RT500AS4700JB Equivalent & Substitute Parts

Part Overview

The RT500AS4700JB is a 470 Ohm, 500W wirewound linear potentiometer manufactured by Vishay Sfernice, designed for panel mount applications with a 1-turn adjustment mechanism and solder turret termination. This component is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing system maintenance and new design implementations where this specification remains applicable.

Substiute Parts

RT500AS4700JB

Vishay SferniceIn Stock: 728RT500AS4700JB Datasheet

Current PartRFQ

RRS500E

OhmiteIn Stock: 758RRS500E Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RT500AS4700JB is determined by the following critical parameters:

• Power rating of 500W (exact match required)
• Wirewound resistive material (required for high-power dissipation)
• Linear taper characteristic
• Panel mount configuration
• Single-turn adjustment mechanism
• Single-gang design

The RRS500E from Ohmite qualifies as a manufacturer-recommended substitute based on matching power rating, wirewound construction, linear taper, panel mount design, and single-turn operation. Variations in resistance value (500 Ohm vs. 470 Ohm), tolerance, rotation angle, actuator geometry, body diameter, and termination style represent acceptable engineering trade-offs when the primary functional requirements are preserved.

Parameter Comparison

Engineering Selection Recommendations

The RRS500E serves as the manufacturer-recommended substitute for the obsolete RT500AS4700JB. Selection of this alternative is supported by:

• Active product status ensuring continued availability and supply chain reliability
• ROHS3 compliance meeting current environmental and regulatory standards
• Identical power rating and wirewound construction preserving thermal and electrical performance characteristics
• Matching linear taper and single-turn configuration maintaining functional behavior

Physical differences including body diameter (8.000" vs. 5.630"), actuator geometry (flatted vs. round), and termination style (solder lug vs. solder turret) require mechanical and electrical integration assessment within the specific application context. Resistance value difference (500 Ohm vs. 470 Ohm) represents a 6.4% increase and must be evaluated against circuit tolerance requirements.

Frequently Asked Questions (FAQ)

Q: Can the RRS500E directly replace the RT500AS4700JB without circuit modification?

A: The RRS500E matches critical functional parameters (500W power rating, wirewound construction, linear taper, single-turn operation, panel mount design). However, the 500 Ohm resistance differs from the original 470 Ohm specification. Circuit impact depends on application sensitivity to this 6.4% resistance increase. Termination style differences (solder lug vs. solder turret) require mechanical integration assessment.

Q: What are the key differences between these two potentiometers?

A: Primary differences include resistance value (470 Ohm vs. 500 Ohm), body diameter (5.630" vs. 8.000"), actuator type (round vs. flatted), termination style (solder turret vs. solder lug), and tolerance (±5% vs. ±10%). Both maintain 500W power rating and wirewound construction.

Q: Is the RRS500E suitable for high-temperature applications?

A: Temperature coefficient information is not provided for either component in the available specifications. Thermal performance assessment requires detailed datasheets from the respective manufacturers.

Q: What is the impact of the larger body diameter of the RRS500E?

A: The RRS500E body diameter of 8.000" (203.20mm) exceeds the RT500AS4700JB diameter of 5.630" (143.00mm). Panel cutout and mounting space compatibility must be verified before implementation.

Q: Does the tolerance difference affect substitution suitability?

A: The RRS500E tolerance of ±10% is wider than the original ±5% specification. Applications requiring tighter resistance accuracy may require additional circuit compensation or selection of alternative components with matching tolerance specifications.