Molex 0039310121 Rectangular Connector Header - Equivalent & Substitute Parts

Part Overview

The Molex 0039310121 is a shrouded rectangular connector header from the Mini-Fit Jr 5566 series, designed for through-hole mounting in board-to-cable/wire applications. This component features 12 positions arranged in 2 rows with 0.165" (4.20mm) pitch and solder termination. The part is currently obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and new design implementations.

Key Parameters

Parameter	Value
Connector Type	Header
Contact Type	Male Pin
Number of Positions	12
Number of Rows	2
Pitch - Mating	0.165" (4.20mm)
Row Spacing - Mating	0.165" (4.20mm)
Mounting Type	Through Hole
Shrouding	Shrouded - 4 Wall
Termination	Solder
Insulation Material	Polyamide (PA66), Nylon 6/6
Contact Material	Brass
Contact Finish - Mating	Tin
Contact Finish - Post	Tin
Insulation Height	0.504" (12.80mm)
Contact Length - Post	0.138" (4.60mm)
Contact Shape	Square
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the Molex 0039310121 is determined by strict alignment of the following critical parameters:

Connector type (Header)
Contact type (Male Pin)
Position count (12)
Row configuration (2 rows)
Mating pitch (0.165" / 4.20mm)
Row spacing (0.165" / 4.20mm)
Mounting method (Through Hole)
Shrouding configuration (Shrouded - 4 Wall)
Termination method (Solder)
Insulation material (Polyamide PA66 / Nylon 6/6)
Contact material (Brass)
Contact finish (Tin on both mating and post surfaces)

Two substitute parts meet these criteria: Molex 0469990569 (direct manufacturer alternative with active product status) and Adam Tech DMF-12-S (manufacturer-recommended equivalent from an alternative supplier).

Parameter Comparison

Parameter	Molex 0039310121	Molex 0469990569	Adam Tech DMF-12-S
Manufacturer	Molex	Molex	Adam Tech
Product Status	Obsolete	Active	Active
Connector Type	Header	Header	Header
Contact Type	Male Pin	Male Pin	Male Pin
Number of Positions	12	12	12
Number of Rows	2	2	2
Pitch - Mating	0.165" (4.20mm)	0.165" (4.20mm)	0.165" (4.20mm)
Row Spacing - Mating	0.165" (4.20mm)	0.165" (4.20mm)	0.165" (4.20mm)
Mounting Type	Through Hole	Through Hole	Through Hole
Shrouding	Shrouded - 4 Wall	Shrouded - 4 Wall	Shrouded - 4 Wall
Termination	Solder	Solder	Solder
Insulation Material	Polyamide (PA66), Nylon 6/6	Polyamide (PA66), Nylon 6/6	Polyamide (PA66), Nylon 6/6
Contact Material	Brass	Brass	Brass
Contact Finish - Mating	Tin	Tin	Tin
Contact Finish - Post	Tin	Tin	Tin
Insulation Height	0.504" (12.80mm)	0.504" (12.80mm)	0.504" (12.80mm)
Contact Length - Post	0.138" (4.60mm)	0.138" (4.60mm)	0.134" (3.40mm)
Contact Shape	Square	Square	Square
Material Flammability Rating	UL94 V-2	UL94 V-0	UL94 V-2
Insulation Color	Natural	Black	Natural
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Operating Temperature	Not specified	Not specified	-25°C ~ 85°C
Current Rating	Not specified	Not specified	7A
Voltage Rating	Not specified	Not specified	250VAC

Engineering Selection Recommendations

For applications currently using the obsolete Molex 0039310121, the Molex 0469990569 is the primary substitute. Both parts are from the same manufacturer and Mini-Fit Jr 5566 series, ensuring design continuity. The 0469990569 maintains active product status and ROHS3 compliance, with identical mechanical and electrical interface specifications. The material flammability rating improvement to UL94 V-0 and black insulation color represent enhancements over the original design.

The Adam Tech DMF-12-S serves as an alternative cross-manufacturer substitute when Molex components are unavailable. This part maintains all critical interface parameters and ROHS3 compliance. The contact length post dimension differs by 0.004" (0.10mm), which remains within typical connector tolerance ranges for board-to-cable applications. The DMF-12-S provides specified operating temperature (-25°C ~ 85°C), current rating (7A), and voltage rating (250VAC) parameters, offering additional electrical performance documentation.

Frequently Asked Questions (FAQ)

Q: Can the Molex 0469990569 be used as a direct replacement for the obsolete 0039310121?

A: Yes. Both parts share identical connector type, position count, pitch, row spacing, mounting method, shrouding, termination, and insulation specifications. The 0469990569 is the active production equivalent from Molex.

Q: What is the significance of the contact length post difference between the Molex 0039310121 and Adam Tech DMF-12-S?

A: The Molex part specifies 0.138" (4.60mm) post length while the Adam Tech part specifies 0.134" (3.40mm). This 0.004" (0.10mm) difference falls within standard connector manufacturing tolerances and does not affect board-to-cable interface compatibility.

Q: Are there packaging differences between the substitute parts?

A: The Molex 0039310121 packaging is not specified. The Molex 0469990569 is supplied in Tray packaging. The Adam Tech DMF-12-S is also supplied in Tray packaging. Verify packaging requirements for your procurement and assembly processes.

Q: Do all three parts meet RoHS compliance requirements?

A: Yes. The Molex 0039310121, Molex 0469990569, and Adam Tech DMF-12-S are all ROHS3 compliant.

Q: What is the moisture sensitivity level for these connectors?

A: All three parts carry Moisture Sensitivity Level 1 (Unlimited), indicating no special moisture control measures are required during storage or handling.

Q: Can the Adam Tech DMF-12-S be used in high-temperature applications?

A: The Adam Tech DMF-12-S specifies an operating temperature range of -25°C ~ 85°C. Operating temperature specifications are not provided for the Molex parts. Verify your application temperature requirements against the DMF-12-S specification.

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