TE Connectivity 2-644456-6 Equivalent & Substitute Parts

Part Overview

The TE Connectivity 2-644456-6 is a rectangular connector header manufactured for through-hole mounting applications. This connector is a vertical 26-position header with 0.100" (2.54mm) pitch spacing, designed for board-to-cable and board-to-board interconnections. The part operates within the MTA-100 series and features male pin contacts with tin-lead plating on both mating and post surfaces.

The 2-644456-6 carries an obsolete product status. Equivalent and substitute parts are available from active product lines that maintain functional compatibility while offering enhanced specifications, improved compliance certifications, and continued manufacturing support.

Key Parameters

Parameter	Value
Connector Type	Header
Contact Type	Male Pin
Number of Positions	26
Pitch - Mating	0.100" (2.54mm)
Number of Rows	1
Mounting Type	Through Hole
Termination	Solder
Shrouding	Unshrouded
Contact Shape	Square
Insulation Material	Thermoplastic
Operating Temperature Range	-55°C ~ 105°C
Material Flammability Rating	UL94 V-0
Voltage Rating	250VAC

Substitute Part Grouping Explanation

Substitution eligibility for the TE Connectivity 2-644456-6 is determined by the following critical parameters:

Primary Compatibility Criteria:

26-position connector header configuration
0.100" (2.54mm) mating pitch
Single-row, unshrouded design
Through-hole solder termination
Square contact geometry
Male pin contact type
UL94 V-0 flammability rating

Secondary Compatibility Considerations:

Contact length variations (mating and post dimensions)
Contact finish composition (tin-lead, tin, or gold plating)
Insulation material type (thermoplastic or polyamide)
Operating temperature range extensions
RoHS and REACH compliance status
Current rating per contact

Substitute parts from Molex (KK254 series), Amphenol ICC (BERGSTIK® series), and other manufacturers meet the primary compatibility criteria while offering variations in contact finish, material composition, and regulatory compliance. These variations allow selection based on specific application requirements, environmental conditions, and compliance mandates.

Parameter Comparison

Parameter	2-644456-6 (TE)	0022284263 (Molex)	77311-122-26LF (Amphenol)	77311-124-26LF (Amphenol)	77311-127-26LF (Amphenol)	77311-422-26LF (Amphenol)	77311-424-26LF (Amphenol)	77311-427-26LF (Amphenol)	77311-822-26LF (Amphenol)	77311-824-26LF (Amphenol)	77311-827-26LF (Amphenol)
Connector Type	Header	Header, Breakaway	Header	Header	Header	Header	Header	Header	Header	Header	Header
Number of Positions	26	26	26	26	26	26	26	26	26	26	26
Pitch - Mating	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)
Number of Rows	1	1	1	1	1	1	1	1	1	1	1
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Termination	Solder	Solder	Solder	Solder	Solder	Solder	Solder	Solder	Solder	Solder	Solder
Shrouding	Unshrouded	Unshrouded	Unshrouded	Unshrouded	Unshrouded	Unshrouded	Unshrouded	Unshrouded	Unshrouded	Unshrouded	Unshrouded
Contact Shape	Square	Square	Square	Square	Square	Square	Square	Square	Square	Square	Square
Contact Type	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin
Material Flammability Rating	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0
Operating Temperature Range	-55°C ~ 105°C	Not Specified	-65°C ~ 125°C	-65°C ~ 125°C	-65°C ~ 125°C	-65°C ~ 125°C	-65°C ~ 125°C	-65°C ~ 125°C	-65°C ~ 125°C	-65°C ~ 125°C	-65°C ~ 125°C
Contact Length - Mating	0.295" (7.49mm)	0.240" (6.10mm)	0.305" (7.75mm)	0.266" (6.75mm)	0.260" (6.60mm)	0.305" (7.75mm)	0.266" (6.75mm)	0.260" (6.60mm)	0.305" (7.75mm)	0.266" (6.75mm)	0.260" (6.60mm)
Contact Length - Post	0.110" (2.79mm)	0.125" (3.18mm)	0.120" (3.05mm)	0.114" (2.90mm)	0.105" (2.67mm)	0.120" (3.05mm)	0.114" (2.90mm)	0.105" (2.67mm)	0.120" (3.05mm)	0.114" (2.90mm)	0.105" (2.67mm)
Overall Contact Length	0.505" (12.83mm)	0.455" (11.56mm)	0.525" (13.34mm)	0.480" (12.19mm)	0.465" (11.81mm)	0.525" (13.34mm)	0.480" (12.19mm)	0.465" (11.81mm)	0.525" (13.34mm)	0.480" (12.19mm)	0.465" (11.81mm)
Insulation Height	0.100" (2.54mm)	0.090" (2.29mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)
Contact Finish - Mating	Tin-Lead	Gold	Gold or Gold, GXT™	Gold or Gold, GXT™	Gold or Gold, GXT™	Tin	Tin	Tin	Gold or Gold, GXT™	Gold or Gold, GXT™	Gold or Gold, GXT™
Contact Finish Thickness - Mating	150.0µin (3.81µm)	15.0µin (0.38µm)	30.0µin (0.76µm)	30.0µin (0.76µm)	30.0µin (0.76µm)	78.7µin (2.00µm)	78.7µin (2.00µm)	78.7µin (2.00µm)	15.0µin (0.38µm)	15.0µin (0.38µm)	15.0µin (0.38µm)
Contact Finish - Post	Tin-Lead	Tin	Tin	Tin	Tin	Tin	Tin	Tin	Tin	Tin	Tin
Contact Finish Thickness - Post	150.0µin (3.81µm)	100.0µin (2.54µm)	78.7µin (2.00µm)	78.7µin (2.00µm)	78.7µin (2.00µm)	78.7µin (2.00µm)	78.7µin (2.00µm)	78.7µin (2.00µm)	78.7µin (2.00µm)	78.7µin (2.00µm)	78.7µin (2.00µm)
Insulation Material	Thermoplastic	Polyamide (PA), Nylon, Glass Filled	Thermoplastic	Thermoplastic	Thermoplastic	Thermoplastic	Thermoplastic	Thermoplastic	Thermoplastic	Thermoplastic	Thermoplastic
Product Status	Obsolete	Active	Active	Active	Active	Active	Active	Active	Active	Active	Active
RoHS Status	RoHS non-compliant	ROHS3 Compliant	RoHS Compliant	RoHS Compliant	RoHS Compliant	RoHS Compliant	RoHS Compliant	RoHS Compliant	RoHS Compliant	RoHS Compliant	RoHS Compliant

Engineering Selection Recommendations

Active Product Alternatives:

All substitute parts listed carry active product status, ensuring continued manufacturing support, availability, and technical documentation. The 2-644456-6 is obsolete and no longer manufactured by TE Connectivity.

Compliance Considerations:

The Molex 0022284263 and all Amphenol ICC BERGSTIK® series parts (77311-122-26LF through 77311-827-26LF) are RoHS compliant, addressing regulatory requirements for new designs and applications subject to RoHS directives. The original 2-644456-6 is RoHS non-compliant.

Temperature Range Extension:

Amphenol ICC BERGSTIK® series substitutes operate across -65°C to 125°C, extending the lower temperature limit by 10°C and the upper limit by 20°C compared to the original part's -55°C to 105°C range. This extended range accommodates applications in more demanding thermal environments.

Contact Finish Variations:

Substitute parts offer three contact finish options for mating surfaces: tin-lead (original specification), tin (77311-422-26LF, 77311-424-26LF, 77311-427-26LF), and gold or gold GXT™ (remaining Amphenol parts and Molex 0022284263). Gold-plated contacts provide enhanced corrosion resistance and lower contact resistance compared to tin-lead finishes.

Current Rating:

Amphenol ICC BERGSTIK® series parts specify 3A per contact, providing defined current handling capacity. The original part specifies current rating as varying by wire gauge without explicit per-contact specification.

Contact Length Variations:

Substitute parts are available in three mating contact length configurations: 0.240" (Molex), 0.260" to 0.305" (Amphenol variants). Selection depends on mating receptacle depth requirements and application-specific mechanical constraints.

Fastening Type:

Amphenol ICC BERGSTIK® series and Molex 0022284263 incorporate push-pull fastening mechanisms, providing positive mechanical retention compared to the original unshrouded design.

Frequently Asked Questions (FAQ)

Q: Can the Molex 0022284263 directly replace the TE Connectivity 2-644456-6?

A: The Molex 0022284263 meets all primary compatibility criteria: 26-position configuration, 0.100" (2.54mm) pitch, through-hole solder termination, and unshrouded design. However, the insulation height differs (0.090" versus 0.100"), and the contact finish is gold rather than tin-lead. Mechanical fit and electrical performance are compatible for standard applications. Verify mating receptacle compatibility before implementation.

Q: What is the difference between the Amphenol ICC BERGSTIK® variants?

A: The BERGSTIK® series variants differ in contact finish composition and thickness. Parts designated with "4" in the part number (77311-422-26LF, 77311-424-26LF, 77311-427-26LF) feature tin mating contact finish. Parts designated with "8" (77311-822-26LF, 77311-824-26LF, 77311-827-26LF) feature gold or gold GXT™ mating contact finish. The numeric suffix (122, 124, 127, 422, 424, 427, 822, 824, 827) indicates specific contact length combinations. All variants maintain identical pitch, position count, and mounting characteristics.

Q: Are all substitute parts RoHS compliant?

A: Yes. The Molex 0022284263 is ROHS3 compliant. All Amphenol ICC BERGSTIK® series parts (77311-122-26LF through 77311-827-26LF) are RoHS compliant. The original TE Connectivity 2-644456-6 is RoHS non-compliant. For applications requiring RoHS compliance, any listed substitute part is suitable.

Q: What is the significance of contact finish thickness differences?

A: Contact finish thickness affects durability, corrosion resistance, and contact resistance. The original part specifies 150.0µin (3.81µm) tin-lead finish on both mating and post surfaces. Amphenol BERGSTIK® parts specify 30.0µin to 78.7µin (0.76µm to 2.00µm) depending on finish type. Molex 0022284263 specifies 15.0µin (0.38µm) gold on mating surfaces. Thicker finishes provide extended service life in corrosive environments; thinner finishes reduce material cost. Selection depends on environmental exposure and application longevity requirements.

Q: Can I use a substitute part with different contact length?

A: Contact length compatibility depends on the mating receptacle design. The original 2-644456-6 specifies 0.295" (7.49mm) mating contact length. Substitute parts range from 0.240" to 0.305" mating contact length. Verify that the selected substitute's contact length accommodates the receptacle's contact cavity depth. Undersized contacts may result in incomplete mating; oversized contacts may cause mechanical interference or damage.

Q: What is the difference between gold and gold GXT™ finishes?

A: Both are gold-plated contact finishes. The GXT™ designation indicates a proprietary gold plating process. Both provide equivalent corrosion resistance and electrical performance for standard applications. Selection between standard gold and gold GXT™ is application-specific and does not affect functional compatibility.

Q: Are the Amphenol BERGSTIK® parts suitable for automotive applications?

A: The Molex 0022284263 explicitly lists automotive applications. Amphenol ICC BERGSTIK® series parts do not specify automotive applications in the provided data. For automotive-specific requirements, the Molex 0022284263 is the documented choice among the listed substitutes.

Q: What packaging options are available?

A: The original 2-644456-6 packaging is not specified. Substitute parts are available in bulk packaging (Molex 0022284263, Amphenol 77311-124-26LF) and bag packaging (Amphenol 77311-122-26LF, 77311-127-26LF, 77311-422-26LF, 77311-822-26LF, 77311-824-26LF, 77311-827-26LF). Packaging selection affects handling, storage, and cost considerations but does not affect electrical or mechanical performance.

Q: Is the extended operating temperature range of Amphenol parts significant?

A: The Amphenol BERGSTIK® series operates from -65°C to 125°C, compared to the original part's -55°C to 105°C range. This 10°C lower and 20°C higher temperature capability accommodates applications in extreme thermal environments, including aerospace, industrial, and outdoor installations. For standard commercial applications within -55°C to 105°C, the extended range provides additional design margin without performance penalty.

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