3224W-1-200E

Series:	Trimpot® 3224 - Sealed
Packaging:	Tape & Reel (TR)
Lead Free Status / RoHS Status:	--
Part Status:	Active
Moisture Sensitivity Level (MSL):	--
Resistance:	20 Ohms
Power (Watts):	0.25W, 1/4W
Tolerance:	±10%
Temperature Coefficient:	±100ppm/°C
Number of Turns:	12
Adjustment Type:	Top Adjustment
Resistive Material:	Cermet
Mounting Type:	Surface Mount
Termination Style:	J Lead
Size / Dimension:	Rectangular - 0.189" x 0.138" Face x 0.209" H (4.80mm x 3.50mm x 5.30mm)

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Introduction to Trimmer Potentiometers

Trimmer Potentiometers are variable resistors which are used to fine tune the transfer characteristics of a circuit. They are used in electrical circuits such as amplifiers, motors, and audio equipment. The 3224W-1-200E is one such trimmer potentiometer and this article discusses its applications and principles of operation.

Applications

The 3224W-1-200E is a single-turn trimmer potentiometer used for adjusting the gain of amplifiers, motors, and audio equipment. It is designed for use in low-resistance, high-power applications. It can also be used for fine-tuning the audio output of car radios and home hifi systems.

Design and Construction

The trimmer potentiometer consists of three layers of metallized polyester film with a copper-clad core. The top two layers are insulated by a black lacquer to protect them from dust and other environmental corrosion. The bottom layer is the resistance element, which is constructed of coils of metal placed across the length of the potentiometer. The coils are connected to the resistance element by a pair of external pins which can be adjusted to modify the resistance.

Working Principle

When the external pins are adjusted to change the resistance, the current passing through the coils is modified. This serves to adjust the gain of the amplifier, motor, or audio equipment. The resistive element of the potentiometer is adjustable from 0 Ω to 200 Ω. This allows for a wide range of adjustments and also allows for the potentiometer to be set to a predetermined value.

Conclusion

The 3224W-1-200E trimmer potentiometer is a single-turn variable resistor used to fine-tune the transfer characteristics of electrical circuits. Its three layered metallized polyester film design and external pins allow for a range of adjustments from 0 to 200 Ω. This makes it ideal for low-resistance, high-power applications such as amplifiers, motors, and audio equipment.

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