TE Connectivity 1-644456-2 Equivalent & Substitute Parts

Part Overview

The TE Connectivity 1-644456-2 is a rectangular connector header for through-hole mounting with 12 positions at 2.54mm pitch. This connector is classified as obsolete, which necessitates identification of equivalent and substitute parts for ongoing design and production requirements. The part features unshrouded male pin contacts with tin-lead finish, suitable for board-to-cable/wire applications in general-purpose electronic assemblies.

Key Parameters

Parameter	Value
Manufacturer Part Number	1-644456-2
Manufacturer	TE Connectivity AMP Connectors
Series	MTA-100
Connector Type	Header
Number of Positions	12
Pitch - Mating	0.100" (2.54mm)
Contact Type	Male Pin
Mounting Type	Through Hole
Termination	Solder
Operating Temperature	-55°C ~ 105°C
Voltage Rating	250VAC
Material Flammability Rating	UL94 V-0
Product Status	Obsolete
RoHS Status	RoHS non-compliant

Substitute Part Grouping Explanation

Substitution of the 1-644456-2 is determined by the following critical parameters:

Primary Matching Criteria:

Number of positions: 12
Pitch - mating: 0.100" (2.54mm)
Connector type: Header
Contact type: Male Pin
Mounting type: Through Hole
Termination: Solder
Material flammability rating: UL94 V-0

Secondary Compatibility Factors:

Operating temperature range
Contact finish material and thickness
Contact length specifications
Insulation material and height
RoHS compliance status

Substitute parts are grouped into two categories: direct equivalents from TE Connectivity and cross-manufacturer alternatives from Amphenol ICC (FCI) BERGSTIK® series. Direct equivalents maintain identical form factor and board-to-cable/wire style. Cross-manufacturer alternatives feature board-to-board style with push-pull fastening and different contact materials (phosphor bronze vs. copper alloy), requiring mechanical and electrical validation for specific applications.

Parameter Comparison

Parameter	1-644456-2	4-644456-2	77311-122-12LF	77311-124-12LF	77311-127-12LF	77311-422-12LF	77311-424-12LF	77311-427-12LF	77311-822-12LF	77311-824-12LF
Manufacturer	TE Connectivity	TE Connectivity	Amphenol ICC	Amphenol ICC	Amphenol ICC	Amphenol ICC	Amphenol ICC	Amphenol ICC	Amphenol ICC	Amphenol ICC
Series	MTA-100	MTA-100	BERGSTIK®	BERGSTIK®	BERGSTIK®	BERGSTIK®	BERGSTIK®	BERGSTIK®	BERGSTIK®	BERGSTIK®
Number of Positions	12	12	12	12	12	12	12	12	12	12
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)
Contact Type	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin
Mounting Type	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
Contact Length - Mating	0.295" (7.49mm)	0.295" (7.49mm)	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)
Contact Length - Post	0.110" (2.79mm)	0.110" (2.79mm)	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)
Overall Contact Length	0.505" (12.83mm)	0.505" (12.83mm)	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)
Insulation Height	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)
Contact Shape	Square	Square	Square	Square	Square	Square	Square	Square	Square	Square
Contact Material	Copper Alloy	Copper Alloy	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze
Contact Finish - Mating	Tin-Lead	Tin	Gold or Gold, GXT™	Gold or Gold, GXT™	Gold or Gold, GXT™	Tin	Tin	Tin	Gold or Gold, GXT™	Gold or Gold, GXT™
Contact Finish Thickness - Mating	150.0µin (3.81µm)	150.0µin (3.81µm)	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)
Contact Finish - Post	Tin-Lead	Tin	Tin	Tin-Lead	Tin	Tin	Tin	Tin	Tin	Tin
Insulation Material	Thermoplastic	Thermoplastic	Thermoplastic	Thermoplastic	Thermoplastic	Thermoplastic	Thermoplastic	Thermoplastic	Thermoplastic	Thermoplastic
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
Operating Temperature	-55°C ~ 105°C	-55°C ~ 105°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
RoHS Status	RoHS non-compliant	RoHS Compliant	RoHS Compliant	RoHS non-compliant	RoHS Compliant	RoHS Compliant	RoHS Compliant	RoHS Compliant	RoHS Compliant	RoHS Compliant
Product Status	Obsolete	Active	Active	Active	Active	Active	Active	Active	Active	Active

Engineering Selection Recommendations

Direct Equivalent - Recommended Primary Substitute:

The 4-644456-2 from TE Connectivity is the direct equivalent to the obsolete 1-644456-2. This part maintains identical electrical and mechanical specifications while offering active product status and RoHS compliance. The primary difference is contact finish material on the mating surface, changed from tin-lead to tin. This part is suitable for direct replacement in existing designs without modification.

Cross-Manufacturer Alternatives - Amphenol ICC BERGSTIK® Series:

The Amphenol ICC BERGSTIK® series parts (77311-122-12LF, 77311-124-12LF, 77311-127-12LF, 77311-422-12LF, 77311-424-12LF, 77311-427-12LF, 77311-822-12LF, 77311-824-12LF) provide functional equivalence with the following considerations:

All parts maintain 12-position, 2.54mm pitch configuration with through-hole solder termination
Operating temperature range extends to -65°C ~ 125°C, exceeding the original specification
Contact material differs (phosphor bronze vs. copper alloy), affecting mechanical and electrical properties
Connector style transitions from board-to-cable/wire to board-to-board with push-pull fastening
All BERGSTIK® alternatives are RoHS compliant and active products
Contact length variations exist across the series, requiring mechanical fit validation

Compliance Considerations:

For applications requiring RoHS compliance, the 4-644456-2 or any BERGSTIK® series part is necessary. The original 1-644456-2 is RoHS non-compliant. For applications with extended temperature requirements beyond -55°C to 105°C, BERGSTIK® series parts provide -65°C to 125°C operation.

Frequently Asked Questions (FAQ)

Q: Can the 4-644456-2 be used as a direct replacement for the 1-644456-2?

A: Yes. The 4-644456-2 is the direct equivalent with identical form factor, pin count, pitch, and mounting specifications. The contact finish on the mating surface changes from tin-lead to tin, which does not affect functional compatibility in standard applications.

Q: What is the primary difference between TE Connectivity MTA-100 and Amphenol ICC BERGSTIK® series?

A: The MTA-100 series uses copper alloy contacts with board-to-cable/wire configuration, while BERGSTIK® uses phosphor bronze contacts with board-to-board configuration and push-pull fastening. Contact length specifications also vary within the BERGSTIK® series.

Q: Are all BERGSTIK® alternatives RoHS compliant?

A: Yes. All listed BERGSTIK® parts (77311-122-12LF, 77311-124-12LF, 77311-127-12LF, 77311-422-12LF, 77311-424-12LF, 77311-427-12LF, 77311-822-12LF, 77311-824-12LF) are RoHS compliant. The 4-644456-2 is also RoHS compliant.

Q: What does the contact length variation mean for mechanical compatibility?

A: Contact length determines how far the pin extends from the insulation body. Variations range from 0.260" to 0.305" for mating contact length across the BERGSTIK® series. Shorter contacts may not reach mating receptacles designed for longer pins. Mechanical fit validation is required when selecting parts with different contact lengths.

Q: Which substitute part has the closest contact length to the original 1-644456-2?

A: The 4-644456-2 maintains identical contact lengths (0.295" mating, 0.110" post). Among BERGSTIK® alternatives, 77311-124-12LF and 77311-424-12LF provide the closest mating contact length at 0.266".

Q: Can BERGSTIK® parts be used in applications designed for MTA-100 connectors?

A: Mechanical compatibility depends on the mating receptacle design. BERGSTIK® parts feature board-to-board style with push-pull fastening, while MTA-100 is board-to-cable/wire. Contact length differences also affect fit. Application-specific validation is required.

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

A: Contact finish thickness affects durability and wear resistance. The original 1-644456-2 specifies 150.0µin (3.81µm) tin-lead finish. BERGSTIK® alternatives range from 15.0µin to 78.7µin, with gold-finished parts providing lower thickness. Thinner finishes may be suitable for lower-cycle applications but require validation for high-cycle mating environments.

Q: Are there packaging differences between substitute parts?

A: Yes. The 4-644456-2 is supplied in bulk packaging. BERGSTIK® parts are supplied in either bulk or bag packaging depending on the specific part number. Packaging does not affect electrical or mechanical function.

Q: What is the current rating for these connector headers?

A: The original 1-644456-2 specifies current rating as "Varies by Wire Gauge." BERGSTIK® parts specify 3A per contact. The 4-644456-2 maintains the same current rating specification as the original.

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