TE Connectivity 1-644750-2 Equivalent & Substitute Parts

Part Overview

The TE Connectivity 1-644750-2 is a rectangular connector header designed for through-hole mounting applications. This connector features 12 positions at 0.156" (3.96mm) pitch and is classified as obsolete. The MTA-156 series connector is an unshrouded, single-row header with male pins, solder termination, and tin-plated copper alloy contacts. Due to its obsolete product status, equivalent and substitute parts from active manufacturers are necessary for ongoing design support, production continuity, and component sourcing.

Key Parameters

Parameter	Value
Connector Type	Header
Contact Type	Male Pin
Number of Positions	12
Number of Rows	1
Pitch - Mating	0.156" (3.96mm)
Mounting Type	Through Hole
Termination	Solder
Shrouding	Unshrouded
Contact Finish - Mating	Tin
Contact Finish - Post	Tin
Material Flammability Rating	UL94 V-0
Operating Temperature	-55°C ~ 105°C
Voltage Rating	600VAC
RoHS Status	RoHS Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the TE Connectivity 1-644750-2 are grouped based on strict electrical and mechanical compatibility criteria. All substitute parts must maintain the following core parameters:

Critical Matching Parameters:

12 positions at 0.156" (3.96mm) pitch
Single-row configuration
Through-hole solder termination
Male pin contact type
Unshrouded design
Tin-plated contact finish
UL94 V-0 flammability rating
Operating temperature range of -55°C to 105°C or broader
RoHS compliance status

Substitute Categories:

Category 1: Direct Functional Equivalents Parts that maintain all critical parameters with minimal dimensional variation and active product status. These include the Molex 0026622120 and Samtec FWJ-12-01-T-S and FWJ-12-02-T-S series.

Category 2: Flex Stack Spacer Variants Parts that maintain core electrical parameters but feature adjustable stack heights through the JW series designation. These include JW-12-04-T-S-400-140, JW-12-04-T-S-410-140, JW-12-04-T-S-420-140, JW-12-04-T-S-430-140, JW-12-04-T-S-440-140, JW-12-04-T-S-450-140, and JW-12-04-T-S-460-140. These parts accommodate varying PCB thicknesses and stacking requirements while maintaining electrical compatibility.

All substitute parts are active products with current manufacturing support and RoHS3 compliance status.

Parameter Comparison

Parameter	1-644750-2 (TE)	0026622120 (Molex)	FWJ-12-01-T-S (Samtec)	FWJ-12-02-T-S (Samtec)	JW-12-04-T-S-450-140 (Samtec)
Manufacturer	TE Connectivity	Molex	Samtec Inc.	Samtec Inc.	Samtec Inc.
Product Status	Obsolete	Active	Active	Active	Active
Number of Positions	12	12	12	12	12
Pitch - Mating	0.156" (3.96mm)	0.156" (3.96mm)	0.156" (3.96mm)	0.156" (3.96mm)	0.156" (3.96mm)
Number of Rows	1	1	1	1	1
Connector Type	Header	Header	Header	Header	Header Spacer
Contact Type	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Termination	Solder	Solder	Solder	Solder	Solder
Shrouding	Unshrouded	Unshrouded	Unshrouded	Unshrouded	Unshrouded
Contact Finish - Mating	Tin	Tin	Tin	Tin	Tin
Contact Finish - Post	Tin	Tin	Tin	Tin	Tin
Material Flammability Rating	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	Not specified
Operating Temperature	-55°C ~ 105°C	Not specified	-55°C ~ 105°C	-55°C ~ 105°C	Not specified
Voltage Rating	600VAC	Not specified	600VAC, 845VDC	600VAC, 845VDC	Not specified
RoHS Status	RoHS Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	Not specified
Contact Length - Mating	0.400" (10.16mm)	0.450" (11.43mm)	0.450" (11.43mm)	0.500" (12.70mm)	0.140" (3.556mm) Post
Contact Length - Post	0.175" (4.45mm)	0.140" (3.56mm)	0.175" (4.45mm)	0.175" (4.45mm)	0.140" (3.556mm)
Overall Contact Length	0.700" (17.78mm)	0.720" (18.29mm)	0.750" (19.05mm)	0.800" (20.32mm)	0.680" (17.272mm)
Insulation Height	0.125" (3.18mm)	0.130" (3.30mm)	0.125" (3.18mm)	0.125" (3.18mm)	Not specified
Contact Shape	Circular	Square	Square	Square	Not specified
Insulation Material	Thermoplastic, Glass Filled	Polyester, Glass Filled	Polybutylene Terephthalate (PBT)	Polybutylene Terephthalate (PBT)	Not specified
Inventory Status	842 Pcs	1001 Pcs	677 Pcs	1058 Pcs	846 Pcs

Engineering Selection Recommendations

Primary Substitutes for Direct Replacement:

The Molex 0026622120 and Samtec FWJ-12-01-T-S represent the most direct functional equivalents to the TE Connectivity 1-644750-2. Both parts maintain the critical 12-position, 0.156" pitch configuration with through-hole solder termination and tin-plated contacts. Both are active products with ROHS3 compliance and unlimited moisture sensitivity ratings.

The Molex 0026622120 features a push-pull fastening mechanism and operates with 11 positions loaded. The Samtec FWJ-12-01-T-S maintains all 12 positions loaded and includes push-pull fastening with a broader voltage rating specification (600VAC, 845VDC). Both parts are suitable for general purpose, industrial, and telecommunications applications.

Secondary Substitutes for Flexible Stack Applications:

The Samtec JW series (JW-12-04-T-S-400-140 through JW-12-04-T-S-460-140) provides alternative solutions when stack height flexibility is required. These flex stack spacer connectors maintain the 12-position, 0.156" pitch electrical interface while offering variable stack heights from 0.400" to 0.460" in 0.010" increments. These parts are suitable for applications requiring accommodation of different PCB thicknesses or stacking configurations.

Compliance Considerations:

All substitute parts maintain RoHS3 compliance status and unlimited moisture sensitivity levels. The TE Connectivity 1-644750-2 is RoHS compliant; substitute parts are ROHS3 compliant, representing an enhanced compliance standard. All parts carry EAR99 ECCN classification and 8536.69.4040 HTSUS code.

Inventory Availability:

Active substitute parts demonstrate strong inventory availability, ranging from 677 to 1058 pieces in stock, compared to 842 pieces of the obsolete TE Connectivity part.

Frequently Asked Questions (FAQ)

Q: Can the Molex 0026622120 directly replace the TE Connectivity 1-644750-2?

A: The Molex 0026622120 maintains electrical compatibility through identical 12-position, 0.156" pitch configuration, through-hole solder termination, and tin-plated contact finish. Minor dimensional variations exist in contact length and insulation height. The Molex part operates with 11 positions loaded versus all 12 positions on the TE part. Both parts carry UL94 V-0 flammability ratings and unlimited moisture sensitivity levels.

Q: What is the difference between the Samtec FWJ series and the JW series?

A: The Samtec FWJ series (FWJ-12-01-T-S and FWJ-12-02-T-S) are standard headers with fixed stack heights of 0.750" and 0.800" respectively. The Samtec JW series are flex stack spacer connectors with variable stack heights ranging from 0.400" to 0.460". The FWJ series is suitable for standard board-to-board applications, while the JW series accommodates varying PCB thicknesses and stacking requirements.

Q: Are all substitute parts RoHS compliant?

A: Yes. The TE Connectivity 1-644750-2 is RoHS compliant. All substitute parts are ROHS3 compliant, which represents an enhanced compliance standard that includes additional restricted substances beyond the original RoHS directive.

Q: What are the key electrical parameters that determine substitution compatibility?

A: The critical parameters are 12 positions at 0.156" (3.96mm) pitch, single-row configuration, through-hole solder termination, male pin contact type, and tin-plated contact finish. All substitute parts maintain these parameters. Operating temperature range, voltage rating, and flammability rating should be verified against specific application requirements.

Q: Can the JW flex stack series be used in applications designed for the TE Connectivity 1-644750-2?

A: The JW flex stack series maintains electrical compatibility through identical pitch, position count, and contact configuration. However, the JW series features different overall contact lengths and stack heights. Selection depends on PCB thickness, stacking requirements, and available board space. The JW-12-04-T-S-450-140 provides a stack height of 0.450" (11.430mm), which is closest to the TE part's overall contact length of 0.700" (17.78mm).

Q: What is the contact shape difference between the TE part and substitute parts?

A: The TE Connectivity 1-644750-2 features circular contact shapes, while the Molex 0026622120 and Samtec FWJ series feature square contact shapes. Both contact geometries are compatible with standard 0.156" pitch mating connectors and receptacles. Contact shape does not affect electrical performance or pitch compatibility.

Q: Are there any fastening type differences between the main part and substitutes?

A: The TE Connectivity 1-644750-2 does not specify a fastening type. The Molex 0026622120 and Samtec FWJ series include push-pull fastening mechanisms. The Samtec JW series does not specify fastening type. Push-pull fastening provides additional mechanical retention in mated connector pairs.

Q: What packaging options are available for substitute parts?

A: All substitute parts are supplied in bulk packaging. The TE Connectivity 1-644750-2 does not specify packaging type. Bulk packaging is standard for through-hole connector headers and is suitable for production assembly environments.

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