S531-46 Equivalent & Substitute Parts Reference

Part Overview

The S531-46 is a 0.250" (6.35mm) Quick Connect Male Solder Connector with non-insulated design, manufactured by Harwin Inc. This component is classified as Obsolete, making identification of suitable substitutes essential for ongoing system maintenance and new design implementations. The part features a right-angle mounting configuration with solder termination, brass contact material, and tin finish. Due to its obsolete status, active equivalent parts from current manufacturers are required to maintain supply chain continuity.

Substiute Parts

S531-46

Harwin Inc.In Stock: 1182S531-46 Datasheet

Current PartRFQ

63951-1

TE Connectivity AMP ConnectorsIn Stock: 32664963951-1 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the S531-46 is determined by strict alignment of the following critical parameters:

• Tab Width: 0.250" (6.35mm) — exact match required for mechanical fit
• Gender: Male — connector orientation must remain consistent
• Termination: Solder — connection method must be identical
• Insulation: Non-Insulated — electrical and mechanical design requirement
• Mounting Type: Through Hole, Right Angle — PCB integration method
• Contact Material & Finish: Brass with Tin — electrical conductivity and corrosion resistance
• Compliance: ROHS3 Compliant — regulatory requirement

The substitute part 63951-1 (TE Connectivity AMP Connectors, Faston series) meets all critical substitution criteria. Minor variations in tab thickness (0.032" vs. 0.031") and the addition of specified tab length (0.312") in the substitute part represent acceptable engineering tolerances within industry standards for quick-connect terminal design.

Parameter Comparison

Engineering Selection Recommendations

The 63951-1 from TE Connectivity AMP Connectors (Faston series) is the qualified substitute for the obsolete S531-46. Selection is based on:

• Functional Equivalence: All critical electrical and mechanical parameters align with the original specification
• Regulatory Compliance: Both parts maintain ROHS3 compliance and identical MSL ratings
• Production Status: The substitute is in active production with substantial inventory availability (326,579 pcs), ensuring long-term supply chain reliability
• Industry Standard: The Faston series represents the industry standard for 0.250" quick-connect terminals, providing broad compatibility across applications

The minor tab thickness variation (0.032" vs. 0.031") falls within acceptable mechanical tolerances for quick-connect terminal applications and does not impact functional performance or mating characteristics.

Frequently Asked Questions (FAQ)

Q: Can the 63951-1 be used as a direct replacement for the S531-46?

A: Yes. The 63951-1 meets all critical substitution parameters including tab width, gender, termination method, insulation type, and mounting configuration. The part is mechanically and electrically compatible for direct substitution.

Q: What is the significance of the tab thickness difference (0.031" vs. 0.032")?

A: The 0.001" (0.02mm) difference is within standard manufacturing tolerances for quick-connect terminals and does not affect mating performance or electrical characteristics. Both thicknesses are acceptable for the same receptacle design.

Q: Why is the S531-46 obsolete?

A: The S531-46 is classified as obsolete by Harwin Inc. The 63951-1 represents the current industry standard for this connector type and is recommended for all new designs and ongoing applications.

Q: Are there packaging differences between these parts?

A: The S531-46 packaging information is not specified in available data. The 63951-1 is supplied in Cut Tape (CT) packaging, which is standard for terminal components and suitable for both manual and automated assembly processes.

Q: Do both parts meet the same compliance standards?

A: Yes. Both the S531-46 and 63951-1 are ROHS3 compliant with MSL rating 1 (Unlimited), meeting current regulatory requirements for electronic component manufacturing and use.