RT100AS4R70KB Equivalent & Substitute Parts

Part Overview

The RT100AS4R70KB is a 4.7 Ohm, 100W wirewound potentiometer manufactured by Vishay Sfernice, designed for panel mount applications with solder lug termination. This component is classified as obsolete, making identification of suitable substitute parts essential for ongoing system maintenance and new design implementations. The 1-turn, 300° rotation design with round actuator configuration serves applications requiring precision resistive adjustment in high-power environments.

Substiute Parts

RT100AS4R70KB

Vishay SferniceIn Stock: 835RT100AS4R70KB Datasheet

Current PartRFQ

RKS5R0E

OhmiteIn Stock: 723RKS5R0E Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the RT100AS4R70KB is determined by the following critical parameters:

• Power Rating: 100W minimum requirement
• Resistive Material: Wirewound construction for thermal stability
• Termination Style: Solder lug for direct circuit integration
• Mounting Type: Panel mount configuration
• Rotation Angle: 300° mechanical range
• Number of Turns: Single-turn adjustment
• Tolerance: ±10% resistance tolerance

The substitute part RKS5R0E from Ohmite meets these core electrical and mechanical requirements. The resistance value differs by 0.3 Ohms (5 Ohm vs. 4.7 Ohm), representing a 6.4% variance within the ±10% tolerance band of both components, allowing functional equivalence in applications where exact resistance matching is not critical.

Parameter Comparison

Engineering Selection Recommendations

The RKS5R0E serves as a direct functional substitute for the obsolete RT100AS4R70KB based on the following criteria:

Product Status: The RT100AS4R70KB is obsolete, while the RKS5R0E is active production. Selection of the active component ensures long-term availability and supply chain continuity.

Electrical Equivalence: Both components share identical power ratings (100W), turn count (1), and tolerance specifications (±10%). The 0.3 Ohm resistance differential falls within the combined tolerance band, permitting direct substitution in circuits where the nominal 4.7 Ohm value is not a critical design constraint.

Mechanical Compatibility: Both potentiometers feature panel mount configuration, solder lug termination, 300° rotation, and wirewound construction, ensuring physical and electrical interface compatibility.

Compliance: The RKS5R0E carries ROHS3 compliance certification, meeting current regulatory requirements for electronic component procurement.

Frequently Asked Questions (FAQ)

Q: Can the RKS5R0E replace the RT100AS4R70KB in all applications?

A: The RKS5R0E is functionally equivalent for applications where the 4.7 Ohm nominal value is not a critical design parameter. The 0.3 Ohm difference (6.4% variance) falls within the ±10% tolerance specification of both components. Applications requiring exact 4.7 Ohm resistance should evaluate circuit sensitivity to this variance.

Q: What are the key differences between these two potentiometers?

A: The primary differences are manufacturer (Vishay Sfernice vs. Ohmite), product status (obsolete vs. active), and nominal resistance value (4.7 Ohm vs. 5 Ohm). All other electrical and mechanical parameters are equivalent.

Q: Does the RKS5R0E meet current compliance standards?

A: Yes, the RKS5R0E is ROHS3 compliant, meeting current regulatory requirements for electronic component procurement and environmental compliance.

Q: Are the physical dimensions compatible for panel mount installation?

A: Both components are panel mount potentiometers with solder lug termination. The RKS5R0E features a round body with 3.125" diameter and flatted actuator, while the RT100AS4R70KB uses a round actuator. Verify mechanical fit within your specific panel cutout and actuator interface requirements.

Q: What is the inventory status of these components?

A: The RT100AS4R70KB has 728 pieces in stock (obsolete status). The RKS5R0E has 707 pieces in stock and is active production, ensuring continued availability for future procurement.