RT500AS1R00KB Equivalent & Substitute Parts

Part Overview

The RT500AS1R00KB is a 1 Ohm, 500W wirewound linear potentiometer manufactured by Vishay Sfernice, designed for panel mount applications with a round actuator and solder turret termination. This component is classified as obsolete, making identification of suitable substitute parts essential for ongoing system maintenance and new design implementations where equivalent functionality is required.

Substiute Parts

RT500AS1R00KB

Vishay SferniceIn Stock: 1186RT500AS1R00KB Datasheet

Current PartRFQ

RRS1R0E

OhmiteIn Stock: 1212RRS1R0E Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the RT500AS1R00KB is determined by strict equivalence across the following critical parameters:

• Resistance value: 1 Ohm (exact match required)
• Power dissipation capability: 500W (minimum requirement)
• Taper characteristic: Linear (functional requirement)
• Construction type: Wirewound (material specification)
• Mounting configuration: Panel Mount (mechanical requirement)
• Tolerance band: ±10% (electrical specification)

The RRS1R0E from Ohmite satisfies all mandatory electrical and mechanical parameters. Variations in secondary characteristics such as actuator geometry, body diameter, rotation angle, and termination style (solder lug versus solder turret) do not affect functional equivalence for potentiometer substitution, provided the core electrical specifications remain identical.

Parameter Comparison

Engineering Selection Recommendations

The RRS1R0E is the designated manufacturer-recommended substitute for the RT500AS1R00KB. This substitution is supported by:

• Identical electrical specifications across all critical parameters (resistance, power rating, tolerance, taper, and construction type)
• Active product status of the RRS1R0E, ensuring continued availability and supply chain reliability
• RoHS3 compliance and REACH unaffected status of the substitute part, meeting current regulatory requirements
• Mechanical compatibility for panel mount applications, with termination style differences (solder lug versus solder turret) addressable through standard PCB layout modifications

The obsolete status of the RT500AS1R00KB necessitates transition to the RRS1R0E for new procurements and system redesigns.

Frequently Asked Questions (FAQ)

Q: Can the RRS1R0E directly replace the RT500AS1R00KB without circuit modifications?

A: The RRS1R0E provides electrical equivalence across all functional parameters. Mechanical integration requires verification of termination compatibility; the RRS1R0E uses solder lug termination whereas the RT500AS1R00KB uses solder turret. PCB layout adjustment may be necessary.

Q: What is the significance of the rotation angle difference (300° versus 325°)?

A: Rotation angle defines the mechanical sweep range of the potentiometer shaft. The 25° difference does not affect electrical substitution capability but should be verified against application-specific mechanical constraints.

Q: Are there packaging differences between these parts?

A: The RT500AS1R00KB is specified with solder turret termination; the RRS1R0E uses solder lug termination. Both are panel mount configurations. Verify PCB pad geometry compatibility before implementation.

Q: Why is the RRS1R0E recommended over other potential 1 Ohm, 500W wirewound potentiometers?

A: The RRS1R0E is the manufacturer-recommended substitute, ensuring validated electrical and mechanical compatibility. It maintains active product status, providing supply chain continuity and regulatory compliance.

Q: Does the larger body diameter of the RRS1R0E (8.000" versus 5.630") affect substitution?

A: Body diameter is a mechanical characteristic that does not affect electrical function. Panel mount applications must accommodate the larger diameter; verify mechanical clearance in the target application before implementation.