A3C-12P-2DSA Equivalent & Substitute Parts

Part Overview

The A3C-12P-2DSA is a rectangular connector header manufactured by Hirose Electric Co Ltd, featuring 12 positions across 2 rows with 0.079" (2.00mm) pitch. This through-hole solder-terminated connector is designed for board-to-board or cable applications with unshrouded, push-pull fastening. The part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.

Key Parameters

Parameter	Value
Connector Type	Header
Contact Type	Male Pin
Number of Positions	12
Number of Rows	2
Pitch - Mating	0.079" (2.00mm)
Row Spacing - Mating	0.079" (2.00mm)
Mounting Type	Through Hole
Termination	Solder
Fastening Type	Push-Pull
Contact Shape	Square
Insulation Material	Polyamide (PA), Nylon
Operating Temperature	-55°C ~ 85°C
Current Rating	1A
Voltage Rating	200V
Material Flammability Rating	UL94 V-0
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution for the A3C-12P-2DSA is determined by strict alignment of the following critical parameters:

Connector configuration: 12 positions, 2 rows, 0.079" (2.00mm) mating pitch, 0.079" (2.00mm) row spacing
Electrical characteristics: Male pin contact type, square contact shape, solder termination, push-pull fastening
Mounting and installation: Through-hole mounting, board-to-board or cable style, unshrouded design
Environmental compliance: UL94 V-0 flammability rating, MSL 1 (Unlimited)

The direct equivalent A3C-12P-2DSA(30) from Hirose Electric maintains identical electrical and mechanical specifications with active product status and RoHS compliance. Samtec MTMM-106 series parts provide functional substitutes with compatible pitch, position count, and row configuration, though with variations in contact length, insulation height, contact material, and operating temperature range.

Parameter Comparison

Parameter	A3C-12P-2DSA	A3C-12P-2DSA(30)	MTMM-106-02-F-D-135	MTMM-106-02-F-D-136	MTMM-106-02-F-D-140	MTMM-106-02-F-D-145	MTMM-106-02-F-D-150	MTMM-106-02-G-D-110	MTMM-106-02-G-D-115	MTMM-106-02-G-D-125	MTMM-106-02-G-D-137
Manufacturer	Hirose Electric Co Ltd	Hirose Electric Co Ltd	Samtec Inc.	Samtec Inc.	Samtec Inc.	Samtec Inc.	Samtec Inc.	Samtec Inc.	Samtec Inc.	Samtec Inc.	Samtec Inc.
Connector Type	Header	Header	Header, Cuttable	Header, Cuttable	Header, Cuttable	Header, Cuttable	Header, Cuttable	Header, Cuttable	Header, Cuttable	Header, Cuttable	Header, Cuttable
Contact Type	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin
Number of Positions	12	12	12	12	12	12	12	12	12	12	12
Number of Rows	2	2	2	2	2	2	2	2	2	2	2
Pitch - Mating	0.079" (2.00mm)	0.079" (2.00mm)	0.079" (2.00mm)	0.079" (2.00mm)	0.079" (2.00mm)	0.079" (2.00mm)	0.079" (2.00mm)	0.079" (2.00mm)	0.079" (2.00mm)	0.079" (2.00mm)	0.079" (2.00mm)
Row Spacing - Mating	0.079" (2.00mm)	0.079" (2.00mm)	0.079" (2.00mm)	0.079" (2.00mm)	0.079" (2.00mm)	0.079" (2.00mm)	0.079" (2.00mm)	0.079" (2.00mm)	0.079" (2.00mm)	0.079" (2.00mm)	0.079" (2.00mm)
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Termination	Solder	Solder	Solder	Solder	Solder	Solder	Solder	Solder	Solder	Solder	Solder
Fastening Type	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Push-Pull
Contact Shape	Square	Square	Square	Square	Square	Square	Square	Square	Square	Square	Square
Contact Length - Mating	0.138" (4.60mm)	0.138" (4.60mm)	0.135" (3.43mm)	0.136" (3.45mm)	0.140" (4.66mm)	0.145" (3.70mm)	0.150" (3.81mm)	0.110" (2.79mm)	0.115" (2.92mm)	0.125" (3.18mm)	0.137" (3.48mm)
Contact Length - Post	0.102" (2.60mm)	0.102" (2.60mm)	0.061" (1.55mm)	0.060" (1.52mm)	0.056" (1.42mm)	0.051" (1.30mm)	0.046" (1.17mm)	0.086" (2.18mm)	0.081" (2.06mm)	0.071" (1.80mm)	0.059" (1.50mm)
Overall Contact Length	0.276" (7.00mm)	0.276" (7.00mm)	0.255" (6.48mm)	0.255" (6.48mm)	0.255" (6.48mm)	0.255" (6.48mm)	0.255" (6.48mm)	0.255" (6.48mm)	0.255" (6.48mm)	0.255" (6.48mm)	0.255" (6.48mm)
Insulation Height	0.035" (0.90mm)	0.173" (4.40mm)	0.059" (1.50mm)	0.059" (1.50mm)	0.059" (1.50mm)	0.059" (1.50mm)	0.059" (1.50mm)	0.059" (1.50mm)	0.059" (1.50mm)	0.059" (1.50mm)	0.059" (1.50mm)
Contact Finish - Mating	Gold	Gold	Gold	Gold	Gold	Gold	Gold	Gold	Gold	Gold	Gold
Contact Material	Brass	Brass	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze
Insulation Material	Polyamide (PA), Nylon	Polyamide (PA), Nylon	Liquid Crystal Polymer (LCP)	Liquid Crystal Polymer (LCP)	Liquid Crystal Polymer (LCP)	Liquid Crystal Polymer (LCP)	Liquid Crystal Polymer (LCP)	Liquid Crystal Polymer (LCP)	Liquid Crystal Polymer (LCP)	Liquid Crystal Polymer (LCP)	Liquid Crystal Polymer (LCP)
Operating Temperature	-55°C ~ 85°C	-55°C ~ 85°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C
Current Rating	1A	1A	3A	3A	3A	3A	3A	3A	3A	3A	3A
Material Flammability Rating	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Product Status	Obsolete	Active	Active	Active	Active	Active	Active	Active	Active	Active	Active
RoHS Status	Not specified	RoHS Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Direct Equivalent: A3C-12P-2DSA(30) from Hirose Electric Co Ltd is the primary equivalent, maintaining identical electrical and mechanical specifications while offering active product status and RoHS compliance. This part is recommended for direct replacement in new designs and ongoing production.

Functional Substitutes: The Samtec MTMM-106 series provides functional alternatives with compatible 12-position, 2-row, 0.079" (2.00mm) pitch configuration. These parts feature active product status and ROHS3 compliance. Selection within the MTMM-106 series depends on specific contact length requirements:

MTMM-106-02-F-D variants feature tin-plated posts with mating contact lengths ranging from 0.135" to 0.150" (3.43mm to 3.81mm)
MTMM-106-02-G-D variants feature gold-plated posts with mating contact lengths ranging from 0.110" to 0.137" (2.79mm to 3.48mm)

All Samtec substitutes provide enhanced operating temperature range (-55°C to 125°C versus -55°C to 85°C) and higher current rating (3A versus 1A). Insulation material differs from the original (Liquid Crystal Polymer versus Polyamide/Nylon), and contact material is Phosphor Bronze instead of Brass.

Frequently Asked Questions (FAQ)

Q: Can A3C-12P-2DSA(30) be used as a direct replacement for A3C-12P-2DSA?

A: Yes. A3C-12P-2DSA(30) maintains identical electrical and mechanical specifications including connector type, contact configuration, pitch, row spacing, mounting type, termination method, and fastening type. The primary difference is product status (Active versus Obsolete) and RoHS compliance certification.

Q: What are the key differences between Hirose A3C-12P-2DSA and Samtec MTMM-106 series?

A: Both maintain compatible 12-position, 2-row, 0.079" (2.00mm) pitch configuration and push-pull fastening. Differences include: contact material (Brass versus Phosphor Bronze), insulation material (Polyamide/Nylon versus Liquid Crystal Polymer), contact length variations, operating temperature range (85°C versus 125°C maximum), and current rating (1A versus 3A).

Q: How do I select the correct MTMM-106 variant?

A: Selection depends on required mating contact length. MTMM-106-02-F-D variants range from 0.135" to 0.150" mating contact length with tin-plated posts. MTMM-106-02-G-D variants range from 0.110" to 0.137" mating contact length with gold-plated posts. Verify compatibility with your PCB layout and mating connector specifications.

Q: Are all substitute parts RoHS compliant?

A: A3C-12P-2DSA(30) is RoHS Compliant. All Samtec MTMM-106 series parts are ROHS3 Compliant. The original A3C-12P-2DSA does not specify RoHS status.

Q: What is the difference between F-D and G-D contact finish options in the MTMM-106 series?

A: F-D variants feature tin-plated posts with 3.00µin (0.076µm) gold mating contact finish. G-D variants feature gold-plated posts with 20.0µin (0.51µm) gold mating contact finish and 3.00µin (0.076µm) post finish.

Q: Can MTMM-106 parts be used in applications requiring 1A current rating?

A: Yes. MTMM-106 parts are rated for 3A current, which exceeds the 1A requirement of the original A3C-12P-2DSA. This provides design margin for current-sensitive applications.

Q: Are packaging differences significant for procurement?

A: A3C-12P-2DSA(30) and MTMM-106-02-F-D-150 are available in Bulk packaging. Other variants do not specify packaging type. Confirm packaging requirements with your procurement specifications.

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