Equivalent & Substitute Parts for A3-4PA-2SV

Part Overview

The A3-4PA-2SV is a rectangular connector header manufactured by Hirose Electric Co Ltd, designed for surface mount applications with 4 positions at 2.00mm pitch. This component is classified as obsolete, which necessitates identification of functionally equivalent alternatives for ongoing design support and procurement continuity. The part operates across a temperature range of -55°C to 85°C with a 1A current rating at 200V, utilizing gold-plated brass contacts on a polyphenylene sulfide (PPS) insulation body.

Key Parameters

Parameter	Value
Connector Type	Header
Contact Type	Male Pin
Pitch - Mating	0.079" (2.00mm)
Number of Positions	4
Number of Rows	2
Row Spacing - Mating	0.079" (2.00mm)
Mounting Type	Surface Mount
Termination	Solder
Fastening Type	Push-Pull
Contact Shape	Square
Operating Temperature	-55°C ~ 85°C
Current Rating	1A
Voltage Rating	200V
Material Flammability Rating	UL94 V-0
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the A3-4PA-2SV is determined by strict alignment with the following critical parameters:

Pitch - Mating: 0.079" (2.00mm)
Number of Positions: 4
Number of Rows: 2
Row Spacing - Mating: 0.079" (2.00mm)
Connector Type: Header
Contact Type: Male Pin
Mounting Type: Surface Mount
Termination: Solder
Fastening Type: Push-Pull
Contact Shape: Square
Material Flammability Rating: UL94 V-0
Moisture Sensitivity Level: 1 (Unlimited)

The identified substitute parts maintain these core electrical and mechanical parameters. Variations in contact material, insulation material, contact finish specifications, and operating temperature ranges are permitted within the scope of functional equivalence, provided the primary mating interface and electrical performance remain compatible.

Parameter Comparison

Parameter	A3-4PA-2SV	A3-4PA-2SV(71)	966926-2	TMM-102-05-G-D-SM	TMM-102-05-L-D-SM	TMM-102-05-S-D-SM	TMM-102-05-T-D-SM
Manufacturer	Hirose Electric Co Ltd	Hirose Electric Co Ltd	TE Connectivity AMP Connectors	Samtec Inc.	Samtec Inc.	Samtec Inc.	Samtec Inc.
Product Status	Obsolete	Active	Active	Active	Active	Active	Active
Connector Type	Header	Header	Header, Breakaway	Header	Header	Header	Header
Contact Type	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin
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	4	4	4	4	4	4	4
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)
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
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 Shape	Square	Square	Square	Square	Square	Square	Square
Contact Finish - Mating	Gold	Gold	Gold	Gold	Gold	Gold	Tin
Contact Material	Brass	Brass	Brass	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze
Insulation Material	Polyphenylene Sulfide (PPS)	Polyphenylene Sulfide (PPS)	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	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 105°C
Current Rating	1A	1A	1A	3.2A per Contact	3.2A per Contact	3.2A per Contact	3.2A per Contact
Voltage Rating	200V	200V	250VAC	Not specified	Not specified	Not specified	Not specified
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	RoHS non-compliant	ROHS3 Compliant	RoHS Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

Primary Recommendation: A3-4PA-2SV(71)

The A3-4PA-2SV(71) is the direct variant of the obsolete A3-4PA-2SV, manufactured by Hirose Electric Co Ltd. This part maintains identical electrical and mechanical specifications while offering active product status and ROHS3 compliance. Selection of this part eliminates design re-qualification requirements and preserves original component performance characteristics.

Secondary Recommendations: Samtec TMM Series (TMM-102-05-G-D-SM, TMM-102-05-L-D-SM, TMM-102-05-S-D-SM, TMM-102-05-T-D-SM)

The Samtec TMM series connectors satisfy all critical substitution parameters. These parts offer enhanced current capacity (3.2A per contact versus 1A) and extended operating temperature ranges (-55°C to 125°C). ROHS3 compliance is provided across all variants. Selection among TMM variants depends on contact finish requirements: TMM-102-05-G-D-SM provides gold mating finish, TMM-102-05-S-D-SM and TMM-102-05-L-D-SM provide gold mating finish with tin post finish, and TMM-102-05-T-D-SM provides tin mating finish.

Tertiary Recommendation: TE Connectivity 966926-2

The TE Connectivity 966926-2 (AMPMODU series) meets core substitution criteria with breakaway connector capability. This part features extended operating temperature range (-40°C to 105°C) and RoHS compliance. The insulation material differs (LCP versus PPS), and insulation height is reduced (0.035" versus 0.071"), which may impact mechanical fit in constrained applications.

Frequently Asked Questions (FAQ)

Q: Can A3-4PA-2SV(71) be used as a direct replacement for A3-4PA-2SV?

A: Yes. A3-4PA-2SV(71) is the active production variant of the obsolete A3-4PA-2SV, maintaining identical pitch (2.00mm), position count (4), row configuration (2), contact type (male pin), and electrical ratings (1A, 200V). The primary difference is product status (active versus obsolete) and RoHS compliance (ROHS3 versus non-compliant).

Q: What are the key differences between Hirose A3 series and Samtec TMM series substitutes?

A: Both maintain 2.00mm pitch and 4-position, 2-row configuration. Samtec TMM parts offer higher current capacity (3.2A per contact versus 1A) and wider operating temperature range (-55°C to 125°C versus -55°C to 85°C). Contact material differs (phosphor bronze versus brass). Insulation material differs (LCP versus PPS). All parts maintain UL94 V-0 flammability rating and MSL 1 moisture sensitivity.

Q: Are there packaging considerations when substituting these parts?

A: Yes. A3-4PA-2SV is supplied in standard packaging, A3-4PA-2SV(71) is supplied in tube packaging, TE Connectivity 966926-2 is supplied in bulk packaging, and all Samtec TMM variants are supplied in bulk packaging. Packaging differences may affect procurement quantities and handling procedures but do not impact electrical or mechanical compatibility.

Q: Does the insulation material change affect PCB layout or thermal performance?

A: Insulation material differs between Hirose parts (PPS) and substitute options (LCP for TE and Samtec). Both materials meet UL94 V-0 flammability requirements. LCP provides superior dimensional stability and lower moisture absorption. PCB layout compatibility is maintained across all substitutes due to identical pitch and position specifications.

Q: Which substitute part is recommended for high-current applications?

A: Samtec TMM series parts (TMM-102-05-G-D-SM, TMM-102-05-L-D-SM, TMM-102-05-S-D-SM, TMM-102-05-T-D-SM) support 3.2A per contact, compared to 1A for the original A3-4PA-2SV. These parts are suitable for applications requiring higher current capacity while maintaining 2.00mm pitch and 4-position configuration.

Q: What is the significance of contact finish variations in the Samtec TMM series?

A: TMM-102-05-G-D-SM provides gold mating finish with gold post finish. TMM-102-05-L-D-SM and TMM-102-05-S-D-SM provide gold mating finish with tin post finish, differing in gold thickness (10.0µin versus 30.0µin). TMM-102-05-T-D-SM provides tin mating finish with tin post finish. Contact finish selection affects corrosion resistance and solderability characteristics but does not impact mating interface compatibility.

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