TE Connectivity 644803-2 Equivalent & Substitute Parts

Part Overview

The TE Connectivity 644803-2 is a rectangular connector header, right-angle configuration, with 2 positions at 0.100" (2.54mm) pitch. This through-hole, shrouded connector is designed for board-to-cable/wire applications with solder termination and friction lock fastening. The part is classified as obsolete, necessitating identification of equivalent and substitute components for ongoing design and procurement requirements.

Substiute Parts

644803-2

TE Connectivity AMP ConnectorsIn Stock: 785644803-2 Datasheet

Current PartRFQ

2-644803-2

TE Connectivity AMP ConnectorsIn Stock: 6912-644803-2 Datasheet

DirectRFQ

S2B-XH-A-1

JST Sales America Inc.In Stock: 52492S2B-XH-A-1 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the TE Connectivity 644803-2 is determined by the following critical parameters: connector type (header), contact type (male pin), number of positions (2), number of rows (1), mounting type (through hole, right angle), shrouding configuration (shrouded 4-wall), and termination method (solder). The mating pitch, operating temperature range, voltage rating, and flammability classification are essential compatibility criteria.

Two substitute relationships are identified:

Direct Equivalent (2-644803-2): This part maintains identical electrical and mechanical specifications to the main part, including pitch (0.100"/2.54mm), position count, shrouding, mounting orientation, and termination. The primary distinction is product status (active versus obsolete) and RoHS compliance (ROHS3 compliant versus non-compliant). Contact finish changes from Tin-Lead to Tin.

Similar Substitute (S2B-XH-A-1): This JST part provides functional equivalence as a 2-position, right-angle header with shrouded 4-wall configuration and through-hole mounting. However, this substitute operates under different mechanical and electrical constraints: mating pitch of 0.098" (2.50mm) versus 0.100" (2.54mm), reduced operating temperature range (-25°C to 85°C versus -55°C to 105°C), lower insulation height (0.240" versus 0.343"), and different fastening mechanism (detent lock versus friction lock).

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement: The 2-644803-2 is the primary equivalent for the obsolete 644803-2. Both parts maintain identical electrical and mechanical specifications within the MTA-100 series. The 2-644803-2 is active in production and carries ROHS3 compliance, addressing regulatory requirements for new designs. The contact finish change from Tin-Lead to Tin aligns with modern RoHS standards while maintaining functional compatibility.

For Alternative Applications: The S2B-XH-A-1 serves as a functional substitute when design constraints permit accommodation of different mechanical and electrical parameters. This substitute is suitable for applications where the reduced operating temperature range (-25°C to 85°C) and lower insulation height (0.240" versus 0.343") are acceptable. The detent lock fastening mechanism differs from the friction lock of the original part. The mating pitch difference (0.098" versus 0.100") requires verification of mating connector compatibility. This part is active in production and ROHS3 compliant.

Selection between the direct equivalent and similar substitute depends on application-specific requirements regarding operating temperature, mechanical envelope constraints, and mating connector availability.

Frequently Asked Questions (FAQ)

Q: Can the 2-644803-2 be used as a direct replacement for the 644803-2?

A: Yes. The 2-644803-2 maintains identical pitch (0.100"/2.54mm), position count (2), row configuration (1), mounting type (through hole, right angle), shrouding (4-wall), and termination method (solder). Both parts operate across -55°C to 105°C and carry 250VAC rating with UL94 V-0 flammability classification. The primary differences are product status (active versus obsolete) and RoHS compliance (ROHS3 versus non-compliant).

Q: What are the limitations of using the S2B-XH-A-1 as a substitute?

A: The S2B-XH-A-1 differs in three critical areas: mating pitch (0.098" versus 0.100"), operating temperature range (-25°C to 85°C versus -55°C to 105°C), and insulation height (0.240" versus 0.343"). The fastening mechanism is detent lock rather than friction lock. These differences require verification that the mating connector is compatible with the JST XH series and that the application does not require the extended temperature range or larger insulation envelope of the original part.

Q: Are there packaging differences between the main part and substitutes?

A: The 644803-2 packaging is listed as unspecified. The 2-644803-2 is supplied in bulk packaging. The S2B-XH-A-1 is also supplied in bulk packaging. Procurement requirements should specify packaging needs for production quantities.

Q: What is the impact of the contact finish change from Tin-Lead to Tin?

A: The change from Tin-Lead to Tin in the 2-644803-2 reflects RoHS3 compliance requirements. Tin plating provides equivalent electrical performance and corrosion resistance for general-purpose applications. This change does not affect functional compatibility with standard mating connectors.

Q: Can the S2B-XH-A-1 be used in high-temperature applications?

A: No. The S2B-XH-A-1 operates to a maximum of 85°C, compared to 105°C for the original 644803-2. Applications requiring operation above 85°C must use the 644803-2 or 2-644803-2.

Q: What is the significance of the different contact materials (Copper Alloy versus Brass)?

A: The 644803-2 and 2-644803-2 use Copper Alloy contacts, while the S2B-XH-A-1 uses Brass contacts. Both materials provide adequate electrical conductivity and corrosion resistance for general-purpose applications. Material selection does not affect functional compatibility for standard signal and power applications.