TE Connectivity 647050-8 Equivalent & Substitute Parts

Part Overview

The TE Connectivity 647050-8 is a rectangular connector header for through-hole mounting with 8 positions at 0.100" (2.54mm) pitch. This connector is classified as obsolete, necessitating identification of active equivalent and substitute parts for ongoing design and procurement requirements. The part features shrouded single-wall construction with friction lock fastening, suitable for board-to-cable/wire applications in general-purpose electronics.

Key Parameters

Parameter	Value
Manufacturer Part Number	647050-8
Manufacturer	TE Connectivity AMP Connectors
Series	MTA-100
Connector Type	Header
Contact Type	Male Pin
Number of Positions	8
Pitch - Mating	0.100" (2.54mm)
Mounting Type	Through Hole
Shrouding	Shrouded - 1 Wall
Termination	Solder
Fastening Type	Friction Lock
Contact Shape	Square
Insulation Material	Polyamide (PA4T), Nylon 4T
Operating Temperature	-55°C ~ 105°C
Voltage Rating	250VAC
Material Flammability Rating	UL94 V-0
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution of the TE Connectivity 647050-8 is determined by the following critical parameters:

Primary Matching Criteria:

Connector type: Header
Contact type: Male Pin
Number of positions: 8
Pitch - mating: 0.100" (2.54mm)
Mounting type: Through Hole
Shrouding: Shrouded - 1 Wall
Termination: Solder
Fastening type: Friction Lock
Contact shape: Square
Material flammability rating: UL94 V-0
RoHS compliance: ROHS3 Compliant
Moisture sensitivity level: 1 (Unlimited)

Secondary Compatibility Factors:

Contact length - mating: 0.290" to 0.295" (7.37mm to 7.49mm)
Contact length - post: 0.135" to 0.140" (3.43mm to 3.56mm)
Overall contact length: 0.550" to 0.560" (13.97mm to 14.22mm)
Insulation height: 0.322" to 0.347" (8.18mm to 8.81mm)
Contact finish: Tin or Tin-Lead (mating surface)
Contact material: Copper Alloy or Brass
Insulation material: Polyamide (PA4T or PA), Nylon

Substitution Constraints:

Number of positions loaded must equal 8 (all positions)
Operating temperature range must support -55°C ~ 105°C minimum
Voltage rating must support 250VAC minimum

Parameter Comparison

Parameter	647050-8 (TE)	3-647050-8 (TE)	0022045081 (Molex)	0022045082 (Molex)	0022045084 (Molex)	0022045086 (Molex)	0022045088 (Molex)	0022112082 (Molex)
Manufacturer	TE Connectivity	TE Connectivity	Molex	Molex	Molex	Molex	Molex	Molex
Series	MTA-100	MTA-100	KK254, 6373	KK254, 6373	KK254, 6373	KK254, 6373	KK254, 6373	KK254, 6373
Product Status	Obsolete	Active	Active	Active	Active	Active	Active	Active
Connector Type	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
Number of Positions	8	8	8	8	8	8	8	8
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)
Number of Rows	1	1	1	1	1	1	1	1
Number of Positions Loaded	All	All	5	7	7	7	6	All
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Shrouding	Shrouded - 1 Wall	Shrouded - 1 Wall	Shrouded - 1 Wall	Shrouded - 1 Wall	Shrouded - 1 Wall	Shrouded - 1 Wall	Shrouded - 1 Wall	Shrouded - 1 Wall
Termination	Solder	Solder	Solder	Solder	Solder	Solder	Solder	Solder
Fastening Type	Friction Lock	Friction Lock	Friction Lock	Friction Lock	Friction Lock	Friction Lock	Friction Lock	Friction Lock
Contact Length - Mating	0.290" (7.37mm)	0.290" (7.37mm)	0.295" (7.49mm)	0.295" (7.49mm)	0.295" (7.49mm)	0.295" (7.49mm)	0.295" (7.49mm)	0.295" (7.49mm)
Contact Length - Post	0.135" (3.43mm)	0.135" (3.43mm)	0.140" (3.56mm)	0.140" (3.56mm)	0.140" (3.56mm)	0.140" (3.56mm)	0.140" (3.56mm)	0.140" (3.56mm)
Overall Contact Length	0.550" (13.97mm)	0.550" (13.97mm)	0.560" (14.22mm)	0.560" (14.22mm)	0.560" (14.22mm)	0.560" (14.22mm)	0.560" (14.22mm)	0.560" (14.22mm)
Insulation Height	0.347" (8.81mm)	0.347" (8.81mm)	0.322" (8.18mm)	0.322" (8.18mm)	0.322" (8.18mm)	0.322" (8.18mm)	0.322" (8.18mm)	0.322" (8.18mm)
Contact Shape	Square	Square	Square	Square	Square	Square	Square	Square
Contact Finish - Mating	Tin-Lead	Tin	Tin	Tin	Tin	Tin	Tin	Gold
Contact Finish Thickness - Mating	80.0µin (2.03µm)	80.0µin (2.03µm)	100.0µin (2.54µm)	100.0µin (2.54µm)	100.0µin (2.54µm)	100.0µin (2.54µm)	100.0µin (2.54µm)	20.0µin (0.51µm)
Contact Material	Copper Alloy	Copper Alloy	Brass	Brass	Brass	Brass	Brass	Brass
Insulation Material	Polyamide (PA4T), Nylon 4T	Polyamide (PA4T), Nylon 4T	Polyamide (PA), Nylon	Polyamide (PA), Nylon	Polyamide (PA), Nylon	Polyamide (PA), Nylon	Polyamide (PA), Nylon	Polyamide (PA), Nylon
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
Insulation Color	Black	Black	White	White	White	White	White	White
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

Primary Recommendation: TE Connectivity 3-647050-8

The 3-647050-8 is the direct active equivalent to the obsolete 647050-8. Both parts share identical electrical and mechanical specifications within the MTA-100 series. The 3-647050-8 maintains all critical parameters including contact geometry, insulation material (PA4T Nylon 4T), operating temperature range (-55°C ~ 105°C), and voltage rating (250VAC). The primary difference is product status: 3-647050-8 is active with 3,151 units in stock, compared to the obsolete 647050-8. Contact finish on the 3-647050-8 is Tin rather than Tin-Lead, which is compliant with ROHS3 requirements. This part is the preferred direct replacement.

Secondary Recommendations: Molex KK254/6373 Series

Molex KK254 and 6373 series headers provide functional equivalence with the following considerations:

0022112082 (Molex) - Highest compatibility among Molex alternatives. This part matches all critical parameters including 8 positions fully loaded, 0.100" (2.54mm) pitch, through-hole mounting, shrouded single-wall construction, and friction lock fastening. Contact finish is Gold on mating surface with Tin on post. Insulation material is Polyamide (PA) Nylon. Insulation height is 0.322" (8.18mm), which is 0.025" (0.63mm) lower than the original part. This part has 19,380 units in stock. ROHS3 compliant and MSL 1.

0022045084, 0022045085, 0022045086 (Molex) - These parts have 7 positions loaded rather than all 8 positions. While mechanically compatible with 0.100" (2.54mm) pitch and identical mounting characteristics, the reduced position loading may require design verification for applications requiring all 8 contact positions.

0022045082, 0022045083 (Molex) - Similar to above with 7 positions loaded.

0022045081 (Molex) - Has only 5 positions loaded, limiting applicability to designs requiring fewer contact positions.

0022045088 (Molex) - Has 6 positions loaded.

0022046084 (Molex) - Features Gold contact finish on mating surface with 7 positions loaded. Gold plating provides enhanced corrosion resistance compared to Tin finish.

Substitution Constraints for Molex Parts:

All Molex alternatives have insulation height of 0.322" (8.18mm) compared to the original 0.347" (8.81mm). This 0.025" (0.63mm) difference may affect board layout and clearance calculations. Contact length specifications differ slightly: Molex parts have 0.295" (7.49mm) mating contact length versus 0.290" (7.37mm) on the original. These dimensional variations require mechanical verification in applications with tight spacing constraints.

Frequently Asked Questions (FAQ)

Q: Can I use the Molex KK254 series as a direct replacement for the TE Connectivity 647050-8?

A: Molex KK254 series headers are functionally compatible with the 647050-8 for most applications. Both share identical pitch (0.100"/2.54mm), connector type (header), contact type (male pin), mounting method (through-hole solder), and shrouding (shrouded single-wall). However, dimensional differences exist: Molex parts have lower insulation height (0.322" vs. 0.347") and slightly longer mating contacts (0.295" vs. 0.290"). These differences require verification in designs with tight clearance or spacing requirements. Additionally, most Molex alternatives have fewer than 8 positions loaded, which may not suit applications requiring all 8 contact positions.

Q: What is the difference between the 647050-8 and 3-647050-8?

A: The 3-647050-8 is the active production equivalent of the obsolete 647050-8. Both parts are manufactured by TE Connectivity within the MTA-100 series and share identical mechanical and electrical specifications. The primary difference is contact finish: the original 647050-8 uses Tin-Lead finish, while the 3-647050-8 uses Tin finish to comply with ROHS3 requirements. The 3-647050-8 is the recommended direct replacement.

Q: Why do some Molex alternatives have fewer positions loaded than the original part?

A: The number of positions loaded refers to how many of the 8 available contact positions are populated with pins in the connector header. The original 647050-8 has all 8 positions loaded. Some Molex alternatives (0022045081 through 0022045088) have 5, 6, or 7 positions loaded. These variants are designed for applications requiring fewer contact points. For designs requiring all 8 positions, select 0022112082 (all positions loaded) or use the TE Connectivity 3-647050-8.

Q: Are there operating temperature differences between the original part and substitutes?

A: The TE Connectivity 647050-8 and 3-647050-8 both specify operating temperature range of -55°C ~ 105°C. The Molex KK254/6373 series parts do not provide explicit operating temperature specifications in the available data. For applications requiring confirmed temperature performance, the TE Connectivity parts provide documented specifications.

Q: What is the significance of contact finish (Tin vs. Tin-Lead vs. Gold)?

A: Contact finish affects corrosion resistance and electrical performance. Tin-Lead finish (original 647050-8) provides good solderability but is restricted under ROHS3. Tin finish (3-647050-8 and most Molex alternatives) is ROHS3 compliant and provides adequate corrosion resistance for general-purpose applications. Gold finish (0022112082, 0022046084) offers superior corrosion resistance and is preferred for high-reliability or harsh environment applications, though it increases cost.

Q: Can I use a part with Gold-plated contacts instead of Tin-plated contacts?

A: Yes. Gold-plated contacts (0022112082, 0022046084) are compatible with applications designed for Tin-plated contacts. Gold provides enhanced corrosion resistance and is suitable for all applications where Tin is acceptable. The reverse substitution (Tin for Gold) is not recommended for applications specifically requiring Gold plating.

Q: What does "Shrouded - 1 Wall" mean?

A: Shrouding refers to the plastic housing that surrounds the connector contacts. "1 Wall" indicates that the shroud covers one side of the connector, providing partial protection and keying to prevent incorrect mating orientation. All parts listed maintain this shrouding configuration, ensuring mechanical compatibility.

Q: Are all listed parts ROHS3 compliant?

A: Yes. All substitute parts listed are ROHS3 compliant. The original 647050-8 is also ROHS3 compliant. ROHS3 compliance restricts the use of certain hazardous substances including lead, making these parts suitable for applications subject to ROHS3 regulations.

Q: What is Moisture Sensitivity Level (MSL) 1?

A: MSL 1 indicates unlimited shelf life without special moisture control requirements. All parts listed have MSL 1 rating, meaning they do not require dry-pack storage or baking procedures before use. This simplifies inventory management and reduces handling costs.

Q: How do I verify dimensional compatibility in my specific application?

A: Compare the following critical dimensions: insulation height (0.322" to 0.347"), contact length - mating (0.290" to 0.295"), and overall contact length (0.550" to 0.560"). Measure available board space and clearance to adjacent components. If your design has tight vertical clearance, the lower insulation height of Molex parts (0.322") may provide advantage. If your design requires maximum contact engagement, verify that the slightly longer Molex contacts (0.295" vs. 0.290") do not exceed available mating depth.

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