Equivalent & Substitute Parts for 1-644456-6 Rectangular Connector Header

Part Overview

The TE Connectivity AMP Connectors 1-644456-6 is a vertical rectangular connector header designed for through-hole mounting applications. This component features 16 positions with 0.100" (2.54mm) pitch spacing and is part of the MTA-100 series. The part is classified as obsolete, necessitating identification of active equivalent and substitute components for ongoing design and procurement requirements. Active alternatives from both TE Connectivity and Amphenol ICC manufacturers are available to support continued system integration and maintenance.

Key Parameters

Parameter	Value
Connector Type	Header
Contact Type	Male Pin
Number of Positions	16
Pitch - Mating	0.100" (2.54mm)
Mounting Type	Through Hole
Termination	Solder
Operating Temperature Range	-55°C ~ 105°C
Voltage Rating	250VAC
Material Flammability Rating	UL94 V-0
Insulation Material	Thermoplastic
Contact Material	Copper Alloy

Substitute Part Grouping Explanation

Substitution of the 1-644456-6 connector header is determined by strict alignment of core electrical and mechanical parameters. The following criteria establish substitution validity:

Primary Substitution Criteria:

Connector type: Header
Contact type: Male Pin
Number of positions: 16
Pitch spacing: 0.100" (2.54mm)
Mounting type: Through Hole
Termination method: Solder
Insulation material: Thermoplastic
Material flammability rating: UL94 V-0

Secondary Compatibility Factors:

Operating temperature range (minimum -55°C, maximum 105°C or higher)
Voltage rating (minimum 250VAC or unspecified)
Contact shape: Square
Insulation height: 0.100" (2.54mm)

The substitute parts are grouped into two categories: direct TE Connectivity alternatives and cross-manufacturer Amphenol ICC BERGSTIK® series options. Direct TE Connectivity substitute 4-644456-6 maintains identical core specifications with improved RoHS compliance status. Amphenol ICC alternatives provide functional equivalence with variations in contact finish specifications, contact length dimensions, and fastening mechanisms (Push-Pull fastening type).

Parameter Comparison

Parameter	1-644456-6	4-644456-6	77311-122-16LF	77311-124-16LF	77311-127-16LF	77311-170-16LF	77311-422-16LF	77311-424-16LF	77311-427-16LF	77311-822-16LF	77311-824-16LF
Manufacturer	TE Connectivity	TE Connectivity	Amphenol ICC	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®	BERGSTIK®
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
Number of Positions	16	16	16	16	16	16	16	16	16	16	16
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)
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
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
Insulation Material	Thermoplastic	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	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	-65°C ~ 125°C
Contact Material	Copper Alloy	Copper Alloy	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze
RoHS Status	Non-compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant
Product Status	Obsolete	Active	Active	Active	Active	Active	Active	Active	Active	Active	Active

Engineering Selection Recommendations

Primary Recommendation: 4-644456-6

The 4-644456-6 from TE Connectivity represents the direct successor to the obsolete 1-644456-6. This part maintains identical core specifications including connector type, contact configuration, pitch spacing, mounting method, and operating temperature range. The primary distinction is RoHS compliance status, with 4-644456-6 meeting RoHS requirements while the original part does not. This part is currently in active production status with 696 units in stock. Selection of this part eliminates cross-manufacturer compatibility considerations and maintains design continuity within the TE Connectivity MTA-100 series.

Secondary Recommendations: Amphenol ICC BERGSTIK® Series

The Amphenol ICC 77311 series BERGSTIK® connectors provide functional equivalence across all critical substitution parameters. These parts are available in multiple configurations:

77311-122-16LF and 77311-822-16LF: Extended mating contact length (0.305" / 7.75mm) suitable for applications requiring deeper insertion engagement
77311-124-16LF and 77311-824-16LF: Reduced mating contact length (0.266" / 6.75mm) for space-constrained applications
77311-127-16LF and 77311-427-16LF: Minimal mating contact length (0.260" / 6.60mm) for compact board-to-board configurations
77311-170-16LF: Extended post contact length (0.138" / 3.50mm) for applications requiring longer solder tail engagement

All BERGSTIK® alternatives feature:

RoHS compliance
Extended operating temperature range (-65°C ~ 125°C)
Push-Pull fastening mechanism
Phosphor Bronze contact material
Gold or Tin contact finish options
3A per contact current rating

Contact finish variations distinguish tin-plated options (77311-422-16LF, 77311-424-16LF, 77311-427-16LF) from gold-plated alternatives (77311-122-16LF, 77311-124-16LF, 77311-127-16LF, 77311-170-16LF, 77311-822-16LF, 77311-824-16LF). Selection between these options depends on application-specific corrosion resistance and contact reliability requirements.

Frequently Asked Questions (FAQ)

Q: Can 4-644456-6 be used as a direct replacement for 1-644456-6?

A: Yes. The 4-644456-6 maintains identical electrical and mechanical specifications including 16-position configuration, 0.100" (2.54mm) pitch, through-hole mounting, and solder termination. The primary difference is RoHS compliance status. Both parts are compatible with the same mating connectors and PCB layouts.

Q: What are the key differences between TE Connectivity MTA-100 and Amphenol ICC BERGSTIK® options?

A: Both series meet the core substitution criteria of 16-position, 2.54mm pitch headers with through-hole solder termination. Key differences include: contact material (Copper Alloy vs. Phosphor Bronze), fastening mechanism (none specified vs. Push-Pull), contact finish options (Tin-Lead vs. Gold or Tin), operating temperature range (-55°C to 105°C vs. -65°C to 125°C), and contact length variations. BERGSTIK® parts offer extended temperature capability and multiple contact length options for different application requirements.

Q: How do contact length variations affect substitution compatibility?

A: Contact length variations (mating contact length and post contact length) determine insertion depth and solder tail engagement. These dimensions must be evaluated against specific PCB design requirements. Parts with identical overall contact length (0.505" / 12.83mm for the original part) provide direct mechanical compatibility. BERGSTIK® alternatives offer overall contact lengths ranging from 0.465" to 0.525", requiring PCB layout verification before substitution.

Q: What is the significance of contact finish specifications?

A: Contact finish affects corrosion resistance, contact reliability, and mating force characteristics. The original 1-644456-6 specifies Tin-Lead finish (150.0µin / 3.81µm). Amphenol ICC alternatives offer Gold finish (30.0µin or 15.0µin thickness) or Tin finish (78.7µin / 2.00µm). Gold-plated contacts provide superior corrosion resistance in harsh environments, while tin-plated contacts offer cost efficiency for standard applications. Selection depends on environmental exposure and reliability requirements.

Q: Are all substitute parts RoHS compliant?

A: The original 1-644456-6 is RoHS non-compliant. The direct TE Connectivity substitute 4-644456-6 is RoHS compliant. All Amphenol ICC BERGSTIK® alternatives (77311 series) are RoHS compliant. For applications subject to RoHS requirements, any of the recommended substitutes are acceptable.

Q: What packaging options are available for substitute parts?

A: The 4-644456-6 is supplied in Bulk packaging. Amphenol ICC BERGSTIK® alternatives are available in Bulk packaging (77311-122-16LF, 77311-124-16LF, 77311-822-16LF, 77311-824-16LF) or Bag packaging (77311-170-16LF, 77311-422-16LF, 77311-424-16LF, 77311-427-16LF). Packaging selection does not affect electrical or mechanical compatibility.

Q: Can BERGSTIK® parts with Push-Pull fastening be used in applications designed for unshrouded headers?

A: Yes. The Push-Pull fastening mechanism on BERGSTIK® parts is an additional feature that does not prevent use in unshrouded header applications. The fastening mechanism engages with compatible receptacles but does not interfere with standard mating connector operation. Applications using standard unshrouded receptacles will function with BERGSTIK® headers without modification.

Q: What is the current rating difference between the original part and substitutes?

A: The original 1-644456-6 specifies current rating as "Varies by Wire Gauge" without a defined per-contact rating. Amphenol ICC BERGSTIK® alternatives specify 3A per contact. This higher defined rating provides additional design margin for applications with moderate current requirements. The TE Connectivity 4-644456-6 maintains the original "Varies by Wire Gauge" specification.

Q: Are there inventory considerations for substitute part selection?

A: Current inventory levels are: 1-644456-6 (901 units, obsolete), 4-644456-6 (696 units, active), 77311-122-16LF (905 units), 77311-124-16LF (1148 units), 77311-127-16LF (850 units), 77311-170-16LF (981 units), 77311-422-16LF (1089 units), 77311-424-16LF (1018 units), 77311-427-16LF (765 units), 77311-822-16LF (849 units), and 77311-824-16LF (815 units). All substitute parts maintain adequate stock levels for procurement planning.

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