Molex 0873811273 Equivalent & Substitute Parts

Part Overview

The Molex 0873811273 is a 12-position receptacle connector from the Milli-Grid 87381 series, designed for surface mount board-to-board applications. This connector features 0.079" (2.00mm) pitch, gold-plated mating contacts, and push-pull fastening. The part is active in production with 781 units in stock. Equivalent and substitute parts are identified for applications requiring alternative sourcing, packaging formats, or enhanced electrical performance specifications.

Key Parameters

Parameter	Value
Connector Type	Receptacle
Number of Positions	12
Pitch - Mating	0.079" (2.00mm)
Number of Rows	2
Row Spacing - Mating	0.079" (2.00mm)
Mounting Type	Surface Mount
Fastening Type	Push-Pull
Contact Finish - Mating	Gold
Termination	Solder
Operating Temperature Range	-55°C ~ 105°C
Current Rating	1.9A
Voltage Rating	125V
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict alignment with the following critical parameters: connector type (receptacle), number of positions (12), mating pitch (0.079"/2.00mm), row configuration (2 rows with 0.079" spacing), mounting type (surface mount), fastening mechanism (push-pull), contact finish (gold), and termination method (solder). All identified substitutes meet these core mechanical and electrical compatibility requirements. Variations in contact material, insulation composition, current rating, voltage rating, and operating temperature range are documented but do not preclude functional substitution within their respective electrical specifications.

Parameter Comparison

Parameter	Molex 0873811273	Hirose A3-12DA-2SV(71)	Hirose A3A-12DA-2SV(71)	Samtec SMM-106-02-S-D-K	Samtec SMM-106-02-S-D-K-TR	Samtec SMM-106-02-S-D-LC	Samtec SMM-106-02-S-D-P-TR
Manufacturer	Molex	Hirose Electric Co Ltd	Hirose Electric Co Ltd	Samtec Inc.	Samtec Inc.	Samtec Inc.	Samtec Inc.
Series	Milli-Grid 87381	A3	A3	Tiger Eye™ SMM	Tiger Eye™ SMM	Tiger Eye™ SMM	Tiger Eye™ SMM
Number of Positions	12	12	12	12	12	12	12
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 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
Fastening Type	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Push-Pull
Contact Finish - Mating	Gold	Gold	Gold	Gold	Gold	Gold	Gold
Termination	Solder	Solder	Solder	Solder	Solder	Solder	Solder
Operating Temperature Range	-55°C ~ 105°C	-55°C ~ 85°C	-55°C ~ 85°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C
Current Rating	1.9A	1A	1A	3.2A per Contact	3.2A per Contact	3.2A per Contact	3.2A per Contact
Voltage Rating	125V	200VAC	200VAC	350VAC	350VAC	350VAC	350VAC
Insulation Color	Black	Brown	Brown	Black	Black	Black	Black
Insulation Height	0.177" (4.50mm)	0.165" (4.20mm)	0.165" (4.20mm)	0.140" (4.66mm)	0.140" (4.66mm)	0.140" (4.66mm)	0.140" (4.66mm)
Packaging	Tube	Tube	Tube	Tube	Cut Tape (CT) & Digi-Reel®	Tube	Tape & Reel (TR)
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Active	Active	Active	Active	Active	Active	Active

Engineering Selection Recommendations

All identified substitute parts maintain active production status and ROHS3 compliance, ensuring long-term availability and regulatory alignment with the original Molex 0873811273.

Hirose A3-12DA-2SV(71) and A3A-12DA-2SV(71) provide direct mechanical compatibility with reduced operating temperature range (-55°C to 85°C versus -55°C to 105°C) and lower current rating (1A versus 1.9A). The A3A variant includes board guide features. These substitutes are suitable for general purpose and telecommunications applications where the reduced electrical specifications are acceptable.

Samtec Tiger Eye™ SMM series (SMM-106-02-S-D-K, SMM-106-02-S-D-K-TR, SMM-106-02-S-D-LC, SMM-106-02-S-D-P-TR) offer enhanced electrical performance with extended operating temperature range (-55°C to 125°C), higher current rating (3.2A per contact), and higher voltage rating (350VAC). These parts are mechanically compatible but feature reduced insulation height (0.140" versus 0.177"). Packaging variants include tube, cut tape with digi-reel, and tape & reel formats to accommodate different assembly processes. The SMM-106-02-S-D-LC variant includes board lock features; SMM-106-02-S-D-P-TR and SMM-106-02-S-D-K include pick and place features.

Frequently Asked Questions (FAQ)

Q: Can Hirose A3-12DA-2SV(71) be used as a direct replacement for Molex 0873811273?

A: Mechanical compatibility is confirmed. The reduced operating temperature range (-55°C to 85°C) and lower current rating (1A) must be evaluated against application requirements. If the application operates within these electrical limits, substitution is valid.

Q: What is the primary difference between Samtec SMM-106-02-S-D-K and SMM-106-02-S-D-LC?

A: Both parts are mechanically and electrically identical. SMM-106-02-S-D-LC includes board lock features, while SMM-106-02-S-D-K does not. Selection depends on mechanical retention requirements.

Q: Why do Samtec parts have higher current and voltage ratings than the Molex original?

A: Samtec Tiger Eye™ SMM series uses beryllium copper contacts and liquid crystal polymer insulation, enabling higher electrical performance specifications. These enhanced ratings do not affect mechanical compatibility and provide design margin for applications with higher electrical demands.

Q: What packaging options are available for high-volume assembly?

A: Samtec SMM-106-02-S-D-K-TR is supplied in cut tape with digi-reel format, and SMM-106-02-S-D-P-TR is supplied in tape & reel format. Both support automated pick-and-place assembly. Hirose and standard Samtec tube packaging are available for lower-volume applications.

Q: Are all substitutes RoHS3 compliant?

A: Yes. All identified substitutes maintain ROHS3 compliance, matching the regulatory status of the original Molex 0873811273.

Q: What is the impact of reduced insulation height in Samtec parts?

A: Samtec Tiger Eye™ SMM series has 0.140" insulation height versus 0.177" for the Molex original. This reduction does not affect electrical performance or mating compatibility but may impact board layout spacing in applications with tight vertical constraints.

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