ST7TB202

Series:	ST7
Packaging:	Tape & Reel (TR)
Lead Free Status / RoHS Status:	--
Part Status:	Obsolete
Moisture Sensitivity Level (MSL):	--
Resistance:	2 kOhms
Power (Watts):	0.25W, 1/4W
Tolerance:	±20%
Temperature Coefficient:	±100ppm/°C
Number of Turns:	3
Adjustment Type:	Top Adjustment
Resistive Material:	Cermet
Mounting Type:	Surface Mount
Termination Style:	Gull Wing
Size / Dimension:	Square - 0.252" x 0.240" Face x 0.134" H (6.40mm x 6.10mm x 3.40mm)

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Trimmer PotentiometersThe ST7TB202 is a trimmer potentiometer designed to provide an adjustable resistance-level across a range of values. The device is based on the ‘variable resistor’ principle, where a-fixed-level ohmic material is connected to two terminals and the resistance between them is actively varied.The shape and design of the ST7TB202 trimmer potentiometer allow it to be installed in confined spaces, making it an ideal choice for use in a variety of applications. Its adjustable resistance range makes it versatile for use in amplifier bias, frequency control, and other such applications where a stable variable resistance is required. The ST7TB202 delivers accurate and repeatable results.The ST7TB202 is a low-power version of the standard trimmer potentiometer, and is made to work reliably in conditions that require low-power amplifiers. It has been built to have low leakage current; and features a non-polarized circuit that will not cause any deleterious effect to the circuit when modified.To use the ST7TB202 trimmer potentiometer, the user clips the two bare-metal connections into the device’s two terminals. The user then varies the resistance using a flat-head screwdriver, and the adjustable resistance can be adjusted to suit the application. The trimmer potentiometer can also be adjusted using a potentiometer-based circuit if desired.The ST7TB202 trimmer potentiometer uses a combination of solid-state components, including a resistor, a SRFET (Switch-mode Reactive Field-Effect Transistor), and a diode. The diode allows current to flow through the device’s channels, while the SRFET acts as a switch to keep the current from flowing too quickly, ensuring that the device does not become over-stressed.The working principle of the ST7TB202 trimmer potentiometer is relatively simple. When the flat-head screwdriver is used to adjust the variable resistance, this causes the SRFET to change its state. Depending on the new state achieved, the current flowing through the device is reduced or increased, thereby adjusting the resistance. As the resistance level is adjusted, this also adjusts the output of the amplifier, which in turn results in an alteration of the signal parameter.The ST7TB202 trimmer potentiometer is a useful and versatile device, capable of being used in a variety of applications due to its combination of features. Its adjustability allows for a range of resistance values and current-modulation options, while its small size makes it suitable for use in cramped spaces. Furthermore, the device’s low-power version and non-polarized circuit further improve its applicability in a variety of settings.

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