Hirose A3C-10P-2DSA Equivalent & Substitute Parts

Part Overview

The Hirose A3C-10P-2DSA is a rectangular connector header with 10 positions arranged in 2 rows at 0.079" (2.00mm) pitch. This through-hole component features male pins with gold-plated brass contacts, solder termination, and 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	10
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 Finish - Mating	Gold
Contact Material	Brass
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-10P-2DSA is determined by strict alignment of electrical and mechanical parameters. The critical substitution criteria are:

Primary Matching Parameters:

10 positions in 2-row configuration
0.079" (2.00mm) mating pitch and row spacing
Male pin contact type
Through-hole solder termination
Push-pull fastening mechanism
Square contact shape
UL94 V-0 flammability rating
Moisture Sensitivity Level 1

Secondary Compatibility Parameters:

Contact finish (gold or tin acceptable for equivalent function)
Contact material (brass or phosphor bronze acceptable)
Insulation material (polyamide or liquid crystal polymer acceptable)
Operating temperature range (must meet or exceed -55°C ~ 85°C minimum)
Current rating (must meet or exceed 1A minimum)

Substitute parts are grouped into two categories: direct equivalents from Hirose (same manufacturer, active status) and cross-manufacturer alternatives from Harwin and Samtec that maintain full electrical and mechanical compatibility.

Parameter Comparison

Parameter	A3C-10P-2DSA	A3C-10P-2DSA(30)	M22-2020505	M22-2020546	M22-2520505	MTMM-105-02-F-D-120	MTMM-105-02-F-D-140	MTMM-105-02-G-D-110	MTMM-105-02-G-D-138	MTMM-105-02-G-D-143
Manufacturer	Hirose	Hirose	Harwin	Harwin	Harwin	Samtec	Samtec	Samtec	Samtec	Samtec
Product Status	Obsolete	Active	Active	Active	Active	Active	Active	Active	Active	Active
Connector Type	Header	Header	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
Number of Positions	10	10	10	10	10	10	10	10	10	10
Number of Rows	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)
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)
Mounting Type	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
Fastening Type	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Push-Pull
Contact Length - Mating	0.138" (4.60mm)	0.138" (4.60mm)	0.138" (4.60mm)	0.138" (4.60mm)	0.138" (4.60mm)	0.120" (3.05mm)	0.140" (4.66mm)	0.110" (2.79mm)	0.138" (4.60mm)	0.143" (3.63mm)
Contact Finish - Mating	Gold	Gold	Gold	Tin	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
Insulation Material	Polyamide (PA), Nylon	Polyamide (PA), Nylon	Polyamide (PA6T), Nylon 6T	Polyamide (PA6T), Nylon 6T	Polyamide (PA6T), Nylon 6T	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	-40°C ~ 105°C	-40°C ~ 105°C	-40°C ~ 105°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	1A per Contact	1A per Contact	1A per Contact	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
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	Not Applicable	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
RoHS Status	Not specified	RoHS Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Hirose Direct Equivalent: A3C-10P-2DSA(30) is the primary substitute. It maintains identical electrical and mechanical specifications to the obsolete A3C-10P-2DSA while offering active product status and RoHS compliance. This part is recommended for direct replacement in existing designs with no modifications required.

Harwin M22 Series: M22-2020505, M22-2020546, and M22-2520505 are functionally equivalent alternatives. All three maintain the required 10-position, 2-row, 2.00mm pitch configuration with through-hole solder termination and push-pull fastening. The M22 series offers extended operating temperature range (-40°C ~ 105°C), ROHS3 compliance, and REACH unaffected status. Contact finish variations (gold or tin) and contact length differences do not affect electrical compatibility. M22-2020546 features tin plating on both mating and post contacts, while M22-2020505 and M22-2520505 use gold mating finish.

Samtec MTMM Series: MTMM-105-02-F-D-120, MTMM-105-02-F-D-140, MTMM-105-02-G-D-110, MTMM-105-02-G-D-138, and MTMM-105-02-G-D-143 provide cross-manufacturer compatibility. All MTMM variants maintain the 10-position, 2-row, 2.00mm pitch specification with solder termination and push-pull fastening. The MTMM series offers superior current rating (3A versus 1A), extended operating temperature (-55°C ~ 125°C), and ROHS3 compliance. Contact length variations across the MTMM lineup accommodate different PCB stack-up requirements while maintaining mating compatibility. The "F" designation indicates gold mating finish with tin post finish; the "G" designation indicates gold on both mating and post surfaces.

All substitute parts carry UL94 V-0 flammability certification and MSL 1 rating, ensuring compatibility with standard manufacturing and storage conditions.

Frequently Asked Questions (FAQ)

Q: Can I use the Harwin M22 series as a direct replacement for the Hirose A3C-10P-2DSA? A: Yes. The M22-2020505, M22-2020546, and M22-2520505 maintain identical mating pitch (0.079" / 2.00mm), row spacing, position count (10 in 2 rows), contact type (male pin), termination (solder), and fastening mechanism (push-pull). All are through-hole components with UL94 V-0 rating and MSL 1 classification. No PCB layout modifications are required.

Q: What is the difference between the Samtec MTMM variants? A: The MTMM variants differ in contact length specifications and contact finish. The numeric suffix in the part number indicates mating contact length (e.g., -120 = 0.120", -140 = 0.140", -110 = 0.110", -138 = 0.138", -143 = 0.143"). The letter designation indicates finish: "F" = gold mating with tin post; "G" = gold on both mating and post. All variants maintain the same 0.079" (2.00mm) pitch and 2-row configuration. Selection depends on PCB thickness and stack-up requirements.

Q: Are there compliance differences between the substitute parts? A: The Hirose A3C-10P-2DSA(30) and all Harwin M22 variants are ROHS3 compliant. Samtec MTMM parts are ROHS3 compliant. All substitute parts carry UL94 V-0 flammability rating. Harwin M22 parts include REACH unaffected status. The original A3C-10P-2DSA does not specify RoHS status. For new designs, all listed substitutes meet current regulatory requirements.

Q: Can I mix contact finishes in the same connector? A: The substitute parts are specified with consistent contact finish across all 10 positions. Mixing finishes is not supported by the provided specifications and should not be attempted.

Q: What is the significance of the contact length variations in the Samtec MTMM series? A: Contact length determines how deeply the pin engages with the mating receptacle. Variations accommodate different PCB thicknesses and stack-up configurations. Selection should be based on your specific PCB assembly requirements. All MTMM variants maintain electrical compatibility at the 0.079" (2.00mm) pitch.

Q: Is the Samtec MTMM series suitable for higher current applications? A: The MTMM series is rated for 3A per contact, compared to 1A for the original A3C-10P-2DSA. If your application requires only 1A, the MTMM series remains fully compatible. The higher current rating provides additional design margin but does not affect compatibility with 1A designs.

Q: What does "cuttable" mean on the Harwin and Samtec parts? A: Cuttable indicates that the connector header can be cut to a shorter length if required for specific applications. This feature does not affect compatibility with standard 10-position configurations.

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