S437-46 Equivalent & Substitute Parts

Part Overview

The S437-46 is a 0.110" (2.79mm) Quick Connect Male Solder Connector with non-insulated design, manufactured by Harwin Inc. This component is classified as Obsolete, making identification of functionally equivalent alternatives essential for ongoing system maintenance and new design implementations. The part operates as a standard terminal for quick-connect applications requiring solder termination and through-hole mounting.

Key Parameters

Parameter	Value
Tab Width	0.110" (2.79mm)
Tab Thickness	0.031" (0.79mm)
Tab Length	0.295" (7.49mm)
Length - Overall	0.472" (12.00mm)
Gender	Male
Termination	Solder
Insulation	Non-Insulated
Mounting Type	Through Hole
Contact Material	Brass
RoHS Status	ROHS3 Compliant
MSL Rating	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the S437-46 is determined by strict equivalence across the following critical parameters:

Tab Width: 0.110" (2.79mm) — mechanical interface requirement
Gender: Male — connector polarity specification
Termination: Solder — assembly method requirement
Insulation: Non-Insulated — design specification
Mounting Type: Through Hole — PCB integration method
Contact Material: Brass — electrical and corrosion resistance requirement
RoHS3 Compliance — regulatory requirement
MSL Rating: 1 — moisture sensitivity specification

The substitute part 735427-2 (TE Connectivity AMP Connectors, Faston series) meets all critical substitution criteria. Minor variations in tab thickness (0.032" vs. 0.031") and overall length (0.488" vs. 0.472") fall within acceptable mechanical tolerances for quick-connect terminal applications. The substitute maintains identical tab width, gender, termination method, insulation type, and mounting configuration.

Parameter Comparison

Parameter	S437-46 (Harwin)	735427-2 (TE Connectivity)	Compatibility
Tab Width	0.110" (2.79mm)	0.110" (2.79mm)	Identical
Tab Thickness	0.031" (0.79mm)	0.032" (0.81mm)	Equivalent
Tab Length	0.295" (7.49mm)	Not Specified	Functionally Compatible
Length - Overall	0.472" (12.00mm)	0.488" (12.40mm)	Equivalent
Gender	Male	Male	Identical
Termination	Solder	Solder	Identical
Insulation	Non-Insulated	Non-Insulated	Identical
Mounting Type	Through Hole	Through Hole	Identical
Contact Material	Brass	Brass	Identical
Contact Finish	Not Specified	Tin	Functionally Compatible
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Identical
MSL Rating	1 (Unlimited)	1 (Unlimited)	Identical

Engineering Selection Recommendations

The 735427-2 (TE Connectivity AMP Connectors, Faston series) is the qualified substitute for the obsolete S437-46. Both components maintain ROHS3 compliance and identical MSL ratings, ensuring regulatory and environmental compatibility.

The substitute part is currently in Active product status with 3963 units available in inventory, providing supply continuity for applications previously using the S437-46. The Faston series designation indicates standardized quick-connect terminal specifications within the TE Connectivity product line.

Mechanical variations between the two parts (tab thickness tolerance of ±0.01" and overall length difference of 0.016") are within standard manufacturing tolerances for quick-connect terminal applications and do not affect functional performance in standard quick-connect receptacle interfaces.

Frequently Asked Questions (FAQ)

Q: Can the 735427-2 be used as a direct replacement for the S437-46?

A: Yes. Both components share identical tab width (0.110"), gender (Male), termination method (Solder), insulation type (Non-Insulated), and mounting configuration (Through Hole). Minor dimensional variations fall within acceptable tolerances for quick-connect terminal applications.

Q: What is the significance of the Faston series designation for the 735427-2?

A: Faston is TE Connectivity's standardized quick-connect terminal series. This designation indicates the part conforms to established quick-connect interface specifications and is suitable for applications requiring standard 0.110" tab width connectors.

Q: Are there compliance differences between the S437-46 and 735427-2?

A: Both parts are ROHS3 compliant with MSL Rating 1 (Unlimited). The substitute maintains equivalent regulatory and environmental compliance status.

Q: Why is the S437-46 listed as Obsolete?

A: Obsolete status indicates the part is no longer manufactured by Harwin Inc. The 735427-2 provides functional equivalence for applications requiring 0.110" quick-connect male solder terminals.

Q: Does the tin contact finish on the 735427-2 affect compatibility?

A: No. Tin finish on brass contact material is a standard surface treatment that enhances corrosion resistance and solderability. This does not affect mechanical or electrical compatibility with quick-connect receptacles designed for 0.110" male terminals.

Q: What packaging format is available for the 735427-2?

A: The 735427-2 is supplied in Bulk packaging, suitable for high-volume assembly operations and component procurement workflows.

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