TE Connectivity AMP Connectors 644633-3 Equivalent & Substitute Parts

Part Overview

The TE Connectivity AMP Connectors 644633-3 is a rectangular connector header, right-angle configuration, with 3 positions at 0.156" (3.96mm) pitch. This connector is designed for through-hole mounting with solder termination in board-to-cable/wire applications. The part is classified as obsolete, necessitating identification of active equivalent and substitute components that maintain functional compatibility for ongoing production and repair applications.

Key Parameters

Parameter	Value
Connector Type	Header
Contact Type	Male Pin
Pitch - Mating	0.156" (3.96mm)
Number of Positions	3
Number of Rows	1
Mounting Type	Through Hole, Right Angle
Termination	Solder
Shrouding	Shrouded - 1 Wall
Contact Length - Mating	0.450" (11.43mm)
Contact Shape	Square
Material Flammability Rating	UL94 V-0
Operating Temperature	-55°C ~ 105°C
Voltage Rating	600VAC

Substitute Part Grouping Explanation

Substitution eligibility for the TE Connectivity 644633-3 is determined by the following critical parameters:

Primary Compatibility Criteria:

Pitch - Mating: 0.156" (3.96mm)
Number of Positions: 3
Connector Type: Header
Contact Type: Male Pin
Mounting Type: Through Hole, Right Angle
Termination: Solder
Shrouding: Shrouded - 1 Wall
Contact Length - Mating: 0.450" (11.43mm)
Contact Shape: Square
Material Flammability Rating: UL94 V-0

Substitute Categories:

Direct Equivalent: Part 3-644633-3 is a direct TE Connectivity equivalent with identical electrical and mechanical specifications. This part maintains the same series designation (MTA-156) and differs only in product status (Active vs. Obsolete) and RoHS compliance status.

Cross-Manufacturer Substitutes: Molex parts 0417920512, 0417920529, 0026605030, and 0026625031 provide functional equivalence within the KK396/41792 series. These parts maintain the critical mating pitch, position count, mounting configuration, and contact geometry. Variations exist in contact post length, insulation height, and contact finish specifications, which do not affect primary mating interface compatibility.

Parameter Comparison

Parameter	644633-3 (Main)	3-644633-3	0417920512	0417920529	0026605030	0026625031
Manufacturer	TE Connectivity	TE Connectivity	Molex	Molex	Molex	Molex
Series	MTA-156	MTA-156	KK396, 41792	KK396, 41792	KK396, 41792	KK396, 41792
Product Status	Obsolete	Active	Active	Active	Active	Active
Connector Type	Header	Header	Header	Header	Header	Header
Contact Type	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin
Pitch - Mating	0.156" (3.96mm)	0.156" (3.96mm)	0.156" (3.96mm)	0.156" (3.96mm)	0.156" (3.96mm)	0.156" (3.96mm)
Number of Positions	3	3	3	3	3	3
Number of Rows	1	1	1	1	1	1
Mounting Type	Through Hole, Right Angle	Through Hole, Right Angle	Through Hole, Right Angle	Through Hole, Right Angle	Through Hole, Right Angle	Through Hole, Right Angle
Termination	Solder	Solder	Solder	Solder	Solder	Solder
Shrouding	Shrouded - 1 Wall	Shrouded - 1 Wall	Shrouded - 1 Wall	Shrouded - 1 Wall	Shrouded - 1 Wall	Shrouded - 1 Wall
Contact Length - Mating	0.450" (11.43mm)	0.450" (11.43mm)	0.450" (11.43mm)	0.450" (11.43mm)	0.450" (11.43mm)	0.450" (11.43mm)
Contact Length - Post	0.125" (3.18mm)	0.125" (3.18mm)	0.156" (3.96mm)	0.156" (3.96mm)	0.156" (3.96mm)	0.156" (3.96mm)
Insulation Height	0.300" (7.62mm)	0.300" (7.62mm)	0.394" (10.00mm)	0.394" (10.00mm)	0.394" (10.00mm)	0.394" (10.00mm)
Contact Shape	Square	Square	Square	Square	Square	Square
Contact Finish - Mating	Gold	Gold	Gold	Gold	Tin	Tin
Contact Finish - Post	Tin-Lead	Tin	Tin	Tin	Tin	Tin
Material Flammability Rating	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0
Operating Temperature	-55°C ~ 105°C	-55°C ~ 105°C	Not specified	Not specified	Not specified	Not specified
Voltage Rating	600VAC	600VAC	Not specified	Not specified	Not specified	Not specified
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Number of Positions Loaded	All	All	All	All	All	2

Engineering Selection Recommendations

Primary Recommendation: TE Connectivity 3-644633-3

The 3-644633-3 is the preferred substitute for the obsolete 644633-3. This part is manufactured by the same supplier (TE Connectivity) within the same MTA-156 series and maintains identical electrical and mechanical specifications. The primary advantage is Active product status, ensuring continued availability and supply chain reliability. The part achieves ROHS3 compliance, meeting current regulatory requirements. The only material difference is the contact finish on the post (Tin vs. Tin-Lead), which does not affect mating interface performance.

Secondary Recommendations: Molex Cross-Manufacturer Substitutes

Molex parts 0417920512 and 0417920529 provide functional equivalence with the following considerations:

Both parts maintain the critical mating interface specifications: 0.156" (3.96mm) pitch, 3 positions, square contact geometry, and 0.450" (11.43mm) mating contact length
Contact post length is 0.156" (3.96mm) versus 0.125" (3.18mm) on the original part, resulting in increased insulation height (0.394" vs. 0.300")
Both parts achieve ROHS3 compliance and UL94 V-0 flammability rating
0417920512 features gold mating contact finish with 15.0µin thickness
0417920529 features gold mating contact finish with 30.0µin thickness, matching the original part specification
Both parts are Active status with established supply availability

Molex parts 0026605030 and 0026625031 are functionally equivalent with the following distinctions:

0026605030 has all 3 positions loaded; 0026625031 has 2 positions loaded
Both feature tin mating contact finish rather than gold
Both maintain identical mating pitch, position count, and contact geometry
Both achieve ROHS3 compliance and UL94 V-0 rating
Both are Active status with high inventory availability

Compliance Considerations:

All substitute parts achieve ROHS3 compliance, addressing regulatory requirements that the original obsolete part does not meet. The original part contains Tin-Lead finish on the post, which is restricted under RoHS regulations. All substitutes employ Tin or Gold finishes compliant with current environmental standards.

Frequently Asked Questions (FAQ)

Q: Can the 3-644633-3 be used as a direct replacement for the 644633-3?

A: Yes. The 3-644633-3 is a direct equivalent with identical connector specifications, pitch, position count, mounting configuration, and mating contact dimensions. The part is manufactured by TE Connectivity within the same MTA-156 series. The primary differences are product status (Active vs. Obsolete) and RoHS compliance status.

Q: What are the key differences between TE Connectivity and Molex substitutes?

A: TE Connectivity 3-644633-3 maintains the same series designation and supplier relationship. Molex parts belong to the KK396/41792 series and introduce variations in contact post length (0.156" vs. 0.125"), resulting in increased insulation height (0.394" vs. 0.300"). The mating interface specifications remain identical across all substitutes. Molex parts offer higher inventory availability.

Q: Are there differences in contact finish between substitute options?

A: Yes. The original 644633-3 features gold mating contact finish. The 3-644633-3 maintains this specification. Molex 0417920512 and 0417920529 both feature gold mating finishes with different thickness specifications (15.0µin and 30.0µin respectively). Molex 0026605030 and 0026625031 feature tin mating contact finish. All parts maintain tin post finish. Contact finish differences do not affect mating interface compatibility.

Q: What is the significance of the "Number of Positions Loaded" parameter?

A: This parameter indicates how many contact positions are pre-installed in the connector housing. The original 644633-3 and most substitutes have all 3 positions loaded. Molex 0026625031 has only 2 positions loaded, making it suitable for applications requiring fewer contact points. This distinction affects application compatibility based on circuit requirements.

Q: Do the Molex substitutes have the same operating temperature and voltage ratings?

A: The original TE Connectivity 644633-3 specifies -55°C to 105°C operating temperature and 600VAC voltage rating. Molex substitute parts do not provide these specifications in their technical data. When operating temperature and voltage ratings are critical to the application, the TE Connectivity 3-644633-3 is the recommended choice, as it maintains the original specifications.

Q: Are all substitute parts RoHS compliant?

A: Yes. All substitute parts listed (3-644633-3, 0417920512, 0417920529, 0026605030, and 0026625031) achieve ROHS3 compliance. The original 644633-3 is RoHS non-compliant due to its Tin-Lead post finish. Substitution addresses regulatory compliance requirements for new production and repair applications.

Q: What is the difference between 0026605030 and 0026625031?

A: Both are Molex KK396/41792 series connectors with identical mating specifications. The primary difference is the number of positions loaded: 0026605030 has all 3 positions loaded, while 0026625031 has 2 positions loaded. Selection depends on the specific circuit configuration and number of required contact points.

Q: Can I use a substitute part with different contact post length in my existing PCB design?

A: The contact post length difference (0.156" for Molex vs. 0.125" for TE Connectivity) results in increased insulation height on Molex parts (0.394" vs. 0.300"). This affects the vertical profile of the connector on the PCB. If PCB layout includes height constraints or mechanical clearance limitations, the TE Connectivity 3-644633-3 is the appropriate choice to maintain the original form factor.

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