3386S-1-801

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Trimmer Potentiometers are small, highly reliable and versatile units used to adjust, calibrate, and set operational voltage in a wide range of industrial and consumer applications. They are widely used to provide precise adjustments of electrical signals in a variety of devices, including radios, video players, controls, and thermistors. This article will examine the 3386S-1-801 application field and working principle.

Applications of the 3386S-1-801 Trimmer Potentiometer

The 3386S-1-801 trimmer potentiometer is an ultra-low profile, single-turn, high-reliability trimmer adjustable in resistance. It is particularly suitable for use in environments such as aircraft, marine, medical, and industrial equipment where its superior reliability and low profile make it ideal for applications where space is at a premium. In addition, its unique construction makes it resistant to shock, vibration, moisture, and extreme temperatures. It is useful in a wide range of applications including:

• Electrical instrumentation and test equipment;
• High-reliability in-circuit adjustments;
• Industrial control applications;
• Oscillator circuits;
• Transistor biasing;
• Timing circuits;
• Level and frequency shift applications;
• Telecommunications equipment; and
• Medical instrumentation.

Working Principle of the 3386S-1-801 Trimmer Potentiometer

The 3386S-1-801 Trimmer Potentiometer is composed of an axial, sealed photoceramic terminal and a sliding contact-block. As shown in Fig. 1, two end terminals are connected to an external supply, while a wiper terminal is connected to a load and forms a voltage divider with the two end terminals.

The extension part of the terminal is threaded and screwed into the body of the trimmer potentiometer. A rectangular plate, mounted on the terminal, is provided with laser-etched grooves, which define its continuous adjustment range. This plate is made of a special alloy that offers excellent corrosion resistance and excellent contact resistance. This plate prevents the terminal from deforming or slipping during the adjustment operation, which allows for precise adjustment of the position of the wiper terminal.

The 3386S-1-801 Trimmer Potentiometer is designed to be adjustable only while the circuit is powered off, helping to prevent any accidental misadjustment of the trimmer that might occur during use. It also features an additional seal on the terminal shaft, which ensures a tight connection and further prevents any moisture from entering and affecting the performance of the device.

The 3386S-1-801 Trimmer Potentiometer uses a sealed photoceramic terminal that ensures excellent vibration and shock resistance. This terminal, along with the sliding contact-block, also gives the device its superior long-term reliability and stability.

Conclusion

As an ultra-low profile, single-turn, high-reliability trimmer adjustable in resistance, the 3386S-1-801 Trimmer Potentiometer is particularly suitable for use in aircraft, marine, medical, and industrial equipment. It is an ideal device for applications where space is at a premium, and its superior vibration, shock, and temperature resistance make it very reliable. The 3386S-1-801 Trimmer Potentiometer offers excellent corrosion resistance and contact reliability and is adjustable only while the circuit is powered off, making it a very safe and reliable device.

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