contact
Voltage Rating	200VAC	200VAC	350VAC
Operating Temperature	-55°C ~ 85°C	-55°C ~ 85°C	-55°C ~ 125°C
Material Flammability Rating	UL94 V-0	UL94 V-0	UL94 V-0
Insulation Material	Polybutylene Terephthalate (PBT)	Polybutylene Terephthalate (PBT)	Liquid Crystal Polymer (LCP)
Contact Material	Phosphor Bronze	Phosphor Bronze	Beryllium Copper
RoHS Status	RoHS non-compliant	RoHS Compliant	ROHS3 Compliant

Engineering Selection Recommendations

The A3C-28DA-2DSA-2DSA(71) is the direct equivalent from Hirose Electric Co Ltd. This part maintains identical electrical and mechanical specifications while offering active product status and RoHS compliance, addressing the obsolescence of the original part number.

The SMM-114-01-S-D from Samtec Inc. provides an alternative rectangular connector with the same 28-position, 2.00mm pitch configuration and push-pull fastening. This part exceeds the original specifications in current rating (3.2A per contact versus 1A), voltage rating (350VAC versus 200VAC), and operating temperature range (-55°C to 125°C versus -55°C to 85°C). The SMM-114-01-S-D uses Liquid Crystal Polymer insulation and Beryllium Copper contacts instead of PBT and Phosphor Bronze, and carries ROHS3 compliance.

Selection between these substitutes depends on application requirements. For direct replacement with minimal design changes, the A3C-28DA-2DSA(71) is appropriate. For applications requiring higher current capacity, voltage tolerance, or extended temperature operation, the SMM-114-01-S-D offers enhanced performance margins.

Frequently Asked Questions (FAQ)

Q: Can the A3C-28DA-2DSA(71) be used as a direct replacement for the A3C-28DA-2DSA?

A: Yes. Both parts share identical connector type, position count, pitch spacing, row configuration, mounting method, termination type, and fastening mechanism. The primary difference is product status (active versus obsolete) and RoHS compliance. No PCB redesign is required.

Q: What are the key differences between the Hirose A3C-28DA-2DSA(71) and the Samtec SMM-114-01-S-D?

A: Both maintain the same 28-position, 2.00mm pitch, through-hole solder configuration. The SMM-114-01-S-D provides higher current rating (3.2A per contact), higher voltage rating (350VAC), extended operating temperature range (-55°C to 125°C), and uses different insulation material (LCP versus PBT) and contact material (Beryllium Copper versus Phosphor Bronze).

Q: Are there packaging differences between these parts?

A: Yes. The A3C-28DA-2DSA is supplied in standard packaging, the A3C-28DA-2DSA(71) is supplied in trays, and the SMM-114-01-S-D is supplied in tubes. Packaging does not affect electrical or mechanical compatibility.

Q: Which substitute part should be selected for new designs?

A: Selection depends on application electrical requirements. For general-purpose applications matching the original 1A/200VAC specification, either the A3C-28DA-2DSA(71) or SMM-114-01-S-D is suitable. For applications requiring higher current or voltage margins, the SMM-114-01-S-D is preferred. Both substitutes carry current compliance certifications.

Q: Do all three parts have the same PCB footprint?

A: Yes. All three parts maintain identical 28-position configuration, 0.079" (2.00mm) mating pitch, 2-row layout, and 0.079" (2.00mm) row spacing. PCB footprints are interchangeable without modification.

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