A3C-48P-2DSA Equivalent & Substitute Parts

Part Overview

The A3C-48P-2DSA is a rectangular connector header manufactured by Hirose Electric Co Ltd, featuring 48 positions arranged in 2 rows with 0.079" (2.00mm) pitch. This through-hole, unshrouded header is designed for board-to-board or cable applications with 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	48
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
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 eligibility is determined by strict alignment with the following core parameters:

Connector Type & Contact Configuration: Header with male pins, 48 positions in 2 rows
Pitch Specification: 0.079" (2.00mm) mating pitch and row spacing
Mounting & Termination: Through-hole solder termination with push-pull fastening
Electrical Performance: Current and voltage ratings must meet or exceed 1A at 200V
Environmental Compliance: UL94 V-0 flammability rating and MSL 1 classification

Substitute parts are grouped into two categories:

Direct Equivalents (identical electrical and mechanical specifications):

A3C-48P-2DSA(30) — Active status variant with enhanced current rating (2A)

Functional Substitutes (compatible pitch, position count, and mounting with variations in contact materials, insulation height, or contact length):

M22-2022405 (Harwin Inc.) — Cuttable header variant with phosphor bronze contacts
MTMM series (Samtec Inc.) — Cuttable terminal strips with LCP insulation and enhanced temperature range
TMM series (Samtec Inc.) — Standard terminal strips with higher current capacity per contact

Parameter Comparison

Parameter	A3C-48P-2DSA	A3C-48P-2DSA(30)	M22-2022405	MTMM-124-02-S-D-125	MTMM-124-03-S-D-130	TMM-124-01-F-D
Manufacturer	Hirose Electric	Hirose Electric	Harwin Inc.	Samtec Inc.	Samtec Inc.	Samtec Inc.
Product Status	Obsolete	Active	Active	Active	Active	Active
Connector Type	Header	Header	Header, Cuttable	Header, Cuttable	Header, Cuttable	Header
Number of Positions	48	48	48	48	48	48
Number of Rows	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)
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)
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Termination	Solder	Solder	Solder	Solder	Solder	Solder
Fastening Type	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Push-Pull
Contact Material	Brass	Brass	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze
Insulation Material	Polyamide (PA), Nylon	Polyamide (PA), Nylon	Polyamide (PA6T), Nylon 6T	Liquid Crystal Polymer (LCP)	Liquid Crystal Polymer (LCP)	Liquid Crystal Polymer (LCP)
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)
Overall Contact Length	0.276" (7.00mm)	0.276" (7.00mm)	0.331" (8.40mm)	0.255" (6.48mm)	0.302" (7.67mm)	0.323" (8.20mm)
Current Rating	1A	2A	1A per Contact	3A	3A	3.2A per Contact
Operating Temperature	-55°C ~ 85°C	-55°C ~ 85°C	-40°C ~ 105°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C
Material Flammability Rating	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	—
RoHS Status	—	RoHS Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

A3C-48P-2DSA(30) is the primary substitute for the obsolete A3C-48P-2DSA. Both parts share identical mechanical and electrical specifications with the same manufacturer. The A3C-48P-2DSA(30) is active in production with RoHS compliance and higher current capacity (2A versus 1A), making it the direct replacement for new designs and legacy system updates.

M22-2022405 (Harwin Inc.) provides an active alternative with cuttable header functionality. It maintains the 2.00mm pitch and 48-position configuration with push-pull fastening. The phosphor bronze contact material and PA6T insulation offer enhanced durability. Operating temperature extends to 105°C, and ROHS3 compliance is confirmed. Overall contact length increases to 0.331" (8.40mm), requiring PCB layout verification.

MTMM series (Samtec Inc.) offers cuttable terminal strip variants with LCP insulation and extended operating temperature to 125°C. Current ratings reach 3A per contact. These parts feature variable contact lengths and mating contact specifications. MTMM-124-02-S-D-125, MTMM-124-03-S-D-130, and MTMM-124-03-G-D-135-023 are ROHS3 compliant with MSL 1 classification. MTMM-124-03-G-D-135-023 loads 47 of 48 positions, requiring design confirmation.

TMM series (Samtec Inc.) provides non-cuttable header alternatives with 3.2A per contact current capacity and 125°C operating temperature. TMM-124-01-F-D and TMM-124-01-G-D-P are ROHS3 compliant with LCP insulation. TMM-124-01-G-D-P includes pick-and-place features for automated assembly. Material flammability rating is not specified for TMM series.

Selection should prioritize active product status and compliance certifications. For legacy system maintenance, A3C-48P-2DSA(30) is recommended. For new designs requiring enhanced thermal performance or higher current capacity, Samtec MTMM or TMM series provide superior specifications with full ROHS3 compliance.

Frequently Asked Questions (FAQ)

Q: Can A3C-48P-2DSA(30) be used as a direct replacement for A3C-48P-2DSA?

A: Yes. Both parts are manufactured by Hirose Electric with identical pitch (0.079"), position count (48), row configuration (2), mounting type (through-hole), and termination (solder). The A3C-48P-2DSA(30) is active in production and offers higher current capacity (2A versus 1A). Mechanical compatibility is confirmed.

Q: What is the primary difference between Hirose A3C series and Samtec MTMM/TMM series?

A: Contact material differs: A3C uses brass contacts while MTMM and TMM use phosphor bronze. Insulation material varies: A3C uses polyamide (nylon) while MTMM/TMM use liquid crystal polymer (LCP). Operating temperature extends from 85°C (A3C) to 125°C (MTMM/TMM). Current capacity increases from 1A to 3A or 3.2A per contact. All maintain 0.079" (2.00mm) pitch and 48-position configuration.

Q: Are cuttable header variants compatible with non-cuttable designs?

A: Cuttable headers (M22-2022405, MTMM series) and non-cuttable headers (A3C, TMM series) share identical mating pitch and position count. Mechanical compatibility depends on PCB layout and connector housing design. Cuttable variants allow field customization of position count, while non-cuttable parts provide fixed 48-position configuration. Verify connector housing compatibility before substitution.

Q: What is the impact of insulation height variation?

A: A3C-48P-2DSA specifies 0.035" (0.90mm) insulation height. Substitute parts from Harwin and Samtec specify 0.059" (1.50mm). Increased insulation height affects PCB clearance and mating connector engagement depth. PCB layout and connector housing must accommodate the taller insulation profile. Measure existing board-to-board spacing before substitution.

Q: Which substitute parts are ROHS3 compliant?

A: A3C-48P-2DSA(30), M22-2022405, MTMM-124-02-S-D-125, MTMM-124-03-G-D-135-023, MTMM-124-03-S-D-130, MTMM-124-04-F-D-154, MTMM-124-04-L-D-154, MTMM-124-05-T-D-150, TMM-124-01-F-D, and TMM-124-01-G-D-P are ROHS3 compliant. The original A3C-48P-2DSA does not specify RoHS status. TMM-124-01-F-D and TMM-124-01-G-D-P do not specify material flammability rating.

Q: What is the operating temperature range for each substitute?

A: A3C-48P-2DSA and A3C-48P-2DSA(30) operate from -55°C to 85°C. M22-2022405 operates from -40°C to 105°C. MTMM series and TMM series operate from -55°C to 125°C. Design applications requiring temperatures above 85°C require substitution to Samtec or Harwin alternatives.

Q: Are all substitute parts available in bulk packaging?

A: A3C-48P-2DSA(30) and TMM-124-01-F-D are available in bulk packaging. M22-2022405 is available in bulk. MTMM series parts do not specify packaging type. Original A3C-48P-2DSA packaging is not specified. Confirm packaging requirements with supplier for production volume orders.

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