RT100AL4700KB Equivalent & Substitute Parts

Part Overview

The RT100AL4700KB is a 470 Ohm, 100W wirewound potentiometer manufactured by Vishay Sfernice, designed for panel mount applications with a 1-turn adjustment mechanism and solder lug termination. This component is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing system maintenance, repair, and new design implementations where this specification remains applicable.

Substiute Parts

RT100AL4700KB

Vishay SferniceIn Stock: 794RT100AL4700KB Datasheet

Current PartRFQ

RKS500E

OhmiteIn Stock: 1151RKS500E Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the RT100AL4700KB is based on the following critical parameters that must align for functional equivalence:

• Power Rating: 100W minimum (exact match required for thermal and electrical performance)
• Resistive Material: Wirewound (maintains frequency response and noise characteristics)
• Termination Style: Solder Lug (ensures mechanical and electrical compatibility with existing PCB layouts)
• Mounting Type: Panel Mount (preserves form factor and installation method)
• Number of Turns: 1 (maintains adjustment resolution and mechanical behavior)
• Rotation: 300° (ensures mechanical compatibility with enclosure cutouts and control interfaces)

The RKS500E from Ohmite meets these core substitution criteria. While the resistance value differs (500 Ohms vs. 470 Ohms), this represents a 6.4% variance within the ±10% tolerance band of the original component, making it functionally equivalent for applications where the nominal resistance value is not critical to circuit performance.

Parameter Comparison

Engineering Selection Recommendations

The RKS500E is the manufacturer-recommended substitute for the RT100AL4700KB. Selection of this alternative is supported by:

• Product Status: The RKS500E maintains active production status, ensuring long-term availability and supply chain continuity, whereas the RT100AL4700KB is obsolete.
• Compliance: The RKS500E is ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements for new installations and repairs.
• Electrical Equivalence: Both components share identical power ratings, termination methods, and mechanical specifications, ensuring direct functional replacement in panel mount applications.
• Resistance Compatibility: The 500 Ohm rating of the RKS500E falls within the tolerance specification of the original 470 Ohm component, permitting use in circuits where resistance variance is accommodated by design margins.

Frequently Asked Questions (FAQ)

Q: Can the RKS500E directly replace the RT100AL4700KB in existing assemblies?

A: Yes. Both components are 100W wirewound potentiometers with identical mounting types, termination styles, rotation angles, and turn counts. The 30 Ohm resistance difference (470 Ω to 500 Ω) represents a 6.4% variance, which falls within the ±10% tolerance specification of both components.

Q: What is the significance of the resistance value difference?

A: The RKS500E operates at 500 Ohms compared to the original 470 Ohms. This 6.4% increase is within the tolerance band and is acceptable for applications where the potentiometer functions as a load resistor, voltage divider, or general-purpose adjustment element. Applications requiring precise resistance matching should be evaluated against circuit design specifications.

Q: Are there packaging differences between these components?

A: The RT100AL4700KB packaging information is not specified in the original documentation. The RKS500E is supplied in bulk packaging. Both components use solder lug termination and panel mount configuration, ensuring mechanical compatibility.

Q: What compliance advantages does the RKS500E offer?

A: The RKS500E is ROHS3 compliant and REACH unaffected, meeting current environmental regulations. The original RT100AL4700KB compliance status is not documented, making the RKS500E the preferred choice for new designs and regulated applications.

Q: Is the RKS500E available in sufficient quantity?

A: Yes. The RKS500E has 1084 pieces in new original stock, providing immediate availability for replacement and new production requirements.