TE Connectivity 1-644884-7 Equivalent & Substitute Parts

Part Overview

The TE Connectivity 1-644884-7 is a rectangular connector header manufactured under the MTA-100 series. This through-hole connector features 17 positions at 0.100" (2.54mm) pitch with male pin contacts and gold-plated mating surfaces. The part is classified as obsolete, necessitating identification of active equivalent alternatives that maintain functional compatibility for board-to-cable and board-to-board applications.

Substitute parts are required due to the obsolete product status of the original TE Connectivity component. Active alternatives from Amphenol ICC (FCI) BERGSTIK® series provide equivalent electrical and mechanical performance with current manufacturing support.

Key Parameters

Parameter	Value
Connector Type	Header
Contact Type	Male Pin
Number of Positions	17
Pitch - Mating	0.100" (2.54mm)
Number of Rows	1
Mounting Type	Through Hole
Termination	Solder
Shrouding	Unshrouded
Contact Shape	Square
Insulation Material	Thermoplastic
Operating Temperature Range	-55°C ~ 105°C (Main Part); -65°C ~ 125°C (Substitutes)
Material Flammability Rating	UL94 V-0
Moisture Sensitivity Level	1 (Unlimited)
RoHS Status	ROHS3 Compliant (Main); RoHS Compliant (Substitutes)

Substitute Part Grouping Explanation

Substitution of the TE Connectivity 1-644884-7 with Amphenol ICC (FCI) BERGSTIK® series connectors is based on the following critical parameters:

Core Compatibility Parameters:

Connector type: Header
Contact type: Male pin
Number of positions: 17
Mating pitch: 0.100" (2.54mm)
Number of rows: 1
Mounting type: Through hole
Termination: Solder
Contact shape: Square
Insulation material: Thermoplastic
Flammability rating: UL94 V-0

Substitute Parts Organized by Contact Length and Finish:

The nine substitute parts from Amphenol ICC (FCI) are differentiated by two primary variables:

Contact Length Variants (affecting overall connector height):
- Long: 0.305" mating / 0.120" post (77311-122-17LF, 77311-422-17LF, 77311-822-17LF)
- Medium: 0.266" mating / 0.114" post (77311-124-17LF, 77311-424-17LF, 77311-824-17LF)
- Short: 0.260" mating / 0.105" post (77311-127-17LF, 77311-427-17LF, 77311-827-17LF)
Contact Finish Variants (mating surface):
- Gold or Gold, GXT™ at 30.0µin (0.76µm) thickness (77311-122-17LF, 77311-124-17LF, 77311-127-17LF, 77311-822-17LF, 77311-824-17LF, 77311-827-17LF)
- Gold or Gold, GXT™ at 15.0µin (0.38µm) thickness (77311-822-17LF, 77311-824-17LF, 77311-827-17LF)
- Tin at 78.7µin (2.00µm) thickness (77311-422-17LF, 77311-424-17LF, 77311-427-17LF)

All substitute parts feature phosphor bronze contact material with tin post finish, push-pull fastening, and expanded operating temperature range (-65°C ~ 125°C).

Parameter Comparison

Parameter	1-644884-7 (Main)	77311-122-17LF	77311-124-17LF	77311-127-17LF	77311-422-17LF	77311-424-17LF	77311-427-17LF	77311-822-17LF	77311-824-17LF	77311-827-17LF
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®
Product Status	Obsolete	Active	Active	Active	Active	Active	Active	Active	Active	Active
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	17	17	17	17	17	17	17	17	17	17
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	Solder	Solder	Solder	Solder	Solder	Solder	Solder	Solder	Solder	Solder
Shrouding	Unshrouded	Unshrouded	Unshrouded	Unshrouded	Unshrouded	Unshrouded	Unshrouded	Unshrouded	Unshrouded	Unshrouded
Contact Shape	Square	Square	Square	Square	Square	Square	Square	Square	Square	Square
Contact Length - Mating	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)	0.120" (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)	0.525" (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)
Insulation Material	Thermoplastic	Thermoplastic	Thermoplastic	Thermoplastic	Thermoplastic	Thermoplastic	Thermoplastic	Thermoplastic	Thermoplastic	Thermoplastic
Contact Material	Copper Alloy	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze
Contact Finish - Mating	Gold	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	30.0µin (0.76µm)	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	Not specified	Tin	Tin	Tin	Tin	Tin	Tin	Tin	Tin	Tin
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
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
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
RoHS Status	ROHS3 Compliant	RoHS Compliant	RoHS Compliant	RoHS Compliant	RoHS Compliant	RoHS Compliant	RoHS Compliant	RoHS Compliant	RoHS Compliant	RoHS Compliant
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

Engineering Selection Recommendations

Primary Selection Criteria:

All nine substitute parts from the Amphenol ICC (FCI) BERGSTIK® series are active products with current manufacturing support, addressing the obsolescence of the TE Connectivity 1-644884-7. Selection among substitutes depends on application-specific requirements for contact length and mating surface finish.

Contact Length Selection:

77311-122-17LF, 77311-422-17LF, 77311-822-17LF (Long variant): 0.305" mating contact length. Select when maximum mating depth is required or when interfacing with receptacles designed for longer contact engagement.
77311-124-17LF, 77311-424-17LF, 77311-824-17LF (Medium variant): 0.266" mating contact length. Select for standard applications where contact length approximates the original TE Connectivity part (0.295").
77311-127-17LF, 77311-427-17LF, 77311-827-17LF (Short variant): 0.260" mating contact length. Select for space-constrained applications or when interfacing with receptacles designed for shorter contact engagement.

Mating Surface Finish Selection:

Gold or Gold, GXT™ at 30.0µin (0.76µm) (77311-122-17LF, 77311-124-17LF, 77311-127-17LF): Provides corrosion resistance and electrical reliability equivalent to the original TE Connectivity part. Select for general-purpose applications and environments with moderate corrosion exposure.
Gold or Gold, GXT™ at 15.0µin (0.38µm) (77311-822-17LF, 77311-824-17LF, 77311-827-17LF): Reduced gold thickness while maintaining corrosion protection. Select for cost-optimized applications where thinner gold plating is acceptable.
Tin at 78.7µin (2.00µm) (77311-422-17LF, 77311-424-17LF, 77311-427-17LF): Tin mating surface provides cost reduction compared to gold-plated variants. Select for applications where gold plating is not required and cost optimization is prioritized.

Compliance Considerations:

All substitute parts are RoHS compliant and maintain UL94 V-0 flammability rating. Substitute parts feature expanded operating temperature range (-65°C ~ 125°C) compared to the original part (-55°C ~ 105°C), providing enhanced thermal performance for demanding applications.

Frequently Asked Questions (FAQ)

Q: Can the Amphenol ICC (FCI) BERGSTIK® parts directly replace the TE Connectivity 1-644884-7?

A: Yes. All nine substitute parts maintain electrical and mechanical compatibility through identical connector type, contact type, position count, mating pitch, mounting type, termination method, and contact shape. Differences in contact length and mating surface finish require selection based on specific application requirements.

Q: What is the primary difference between the three contact length variants?

A: Contact length variants affect the overall height of the connector and the depth of mating engagement. The long variant (0.305" mating) provides maximum engagement depth, the medium variant (0.266" mating) approximates the original part dimensions, and the short variant (0.260" mating) minimizes connector height. Selection depends on receptacle design and available board space.

Q: How do the mating surface finish options differ?

A: Gold-plated variants (30.0µin and 15.0µin thickness) provide superior corrosion resistance and are suitable for general-purpose and harsh environment applications. Tin-plated variants (78.7µin thickness) offer cost reduction and are suitable for applications where gold plating is not required. All finishes maintain electrical reliability for the specified current rating.

Q: Are there packaging differences among the substitute parts?

A: Yes. The 77311-122-17LF is supplied in bulk packaging, while 77311-124-17LF through 77311-827-17LF are supplied in bag packaging. Packaging selection does not affect electrical or mechanical performance and is determined by procurement and inventory requirements.

Q: What is the current rating for the substitute parts?

A: All Amphenol ICC (FCI) BERGSTIK® substitute parts are rated at 3A per contact, providing defined current capacity compared to the original part specification of "varies by wire gauge."

Q: Do the substitute parts support the same operating temperature range?

A: The substitute parts support an expanded operating temperature range of -65°C ~ 125°C compared to the original part range of -55°C ~ 105°C. This provides enhanced thermal performance for applications requiring extended temperature operation.

Q: Are all substitute parts RoHS compliant?

A: Yes. All nine substitute parts are RoHS compliant. The original TE Connectivity part is ROHS3 compliant, and all substitutes meet RoHS requirements for new designs.

Q: Which substitute part most closely matches the original TE Connectivity 1-644884-7?

A: The 77311-124-17LF provides the closest dimensional match with 0.266" mating contact length (compared to 0.295" in the original) and gold-plated mating surface at 30.0µin thickness, matching the original finish specification. This part is available in bulk packaging with active product status.

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