Equivalent & Substitute Parts for RT100AL4701KB

Part Overview

The RT100AL4701KB is a 47k 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 and new design implementations where this resistance value and power rating are required.

Substiute Parts

RT100AL4701KB

Vishay SferniceIn Stock: 888RT100AL4701KB Datasheet

Current PartRFQ

RKS5K0E

OhmiteIn Stock: 1032RKS5K0E Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the RT100AL4701KB is constrained by the following critical parameters:

• Resistance Value: The primary specification is 47k Ohm. Substitute parts must match this exact resistance value to maintain circuit functionality.
• Power Rating: 100W minimum is required to ensure thermal performance equivalence.
• Resistive Material: Wirewound construction is specified for this application.
• Termination: Solder lug termination is mandatory for mechanical and electrical compatibility.
• Mounting Configuration: Panel mount with 1-turn, 300° rotation adjustment.
• Tolerance: ±10% tolerance band must be maintained.

The listed substitute RKS5K0E does not meet the primary substitution criterion: it specifies 5k Ohm resistance, which differs significantly from the required 47k Ohm value. This part cannot function as a direct equivalent for the RT100AL4701KB in applications requiring the specified 47k Ohm resistance.

Parameter Comparison

Engineering Selection Recommendations

The RT100AL4701KB is obsolete, and the RKS5K0E is active with current availability (990 pcs in stock). However, direct substitution is not possible due to the resistance value mismatch: RKS5K0E provides 5k Ohm versus the required 47k Ohm specification.

For applications requiring a 47k Ohm, 100W wirewound potentiometer with panel mount configuration, alternative sources must be evaluated that match the complete electrical specification. The RKS5K0E may be considered only for applications where 5k Ohm resistance is functionally acceptable.

The RKS5K0E carries RoHS3 compliance and EAR99 ECCN classification, indicating current regulatory alignment for new designs.

Frequently Asked Questions (FAQ)

Q: Can RKS5K0E replace RT100AL4701KB in my circuit?

A: No. The RKS5K0E has a resistance value of 5k Ohm, while RT100AL4701KB requires 47k Ohm. These are not interchangeable without circuit redesign.

Q: What makes a potentiometer a valid substitute for RT100AL4701KB?

A: A valid substitute must provide 47k Ohm resistance, 100W power rating, wirewound construction, solder lug termination, panel mount configuration, 1-turn adjustment with 300° rotation, and ±10% tolerance.

Q: Why is RT100AL4701KB listed as obsolete?

A: Obsolete status indicates the manufacturer has discontinued production. Existing inventory may be available through authorized distributors, but long-term availability is not guaranteed.

Q: Does the actuator type difference affect substitution?

A: Actuator type (round vs. flatted) affects mechanical interface and user interaction but does not prevent electrical substitution if all other parameters align. However, mechanical compatibility with the mounting panel must be verified.

Q: What is the significance of RoHS3 compliance on RKS5K0E?

A: RoHS3 compliance indicates the component meets current environmental and hazardous substance restrictions, making it suitable for new designs and applications subject to regulatory requirements.