TE Connectivity 643820-5 Rectangular Connector Equivalent & Substitute Parts

Part Overview

The TE Connectivity 643820-5 is a 5-position rectangular receptacle connector from the MTA-156 series, designed for IDC (Insulation Displacement Contact) termination with 24 AWG discrete or ribbon cable. This connector features a tin-lead contact finish, closed-end design with polarizing key, and free-hanging in-line mounting configuration. The part is currently active in production with 931 pieces in stock inventory.

Identification of equivalent and substitute parts is necessary to address supply chain requirements, compliance specifications, and manufacturing flexibility while maintaining electrical and mechanical compatibility within the MTA-156 connector family.

Substiute Parts

643820-5

TE Connectivity AMP ConnectorsIn Stock: 985643820-5 Datasheet

Current PartRFQ

3-643820-5

TE Connectivity AMP ConnectorsIn Stock: 11443-643820-5 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution between TE Connectivity 643820-5 and 3-643820-5 is permissible based on the following alignment of critical parameters:

Electrical Compatibility Parameters:

• Identical connector type (Receptacle)
• Identical number of positions (5)
• Identical pitch specification (0.156" / 3.96mm)
• Identical series designation (MTA-156)
• Identical cable termination method (IDC)
• Identical wire gauge rating (24 AWG)
• Identical contact type (Female Socket)

Mechanical Compatibility Parameters:

• Identical mounting type (Free Hanging In-Line)
• Identical fastening type (Locking Ramp)
• Identical features (Closed End, Polarizing Key)
• Identical contact finish thickness (80.0µin / 2.03µm)
• Identical color (White)
• Identical moisture sensitivity level (MSL 1)

Differentiating Parameter:

• Contact finish material: 643820-5 specifies Tin-Lead; 3-643820-5 specifies Tin only
• RoHS compliance status differs between parts

The primary distinction between these parts is the contact finish composition and resulting regulatory compliance posture. Both parts maintain identical mechanical and electrical interface specifications within the MTA-156 connector family.

Parameter Comparison

Engineering Selection Recommendations

For RoHS3 Compliant Applications: Select part number 3-643820-5. This part carries ROHS3 compliance certification and is suitable for applications subject to RoHS Directive requirements. The tin contact finish eliminates lead content while maintaining the 80.0µin finish thickness specification.

For Legacy or Non-Regulated Applications: Part number 643820-5 remains available with tin-lead contact finish. This part is suitable for applications where RoHS compliance is not a requirement and where tin-lead contact material is specified.

Supply Chain Considerations: Both parts maintain active production status. Part 3-643820-5 currently carries higher inventory availability (1103 pieces versus 931 pieces), which may influence procurement decisions for high-volume requirements.

Mechanical and Electrical Equivalence: Both parts are fully equivalent in all mechanical and electrical interface parameters. Selection between these parts should be driven by regulatory compliance requirements and contact finish material specifications rather than functional compatibility concerns.

Frequently Asked Questions (FAQ)

Q: Are 643820-5 and 3-643820-5 mechanically interchangeable?

A: Yes. Both connectors share identical mechanical specifications including pitch (0.156"), number of positions (5), mounting type (free hanging in-line), fastening type (locking ramp), and overall form factor within the MTA-156 series.

Q: Are these connectors electrically interchangeable?

A: Yes. Both connectors support identical electrical specifications: 24 AWG wire gauge, IDC termination method, female socket contact type, and 80.0µin contact finish thickness. The contact finish material difference (tin-lead versus tin) does not affect electrical interface compatibility.

Q: What is the primary difference between these two parts?

A: The primary difference is the contact finish material and resulting regulatory compliance status. Part 643820-5 features tin-lead contact finish and is RoHS non-compliant. Part 3-643820-5 features tin contact finish and is ROHS3 compliant.

Q: Can I substitute 3-643820-5 for 643820-5 in existing designs?

A: Substitution is permissible from a mechanical and electrical standpoint. However, design documentation and regulatory compliance requirements must be reviewed to confirm that the ROHS3 compliant tin finish is acceptable for the intended application.

Q: Can I substitute 643820-5 for 3-643820-5 in RoHS-regulated applications?

A: No. The 643820-5 is RoHS non-compliant and is not suitable for applications subject to RoHS Directive requirements. The 3-643820-5 must be used for RoHS-compliant designs.

Q: Are there packaging differences between these parts?

A: The 643820-5 packaging specification is not provided in available documentation. The 3-643820-5 is supplied in bulk packaging. Packaging requirements should be confirmed with the supplier for specific procurement needs.

Q: Do both parts support discrete and ribbon cable termination?

A: Yes. Both connectors support IDC termination for discrete or ribbon cable configurations with 24 AWG wire gauge.

Q: What is the polarizing key feature?

A: The polarizing key is a mechanical feature that ensures correct orientation during connector mating. Both parts include this feature to prevent incorrect insertion.