The ST-4ETA 500K OHM(504) is a trimmer potentiometer manufactured by Copal Electronics Inc. This adjustable resistor is used for fine-tuning circuits, with a specified resistance of 500 kilo-ohms. The '(504)' probably is a manufacturing code or date code and unimportant for the basic function. The ST-4ETA series is known for being small and enclosed.

Applications:

• Calibration of sensors in industrial automation
• Voltage adjustment in power supplies
• Gain control in audio amplifiers
• Frequency trimming in oscillators
• Setting reference voltages in analog circuits

Features:

• Compact size for dense PCB layouts
• Enclosed design for protection against dust and contaminants
• Single-turn adjustment for simple tuning
• Stable resistance value over temperature and time
• 500k Ohm resistance value

Benefits:

• Enables precise calibration of electronic circuits
• Improves the accuracy of analog measurements
• Reduces the need for expensive precision resistors
• Simplifies circuit design and adjustment processes
• Allows for fine-tuning to compensate for component tolerances

Additional Details:

The ST-4ETA 500K OHM(504) likely employs a cermet resistive element, providing good stability. Adjustment is achieved via a small screw. Datasheets from Copal Electronics offer further data, including tolerance, power rating, temperature coefficient, and mechanical details. Consider operating temperature, adjustment resolution needs, and required stability when employing this component. Proper soldering techniques are essential for reliable connection. The series may have slightly varied pinouts, consult the correct datasheet.