Equivalent & Substitute Parts for RT100AS47R0KB

Part Overview

The RT100AS47R0KB is a 47 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 specific model is no longer available through standard distribution channels.

Substiute Parts

RT100AS47R0KB

Vishay SferniceIn Stock: 861RT100AS47R0KB Datasheet

Current PartRFQ

RKS50RE

OhmiteIn Stock: 1227RKS50RE Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The RKS50RE from Ohmite qualifies as a functional substitute based on the following critical parameters:

• Power Rating Match: Both components are rated for 100W continuous operation
• Resistive Technology: Both utilize wirewound construction for high-power applications
• Termination Compatibility: Both feature solder lug termination for direct circuit integration
• Mounting Configuration: Both are panel mount potentiometers with 1-turn adjustment
• Rotation Specification: Both provide 300° rotation range
• Tolerance Class: Both maintain ±10% resistance tolerance

The resistance value differs by 3 Ohms (47Ω vs 50Ω), which falls within acceptable substitution parameters for general-purpose potentiometer applications where the exact resistance value is not critical to circuit function or where minor adjustments to circuit tuning can accommodate this variance.

Parameter Comparison

Engineering Selection Recommendations

The RKS50RE represents the primary substitute for the obsolete RT100AS47R0KB based on electrical and mechanical parameter alignment. The substitute component is currently in active production status with confirmed inventory availability (1201 units), ensuring supply chain continuity. The RKS50RE carries ROHS3 compliance certification, meeting modern environmental and regulatory standards applicable to electronic component procurement. The 3 Ohm resistance differential (47Ω to 50Ω) is within typical tolerance ranges for potentiometer applications and does not present functional incompatibility for general-purpose adjustment circuits.

Frequently Asked Questions (FAQ)

Q: Can the RKS50RE directly replace the RT100AS47R0KB without circuit modification?

A: Yes, for applications where the potentiometer functions as a general-purpose adjustment element. The 3 Ohm resistance difference falls within the ±10% tolerance specification of both components. Applications requiring precise resistance values should verify circuit performance after substitution.

Q: What are the physical mounting differences between these components?

A: Both components feature panel mount configuration with solder lug termination. The RKS50RE has a bushing thread specification of 3/8-32 and a round body diameter of 3.125" (79.38mm). Verify mounting hole dimensions and panel cutout specifications in your application before installation.

Q: Why is the original RT100AS47R0KB classified as obsolete?

A: Obsolete status indicates the manufacturer has discontinued production. The RKS50RE from Ohmite provides equivalent electrical performance and is actively manufactured, making it suitable for replacement in new designs and maintenance applications.

Q: Are there compliance differences between the original and substitute components?

A: The RKS50RE carries ROHS3 compliance certification. The original RT100AS47R0KB does not list RoHS status in available documentation. For applications requiring specific environmental compliance, verify that the RKS50RE meets your regulatory requirements.

Q: What is the significance of the "Linear" taper specification on the RKS50RE?

A: The taper specification describes the resistance change curve relative to shaft rotation. The RKS50RE linear taper provides proportional resistance change across the full rotation range, suitable for general adjustment applications where linear response is required.