RT500AS22R0KB Equivalent & Substitute Parts

Part Overview

The RT500AS22R0KB is a 22 Ohm, 500W wirewound linear potentiometer manufactured by Vishay Sfernice, designed for panel mount applications with a 1-turn adjustment mechanism and solder turret 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

RT500AS22R0KB

Vishay SferniceIn Stock: 1193RT500AS22R0KB Datasheet

Current PartRFQ

RRS25RE

OhmiteIn Stock: 969RRS25RE Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The RRS25RE from Ohmite qualifies as a functional substitute based on the following critical parameters:

• Power Rating Match: Both components are rated at 500W, maintaining thermal and electrical load capacity
• Resistive Material Match: Both utilize wirewound construction, ensuring comparable frequency response and noise characteristics
• Taper Match: Both employ linear taper, providing identical adjustment response curves
• Mounting Configuration Match: Both are panel mount potentiometers with single-gang, 1-turn adjustment
• Tolerance Match: Both maintain ±10% resistance tolerance
• Termination Compatibility: Solder lug termination (RRS25RE) is functionally equivalent to solder turret (RT500AS22R0KB) for circuit integration

Resistance Variance: The RRS25RE specifies 25 Ohms versus the original 22 Ohms, representing a 3 Ohm difference within the ±10% tolerance band of the original specification, permitting substitution in applications where this variance is acceptable.

Parameter Comparison

Engineering Selection Recommendations

The RRS25RE represents the primary substitute for the obsolete RT500AS22R0KB based on electrical and mechanical parameter alignment. The transition from an obsolete to an active product status ensures continued component availability and supply chain reliability.

The RRS25RE carries ROHS3 compliance certification, meeting current environmental and regulatory standards for electronic component manufacturing. The original RT500AS22R0KB does not specify RoHS compliance status.

Physical differences exist in actuator geometry (round versus flatted) and rotation angle (300° versus 325°), which may require mechanical accommodation in existing panel layouts. Termination style variation (solder turret to solder lug) necessitates PCB footprint verification prior to implementation.

The 3 Ohm resistance increase (22 Ohm to 25 Ohm) falls within the ±10% tolerance specification and is acceptable for applications where this variance does not compromise circuit performance or system calibration requirements.

Frequently Asked Questions (FAQ)

Q: Can the RRS25RE directly replace the RT500AS22R0KB without circuit modification?

A: Electrical substitution is viable for applications where the 3 Ohm resistance variance (within ±10% tolerance) does not affect system performance. Mechanical accommodation may be required due to differences in actuator geometry, rotation angle, and body diameter (143.00mm versus 203.20mm).

Q: What is the significance of the resistance tolerance in substitution?

A: Both components maintain ±10% tolerance. The RRS25RE nominal value of 25 Ohms falls within the acceptable range of the original 22 Ohm specification (22 ± 2.2 Ohms = 19.8 to 24.2 Ohms). Applications requiring exact 22 Ohm performance should evaluate circuit sensitivity to this variance.

Q: How do termination style differences affect implementation?

A: Solder lug termination (RRS25RE) and solder turret termination (RT500AS22R0KB) both provide solderable connections suitable for PCB integration. PCB footprint design must accommodate the specific termination geometry of the selected component.

Q: What is the impact of the larger body diameter of the RRS25RE?

A: The RRS25RE body diameter is 203.20mm compared to 143.00mm for the RT500AS22R0KB. Panel cutout and mounting clearance verification is required to confirm mechanical fit within existing enclosure designs.

Q: Does the RRS25RE meet current regulatory requirements?

A: The RRS25RE carries ROHS3 compliance certification, meeting current environmental regulations. The obsolete RT500AS22R0KB does not specify compliance status, making the RRS25RE the preferred choice for new designs and systems requiring regulatory documentation.