Equivalent & Substitute Parts for TE Connectivity 1-644886-2

Part Overview

The TE Connectivity 1-644886-2 is a rectangular connector header designed for through-hole mounting applications. This connector features 12 vertical positions with 0.100" (2.54mm) pitch spacing and is classified as part of the MTA-100 series. The part is currently listed as obsolete, making identification of functionally equivalent alternatives necessary for ongoing design support and component procurement.

The 1-644886-2 serves as a board-to-cable/wire interface with unshrouded male pin contacts, kinked pin solder termination, and gold-plated mating surfaces. Its operating temperature range of -55°C to 105°C and 250VAC voltage rating support general-purpose applications across industrial and commercial electronics.

Key Parameters

Parameter	Value
Manufacturer Part Number	1-644886-2
Manufacturer	TE Connectivity AMP Connectors
Series	MTA-100
Connector Type	Header
Contact Type	Male Pin
Number of Positions	12
Pitch - Mating	0.100" (2.54mm)
Number of Rows	1
Mounting Type	Through Hole
Termination	Kinked Pin, Solder
Shrouding	Unshrouded
Contact Finish - Mating	Gold
Contact Material	Copper Alloy
Insulation Material	Thermoplastic
Operating Temperature	-55°C ~ 105°C
Voltage Rating	250VAC
Material Flammability Rating	UL94 V-0
Product Status	Obsolete
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the 1-644886-2 are identified based on strict electrical and mechanical compatibility criteria. All substitute candidates must satisfy the following core parameters:

Critical Matching Parameters:

12 positions
0.100" (2.54mm) mating pitch
Single row configuration
Through-hole mounting
Male pin contact type
Unshrouded design
Solder termination
Thermoplastic insulation
UL94 V-0 flammability rating

Acceptable Variations:

Contact material: Copper alloy or phosphor bronze
Contact finish: Gold or tin (both provide adequate electrical conductivity)
Contact finish thickness: Variations within industry standards
Operating temperature range: Extended ranges (-65°C to 125°C) are acceptable for applications within the original -55°C to 105°C specification
Style: Board-to-board substitutes are acceptable for board-to-cable applications when mechanical fit permits
Fastening type: Push-pull fastening is compatible with unshrouded headers

All substitute parts listed are from Amphenol ICC (FCI) BERGSTIK® series, which maintains dimensional and electrical compatibility with the original TE Connectivity MTA-100 series connector.

Parameter Comparison

Parameter	1-644886-2 (Main)	77311-122-12LF	77311-124-12LF	77311-127-12LF	77311-422-12LF	77311-424-12LF	77311-427-12LF	77311-822-12LF	77311-824-12LF	77311-827-12LF
Manufacturer	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	BERGSTIK®	BERGSTIK®	BERGSTIK®	BERGSTIK®	BERGSTIK®	BERGSTIK®	BERGSTIK®	BERGSTIK®	BERGSTIK®
Connector Type	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
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)
Number of Rows	1	1	1	1	1	1	1	1	1	1
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Termination	Kinked Pin, Solder	Solder	Solder	Solder	Solder	Solder	Solder	Solder	Solder	Solder
Shrouding	Unshrouded	Unshrouded	Unshrouded	Unshrouded	Unshrouded	Unshrouded	Unshrouded	Unshrouded	Unshrouded	Unshrouded
Contact Material	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
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	-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
Current Rating	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	ROHS3 Compliant	RoHS Compliant	RoHS non-compliant	RoHS Compliant	RoHS Compliant	RoHS Compliant	RoHS Compliant	RoHS Compliant	RoHS Compliant	RoHS Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

Primary Substitutes for RoHS3 Compliance:

For applications requiring ROHS3 compliance equivalent to the original 1-644886-2, the following parts are recommended:

77311-122-12LF: Active status, RoHS compliant, extended operating temperature range (-65°C to 125°C), 3A per contact current rating, gold or gold GXT™ mating finish with 30.0µin thickness
77311-127-12LF: Active status, RoHS compliant, extended operating temperature range, 3A per contact current rating, gold or gold GXT™ mating finish with 30.0µin thickness
77311-822-12LF: Active status, RoHS compliant, extended operating temperature range, 3A per contact current rating, gold or gold GXT™ mating finish with 15.0µin thickness
77311-827-12LF: Active status, RoHS compliant, extended operating temperature range, 3A per contact current rating, gold or gold GXT™ mating finish with 15.0µin thickness

Alternative Substitutes with Extended Temperature Performance:

77311-124-12LF: Active status, RoHS compliant, extended operating temperature range, 3A per contact current rating, gold or gold GXT™ mating finish
77311-424-12LF: Active status, RoHS compliant, extended operating temperature range, 3A per contact current rating, tin mating finish
77311-427-12LF: Active status, RoHS compliant, extended operating temperature range, 3A per contact current rating, tin mating finish
77311-824-12LF: Active status, RoHS compliant, extended operating temperature range, 3A per contact current rating, gold or gold GXT™ mating finish with 15.0µin thickness

Non-Compliant Alternative:

77311-124-12: Active status, RoHS non-compliant, suitable only for applications without RoHS requirements

All substitute parts maintain active product status, ensuring continued availability and manufacturing support. The extended operating temperature range of -65°C to 125°C provides enhanced thermal performance compared to the original specification of -55°C to 105°C. All substitutes carry UL94 V-0 flammability certification and MSL 1 moisture sensitivity rating, matching the original part's environmental specifications.

Frequently Asked Questions (FAQ)

Q: Can the 77311 series BERGSTIK® connectors directly replace the TE Connectivity MTA-100 1-644886-2?

A: Yes. All listed 77311 series substitutes maintain mechanical and electrical compatibility with the 1-644886-2. The 0.100" (2.54mm) pitch, 12-position single-row configuration, through-hole mounting, and unshrouded design are identical across all parts. Solder termination is compatible with kinked pin termination applications.

Q: What is the difference between gold-plated and tin-plated contact finishes?

A: Gold-plated contacts (77311-122-12LF, 77311-124-12LF, 77311-127-12LF, 77311-822-12LF, 77311-824-12LF, 77311-827-12LF) provide superior corrosion resistance and lower contact resistance. Tin-plated contacts (77311-422-12LF, 77311-424-12LF, 77311-427-12LF) offer cost efficiency while maintaining adequate electrical conductivity for general-purpose applications. Both finishes are acceptable for the specified 250VAC voltage rating.

Q: What does the "LF" designation in part numbers indicate?

A: The "LF" suffix indicates lead-free termination, compliant with RoHS regulations. Parts without the "LF" designation (such as 77311-124-12) contain lead and are non-compliant with RoHS requirements.

Q: Are there packaging differences between substitute parts?

A: Yes. Some substitutes are supplied in bulk packaging (77311-122-12LF, 77311-124-12, 77311-124-12LF, 77311-822-12LF, 77311-824-12LF, 77311-827-12LF), while others are supplied in bag packaging (77311-127-12LF, 77311-422-12LF, 77311-424-12LF, 77311-427-12LF). Packaging does not affect electrical or mechanical performance.

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

A: Contact finish thickness affects durability and corrosion resistance. The original 1-644886-2 specifies 30.0µin (0.76µm) gold thickness. Substitutes offer either 30.0µin (77311-122-12LF, 77311-124-12LF, 77311-127-12LF) or 15.0µin (77311-822-12LF, 77311-824-12LF, 77311-827-12LF) gold thickness. Both thicknesses meet industry standards for general-purpose applications. Tin-plated alternatives specify 78.7µin (2.00µm) thickness.

Q: Can I use a substitute with an extended operating temperature range in place of the original part?

A: Yes. All listed substitutes operate from -65°C to 125°C, which encompasses the original specification of -55°C to 105°C. Extended temperature capability does not compromise performance within the original operating range.

Q: What is the current rating difference between the original and substitute parts?

A: The original 1-644886-2 specifies current rating as "varies by wire gauge," dependent on the connected wire. All substitute parts specify 3A per contact, providing a defined current capacity suitable for standard through-hole applications with appropriate wire gauges.

Q: Are all substitute parts currently in active production?

A: All listed substitutes except 77311-124-12 are active products. The 77311-124-12 is active but RoHS non-compliant. For new designs, select from the RoHS-compliant active alternatives to ensure long-term availability and regulatory compliance.

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