Equivalent & Substitute Parts for A4B-3PA-2DSA

Part Overview

The A4B-3PA-2DSA is a rectangular connector header manufactured by Hirose Electric Co Ltd, designed for through-hole mounting applications requiring a 3-position, 2mm pitch vertical header with male pin contacts. This connector is classified as obsolete, making identification of active equivalent parts essential for ongoing design support and procurement continuity. The part operates across a temperature range of -55°C to 85°C and is rated for 2A current at 200V, with gold-plated mating contacts and UL94 V-0 flammability compliance.

Substiute Parts

A4B-3PA-2DSA

Hirose Electric Co LtdIn Stock: 1049A4B-3PA-2DSA Datasheet

Current PartRFQ

M22-2510305

Harwin Inc.In Stock: 20892M22-2510305 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the A4B-3PA-2DSA is determined by the following critical parameters that must remain consistent:

• Pitch - Mating: 0.079" (2.00mm)
• Number of Positions: 3
• Number of Rows: 1
• Connector Type: Header with male pin contacts
• Mounting Type: Through Hole
• Termination: Solder
• Contact Finish: Gold-plated mating surface
• Insulation Material: Polyamide/Nylon-based

The M22-2510305 from Harwin Inc. satisfies these core substitution criteria. Both connectors maintain identical pitch spacing, position count, and through-hole solder termination architecture. Both feature gold-plated mating contacts and polyamide-based insulation materials, ensuring mechanical and electrical compatibility at the board interface level.

Parameter Comparison

Engineering Selection Recommendations

The M22-2510305 serves as the active equivalent for the obsolete A4B-3PA-2DSA. Both connectors share identical mating pitch, position configuration, and through-hole solder termination, establishing direct mechanical and electrical compatibility.

Key considerations for selection:

The M22-2510305 is ROHS3 compliant, whereas the A4B-3PA-2DSA is RoHS non-compliant. For applications subject to RoHS regulatory requirements, the Harwin part provides compliance advantage.

The M22-2510305 operates across an extended temperature range of -40°C to 105°C compared to the Hirose part's -55°C to 85°C range, providing broader thermal operating envelope.

The current rating differs: the A4B-3PA-2DSA is rated at 2A, while the M22-2510305 is rated at 1A per contact. Applications requiring the full 2A capacity must evaluate whether the reduced current rating of the substitute is acceptable for the intended circuit design.

The contact post length of the M22-2510305 is 0.091" (2.30mm) versus 0.102" (2.60mm) for the original part, and insulation height is 0.059" (1.50mm) versus 0.071" (1.80mm). These dimensional differences are minor and do not affect standard PCB mounting compatibility.

The M22-2510305 features a cuttable header design, offering additional flexibility for custom pin configurations if required.

Frequently Asked Questions (FAQ)

Q: Can the M22-2510305 directly replace the A4B-3PA-2DSA on existing PCBs?

A: Yes. Both connectors maintain identical 2.00mm pitch spacing and 3-position configuration. The through-hole solder termination footprint is compatible. Minor dimensional variations in contact post length and insulation height do not affect standard PCB mounting.

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

A: The A4B-3PA-2DSA is rated at 2A, while the M22-2510305 is rated at 1A per contact. For applications operating at or near 2A, the substitute part's reduced rating must be evaluated against actual circuit current requirements. If the application requires sustained 2A operation, the lower rating of the substitute may be a limiting factor.

Q: Does the cuttable header feature of the M22-2510305 affect compatibility?

A: No. The cuttable design is an additional feature that does not impact standard 3-position operation. The connector functions identically to a non-cuttable header when used in its standard configuration.

Q: Are there packaging differences between these parts?

A: The A4B-3PA-2DSA is listed with unspecified packaging, while the M22-2510305 is supplied in bulk packaging. Verify packaging requirements for your procurement and assembly processes.

Q: What is the impact of the extended operating temperature range of the M22-2510305?

A: The M22-2510305 operates from -40°C to 105°C, compared to -55°C to 85°C for the original part. For applications requiring operation below -40°C or above 105°C, the original specification must be maintained or alternative parts evaluated.

Q: How do the contact materials differ, and does this affect performance?

A: The A4B-3PA-2DSA uses brass contacts, while the M22-2510305 uses phosphor bronze. Both materials are standard for connector applications and provide equivalent electrical conductivity and reliability when gold-plated. The phosphor bronze in the substitute offers slightly enhanced spring characteristics.