S409-46 Equivalent & Substitute Parts

Part Overview

The S409-46 is a 0.248" (6.30mm) Quick Connect Male Solder Connector manufactured by Harwin Inc. This non-insulated terminal is designed for through-hole mounting applications requiring solder termination. The part is classified as obsolete, making identification of suitable substitute components essential for ongoing design support and procurement continuity. Substitute parts must maintain functional equivalence in tab dimensions, termination method, and electrical performance characteristics.

Substiute Parts

S409-46

Harwin Inc.In Stock: 934S409-46 Datasheet

Current PartRFQ

1287-ST

Keystone ElectronicsIn Stock: 24722471287-ST Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the S409-46 is determined by the following critical parameters:

• Tab Width: 0.248" (6.30mm) nominal dimension with tolerance allowance for 0.250" (6.35mm) quick-connect receptacles
• Tab Thickness: 0.031" (0.79mm) to 0.032" (0.81mm) range maintains proper contact pressure and insertion force
• Tab Length: 0.309" (7.85mm) to 0.312" (7.92mm) ensures adequate contact engagement
• Termination Method: Solder termination required for PCB integration
• Contact Material & Finish: Brass with tin finish for corrosion resistance and electrical conductivity
• Mounting Configuration: Through-hole mounting for standard PCB assembly
• Compliance: ROHS3 compliance required for regulatory alignment

The 1287-ST substitute meets these criteria within acceptable mechanical and electrical tolerances for quick-connect terminal applications.

Parameter Comparison

Engineering Selection Recommendations

The 1287-ST from Keystone Electronics is the designated manufacturer-recommended substitute for the obsolete S409-46. Selection is based on:

• Functional Equivalence: Tab dimensions fall within acceptable quick-connect terminal tolerances, ensuring proper mating with standard 0.250" receptacles
• Compliance Alignment: Both parts maintain ROHS3 compliance and equivalent electrical performance characteristics
• Manufacturing Status: The 1287-ST is actively produced with established supply chain availability, addressing the obsolescence of the original part
• Mechanical Compatibility: Solder termination, contact material, and finish specifications are identical, supporting direct PCB assembly integration
• Overall Length Consideration: The 1287-ST has a longer profile (0.552" vs 0.474"). Verify clearance in confined PCB layouts before implementation

Frequently Asked Questions (FAQ)

Q: Can the 1287-ST be used as a direct replacement for the S409-46?

A: Yes, the 1287-ST is the manufacturer-recommended substitute. Tab dimensions, termination method, and contact specifications are compatible with quick-connect receptacles designed for the S409-46. Verify overall length clearance in your specific PCB layout.

Q: What is the tolerance range for tab width compatibility?

A: Quick-connect terminals with tab widths between 0.248" (6.30mm) and 0.250" (6.35mm) are mechanically compatible. The 1287-ST at 0.250" falls within this range and maintains proper contact engagement.

Q: Are there any compliance differences between the two parts?

A: Both the S409-46 and 1287-ST are ROHS3 compliant with identical contact material (brass) and finish (tin). No compliance barriers exist for substitution.

Q: Does the longer overall length of the 1287-ST affect compatibility?

A: The 1287-ST is 0.078" (1.98mm) longer than the S409-46. This difference does not affect electrical or mechanical function but may impact PCB layout in space-constrained applications. Confirm clearance with your board design before procurement.

Q: What packaging is available for the 1287-ST?

A: The 1287-ST is supplied in bulk packaging with high inventory availability (2,472,235 pieces in stock), supporting production requirements without lead-time constraints.