A3C-24DA-2DSA Rectangular Connector Equivalent & Substitute Parts

Part Overview

The A3C-24DA-2DSA is a 24-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 main part is classified as obsolete, making equivalent substitutes necessary for ongoing production and maintenance applications. Substitute parts maintain functional compatibility while offering improved availability and compliance status.

Key Parameters

Parameter	Value
Connector Type	Receptacle
Contact Type	Female Socket
Number of Positions	24
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 is determined by strict alignment with the following core parameters:

Connector Type: Receptacle
Number of Positions: 24
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

Substitute parts must maintain these electrical and mechanical specifications to ensure direct compatibility with existing mating connectors and PCB layouts. Variations in secondary parameters such as contact material, insulation material, or operating temperature range do not preclude substitution provided the primary parameters remain constant.

Parameter Comparison

Parameter	A3C-24DA-2DSA	A3C-24DA-2DSA(71)	SMM-112-01-S-D
Manufacturer	Hirose Electric Co Ltd	Hirose Electric Co Ltd	Samtec Inc.
Product Status	Obsolete	Active	Active
Connector Type	Receptacle	Receptacle	Receptacle
Number of Positions	24	24	24
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
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
RoHS Status	RoHS non-compliant	RoHS Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Inventory Status	699 Pcs New Original In Stock	1065 Pcs New Original In Stock	853 Pcs New Original In Stock

Engineering Selection Recommendations

Both A3C-24DA-2DSA(71) and SMM-112-01-S-D are electrically and mechanically compatible substitutes for the obsolete A3C-24DA-2DSA.

A3C-24DA-2DSA(71) is the direct manufacturer variant from Hirose Electric Co Ltd with active product status and RoHS compliance. This part maintains identical electrical specifications and operating temperature range as the original, differing only in packaging format (Tube) and compliance certification upgrade.

SMM-112-01-S-D from Samtec Inc. (Tiger Eye™ SMM series) provides enhanced electrical performance with higher current rating (3.2A per contact versus 1A) and voltage rating (350VAC versus 200VAC), along with extended operating temperature range (-55°C ~ 125°C). This part is suitable for applications requiring higher electrical margins or elevated temperature operation while maintaining mechanical and mating interface compatibility.

Selection between substitutes should be based on product availability, compliance requirements, and application electrical demands.

Frequently Asked Questions (FAQ)

Q: Can A3C-24DA-2DSA(71) be used as a direct replacement for A3C-24DA-2DSA?

A: Yes. Both parts share identical electrical and mechanical specifications including connector type, position count, pitch spacing, mounting method, and contact finish. The primary difference is product status (active versus obsolete) and RoHS compliance certification.

Q: Is SMM-112-01-S-D compatible with existing A3C-24DA-2DSA mating connectors?

A: Yes. SMM-112-01-S-D maintains the same pitch spacing (0.079"), row configuration (2 rows), and push-pull fastening mechanism, ensuring mechanical and electrical compatibility with existing mating connectors designed for the A3C-24DA-2DSA.

Q: What are the key differences between A3C-24DA-2DSA(71) and SMM-112-01-S-D?

A: Both parts are mechanically compatible substitutes. A3C-24DA-2DSA(71) maintains identical electrical specifications to the original part. SMM-112-01-S-D offers higher current rating (3.2A per contact), higher voltage rating (350VAC), and extended operating temperature range (-55°C ~ 125°C), making it suitable for more demanding applications.

Q: Are there packaging differences between the substitute parts?

A: A3C-24DA-2DSA(71) is supplied in Tube packaging. SMM-112-01-S-D is also supplied in Tube packaging. Both are suitable for standard component handling and assembly processes.

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

A: Selection depends on application requirements. For direct compatibility with existing specifications, A3C-24DA-2DSA(71) is recommended. For applications requiring higher electrical performance or extended temperature operation, SMM-112-01-S-D is appropriate.

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