TE Connectivity 644284-4 Rectangular Connector Equivalent & Substitute Parts

Part Overview

The TE Connectivity 644284-4 is a 4-position rectangular receptacle connector from the MTA-156 series, designed for IDC (Insulation Displacement Contact) termination with 18 AWG wire. This connector features gold-plated female socket contacts, a polarizing key, and closed-end design for secure mating with corresponding plug connectors.

The 644284-4 is classified as obsolete. Locating equivalent substitute parts is necessary to support ongoing maintenance, repair, and production requirements for legacy systems utilizing this connector series.

Key Parameters

Parameter	Value
Connector Type	Receptacle
Contact Type	Female Socket
Number of Positions	4
Pitch	0.156" (3.96mm)
Number of Rows	1
Cable Termination Method	IDC
Wire Gauge	18 AWG
Contact Finish	Gold
Contact Finish Thickness	15.0µin (0.38µm)
Fastening Type	Locking Ramp
Features	Closed End, Polarizing Key
Series	MTA-156

Substitute Part Grouping Explanation

Substitution eligibility for the 644284-4 is determined by strict equivalence across the following critical parameters:

Electrical Parameters:

Connector type (Receptacle)
Contact type (Female Socket)
Number of positions (4)
Contact pitch (0.156" / 3.96mm)
Number of rows (1)
Cable termination method (IDC)
Wire gauge compatibility (18 AWG)
Contact finish material and thickness (Gold, 15.0µin)

Mechanical Parameters:

Fastening type (Locking Ramp)
Mounting configuration (Free Hanging, In-Line)
Connector features (Closed End, Polarizing Key)
Series designation (MTA-156)

The substitute part 3-644284-4 maintains complete equivalence across all electrical and mechanical parameters, ensuring direct interchangeability in applications requiring the 644284-4 connector.

Parameter Comparison

Parameter	644284-4 (Main Part)	3-644284-4 (Substitute)	Match Status
Manufacturer	TE Connectivity AMP Connectors	TE Connectivity AMP Connectors	Identical
Series	MTA-156	MTA-156	Identical
Connector Type	Receptacle	Receptacle	Identical
Contact Type	Female Socket	Female Socket	Identical
Number of Positions	4	4	Identical
Pitch	0.156" (3.96mm)	0.156" (3.96mm)	Identical
Number of Rows	1	1	Identical
Mounting Type	Free Hanging (In-Line)	Free Hanging (In-Line)	Identical
Fastening Type	Locking Ramp	Locking Ramp	Identical
Cable Termination	IDC	IDC	Identical
Wire Type	Discrete or Ribbon Cable	Discrete or Ribbon Cable	Identical
Wire Gauge	18 AWG	18 AWG	Identical
Features	Closed End, Polarizing Key	Closed End, Polarizing Key	Identical
Contact Finish	Gold	Gold	Identical
Contact Finish Thickness	15.0µin (0.38µm)	15.0µin (0.38µm)	Identical
Color	Orange	Orange	Identical
Product Status	Obsolete	Active	Substitute is Active
RoHS Status	RoHS non-compliant	ROHS3 Compliant	Substitute offers improved compliance
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	Identical
REACH Status	REACH Unaffected	REACH Unaffected	Identical
ECCN	EAR99	EAR99	Identical
HTSUS	8536.69.8000	8536.69.8000	Identical

Engineering Selection Recommendations

The substitute part 3-644284-4 is a direct functional equivalent to the obsolete 644284-4. Both connectors share identical electrical and mechanical specifications, ensuring complete interchangeability in applications requiring 4-position MTA-156 rectangular receptacle connectors with IDC termination for 18 AWG wire.

The primary distinction between the two parts is product status and regulatory compliance. The 644284-4 is obsolete and RoHS non-compliant, while the 3-644284-4 is an active product with ROHS3 compliance. For new designs, maintenance programs, or applications subject to RoHS requirements, the 3-644284-4 is the appropriate selection.

Both connectors maintain identical moisture sensitivity levels (MSL 1), REACH status, export classification, and tariff codes, ensuring consistency across supply chain and regulatory documentation.

Frequently Asked Questions (FAQ)

Q: Can the 3-644284-4 be used as a direct replacement for the 644284-4?

A: Yes. The 3-644284-4 is electrically and mechanically equivalent to the 644284-4. Both connectors feature identical contact configurations, pitch spacing, termination methods, and fastening mechanisms. Direct substitution is supported without modification to mating connectors or cable assemblies.

Q: What is the difference between the 644284-4 and 3-644284-4?

A: The primary differences are product status and regulatory compliance. The 644284-4 is obsolete and RoHS non-compliant. The 3-644284-4 is an active product with ROHS3 compliance. All electrical and mechanical parameters are identical.

Q: Are there packaging differences between these parts?

A: The 644284-4 packaging specification is not provided in the technical data. The 3-644284-4 is supplied in bulk packaging. Confirm packaging requirements with your procurement specifications.

Q: Will the 3-644284-4 work with existing MTA-156 plug connectors?

A: Yes. Both the 644284-4 and 3-644284-4 are receptacle connectors within the MTA-156 series with identical pitch (0.156"), position count (4), and mechanical design. They mate with standard MTA-156 plug connectors.

Q: Is the 3-644284-4 suitable for applications requiring RoHS compliance?

A: Yes. The 3-644284-4 is ROHS3 compliant, making it suitable for applications and markets with RoHS requirements. The obsolete 644284-4 is RoHS non-compliant.

Q: What wire gauges are compatible with these connectors?

A: Both connectors are specified for 18 AWG wire. The IDC termination method accommodates discrete or ribbon cable configurations at this gauge.

Q: Are there any differences in contact finish between these parts?

A: No. Both connectors feature gold-plated contacts with identical finish thickness of 15.0µin (0.38µm), ensuring equivalent electrical performance and corrosion resistance.

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