Equivalent & Substitute Parts for TE Connectivity 1-644456-0 Rectangular Connector Header

Part Overview

The TE Connectivity 1-644456-0 is a vertical rectangular connector header with 10 positions at 2.54mm pitch, designed for through-hole mounting in board-to-cable/wire applications. This part operates across a temperature range of -55°C to 105°C with a 250VAC voltage rating and features tin-lead plated copper alloy contacts. The 1-644456-0 carries an obsolete product status, making identification of active equivalent and substitute parts essential for ongoing design support and procurement continuity. The part is RoHS non-compliant, which may restrict its use in certain regulated applications.

Key Parameters

Parameter	Value
Connector Type	Header
Contact Type	Male Pin
Number of Positions	10
Pitch - Mating	0.100" (2.54mm)
Mounting Type	Through Hole
Termination	Solder
Operating Temperature Range	-55°C ~ 105°C
Voltage Rating	250VAC
Contact Material	Copper Alloy
Contact Finish - Mating	Tin-Lead
Insulation Material	Thermoplastic
Flammability Rating	UL94 V-0
Product Status	Obsolete
RoHS Status	Non-compliant

Substitute Part Grouping Explanation

Substitution of the 1-644456-0 is determined by the following critical parameters: 10-position configuration, 2.54mm mating pitch, through-hole solder termination, male pin contact type, and thermoplastic insulation. The primary direct substitute is the TE Connectivity 4-644456-0, which maintains identical electrical and mechanical specifications while offering active product status and RoHS compliance. This part differs only in contact finish (tin instead of tin-lead) and packaging format (bulk instead of standard).

Secondary substitutes are sourced from Amphenol ICC (FCI) under the BERGSTIK® series. These parts maintain the core 10-position, 2.54mm pitch, through-hole solder configuration but introduce variations in contact length, contact material (phosphor bronze instead of copper alloy), contact finish (gold or tin options), and operating temperature range (-65°C to 125°C). The BERGSTIK® series parts feature push-pull fastening and board-to-board style designation, distinguishing them from the original board-to-cable/wire application. Contact length variations across the BERGSTIK® lineup (0.260" to 0.305" mating length) accommodate different PCB stack-up requirements while maintaining pitch and position count compatibility.

Substitution logic prioritizes: (1) matching position count and pitch, (2) compatible mounting and termination methods, (3) acceptable operating temperature envelope, (4) contact material and finish suitability for the application, and (5) product status and compliance certifications.

Parameter Comparison

Parameter	1-644456-0	4-644456-0	77311-122-10LF	77311-124-10LF	77311-127-10LF	77311-422-10LF	77311-424-10LF	77311-427-10LF	77311-822-10LF	77311-824-10LF	77311-827-10LF
Manufacturer	TE Connectivity	TE Connectivity	Amphenol ICC (FCI)	Amphenol ICC (FCI)	Amphenol ICC (FCI)	Amphenol ICC (FCI)	Amphenol ICC (FCI)	Amphenol ICC (FCI)	Amphenol ICC (FCI)	Amphenol ICC (FCI)	Amphenol ICC (FCI)
Series	MTA-100	MTA-100	BERGSTIK®	BERGSTIK®	BERGSTIK®	BERGSTIK®	BERGSTIK®	BERGSTIK®	BERGSTIK®	BERGSTIK®	BERGSTIK®
Number of Positions	10	10	10	10	10	10	10	10	10	10	10
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)
Connector Type	Header	Header	Header	Header	Header	Header	Header	Header	Header	Header	Header
Contact Type	Male Pin	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	Through Hole
Termination	Solder	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)	0.260" (6.60mm)
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)	0.105" (2.67mm)
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)	0.465" (11.81mm)
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)	0.100" (2.54mm)
Contact Shape	Square	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	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™	Gold or Gold, GXT™
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	-65°C ~ 125°C
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
Product Status	Obsolete	Active	Active	Active	Active	Active	Active	Active	Active	Active	Active
RoHS Status	Non-compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

Primary Substitute: TE Connectivity 4-644456-0

The 4-644456-0 is the direct equivalent to the obsolete 1-644456-0. Both parts share identical mechanical and electrical specifications, including 10-position configuration, 2.54mm pitch, through-hole solder termination, and operating temperature range of -55°C to 105°C. The 4-644456-0 carries active product status and RoHS compliance, addressing the obsolescence and regulatory limitations of the original part. The only material difference is the contact finish: the 4-644456-0 uses tin plating instead of tin-lead. This substitution is direct and requires no design modification.

Secondary Substitutes: Amphenol ICC BERGSTIK® Series

The BERGSTIK® series parts (77311-122-10LF, 77311-124-10LF, 77311-127-10LF, 77311-422-10LF, 77311-424-10LF, 77311-427-10LF, 77311-822-10LF, 77311-824-10LF, 77311-827-10LF) maintain the core 10-position, 2.54mm pitch, through-hole solder configuration. All BERGSTIK® parts carry active product status and RoHS compliance. These parts operate across an extended temperature range of -65°C to 125°C, exceeding the original specification. Contact length variations across the BERGSTIK® lineup accommodate different PCB stack-up requirements. Selection among BERGSTIK® variants depends on required contact length and contact finish specification (gold or tin options). The BERGSTIK® series introduces phosphor bronze contact material and push-pull fastening, which may require application assessment for compatibility.

Compliance and Regulatory Considerations

All substitute parts listed carry RoHS compliance, addressing the non-compliant status of the original 1-644456-0. All parts maintain UL94 V-0 flammability rating and unlimited moisture sensitivity level (MSL 1). The 4-644456-0 is the recommended choice for direct replacement in existing designs. BERGSTIK® alternatives are suitable for new designs requiring extended temperature performance or specific contact finish requirements.

Frequently Asked Questions (FAQ)

Q: Can the 4-644456-0 directly replace the 1-644456-0 without design changes?

A: Yes. The 4-644456-0 is a direct equivalent with identical mechanical and electrical specifications. Both parts feature 10 positions, 2.54mm pitch, through-hole solder termination, and -55°C to 105°C operating temperature. The only difference is contact finish (tin versus tin-lead) and packaging format. No PCB layout or connector design modifications are required.

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

A: The MTA-100 series (1-644456-0 and 4-644456-0) uses copper alloy contacts with tin or tin-lead finish and operates from -55°C to 105°C. The BERGSTIK® series uses phosphor bronze contacts with gold or tin finish options, operates from -65°C to 125°C, and includes push-pull fastening. Contact length varies across BERGSTIK® variants to accommodate different PCB stack-up requirements. Both series maintain 10-position, 2.54mm pitch, through-hole solder termination.

Q: How do contact length variations in the BERGSTIK® series affect compatibility?

A: Contact length determines the depth of insertion into the mating connector. The BERGSTIK® series offers three mating contact lengths: 0.305" (7.75mm), 0.266" (6.75mm), and 0.260" (6.60mm). Selection depends on the PCB thickness and stack-up configuration. Shorter contact lengths accommodate thinner PCB assemblies, while longer lengths suit thicker stacks. The mating connector must be designed to accept the selected contact length. Pitch and position count remain constant across all variants.

Q: Are BERGSTIK® parts suitable for board-to-cable/wire applications like the original 1-644456-0?

A: The BERGSTIK® series is designated for board-to-board applications and includes push-pull fastening. While the electrical and mechanical specifications support board-to-cable/wire use, the fastening mechanism and application classification differ from the original MTA-100 design. Application assessment is required to confirm suitability for board-to-cable/wire configurations.

Q: What is the significance of the contact finish options (gold versus tin) in the BERGSTIK® series?

A: Contact finish affects electrical performance, corrosion resistance, and cost. Gold-plated contacts (77311-122-10LF, 77311-124-10LF, 77311-127-10LF, 77311-822-10LF, 77311-824-10LF, 77311-827-10LF) provide superior corrosion resistance and lower contact resistance, suitable for low-signal applications and harsh environments. Tin-plated contacts (77311-422-10LF, 77311-424-10LF, 77311-427-10LF) offer cost efficiency for general-purpose applications. Gold finish thickness varies: 30.0µin (0.76µm) for standard gold and 15.0µin (0.38µm) for thin gold options.

Q: Why is the 1-644456-0 marked as obsolete?

A: The 1-644456-0 carries obsolete product status, indicating TE Connectivity has discontinued active production and support. The RoHS non-compliant status further restricts its use in regulated markets. The 4-644456-0 provides an active, RoHS-compliant alternative with identical specifications.

Q: What packaging options are available for these connector headers?

A: The 4-644456-0 is supplied in bulk packaging. BERGSTIK® variants are available in bulk (77311-122-10LF, 77311-124-10LF, 77311-127-10LF, 77311-822-10LF, 77311-824-10LF, 77311-827-10LF) or bag packaging (77311-422-10LF, 77311-424-10LF, 77311-427-10LF). Packaging selection affects handling, storage, and cost considerations but does not impact electrical or mechanical performance.

Q: Are all substitute parts RoHS compliant?

A: Yes. The 4-644456-0 and all BERGSTIK® series parts listed carry RoHS compliance. This addresses the non-compliant status of the original 1-644456-0 and ensures regulatory compliance for new designs and procurement.

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

A: The 1-644456-0 and 4-644456-0 current rating varies by wire gauge. The BERGSTIK® series is rated at 3A per contact. Actual current capacity depends on wire gauge, insulation material, and application environment. Consult connector specifications and application requirements to determine appropriate wire gauge and current limits.

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