RT500AS1001KB Equivalent & Substitute Parts

Part Overview

The RT500AS1001KB is a 1k Ohm 500W wirewound linear panel mount potentiometer manufactured by Vishay Sfernice. This component is classified as obsolete, making it necessary to identify active equivalent parts for ongoing applications and new designs. The RT500AS1001KB features a round actuator with solder turret termination and is designed for high-power applications requiring precise linear resistance adjustment.

Substiute Parts

RT500AS1001KB

Vishay SferniceIn Stock: 1160RT500AS1001KB Datasheet

Current PartRFQ

RRS1K0E

OhmiteIn Stock: 1118RRS1K0E Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the RT500AS1001KB is based on the following critical parameters that must remain constant:

• Resistance value: 1k Ohm
• Power rating: 500W
• Taper characteristic: Linear
• Number of turns: 1
• Resistive material: Wirewound
• Mounting configuration: Panel Mount
• Tolerance: ±10%

The RRS1K0E from Ohmite meets all mandatory electrical and mechanical substitution criteria. Both parts share identical resistance, power rating, taper, turn count, material composition, and mounting type. Variations in rotation angle (300° vs 325°), actuator geometry, body diameter, and termination style (solder turret vs solder lug) do not prevent functional equivalence in applications where the core electrical parameters are the controlling factors.

Parameter Comparison

Engineering Selection Recommendations

The RRS1K0E is the qualified substitute for the RT500AS1001KB. The RRS1K0E maintains active product status with ROHS3 compliance, ensuring availability and regulatory alignment for new designs and production continuity. The electrical performance parameters—resistance, power rating, tolerance, and taper—are identical between both parts, establishing functional equivalence for circuit operation.

Physical differences in actuator geometry, body diameter, and termination style require mechanical design verification to confirm fit within existing panel mount installations and PCB layouts. The increased rotation angle (325° vs 300°) provides additional adjustment range and does not create a compatibility constraint.

Frequently Asked Questions (FAQ)

Q: Can the RRS1K0E directly replace the RT500AS1001KB in existing applications?

A: The RRS1K0E is electrically equivalent and functionally interchangeable for circuit operation. Mechanical integration must be verified, as the RRS1K0E has a larger body diameter (8.000" vs 5.630"), different actuator type (flatted vs round), and different termination style (solder lug vs solder turret). Panel mount hole spacing and PCB layout compatibility must be confirmed before implementation.

Q: What is the significance of the product status difference?

A: The RT500AS1001KB is obsolete, meaning Vishay Sfernice no longer manufactures or supports this component. The RRS1K0E is active, ensuring ongoing availability, technical support, and compliance with current regulatory standards. For new designs and production orders, the active RRS1K0E is the appropriate selection.

Q: Are there differences in rotation angle that affect circuit performance?

A: The RRS1K0E provides 325° rotation compared to 300° for the RT500AS1001KB. This additional range does not degrade performance and may provide finer adjustment capability in applications requiring precise resistance tuning. The linear taper characteristic remains identical.

Q: What termination differences exist between these parts?

A: The RT500AS1001KB uses solder turret termination, while the RRS1K0E uses solder lug termination. Both are suitable for PCB mounting and high-power applications. The specific termination method must be compatible with the circuit board design and soldering process used in your assembly.