A3C-32P-2DSA Equivalent & Substitute Parts

Part Overview

The A3C-32P-2DSA is a rectangular connector header manufactured by Hirose Electric Co Ltd, designed for through-hole mounting with 32 positions arranged in 2 rows at 0.079" (2.00mm) pitch. This connector 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
Manufacturer Part Number	A3C-32P-2DSA
Manufacturer	Hirose Electric Co Ltd
Category	Rectangular Connectors
Connector Type	Header
Contact Type	Male Pin
Pitch - Mating	0.079" (2.00mm)
Number of Positions	32
Number of Rows	2
Row Spacing - Mating	0.079" (2.00mm)
Mounting Type	Through Hole
Termination	Solder
Fastening Type	Push-Pull
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
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitute parts for the A3C-32P-2DSA are identified based on the following critical parameters that must align for functional equivalence:

Primary Matching Criteria:

Pitch - Mating: 0.079" (2.00mm)
Number of Positions: 32
Number of Rows: 2
Row Spacing - Mating: 0.079" (2.00mm)
Connector Type: Header
Contact Type: Male Pin
Mounting Type: Through Hole
Termination: Solder
Fastening Type: Push-Pull
Style: Board to Board or Cable
Shrouding: Unshrouded

Secondary Compatibility Parameters:

Contact Shape: Square
Insulation Color: Black
Material Flammability Rating: UL94 V-0
Moisture Sensitivity Level: 1 (Unlimited)

Substitutes are grouped into two categories: direct equivalents from Hirose (same series, active status) and manufacturer-recommended alternatives from Samtec Inc. (MTMM series, active status with enhanced specifications).

Parameter Comparison

Parameter	A3C-32P-2DSA	A3C-32P-2DSA(30)	MTMM-116-02-G-D-115	MTMM-116-02-G-D-125	MTMM-116-02-G-D-140	MTMM-116-02-S-D-116	MTMM-116-02-T-D-150
Manufacturer	Hirose	Hirose	Samtec	Samtec	Samtec	Samtec	Samtec
Product Status	Obsolete	Active	Active	Active	Active	Active	Active
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)
Number of Positions	32	32	32	32	32	32	32
Number of Rows	2	2	2	2	2	2	2
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)
Contact Type	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Termination	Solder	Solder	Solder	Solder	Solder	Solder	Solder
Fastening Type	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Push-Pull
Contact Material	Brass	Brass	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)
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 ~ 105°C
Current Rating	1A	2A	3A	3A	3A	3A	3A
Contact Finish - Mating	Gold	Gold	Gold	Gold	Gold	Gold	Tin
Insulation Height	0.035" (0.90mm)	0.035" (0.90mm)	0.059" (1.50mm)	0.059" (1.50mm)	0.059" (1.50mm)	0.059" (1.50mm)	0.059" (1.50mm)
Material Flammability Rating	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0
RoHS Status	Not specified	RoHS Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Parameter	MTMM-116-03-F-D-145	MTMM-116-03-G-D-125	MTMM-116-03-G-D-140	MTMM-116-03-G-D-150
Manufacturer	Samtec	Samtec	Samtec	Samtec
Product Status	Active	Active	Active	Active
Pitch - Mating	0.079" (2.00mm)	0.079" (2.00mm)	0.079" (2.00mm)	0.079" (2.00mm)
Number of Positions	32	32	32	32
Number of Rows	2	2	2	2
Row Spacing - Mating	0.079" (2.00mm)	0.079" (2.00mm)	0.079" (2.00mm)	0.079" (2.00mm)
Contact Type	Male Pin	Male Pin	Male Pin	Male Pin
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole
Termination	Solder	Solder	Solder	Solder
Fastening Type	Push-Pull	Push-Pull	Push-Pull	Push-Pull
Contact Material	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze
Insulation Material	Liquid Crystal Polymer (LCP)	Liquid Crystal Polymer (LCP)	Liquid Crystal Polymer (LCP)	Liquid Crystal Polymer (LCP)
Operating Temperature	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C
Current Rating	3A	3A	3A	3A
Contact Finish - Mating	Gold	Gold	Gold	Gold
Insulation Height	0.059" (1.50mm)	0.059" (1.50mm)	0.059" (1.50mm)	0.059" (1.50mm)
Material Flammability Rating	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Direct Equivalent (Recommended for Obsolete Part Replacement):

A3C-32P-2DSA(30) is the direct equivalent from Hirose Electric Co Ltd. This part maintains identical mechanical and electrical specifications to the original A3C-32P-2DSA while offering active product status. The primary advantage is design continuity with the same manufacturer, series, and form factor. Current rating increases from 1A to 2A, providing enhanced capacity. RoHS compliance is confirmed for this variant.

Samtec MTMM-116 Series (Alternative Substitutes):

The Samtec MTMM-116 series provides functional substitutes with the following considerations:

All MTMM-116 variants maintain the critical 0.079" (2.00mm) pitch, 32-position, 2-row configuration and through-hole solder termination. These parts feature phosphor bronze contacts instead of brass, offering improved durability. Insulation material transitions from polyamide to liquid crystal polymer (LCP), providing enhanced thermal and mechanical properties.

Current rating increases to 3A across all MTMM-116 variants, exceeding the original 1A specification. Operating temperature extends to -55°C ~ 125°C (except MTMM-116-02-T-D-150 at -55°C ~ 105°C), compared to the original -55°C ~ 85°C range. All MTMM-116 parts are ROHS3 compliant.

Contact Length Variations:

MTMM-116 parts are available with different contact length configurations (designated by the third numeric field and suffix):

02-series: Overall contact length 0.255" (6.48mm), insulation height 0.059" (1.50mm)
03-series: Overall contact length 0.302" (7.67mm), insulation height 0.059" (1.50mm)

Contact length and post length variations allow accommodation of different PCB thicknesses and mating depths. Selection depends on specific board-to-board spacing requirements.

Contact Finish Options:

Gold-plated contacts (G-series) provide corrosion resistance and are recommended for general applications. Tin-plated contacts (T-series) and mixed finishes (S-series with tin posts) are available for cost optimization where corrosion resistance requirements are less stringent.

Product Status and Compliance:

All substitute parts carry active product status, ensuring long-term availability and supply chain stability. RoHS3 compliance is confirmed for all Samtec alternatives, supporting environmental and regulatory requirements.

Frequently Asked Questions (FAQ)

Q: Can A3C-32P-2DSA(30) be used as a direct replacement for A3C-32P-2DSA?

A: Yes. A3C-32P-2DSA(30) is the direct equivalent with identical pitch, position count, row configuration, and mounting type. The primary difference is active product status versus obsolete status. Current rating increases from 1A to 2A, which is beneficial for most applications. Verify that the increased current capacity does not conflict with circuit design constraints.

Q: What are the key differences between Hirose A3C-32P-2DSA(30) and Samtec MTMM-116 series?

A: Both maintain the 0.079" (2.00mm) pitch and 32-position, 2-row configuration. Primary differences include contact material (brass versus phosphor bronze), insulation material (polyamide versus LCP), current rating (2A versus 3A), and operating temperature range (-55°C ~ 85°C versus -55°C ~ 125°C). Samtec parts offer enhanced thermal performance and higher current capacity. Insulation height increases from 0.035" to 0.059", which may affect PCB layout spacing.

Q: How do I select the correct MTMM-116 variant based on contact length?

A: Contact length is determined by application requirements for board-to-board spacing. MTMM-116-02-series provides 0.255" (6.48mm) overall contact length with varying mating contact lengths (0.115" to 0.150" depending on suffix). MTMM-116-03-series provides 0.302" (7.67mm) overall contact length with mating contact lengths from 0.125" to 0.150". Measure the required mating depth and select the appropriate series accordingly.

Q: Are all substitute parts RoHS compliant?

A: A3C-32P-2DSA(30) is RoHS compliant. All Samtec MTMM-116 variants are ROHS3 compliant. The original A3C-32P-2DSA does not specify RoHS status. Verify compliance requirements for your specific application before selection.

Q: What is the difference between gold-plated and tin-plated contact finishes?

A: Gold-plated contacts (G-series) provide superior corrosion resistance and are suitable for applications requiring long-term reliability in harsh environments. Tin-plated contacts (T-series) offer cost optimization for applications where corrosion resistance is less critical. Mixed finishes (S-series) combine gold mating surfaces with tin posts for balanced performance and cost.

Q: Can MTMM-116 parts be cut to reduce position count?

A: MTMM-116 parts are designated as cuttable headers, allowing customization of position count through mechanical cutting. A3C-32P-2DSA and A3C-32P-2DSA(30) are not specified as cuttable. If position reduction is required, MTMM-116 series provides this flexibility.

Q: What inventory levels are available for these parts?

A: A3C-32P-2DSA: 888 pcs. A3C-32P-2DSA(30): 782 pcs. MTMM-116 variants range from 848 to 1160 pcs depending on specific part number. Verify current inventory status with your supplier before finalizing procurement decisions.

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