TE Connectivity 2-794638-4 Rectangular Connector Header Surface Mount 24 Position 3MM

Part Overview

The TE Connectivity 2-794638-4 is a surface mount rectangular connector header from the Micro MATE-N-LOK series. This component functions as a board-to-cable/wire interface with 24 positions arranged in 2 rows at 0.118" (3.00mm) pitch. The connector features shrouded 4-wall construction with solder termination and locking ramp fastening. The part is classified as Active product status and is suitable for general purpose applications requiring reliable interconnection in temperature ranges from -40°C to 105°C.

Substitute parts are necessary when specific packaging requirements, compliance certifications, or inventory constraints necessitate alternative sourcing while maintaining electrical and mechanical compatibility.

Substiute Parts

2-794638-4

TE Connectivity AMP ConnectorsIn Stock: 10102-794638-4 Datasheet

Current PartRFQ

5-794638-4

TE Connectivity AMP ConnectorsIn Stock: 17095-794638-4 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The substitute part 5-794638-4 is electrically and mechanically equivalent to the main part 2-794638-4 based on the following critical parameters:

Electrical Compatibility:

• Identical connector type (Header), contact type (Male Pin), and pitch specifications (0.118" / 3.00mm)
• Matching voltage rating (250V) and operating temperature range (-40°C ~ 105°C)
• Identical number of positions (24) and row configuration (2 rows)

Mechanical Compatibility:

• Same mounting type (Surface Mount), shrouding configuration (Shrouded - 4 Wall), and termination method (Solder)
• Identical fastening type (Locking Ramp) and insulation material (Polyamide/Nylon)
• Matching insulation height (0.364" / 9.25mm) and contact shape (Square)

Material and Finish Specifications:

• Identical contact material (Brass) and mating contact finish (Gold at 30.0µin / 0.76µm)
• Post contact finish thickness (100.0µin / 2.54µm) is identical
• Same flammability rating (UL94 V-0) and moisture sensitivity level (MSL 1)

The primary difference between these parts is packaging format: 2-794638-4 is supplied in standard packaging, while 5-794638-4 is supplied in Tape & Reel (TR) format. Additionally, 5-794638-4 carries ROHS3 compliance certification.

Parameter Comparison

Engineering Selection Recommendations

Both 2-794638-4 and 5-794638-4 are Active product status components from TE Connectivity's Micro MATE-N-LOK series and are suitable for direct substitution in applications requiring a 24-position surface mount rectangular connector header with 3.00mm pitch.

Selection Criteria:

The 2-794638-4 is appropriate for applications where standard packaging is acceptable and RoHS compliance is not a requirement.

The 5-794638-4 is appropriate for applications requiring ROHS3 compliance certification or where Tape & Reel packaging is specified for automated assembly processes. The Tape & Reel format provides advantages in high-volume manufacturing environments with pick-and-place equipment.

The contact finish difference (Tin-Lead on 2-794638-4 versus Tin on 5-794638-4) does not affect functional compatibility, as both finishes provide equivalent solder joint reliability and electrical performance in the specified operating temperature range.

Both parts carry identical electrical ratings (250V), thermal specifications (-40°C ~ 105°C), and mechanical configurations, ensuring interchangeability in circuit board designs and connector mating applications.

Frequently Asked Questions (FAQ)

Q: Can 5-794638-4 be used as a direct replacement for 2-794638-4 in existing designs?

A: Yes. The 5-794638-4 is electrically and mechanically equivalent to the 2-794638-4. Both parts share identical connector type, pitch, position count, voltage rating, temperature range, and mounting specifications. The primary differences are packaging format (Tape & Reel versus standard) and RoHS compliance status.

Q: What is the significance of the packaging difference between these parts?

A: The 2-794638-4 is supplied in standard packaging suitable for manual handling and small-quantity orders. The 5-794638-4 is supplied in Tape & Reel (TR) format, which is optimized for automated assembly equipment and high-volume production runs. The connector itself is identical; only the delivery format differs.

Q: Are there any compatibility issues with the contact finish difference?

A: No. The 2-794638-4 features Tin-Lead post finish, while the 5-794638-4 features Tin post finish. Both finishes are compatible with standard solder reflow processes and provide equivalent electrical and mechanical performance. The difference reflects manufacturing process variations and does not affect functional interchangeability.

Q: Does the ROHS3 compliance of 5-794638-4 affect its electrical performance?

A: No. ROHS3 compliance is a regulatory and material composition specification, not an electrical performance specification. Both parts meet identical electrical and thermal requirements. The ROHS3 certification on 5-794638-4 indicates compliance with Restriction of Hazardous Substances regulations and may be required for certain applications or markets.

Q: Can these parts be used interchangeably in automated assembly?

A: The 5-794638-4 in Tape & Reel format is specifically designed for automated pick-and-place assembly. The 2-794638-4 in standard packaging can be used in automated assembly with appropriate feeder equipment. Both parts are mechanically and electrically identical, so design compatibility is not affected by the choice between them.

Q: What is the moisture sensitivity level for both parts?

A: Both the 2-794638-4 and 5-794638-4 carry MSL 1 (Unlimited) rating, indicating no moisture sensitivity concerns. These parts do not require special moisture control during storage, handling, or assembly.

Q: Are both parts suitable for the full operating temperature range of -40°C to 105°C?

A: Yes. Both parts are rated for continuous operation across the -40°C to 105°C temperature range. The connector materials, contact finishes, and insulation composition support this full range without performance degradation.