TE Connectivity 644375-5 Rectangular Connector Equivalent & Substitute Parts

Part Overview

The TE Connectivity 644375-5 is a 5-position rectangular receptacle connector from the MTA-156 series, designed for IDC (Insulation Displacement Contact) termination with 18 AWG discrete or ribbon cable. This connector features tin-lead contact finish, free-hanging in-line mounting, and locking ramp fastening. The part is classified as obsolete, necessitating identification of equivalent and substitute components for ongoing design support and procurement requirements.

Key Parameters

Parameter	Value
Connector Type	Receptacle
Number of Positions	5
Pitch	0.156" (3.96mm)
Contact Type	Female Socket
Cable Termination	IDC
Wire Gauge	18 AWG
Mounting Type	Free Hanging (In-Line)
Fastening Type	Locking Ramp
Contact Finish Thickness	80.0µin (2.03µm)
Series	MTA-156

Substitute Part Grouping Explanation

Substitution of the TE Connectivity 644375-5 is determined by strict equivalence across the following critical parameters: connector type (receptacle), number of positions (5), pitch (0.156"), contact type (female socket), cable termination method (IDC), wire gauge (18 AWG), mounting type (free hanging in-line), and fastening type (locking ramp). All substitute parts must maintain identical electrical and mechanical interfaces to ensure direct compatibility within existing designs.

The substitute parts identified fall into two categories:

Direct Equivalent: Part 3-644375-5 maintains complete parameter equivalence to the original 644375-5, with the distinction that it carries active product status and RoHS compliance certification.

Series-Compatible Substitute: Part 3-640599-5 shares all critical mechanical and electrical parameters with the main part, including series designation (MTA-156), but differs in contact finish material (tin versus tin-lead) and connector color (orange versus black).

Parameter Comparison

Parameter	644375-5 (Main Part)	3-644375-5 (Direct Equivalent)	3-640599-5 (Series-Compatible)
Manufacturer	TE Connectivity AMP Connectors	TE Connectivity AMP Connectors	TE Connectivity AMP Connectors
Series	MTA-156	MTA-156	MTA-156
Connector Type	Receptacle	Receptacle	Receptacle
Number of Positions	5	5	5
Pitch	0.156" (3.96mm)	0.156" (3.96mm)	0.156" (3.96mm)
Contact Type	Female Socket	Female Socket	Female Socket
Cable Termination	IDC	IDC	IDC
Wire Gauge	18 AWG	18 AWG	18 AWG
Mounting Type	Free Hanging (In-Line)	Free Hanging (In-Line)	Free Hanging (In-Line)
Fastening Type	Locking Ramp	Locking Ramp	Locking Ramp
Contact Finish	Tin-Lead	Tin-Lead	Tin
Contact Finish Thickness	80.0µin (2.03µm)	80.0µin (2.03µm)	80.0µin (2.03µm)
Color	Black	Black	Orange
Product Status	Obsolete	Active	Active
RoHS Status	RoHS non-compliant	RoHS Compliant	RoHS Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

For Direct Replacement: Part 3-644375-5 is the primary substitute for obsolete part 644375-5. This part maintains identical electrical and mechanical specifications while offering active product status and RoHS compliance. Selection of 3-644375-5 is appropriate for applications requiring exact parameter equivalence and regulatory compliance.

For Series-Compatible Applications: Part 3-640599-5 provides functional equivalence within the MTA-156 series and is suitable for applications where contact finish material variation (tin versus tin-lead) is acceptable. The contact finish thickness remains equivalent at 80.0µin (2.03µm). This part carries active product status and RoHS compliance. The orange connector color distinguishes this variant from the original black housing.

Both substitute parts maintain identical mechanical interfaces, pitch spacing, and IDC termination compatibility with 18 AWG cable, ensuring direct functional substitution within existing connector systems.

Frequently Asked Questions (FAQ)

Q: Can 3-644375-5 be used as a direct replacement for 644375-5?

A: Yes. Part 3-644375-5 maintains complete electrical and mechanical equivalence to 644375-5 across all critical parameters including connector type, position count, pitch, contact type, termination method, wire gauge, mounting configuration, and fastening mechanism. The primary differences are product status (active versus obsolete) and RoHS compliance certification.

Q: What is the difference between 3-644375-5 and 3-640599-5?

A: Both parts are MTA-156 series receptacles with identical mechanical and electrical specifications. The primary differences are contact finish material (tin-lead versus tin) and connector color (black versus orange). Contact finish thickness remains equivalent at 80.0µin (2.03µm) for both parts.

Q: Are the substitute parts compatible with existing 644375-5 connector systems?

A: Yes. Both substitute parts maintain identical pitch (0.156"), mounting type (free hanging in-line), fastening type (locking ramp), and IDC termination compatibility with 18 AWG cable. Direct mechanical and electrical interchangeability is ensured.

Q: Does contact finish material affect connector performance?

A: Contact finish material and thickness are specified parameters. Both substitute parts maintain the specified contact finish thickness of 80.0µin (2.03µm). The difference between tin-lead (644375-5 and 3-644375-5) and tin (3-640599-5) represents a material variation within the MTA-156 series.

Q: What is the packaging difference between these parts?

A: Part 644375-5 and 3-644375-5 have packaging listed as not specified. Part 3-640599-5 is supplied in bulk packaging.

Q: Are all substitute parts RoHS compliant?

A: Part 3-644375-5 and 3-640599-5 are both RoHS compliant. The original part 644375-5 is RoHS non-compliant.

Q: What is the moisture sensitivity level for these connectors?

A: All three parts carry Moisture Sensitivity Level 1 (Unlimited), indicating no moisture sensitivity restrictions for storage or handling.

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