Bourns 3435S-1-502 Equivalent & Substitute Parts

Part Overview

The Bourns 3435S-1-502 is a 5k Ohm 1.5W wirewound linear potentiometer designed for panel mount applications with continuous rotation and solder turret termination. This part is classified as obsolete, making identification of suitable substitute components essential for ongoing system maintenance and new design implementations. The 3435 series has been superseded by newer potentiometer designs that maintain core functional parameters while offering improved availability and compliance status.

Substiute Parts

3435S-1-502

Bourns Inc.In Stock: 8523435S-1-502 Datasheet

Current PartRFQ

6574S-1-502

Bourns Inc.In Stock: 9026574S-1-502 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

The Bourns 6574S-1-502 qualifies as a functional substitute based on the following matching parameters:

• Resistance value: 5k Ohm (identical)
• Taper characteristic: Linear (identical)
• Number of turns: 1.0 (identical)
• Rotation type: Continuous (identical)
• Termination style: Solder Turret (identical)
• Number of gangs: 1 (identical)

The 6574S-1-502 differs in resistive material (conductive plastic versus wirewound), power rating (2W versus 1.5W), mounting configuration (servo mount versus panel mount), and physical dimensions. These differences must be evaluated against specific application requirements before substitution.

Parameter Comparison

Engineering Selection Recommendations

The 6574S-1-502 is available as an active product with ROHS3 compliance, addressing the obsolescence status of the 3435S-1-502. Selection of this substitute requires verification of the following application-specific factors:

Mechanical compatibility must be confirmed, as the 6574S-1-502 features servo mount configuration and larger body diameter (2.008" versus 1.060") compared to the panel mount 3435S-1-502. The increased power rating (2W versus 1.5W) provides additional thermal margin in applications where the original 1.5W specification was limiting.

Tolerance and temperature coefficient differences must be evaluated against circuit requirements. The 6574S-1-502 exhibits wider tolerance (±10% versus ±3%) and significantly higher temperature coefficient (±500ppm/°C versus ±20ppm/°C), which may impact precision-dependent applications.

The conductive plastic resistive material of the 6574S-1-502 differs from the wirewound construction of the 3435S-1-502, affecting frequency response and noise characteristics in signal conditioning applications.

Frequently Asked Questions (FAQ)

Q: Can the 6574S-1-502 directly replace the 3435S-1-502 in existing designs?

A: Direct mechanical replacement is not possible due to different mounting types (servo mount versus panel mount) and body dimensions. Electrical substitution is feasible only if the application tolerates the wider tolerance specification (±10%), higher temperature coefficient (±500ppm/°C), and conductive plastic material characteristics.

Q: What are the key differences in resistive material between these potentiometers?

A: The 3435S-1-502 uses wirewound construction, while the 6574S-1-502 uses conductive plastic. Wirewound potentiometers typically exhibit lower noise and better frequency response, while conductive plastic potentiometers offer smoother operation and longer mechanical life in high-cycle applications.

Q: How do tolerance specifications affect substitution?

A: The 3435S-1-502 specifies ±3% tolerance, while the 6574S-1-502 specifies ±10%. Applications requiring precision resistance values must account for this wider tolerance band in the substitute part.

Q: What is the significance of the temperature coefficient difference?

A: The 3435S-1-502 exhibits ±20ppm/°C temperature coefficient, while the 6574S-1-502 exhibits ±500ppm/°C. In temperature-sensitive applications, the substitute part will experience greater resistance variation across operating temperature ranges.

Q: Does RoHS compliance affect substitution decisions?

A: The 3435S-1-502 is RoHS non-compliant, while the 6574S-1-502 is ROHS3 compliant. For applications subject to RoHS regulations or environmental compliance requirements, the 6574S-1-502 provides the necessary certification status.

Q: Are the solder turret terminations compatible between these parts?

A: Both parts feature solder turret termination style, ensuring electrical connection compatibility. However, physical mounting differences require mechanical redesign of the circuit board or mounting structure.