RT500AS4700KB Equivalent & Substitute Parts

Part Overview

The RT500AS4700KB 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. The product is currently obsolete, making identification of functionally equivalent alternatives essential for ongoing system maintenance, repair, and component sourcing.

Substiute Parts

RT500AS4700KB

Vishay SferniceIn Stock: 847RT500AS4700KB Datasheet

Current PartRFQ

RRS500E

OhmiteIn Stock: 758RRS500E Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The RRS500E from Ohmite qualifies as a functional substitute based on the following critical parameters:

• Power Rating Match: Both parts are rated for 500W operation, meeting thermal and electrical load requirements
• Resistive Material: Both utilize wirewound construction, ensuring comparable frequency response and noise characteristics
• Taper Configuration: Both employ linear taper, maintaining identical control response curves
• Mounting Configuration: Both are panel mount potentiometers with single-gang, single-turn adjustment
• Tolerance Class: Both maintain ±10% resistance tolerance
• Adjustment Type: Both support user-defined adjustment mechanisms

The RRS500E operates at 500 Ohms nominal resistance, representing a 6.4% variance from the 470 Ohm specification. This variance falls within the ±10% tolerance band of the original part and is acceptable for substitution in applications where the potentiometer functions as a load resistor or general-purpose adjustment element.

Parameter Comparison

Engineering Selection Recommendations

The RRS500E is the manufacturer-recommended substitute for the obsolete RT500AS4700KB. Selection of the RRS500E is supported by the following factors:

• Product Status: The RRS500E maintains active production status, ensuring long-term availability and supply chain continuity
• Compliance Certifications: The RRS500E is ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements
• Electrical Equivalence: Matching power rating, taper, and resistive material ensure functional compatibility in the intended application
• Mechanical Interface: Both parts employ panel mount configuration with compatible bushing and actuator dimensions suitable for standard potentiometer mounting hardware

Termination style differs between the parts (solder turret versus solder lug); however, both termination methods are compatible with standard PCB and chassis mounting practices. Actuator geometry differences (round versus flatted) do not affect electrical performance and represent only cosmetic or ergonomic variation.

Frequently Asked Questions (FAQ)

Q: Can the RRS500E directly replace the RT500AS4700KB without circuit modification?

A: The RRS500E functions as an electrical equivalent within the tolerance specifications of the original part. The 30 Ohm resistance difference (470 Ohm to 500 Ohm) represents a 6.4% variance, which is absorbed within the ±10% tolerance band. No circuit modification is required for applications where the potentiometer operates as a load resistor or general adjustment element. Applications requiring precise resistance values should evaluate the impact of this variance on system performance.

Q: What are the differences in termination style between these parts?

A: The RT500AS4700KB uses solder turret termination, while the RRS500E uses solder lug termination. Both termination methods are suitable for soldering to PCBs or chassis connections. Solder lug termination may require different PCB pad geometry or wire attachment methods compared to solder turret configuration. Verify mechanical compatibility with existing mounting hardware before implementation.

Q: Are there differences in actuator design that affect functionality?

A: The RT500AS4700KB features a round actuator, while the RRS500E uses a flatted actuator design. These differences are mechanical only and do not affect electrical performance. Actuator geometry may influence user interface ergonomics or compatibility with existing control knobs. Verify that existing knob assemblies are compatible with the flatted actuator profile of the RRS500E.

Q: What is the significance of the rotation angle difference?

A: The RT500AS4700KB provides 300° of rotation, while the RRS500E provides 325° of rotation. Both are single-turn potentiometers. The additional 25° rotation in the RRS500E does not affect electrical equivalence and may provide improved resolution or control sensitivity in applications requiring fine adjustment. This difference does not preclude substitution.

Q: Is the RRS500E suitable for all applications previously using the RT500AS4700KB?

A: The RRS500E is suitable for applications where the potentiometer functions as a load resistor, general-purpose adjustment element, or control interface. Applications requiring precise resistance matching, specific actuator geometry, or exact rotation characteristics should evaluate compatibility on a case-by-case basis. The active product status and current compliance certifications of the RRS500E make it the preferred choice for new designs and ongoing system support.