3309P-1-503

Series:	Trimpot® 3309 - Open Frame
Packaging:	Bulk
Lead Free Status / RoHS Status:	--
Part Status:	Active
Moisture Sensitivity Level (MSL):	--
Resistance:	50 kOhms
Power (Watts):	0.5W, 1/2W
Tolerance:	±25%
Temperature Coefficient:	±250ppm/°C
Number of Turns:	1
Adjustment Type:	Top Adjustment
Resistive Material:	Cermet
Mounting Type:	Through Hole
Termination Style:	PC Pins
Size / Dimension:	Rectangular - 0.453" x 0.354" Face x 0.250" H (11.50mm x 9.00mm x 6.35mm)

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Trimmer Potentiometers

Trimmer Potentiometers are commonly used for the precise setting of electrical values, such as voltage, current and resistance. The 3309P-1-503 is a popular type of adjustable potentiometer that can be used in a wide range of applications. In this article, we will discuss the application field and working principle of the 3309P-1-503.

Application Field of 3309P-1-503

The 3309P-1-503 trimmer potentiometer is a multi-turn, single-pole, constant-resistance trimmer potentiometer. It is primarily used for low-signal level, precision applications. For example, it is commonly employed in radio- and audio-frequency feedback circuits, in medical instruments, in audio amplifiers, and in satellite antennas. It is also often used as a voltage regulator for precision power supplies. In addition, it can be used as a sensor, variable resistor, current-limiting resistor, or voltage divider.

Working Principle of 3309P-1-503

The 3309P-1-503 trimmer potentiometer consists of a resistive element, a shaft, and a spindle drive mechanism. The resistive element is typically composed of a small cylindrical ceramic core with a resistive strip deposited on the surface. As the drive shaft is rotated, the spindle mechanism moves the core element up and down along the resistive strip to vary the amount of resistance in the circuit. The drive shaft is typically adjusted using a flat-blade screwdriver.The 3309P-1-503 offers high precision, high stability, and high temperature stability. Its typical mechanical lifetime is 500,000 turns, and its rated temperature range is -20°C~85°C. Additionally, its total resistance values range from 1ohm to 100Kohm, and its temperature coefficient is typically in the range of ±50ppm/°C.

Conclusion

The 3309P-1-503 is a highly precise and stable trimmer potentiometer used in a variety of applications, including radio- and audio-frequency feedback circuits, medical instruments, audio amplifiers, satellite antennas, voltage regulators, and sensors. Its resistive element consists of a small cylindrical ceramic core with a resistive strip deposited on the surface, and its resistance can be adjusted by rotating the drive shaft and moving the core element up and down along the resistive strip. It offers a reliable and highly accurate solution for a wide variety of applications.

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