3386F-1-251LF

Series:	Trimpot® 3386 - Sealed
Packaging:	Tube
Lead Free Status / RoHS Status:	--
Part Status:	Active
Moisture Sensitivity Level (MSL):	--
Resistance:	250 Ohms
Power (Watts):	0.5W, 1/2W
Tolerance:	±10%
Temperature Coefficient:	±100ppm/°C
Number of Turns:	1
Adjustment Type:	Top Adjustment
Resistive Material:	Cermet
Mounting Type:	Through Hole
Termination Style:	PC Pins
Size / Dimension:	Square - 0.375" x 0.375" Face x 0.190" H (9.53mm x 9.53mm x 4.83mm)

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Introduction

Trimmer Potentiometers are a great choice for adjustable resistors. They are often used in circuits where customary fixed resistors are too difficult or costly to use because they require regular adjustment. The 3386F-1-251LF is a type of trimmer potentiometer that is specifically designed for tight spaces.

Application Field

The 3386F-1-251LF trimmer potentiometer has multiple applications including use as automatic gain control (AGC) circuits, DC bias controlled circuits, frequency control circuits, as well as low-frequency active filter circuits. They are also used to precisely control the voltage and current of a circuit, such as in radio and television receivers.They are especially useful when adjustments to circuitry needs to be made in tight spaces. These include applications in closed, non-ventilated enclosed areas where conditions can be extremely demanding. Such areas are often found in military and aerospace electronics, instrumentation, and medical equipment applications.

Working Principle

The 3386F-1-251LF trimmer potentiometer operates by providing a variable resistance to a circuit. This is done by a wiper arm which is used to adjust the resistance. The wiper arm is attached to a spring-loaded plunger. When the plunger is pushed, the arm moves away from the resistive element and resistance is reduced. When the plunger is pulled, the arm moves toward the resistive element and resistance is increased.Additionally, the trimmer potentiometer also has an adjustable stop, which sets the maximum resistance that the arm can achieve. This is usually set by using the adjusting screw that is present at the rear of the unit. This prevents the wiper arm from moving beyond a certain point and ensures that the resistance remains within the maximum limit of the device.

Conclusion

The 3386F-1-251LF trimmer potentiometer is an ideal component for applications where adjustments need to be made in confined spaces. Its adjustable stop feature also makes it a great choice for finely tuning resistances of circuits. The multiple applications of the 3386F-1-251LF gives it an even greater appeal, making it a favorite among both hobbyists and professional engineers.

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