RT100AS2201KB Equivalent & Substitute Parts

Part Overview

The RT100AS2201KB is a 2.2k Ohm, 100W wirewound potentiometer manufactured by Vishay Sfernice, designed for panel mount applications with a 1-turn rotation 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 specification remains applicable.

Substiute Parts

RT100AS2201KB

Vishay SferniceIn Stock: 1061RT100AS2201KB Datasheet

Current PartRFQ

RLS2K25E

OhmiteIn Stock: 789RLS2K25E Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the RT100AS2201KB is determined by the following critical parameters:

• Resistance Value: Substitute parts must operate within the tolerance band of the original specification. The RT100AS2201KB operates at 2.2k Ohms with ±10% tolerance, establishing a functional range of 1.98k to 2.42k Ohms.
• Power Rating: The substitute must meet or exceed the 100W power dissipation requirement to ensure thermal stability and component longevity in the application.
• Wirewound Construction: The resistive material type must remain wirewound to maintain electrical characteristics and frequency response appropriate for the original design.
• Termination and Mounting: Solder lug termination and panel mount configuration are required for mechanical and electrical compatibility.
• Rotation and Turn Count: The 300° rotation and 1-turn specification define the mechanical adjustment range and must be preserved.

The RLS2K25E from Ohmite meets these substitution criteria with a 2.25k Ohm resistance value (within tolerance band), 150W power rating (exceeding minimum requirement), wirewound construction, solder lug termination, and panel mount configuration.

Parameter Comparison

Engineering Selection Recommendations

The RLS2K25E is the designated manufacturer-recommended substitute for the RT100AS2201KB. Selection of this alternative is supported by the following factors:

• Product Status: The RT100AS2201KB is obsolete, while the RLS2K25E maintains active production status, ensuring long-term availability and supply chain continuity.
• Compliance: The RLS2K25E is RoHS3 compliant, meeting current environmental and regulatory standards for electronic component manufacturing.
• Performance Margin: The RLS2K25E provides a 50% increase in power rating (150W versus 100W), offering enhanced thermal headroom and operational reliability in high-dissipation applications.
• Electrical Equivalence: The 2.25k Ohm resistance value falls within the ±10% tolerance band of the original 2.2k Ohm specification, maintaining circuit performance within design parameters.

Frequently Asked Questions (FAQ)

Q: Can the RLS2K25E be used as a direct replacement for the RT100AS2201KB?

A: Yes. The RLS2K25E meets all critical substitution parameters: resistance value within tolerance band, equal or greater power rating, identical wirewound construction, matching termination style, and equivalent mechanical configuration for panel mount applications.

Q: What is the resistance tolerance band for the RT100AS2201KB?

A: With a nominal value of 2.2k Ohms and ±10% tolerance, the functional range is 1.98k to 2.42k Ohms. The RLS2K25E at 2.25k Ohms operates within this band.

Q: Does the higher power rating of the RLS2K25E affect circuit operation?

A: No. Power rating is a thermal specification indicating maximum safe dissipation. A higher rating does not alter electrical performance; it provides additional thermal margin and extends component lifespan under load.

Q: Are there packaging differences between these components?

A: The RT100AS2201KB is specified as obsolete with packaging details not fully documented. The RLS2K25E is supplied in bulk packaging. Both components feature identical panel mount mechanical interfaces and solder lug termination.

Q: What is the actuator configuration difference?

A: The RT100AS2201KB features a round actuator (0.236" diameter), while the RLS2K25E uses a flatted actuator (0.250" diameter). Both are compatible with standard panel mount potentiometer shafts and adjustment mechanisms.