Equivalent & Substitute Parts for A4B-3PA-2DSA(71)

Part Overview

The A4B-3PA-2DSA(71) is a rectangular connector header manufactured by Hirose Electric Co Ltd, designed for through-hole mounting applications. This 3-position connector operates at 2A current rating and 200V voltage rating with a 2.00mm pitch configuration. The part is classified as obsolete, making identification of compatible substitute components essential for ongoing system support and procurement planning.

Key Parameters

Parameter	Value
Manufacturer	Hirose Electric Co Ltd
Category	Rectangular Connectors
Series	A4
Connector Type	Header
Contact Type	Male Pin
Number of Positions	3
Pitch - Mating	0.079" (2.00mm)
Mounting Type	Through Hole
Termination	Solder
Current Rating	2A
Voltage Rating	200V
Operating Temperature	-55°C ~ 85°C
Material Flammability Rating	UL94 V-0

Substitute Part Grouping Explanation

The A4B-3PA-2DSA(51) qualifies as a direct substitute based on the following critical parameters:

Same manufacturer (Hirose Electric Co Ltd) and base product number (A4B-3PA)
Identical connector type, contact type, and male pin configuration
Matching pitch specification of 0.079" (2.00mm)
Same number of positions (3) and through-hole mounting method
Identical contact geometry: square shape, 0.138" (4.60mm) mating length, 0.102" (2.60mm) post length
Matching insulation material (Polyamide/Nylon) and color (Black)
Equivalent operating temperature range (-55°C ~ 85°C)
Same flammability rating (UL94 V-0)
Identical solder termination and push-pull fastening type

The substitute part differs in product status (Active vs. Obsolete) and current rating specification (1A vs. 2A), with the substitute rated for lower current capacity.

Parameter Comparison

Parameter	A4B-3PA-2DSA(71) (Main)	A4B-3PA-2DSA(51) (Substitute)
Manufacturer	Hirose Electric Co Ltd	Hirose Electric Co Ltd
Series	A4	A4
Product Status	Obsolete	Active
Connector Type	Header	Header
Contact Type	Male Pin	Male Pin
Number of Positions	3	3
Pitch - Mating	0.079" (2.00mm)	0.079" (2.00mm)
Mounting Type	Through Hole	Through Hole
Termination	Solder	Solder
Contact Length - Mating	0.138" (4.60mm)	0.138" (4.60mm)
Contact Length - Post	0.102" (2.60mm)	0.102" (2.60mm)
Overall Contact Length	0.311" (7.90mm)	0.311" (7.90mm)
Insulation Height	0.071" (1.80mm)	0.071" (1.80mm)
Contact Shape	Square	Square
Contact Finish - Mating	Gold	Gold
Contact Material	Brass	Brass
Insulation Material	Polyamide (PA), Nylon	Polyamide (PA), Nylon
Insulation Color	Black	Black
Operating Temperature	-55°C ~ 85°C	-55°C ~ 85°C
Material Flammability Rating	UL94 V-0	UL94 V-0
Current Rating (Amps)	2A	1A
Voltage Rating	200V	200VAC
Fastening Type	Push-Pull	Push-Pull
Base Product Number	A4B-3PA	A4B-3PA
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)
ECCN	EAR99	EAR99
HTSUS	8536.69.4040	8536.69.4040

Engineering Selection Recommendations

The A4B-3PA-2DSA(51) is a functionally compatible substitute for the obsolete A4B-3PA-2DSA(71). Both components share identical mechanical and electrical specifications across all critical parameters including pitch, contact geometry, mounting method, and operating temperature range.

The primary consideration for component selection is the current rating differential. The main part is rated for 2A operation, while the substitute is rated for 1A. Applications requiring the full 2A capacity of the original part must evaluate whether the 1A rating of the substitute meets circuit requirements.

The substitute part carries Active product status from Hirose Electric Co Ltd, ensuring ongoing availability and manufacturing support. Both parts maintain equivalent compliance certifications (UL94 V-0, EAR99, HTSUS 8536.69.4040) and identical moisture sensitivity levels (MSL 1).

Frequently Asked Questions (FAQ)

Q: Can A4B-3PA-2DSA(51) directly replace A4B-3PA-2DSA(71) in existing designs?

A: Physical and electrical compatibility is confirmed across all mechanical dimensions, pitch specifications, contact configurations, and operating parameters. The substitute part is mechanically interchangeable. Current rating differences must be evaluated against circuit requirements.

Q: What is the significance of the current rating difference between these parts?

A: The main part A4B-3PA-2DSA(71) is rated for 2A continuous current, while the substitute A4B-3PA-2DSA(51) is rated for 1A. Applications operating at currents between 1A and 2A must assess whether the lower rating of the substitute is acceptable for the intended circuit.

Q: Why is the main part classified as obsolete?

A: Product status reflects Hirose Electric Co Ltd's manufacturing and support decisions. The substitute part maintains Active status, indicating current production and availability through authorized distributors.

Q: Are there packaging differences between these parts?

A: The main part packaging is listed as unspecified, while the substitute is supplied in Bulk packaging. This reflects standard distribution formats and does not affect component functionality or performance.

Q: Do both parts meet the same compliance and certification standards?

A: Both parts carry identical compliance designations: UL94 V-0 flammability rating, EAR99 export classification, and HTSUS code 8536.69.4040. The substitute part is RoHS Compliant, providing additional environmental compliance documentation.

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