RT100AL47R0KB Equivalent & Substitute Parts

Part Overview

The RT100AL47R0KB 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 essential for ongoing system maintenance, repair, and new design implementations where this specification remains applicable.

Substiute Parts

RT100AL47R0KB

Vishay SferniceIn Stock: 687RT100AL47R0KB 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, meeting thermal and electrical load requirements
• Resistive Technology Match: Both utilize wirewound construction, ensuring comparable frequency response and stability characteristics
• Mechanical Interface Compatibility: Both feature panel mount configuration with solder lug termination, enabling direct mechanical installation
• Adjustment Mechanism Match: Both provide 1-turn, 300° rotation adjustment with user-defined positioning
• Tolerance Alignment: Both maintain ±10% resistance tolerance, suitable for applications where this specification is acceptable

The resistance value difference (47 Ohms vs. 50 Ohms) falls within the specified tolerance band and represents a 6.4% variance, which is acceptable for potentiometer substitution in most circuit applications where the RT100AL47R0KB was originally specified.

Parameter Comparison

Engineering Selection Recommendations

The RKS50RE represents the primary substitute for the obsolete RT100AL47R0KB. Selection of this alternative is supported by:

• Product Availability: The RKS50RE maintains active production status with 1201 units in current inventory, ensuring supply chain continuity
• Regulatory Compliance: The RKS50RE carries ROHS3 certification, meeting modern environmental and material restriction requirements
• Functional Equivalence: Matching power rating, resistive technology, mechanical interface, and adjustment characteristics enable direct substitution in existing circuit designs
• Resistance Tolerance: The 3-Ohm difference between 47 Ohms and 50 Ohms remains within acceptable variance for potentiometer applications utilizing ±10% tolerance components

Frequently Asked Questions (FAQ)

Q: Can the RKS50RE be directly substituted for the RT100AL47R0KB in existing designs?

A: Yes. Both components share identical power ratings (100W), resistive technology (wirewound), mechanical mounting (panel mount), termination method (solder lug), and adjustment characteristics (1-turn, 300° rotation). The 3-Ohm resistance difference falls within the ±10% tolerance specification applicable to both parts.

Q: What is the significance of the resistance value difference between 47 Ohms and 50 Ohms?

A: The difference represents a 6.4% variance. Since both components are specified with ±10% tolerance, this variance is within acceptable substitution parameters for potentiometer applications. Circuit designs utilizing the RT100AL47R0KB with tolerance margins can accommodate the RKS50RE without functional degradation.

Q: Does the RKS50RE meet current regulatory requirements?

A: Yes. The RKS50RE carries ROHS3 compliance certification, meeting current environmental and material restriction standards. The original RT100AL47R0KB does not specify RoHS status, making the RKS50RE suitable for applications requiring modern regulatory compliance.

Q: Are there mechanical differences between these components?

A: Both components feature panel mount configuration with solder lug termination. Minor dimensional variations exist in actuator length (0.984" vs. 0.875") and diameter (0.236" vs. 0.250"), but these do not prevent mechanical substitution in standard panel mount applications. Verify mounting hole spacing and actuator clearance in your specific mechanical design.

Q: What is the inventory status of the substitute part?

A: The RKS50RE is actively produced with 1201 units in current stock, ensuring reliable supply availability for immediate procurement and future reorders.