TE Connectivity AMP Connectors 3-644540-9 Equivalent & Substitute Parts

Part Overview

The TE Connectivity AMP Connectors 3-644540-9 is a 9 Position Rectangular Receptacle Connector designed for IDC (Insulation Displacement Contact) termination with 22 AWG wire. This connector features tin contact finish, feed-through capability, and a locking ramp fastening mechanism. The part is classified as obsolete, necessitating identification of active equivalent alternatives for new designs and ongoing production requirements. Substitute parts maintain functional compatibility while offering current product status and availability.

Key Parameters

Parameter	Value
Connector Type	Receptacle
Number of Positions	9
Pitch	0.100" (2.54mm)
Number of Rows	1
Cable Termination Method	IDC
Wire Gauge	22 AWG
Mounting Type	Free Hanging (In-Line), Right Angle
Fastening Type	Locking Ramp
Contact Type	Female Socket
Series	MTA-100

Substitute Part Grouping Explanation

Substitution of the 3-644540-9 is based on electrical and mechanical parameter equivalence within the MTA-100 series rectangular connector family. The primary substitution criterion is functional compatibility, determined by matching the following parameters:

Connector type (Receptacle)
Number of positions (9)
Pitch spacing (0.100" / 2.54mm)
Number of rows (1)
Cable termination method (IDC)
Wire gauge compatibility (22 AWG)
Mounting configuration (Free Hanging In-Line, Right Angle)
Fastening mechanism (Locking Ramp)
Contact configuration (Female Socket)

The identified substitute part maintains all critical mechanical and electrical parameters. Variations in contact finish material and product status do not affect functional interchangeability in applications where the connector serves as a receptacle interface for IDC-terminated ribbon or discrete cables.

Parameter Comparison

Parameter	3-644540-9 (Main Part)	640620-9 (Substitute)
Manufacturer	TE Connectivity AMP Connectors	TE Connectivity AMP Connectors
Category	Rectangular Connectors	Rectangular Connectors
Series	MTA-100	MTA-100
Connector Type	Receptacle	Receptacle
Contact Type	Female Socket	Female Socket
Number of Positions	9	9
Pitch	0.100" (2.54mm)	0.100" (2.54mm)
Number of Rows	1	1
Mounting Type	Free Hanging (In-Line), Right Angle	Free Hanging (In-Line), Right Angle
Fastening Type	Locking Ramp	Locking Ramp
Cable Termination	IDC	IDC
Wire Type	Discrete or Ribbon Cable	Discrete or Ribbon Cable
Wire Gauge	22 AWG	22 AWG
Features	Feed Through	Feed Through
Contact Finish Thickness	80.0µin (2.03µm)	80.0µin (2.03µm)
Color	Red	Red
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)
Product Status	Obsolete	Active
Contact Finish	Tin	Tin-Lead
RoHS Status	RoHS Compliant	RoHS non-compliant

Engineering Selection Recommendations

The TE Connectivity AMP Connectors 640620-9 serves as the direct functional substitute for the obsolete 3-644540-9. Both connectors are members of the MTA-100 series and maintain identical mechanical and electrical specifications for IDC termination applications with 22 AWG wire.

Selection between these parts depends on regulatory and compliance requirements:

For RoHS-compliant applications: The 3-644540-9 maintains RoHS compliance status. However, as this part is obsolete, long-term availability is not assured. Alternative RoHS-compliant solutions within the MTA-100 series should be evaluated for new designs.

For applications without RoHS constraints: The 640620-9 is the active production equivalent. This part is currently in stock and maintains active product status, ensuring availability for production and service applications. The tin-lead contact finish differs from the tin finish of the main part but does not affect functional interchangeability in standard IDC connector applications.

Both parts share identical contact finish thickness (80.0µin / 2.03µm), moisture sensitivity rating (MSL 1), and mechanical configuration, confirming direct substitution capability.

Frequently Asked Questions (FAQ)

Q: Can the 640620-9 directly replace the 3-644540-9 in existing designs?

A: Yes. Both connectors are 9-position MTA-100 series receptacles with identical pitch (0.100"), mounting configuration, IDC termination method, and 22 AWG wire gauge compatibility. The mechanical and electrical interfaces are equivalent.

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

A: The 3-644540-9 features a tin contact finish, while the 640620-9 features a tin-lead contact finish. Both finishes are applied to the same thickness (80.0µin / 2.03µm). The contact finish material does not affect the mechanical mating or IDC termination function of the connector.

Q: Why is the 3-644540-9 listed as obsolete?

A: Product obsolescence indicates that the part is no longer in active production. The 640620-9 represents the current active equivalent within the MTA-100 series.

Q: Are there RoHS compliance differences between these parts?

A: Yes. The 3-644540-9 is RoHS compliant, while the 640620-9 is RoHS non-compliant. Applications subject to RoHS regulations should confirm compliance requirements before selecting the 640620-9 as a substitute.

Q: What wire types are compatible with both connectors?

A: Both the 3-644540-9 and 640620-9 accept discrete or ribbon cable with 22 AWG wire gauge. IDC termination is the specified cable attachment method for both parts.

Q: Are the mounting configurations identical?

A: Yes. Both connectors feature free hanging (in-line) and right angle mounting options with locking ramp fastening. The mechanical mounting interface is identical.

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

A: Both parts carry an MSL rating of 1 (Unlimited), indicating no moisture sensitivity restrictions for storage or handling.

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