A3A-4DA-2SV(71) Equivalent & Substitute Parts

Part Overview

The A3A-4DA-2SV(71) is a 4-position receptacle connector manufactured by Hirose Electric Co Ltd, designed for board-to-board or cable applications with surface mount termination. This connector features a 0.079" (2.00mm) pitch, gold-plated mating contacts, and push-pull fastening. The part is currently active in production with 1082 units in stock. Substitute parts are identified when equivalent electrical and mechanical parameters align with the original specification, enabling component interchangeability in applications where the primary part becomes unavailable or when packaging requirements differ.

Key Parameters

Parameter	Value
Connector Type	Receptacle
Contact Type	Female Socket
Number of Positions	4
Pitch - Mating	0.079" (2.00mm)
Number of Rows	2
Row Spacing - Mating	0.079" (2.00mm)
Mounting Type	Surface Mount
Termination	Solder
Fastening Type	Push-Pull
Contact Finish - Mating	Gold
Voltage Rating	200VAC
Current Rating	1A
Operating Temperature	-55°C ~ 85°C
Material Flammability Rating	UL94 V-0
RoHS Status	RoHS Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the A3A-4DA-2SV(71) is determined by strict alignment of the following critical parameters:

Mandatory Matching Parameters:

Connector type: Receptacle
Contact type: Female socket
Number of positions: 4
Pitch - mating: 0.079" (2.00mm)
Number of rows: 2
Row spacing - mating: 0.079" (2.00mm)
Mounting type: Surface mount
Termination: Solder
Fastening type: Push-pull
Contact finish - mating: Gold
Voltage rating: 200V or higher
Material flammability rating: UL94 V-0
RoHS compliance: Yes

The identified substitute parts 55510-104LF and 55510-104TRLF (both Amphenol ICC/FCI Minitek® 2.00mm series) meet all mandatory electrical and mechanical parameters. These parts differ only in packaging format (tube versus tape & reel) and minor variations in non-critical specifications such as insulation color and contact finish thickness on posts.

Parameter Comparison

Parameter	A3A-4DA-2SV(71)	55510-104LF	55510-104TRLF
Manufacturer	Hirose Electric Co Ltd	Amphenol ICC (FCI)	Amphenol ICC (FCI)
Series	A3	Minitek® 2.00mm	Minitek® 2.00mm
Connector Type	Receptacle	Receptacle	Receptacle
Contact Type	Female Socket	Female Socket	Female Socket
Number of Positions	4	4	4
Pitch - Mating	0.079" (2.00mm)	0.079" (2.00mm)	0.079" (2.00mm)
Number of Rows	2	2	2
Row Spacing - Mating	0.079" (2.00mm)	0.079" (2.00mm)	0.079" (2.00mm)
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Termination	Solder	Solder	Solder
Fastening Type	Push-Pull	Push-Pull	Push-Pull
Contact Finish - Mating	Gold	Gold	Gold
Voltage Rating	200VAC	200V	200V
Current Rating	1A	2A	2A
Operating Temperature	-55°C ~ 85°C	-55°C ~ 125°C	-55°C ~ 125°C
Material Flammability Rating	UL94 V-0	UL94 V-0	UL94 V-0
RoHS Status	RoHS Compliant	RoHS Compliant	RoHS Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Packaging	Tube	Tube	Tape & Reel (TR)
Product Status	Active	Active	Active

Engineering Selection Recommendations

Both 55510-104LF and 55510-104TRLF are active production parts from Amphenol ICC (FCI) and meet all electrical and mechanical requirements for direct substitution with the A3A-4DA-2SV(71). All three parts carry RoHS compliance and UL94 V-0 flammability ratings, confirming regulatory alignment.

The substitute parts demonstrate enhanced performance characteristics: operating temperature range extends to 125°C (versus 85°C for the original), and current rating is rated at 2A (versus 1A for the original). These improvements provide additional design margin in applications operating within the original specification envelope.

Selection between 55510-104LF and 55510-104TRLF depends solely on packaging requirements. The 55510-104LF is supplied in tube packaging, matching the original A3A-4DA-2SV(71) format. The 55510-104TRLF is supplied in tape & reel format with pick-and-place features, suitable for high-volume automated assembly processes.

Frequently Asked Questions (FAQ)

Q: Can 55510-104LF and 55510-104TRLF be used interchangeably with A3A-4DA-2SV(71)?

A: Yes. Both parts meet all mandatory electrical and mechanical parameters: 4-position receptacle, 0.079" (2.00mm) pitch, 2-row configuration, surface mount solder termination, push-pull fastening, gold-plated mating contacts, 200V rating, and UL94 V-0 flammability. The substitute parts exceed the original specification in current rating (2A versus 1A) and operating temperature range (-55°C to 125°C versus -55°C to 85°C).

Q: What is the difference between 55510-104LF and 55510-104TRLF?

A: Both parts are electrically and mechanically identical. The primary difference is packaging: 55510-104LF is supplied in tube format, while 55510-104TRLF is supplied in tape & reel format with pick-and-place capability. Selection depends on assembly process requirements and volume considerations.

Q: Are there any compatibility concerns when substituting these parts?

A: No compatibility concerns exist for applications within the original A3A-4DA-2SV(71) specification. The substitute parts maintain identical mating interface geometry, contact configuration, and fastening mechanism. PCB footprint and connector mating interface are fully compatible.

Q: Do the substitute parts carry the same certifications?

A: Yes. All three parts are RoHS compliant, carry UL94 V-0 flammability ratings, and are rated for 200V operation. Moisture sensitivity level is 1 (Unlimited) for all parts, indicating no special handling requirements.

Q: Why do the substitute parts have higher current and temperature ratings?

A: The Amphenol ICC Minitek® 2.00mm series (55510-104LF and 55510-104TRLF) are designed with enhanced contact materials and geometry that support higher current density and wider operating temperature ranges. These improvements do not affect compatibility; they provide additional performance margin for applications operating within the original specification.

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