The ST-4TA is a trimmer potentiometer manufactured by Copal Electronics Inc. It is a small, adjustable resistor commonly used for calibration and fine-tuning in electronic circuits. It's likely a single-turn trimmer, suitable for applications needing occasional adjustments.

Applications:

• Calibration of test and measurement equipment
• Adjusting voltage references in power supplies
• Setting the operating point of amplifiers
• Fine-tuning oscillators and filters
• Control of brightness and contrast in displays

Features:

• Compact size for space-saving designs
• Enclosed construction for environmental protection
• High resolution for precise adjustment
• Stable resistance value
• Available in various resistance ranges

Benefits:

• Allows for precise calibration of electronic circuits
• Improves the accuracy and stability of electronic devices
• Reduces the need for precision fixed resistors
• Simplifies manufacturing and maintenance processes
• Enables customization of circuit parameters

Additional Details:

The ST-4TA typically features a cermet resistive element for good stability and long life. It is adjusted by rotating a screw. The datasheet for the ST-4TA from Copal Electronics will provide specific details on the resistance range, tolerance, power rating, temperature coefficient, and mechanical dimensions. When selecting a trimmer potentiometer, consider the required resistance range, the desired adjustment resolution, and the environmental conditions. Proper soldering techniques are important for reliable performance. This series might have different pinout configurations, so consulting the datasheet is essential.