Bourns 51CAD-E28-A20 100k Ohm 1W Cermet Linear Potentiometer Equivalent & Substitute Parts

Part Overview

The Bourns 51CAD-E28-A20 is a 100k Ohm, 1 Watt cermet linear potentiometer designed for panel mount applications in pro audio equipment. This part is classified as obsolete, which necessitates identification of functionally equivalent alternatives for ongoing system maintenance and new designs. The substitute part maintains identical electrical and mechanical specifications while offering improved compliance status and active product availability.

Substiute Parts

51CAD-E28-A20

Bourns Inc.In Stock: 79951CAD-E28-A20 Datasheet

Current PartRFQ

51CAD-E28-A20L

Bourns Inc.In Stock: 100851CAD-E28-A20L Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The 51CAD-E28-A20L qualifies as a direct substitute based on identical electrical and mechanical parameters. Substitution criteria are determined by the following parameters:

• Resistance value: 100k Ohm
• Power rating: 1W
• Taper characteristic: Linear
• Number of gangs: 1
• Resistive material composition: Cermet
• Rotation angle: 290°
• Temperature coefficient: ±150ppm/°C
• Mounting configuration: Panel Mount
• Termination style: PC Pins
• Bushing thread specification: 1/4-32
• Physical body dimensions: Rectangular - 0.521" x 0.492" Face

All listed parameters match between the main part and substitute, confirming functional and mechanical interchangeability.

Parameter Comparison

Engineering Selection Recommendations

The 51CAD-E28-A20L is the direct substitute for the obsolete 51CAD-E28-A20. Selection of the substitute part is based on the following factors:

The original part 51CAD-E28-A20 carries obsolete product status, limiting long-term availability and supply chain reliability. The substitute 51CAD-E28-A20L maintains active product status, ensuring continued availability and manufacturing support.

The substitute part achieves ROHS3 compliance, whereas the original part is RoHS non-compliant. For applications subject to RoHS directives or customer requirements, the substitute part satisfies regulatory requirements.

The substitute part is REACH Affected, indicating compliance with REACH registration requirements. The original part is REACH Unaffected, which may present regulatory considerations depending on application jurisdiction and end-use classification.

All electrical and mechanical parameters remain identical between the two parts, confirming direct functional interchangeability without circuit or mechanical redesign.

Frequently Asked Questions (FAQ)

Q: Can the 51CAD-E28-A20L be used as a direct replacement for the 51CAD-E28-A20 in existing designs?

A: Yes. All electrical specifications, mechanical dimensions, and mounting configurations are identical. Direct substitution is possible without circuit modification or mechanical redesign.

Q: What is the primary reason for substituting the 51CAD-E28-A20?

A: The original part is classified as obsolete. The substitute part maintains active product status, ensuring reliable supply chain availability and manufacturing continuity.

Q: Are there compliance differences between these parts?

A: Yes. The 51CAD-E28-A20L is ROHS3 compliant and REACH Affected, whereas the 51CAD-E28-A20 is RoHS non-compliant and REACH Unaffected. For applications requiring RoHS or REACH compliance, the substitute part is required.

Q: Do the packaging formats differ?

A: Yes. The original part is supplied in bulk packaging, while the substitute part is supplied in tray packaging. Tray packaging provides improved handling and inventory management for production environments.

Q: Are the electrical performance characteristics identical?

A: Yes. Resistance value (100k Ohm), power rating (1W), tolerance (±10%), temperature coefficient (±150ppm/°C), taper (Linear), and all other electrical parameters are identical.

Q: Is the mechanical footprint the same?

A: Yes. Body dimensions, bushing thread specification (1/4-32), actuator dimensions, and all mounting parameters are identical. No mechanical redesign is required.