RT100AS68R0KB Equivalent & Substitute Parts

Part Overview

The RT100AS68R0KB is a 68 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

RT100AS68R0KB

Vishay SferniceIn Stock: 808RT100AS68R0KB Datasheet

Current PartRFQ

RKS75RE

OhmiteIn Stock: 1167RKS75RE Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The RKS75RE from Ohmite qualifies as a substitute based on the following alignment of critical parameters:

• Power Rating: Both parts are rated at 100W, meeting thermal dissipation requirements
• Resistive Material: Both utilize wirewound construction, ensuring comparable frequency response and stability characteristics
• Termination Style: Both feature solder lug termination, maintaining electrical connection compatibility
• Mounting Type: Both are panel mount configurations
• Number of Turns: Both are single-turn potentiometers
• Rotation: Both provide 300° rotation
• Tolerance: Both maintain ±10% tolerance specification

The resistance value differs (75 Ohms vs. 68 Ohms), representing a 10.3% variance within the combined tolerance stack of both components. This substitution is valid where circuit design permits operation within this resistance range.

Parameter Comparison

Engineering Selection Recommendations

The RKS75RE is the designated manufacturer-recommended substitute for the RT100AS68R0KB. Selection of this alternative is supported by:

• Product Status: The RKS75RE maintains active production status, ensuring long-term availability and supply chain continuity
• Regulatory Compliance: The RKS75RE is ROHS3 compliant, meeting current environmental and material restriction requirements
• Functional Equivalence: All critical electrical and mechanical parameters align within acceptable engineering tolerances

Applications requiring the exact 68 Ohm specification must evaluate whether the 75 Ohm alternative meets circuit performance requirements, accounting for the 10.3% resistance increase within the ±10% tolerance band of both components.

Frequently Asked Questions (FAQ)

Q: Can the RKS75RE directly replace the RT100AS68R0KB in existing assemblies?

A: Direct mechanical and electrical replacement is possible. The solder lug termination, panel mount configuration, and 100W power rating are identical. Circuit performance must be evaluated for the 75 Ohm resistance value, which represents a 10.3% increase from the original 68 Ohm specification.

Q: What is the significance of the resistance difference between these parts?

A: The 7 Ohm difference (68 to 75 Ohms) falls within the combined tolerance stack of both components (±10% each). In applications where precise resistance is critical, this variance must be assessed against circuit design margins and performance specifications.

Q: Why is the RT100AS68R0KB classified as obsolete?

A: Obsolete status indicates the manufacturer has discontinued production. The RKS75RE provides functional continuity for applications requiring 100W wirewound potentiometers with panel mount configuration and solder lug termination.

Q: Are there packaging differences between these parts?

A: The RT100AS68R0KB packaging specification is not provided. The RKS75RE is supplied in bulk packaging. Packaging requirements should be confirmed based on assembly and procurement processes.

Q: Does the RKS75RE meet current regulatory requirements?

A: Yes, the RKS75RE is ROHS3 compliant, meeting current environmental and material restriction directives applicable to electronic components.