TE Connectivity 644456-4 Equivalent & Substitute Parts

Part Overview

The TE Connectivity 644456-4 is a rectangular connector header for through-hole mounting, featuring 4 positions at 0.100" (2.54mm) pitch. This connector is classified as obsolete, which necessitates identification of active equivalent and substitute parts for ongoing design and procurement requirements. The part functions as a board-to-cable/wire interface with unshrouded male pin contacts and solder termination. Active alternatives are available from both TE Connectivity and Amphenol ICC (FCI) manufacturers, offering improved compliance status and extended availability.

Key Parameters

Parameter	Value
Connector Type	Header
Contact Type	Male Pin
Number of Positions	4
Pitch - Mating	0.100" (2.54mm)
Mounting Type	Through Hole
Termination	Solder
Operating Temperature Range	-55°C ~ 105°C (Main Part) / -65°C ~ 125°C (Amphenol Substitutes)
Voltage Rating	250VAC (Main Part) / Not Specified (Amphenol Substitutes)
Material Flammability Rating	UL94 V-0
Moisture Sensitivity Level	1 (Unlimited)
Contact Material	Copper Alloy (Main Part) / Phosphor Bronze (Amphenol Substitutes)
Insulation Material	Thermoplastic
RoHS Status	Non-compliant (Main Part) / Compliant (Active Substitutes)

Substitute Part Grouping Explanation

Substitution of the TE Connectivity 644456-4 is determined by the following critical parameters:

Primary Compatibility Criteria:

Connector type (Header)
Contact type (Male Pin)
Number of positions (4)
Pitch - mating (0.100" / 2.54mm)
Mounting type (Through Hole)
Termination method (Solder)
Insulation material (Thermoplastic)
Material flammability rating (UL94 V-0)

Secondary Compatibility Considerations:

Operating temperature range (minimum -55°C, maximum 105°C for main part)
Contact length variations (mating and post lengths)
Contact finish specifications (Tin-Lead vs. Tin vs. Gold)
Contact material composition (Copper Alloy vs. Phosphor Bronze)
Fastening type (Unshrouded vs. Push-Pull fastening in Amphenol variants)
Style classification (Board to Cable/Wire vs. Board to Board)

The TE Connectivity 3-644456-4 serves as a direct equivalent, maintaining identical electrical and mechanical specifications while offering active product status and improved RoHS compliance. Amphenol ICC (FCI) BERGSTIK® series parts (77311 base number) provide functional substitution with variations in contact length, contact material, and fastening mechanisms. These Amphenol alternatives accommodate different mating depths and offer enhanced temperature operating ranges.

Parameter Comparison

Parameter	644456-4 (Main)	3-644456-4 (Direct)	77311-122-04LF	77311-124-04LF	77311-127-04LF	77311-422-04LF	77311-424-04LF	77311-427-04LF	77311-822-04LF	77311-824-04LF	77311-827-04LF
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®
Product Status	Obsolete	Active	Active	Active	Active	Active	Active	Active	Active	Active	Active
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	4	4	4	4	4	4	4	4	4	4	4
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
Number of Positions Loaded	All	All	All	All	All	All	All	All	All	All	All
Style	Board to Cable/Wire	Board to Cable/Wire	Board to Board	Board to Board	Board to Board	Board to Board	Board to Board	Board to Board	Board to Board	Board to Board	Board to Board
Shrouding	Unshrouded	Unshrouded	Unshrouded	Unshrouded	Unshrouded	Unshrouded	Unshrouded	Unshrouded	Unshrouded	Unshrouded	Unshrouded
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 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™
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)	15.0µin (0.38µm)
Contact Finish - Post	Tin-Lead	Tin	Tin	Tin	Tin	Tin	Tin	Tin	Tin	Tin	Tin
Contact Material	Copper Alloy	Copper Alloy	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze
Insulation Material	Thermoplastic	Thermoplastic	Thermoplastic	Thermoplastic	Thermoplastic	Thermoplastic	Thermoplastic	Thermoplastic	Thermoplastic	Thermoplastic	Thermoplastic
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
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
Insulation Color	Natural	Natural	Black	Black	Black	Black	Black	Black	Black	Black	Black
Current Rating	Varies by Wire Gauge	Varies by Wire Gauge	3A per Contact	3A per Contact	3A per Contact	3A per Contact	3A per Contact	3A per Contact	3A per Contact	3A per Contact	3A per Contact
RoHS Status	Non-compliant	ROHS3 Compliant	RoHS Compliant	RoHS Compliant	RoHS Compliant	RoHS Compliant	RoHS Compliant	RoHS Compliant	RoHS Compliant	RoHS Compliant	RoHS Compliant
REACH Status	Vendor Undefined	Vendor Undefined	REACH Affected	REACH Affected	REACH Affected	REACH Affected	REACH Affected	REACH Affected	REACH Affected	REACH Affected	REACH Affected
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)
ECCN	EAR99	EAR99	EAR99	EAR99	EAR99	EAR99	EAR99	EAR99	EAR99	EAR99	EAR99

Engineering Selection Recommendations

Direct Equivalent (Recommended for Obsolete Part Replacement):

The TE Connectivity 3-644456-4 is the primary recommended substitute for the obsolete 644456-4. This part maintains identical electrical and mechanical specifications while offering active product status and ROHS3 compliance. The 3-644456-4 is available in bulk packaging with 21,512 pieces in stock, ensuring supply continuity. The transition from Tin-Lead to Tin contact finish aligns with modern RoHS requirements without compromising functional compatibility.

Alternative Substitutes (Amphenol ICC BERGSTIK® Series):

The Amphenol ICC BERGSTIK® series (77311 base number) provides functional substitution with the following considerations:

77311-422-04LF and 77311-822-04LF: Accommodate longer mating contact length (0.305" vs. 0.295"), suitable for applications requiring deeper insertion. The 77311-422-04LF features Tin finish; 77311-822-04LF features Gold finish with reduced thickness (15.0µin).
77311-124-04LF and 77311-424-04LF: Provide intermediate mating contact length (0.266"), appropriate for standard depth applications. The 77311-124-04LF features Gold finish; 77311-424-04LF features Tin finish.
77311-127-04LF and 77311-827-04LF: Offer shorter mating contact length (0.260"), suitable for shallow insertion depth requirements. The 77311-127-04LF features Gold finish; 77311-827-04LF features Gold finish with reduced thickness (15.0µin).

All Amphenol alternatives feature:

RoHS compliance
Extended operating temperature range (-65°C to 125°C vs. -55°C to 105°C)
Phosphor Bronze contact material (enhanced durability vs. Copper Alloy)
Push-Pull fastening mechanism (Board to Board style vs. Board to Cable/Wire)
REACH affected status

Compliance Considerations:

All substitute parts maintain UL94 V-0 flammability rating and MSL 1 (Unlimited) moisture sensitivity level. The transition from RoHS non-compliant (644456-4) to RoHS-compliant alternatives (3-644456-4 and all Amphenol parts) aligns with current regulatory requirements. REACH status varies; TE Connectivity parts show vendor undefined status while Amphenol parts are REACH affected.

Frequently Asked Questions (FAQ)

Q: Can the TE Connectivity 3-644456-4 be used as a direct replacement for the obsolete 644456-4?

A: Yes. The 3-644456-4 maintains identical connector type, contact type, number of positions, pitch, mounting type, termination method, and overall contact length. The primary difference is the contact finish material (Tin vs. Tin-Lead) and RoHS compliance status. Both parts operate within the same temperature range (-55°C to 105°C) and voltage rating (250VAC).

Q: What is the functional difference between the TE Connectivity 3-644456-4 and the Amphenol ICC BERGSTIK® series?

A: The TE Connectivity 3-644456-4 maintains the original board-to-cable/wire style and unshrouded configuration. Amphenol BERGSTIK® parts are classified as board-to-board style with push-pull fastening mechanisms. The Amphenol series offers extended temperature range (-65°C to 125°C) and Phosphor Bronze contact material. Contact length variations across the Amphenol lineup accommodate different mating depths.

Q: How do contact length variations affect substitution?

A: Contact length determines mating depth and insertion force characteristics. The main part (644456-4) and direct equivalent (3-644456-4) feature 0.295" mating contact length. Amphenol alternatives provide three options: 0.305" (77311-422-04LF, 77311-822-04LF), 0.266" (77311-124-04LF, 77311-424-04LF), and 0.260" (77311-127-04LF, 77311-827-04LF). Selection depends on the mating connector depth specification in the application.

Q: What is the significance of contact finish differences (Tin-Lead, Tin, and Gold)?

A: Contact finish affects electrical conductivity, corrosion resistance, and regulatory compliance. The original part uses Tin-Lead (150.0µin thickness). The direct equivalent uses Tin (150.0µin thickness), which is RoHS-compliant. Amphenol alternatives offer Tin (78.7µin thickness) or Gold finishes (30.0µin or 15.0µin thickness). Gold provides superior corrosion resistance; Tin offers cost efficiency. Thickness variations affect contact durability and mating cycles.

Q: Are Amphenol BERGSTIK® parts compatible with the original application?

A: Amphenol BERGSTIK® parts share core electrical and mechanical specifications (4 positions, 2.54mm pitch, through-hole solder termination, UL94 V-0 rating). However, the board-to-board style and push-pull fastening differ from the original board-to-cable/wire unshrouded design. Compatibility depends on whether the application mating connector is also upgraded to BERGSTIK® series or if the original mating connector can accommodate the different contact length and fastening mechanism.

Q: What packaging options are available?

A: The TE Connectivity 3-644456-4 is available in bulk packaging. Amphenol BERGSTIK® parts are available in bulk or bag packaging depending on the specific part number. Packaging selection affects unit cost and inventory management but does not alter electrical or mechanical specifications.

Q: Does the extended temperature range of Amphenol parts affect compatibility?

A: The Amphenol BERGSTIK® series operates from -65°C to 125°C, exceeding the original part's -55°C to 105°C range. This extended range provides additional design margin for applications with extreme temperature exposure. However, if the original application operates within -55°C to 105°C, the extended range does not introduce incompatibility; it simply provides additional operational headroom.

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

A: The main part (644456-4) specifies current rating as "Varies by Wire Gauge," indicating current capacity depends on the connected wire gauge. Amphenol BERGSTIK® substitutes specify 3A per contact, providing a defined current limit. This specification difference reflects the Phosphor Bronze contact material and design optimization in the Amphenol series.

Q: Are there any RoHS or REACH compliance implications for substitution?

A: The original part (644456-4) is RoHS non-compliant. The TE Connectivity 3-644456-4 is ROHS3 compliant. All Amphenol BERGSTIK® parts are RoHS compliant. For applications subject to RoHS regulations, substitution to any of the active alternatives ensures compliance. REACH status is vendor undefined for TE Connectivity parts and REACH affected for Amphenol parts. Applications subject to REACH regulations should confirm specific substance restrictions with the manufacturer.

Q: Can the 644456-4 be used interchangeably with the 3-644456-4 in existing designs?

A: Yes, for applications currently using the 644456-4, the 3-644456-4 provides direct substitution without design modification. Both parts share identical connector type, contact configuration, pitch, mounting method, and termination. The Tin contact finish of the 3-644456-4 is functionally equivalent to the Tin-Lead finish of the original part in standard applications.

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