The Copal Electronics Inc. ST-32 series is a line of high-quality trimming potentiometers designed for precise resistance adjustment in electronic circuits. The ST-32 ETA 20K OHM(24) model is specifically a 20,000 ohm (20 kΩ) variant within this series, suitable for applications requiring fine-tuning within a higher resistance range.

Applications:

• Feedback control circuits: Used in operational amplifiers and control systems for gain and offset adjustments.
• Instrumentation: Employed in test and measurement equipment for calibration purposes.
• Sensor signal conditioning: Utilized to adjust the output of sensors to match desired signal levels.
• Audio circuits: Applied in equalizers and tone controls for frequency response shaping.
• Medical devices: Incorporated in medical equipment for precise parameter adjustments.

Features:

• High resolution: Provides fine and accurate resistance adjustments.
• Excellent stability: Maintains consistent resistance values over time and temperature.
• Sealed construction: Protects the internal resistive element from dust and moisture.
• Compact footprint: Space-saving design for use in densely populated circuit boards.
• Cermet element: Provides superior stability and long life.
• ETA Configuration: Specific lead configuration for mounting.
• 20k Ohm Resistance: Offers the specific needed resistance for targeted applications.

Benefits:

• Improved circuit performance: Enables precise adjustments, resulting in optimized circuit operation.
• Reduced maintenance: High stability minimizes the need for frequent recalibration.
• Increased reliability: Robust design ensures dependable performance in harsh environments.
• Simplified circuit design: Compact size allows for greater design flexibility.
• Extended lifespan: Durable construction ensures long-lasting performance.

Additional Details:

The ST-32 series potentiometers typically use a cermet resistive element, which offers excellent resistance to wear and tear and provides superior stability compared to carbon composition elements. The sealed construction enhances reliability by preventing the ingress of contaminants. The 20k ohm resistance value makes this model suitable for circuits where a higher resistance is required for voltage division or current limiting. The power rating of the ST-32 series is generally around 0.25W, and it is important to stay within this limit to avoid damage. The 'ETA' likely indicates the lead configuration, assisting in mounting to the PCB. The (24) likely corresponds to a manufacturing or date code.