CTZ3E-10A-W5-PF vs CTZ3E-10A-W1
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| Category | Trimmers, Variable Capacitors | Trimmers, Variable Capacitors |
| Manufacturer | KYOCERA AVX | KYOCERA AVX |
| Description | CAP TRIMMER 2.5-10PF 25V SMD | CAP TRIMMER 2.5-10PF 25V SMD |
| Package | Tape & Reel (TR) | Tape & Reel (TR) |
| Series | CTZ, Kyocera | CTZ, Kyocera |
| Features | Low Profile | Low Profile |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 85°C |
| Mounting Type | Surface Mount | Surface Mount |
| Size / Dimension | 0.177" L x 0.126" W (4.50mm x 3.20mm) | 0.177" L x 0.126" W (4.50mm x 3.20mm) |
| Voltage - Rated | 25 V | 25 V |
| Height - Seated (Max) | 0.071\" (1.80mm) | 0.071\" (1.80mm) |
| Dielectric Material | Ceramic | Ceramic |
| Capacitance Range | 2.5 ~ 10pF | 2.5 ~ 10pF |
| Adjustment Type | Top | Top |
| Q @ Freq | 300 @ 1MHz | 300 @ 1MHz |
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1. What is a variable capacitor or fine-tuning capacitor?
A variable capacitor is a capacitor whose capacitance can be adjusted within a certain range. Its working principle is to change the capacitance of the capacitor by changing the relative effective area or distance between the pole pieces. It is usually used as a tuning capacitor in radio receiving circuits.
Fine-tuning capacitors are actually a type of variable capacitor, but their capacitance variation range is small, usually only a few picofarads to tens of picofarads.
Application scenarios
Variable capacitors are widely used in radio receiving circuits as tuning capacitors, and are also used in various tuning and oscillation circuits, such as the tuning and compensation circuits of radios, televisions and other equipment. -
2. What does a variable capacitor do?
The main function of a variable capacitor is to adjust the capacitance value in a circuit. By changing the relative effective area or distance between the pole pieces, a variable capacitor can continuously adjust its capacitance within a certain range, thereby achieving adjustment and control of circuit parameters.
Application scenarios
Radio receiving circuit: Variable capacitors are often used in radio receiving circuits as tuning capacitors to help adjust the receiving frequency and ensure that the device can receive signals of a specific frequency.
Tuning amplifier and frequency-selective oscillator circuits: They are also widely used in tuning amplifiers and frequency-selective oscillators to help achieve frequency adjustment and signal processing of circuits.
NFC/RFID card readers: In devices such as NFC/RFID card readers, variable capacitors are used for tuning and compensation circuits to ensure the normal operation of the equipment. -
3. How to adjust the fine-tuning capacitor?
Fine-tuning capacitors are divided into mica fine-tuning capacitors, ceramic fine-tuning capacitors, film fine-tuning capacitors, wire fine-tuning capacitors, etc. It is often used as a compensation capacitor or correction capacitor in various tuning and oscillation circuits.
Capacitors whose capacitance can be adjusted within a small range and can be fixed to a certain capacitance value after adjustment are called fine-tuning capacitors, and semi-fine-tuning capacitors can also be seen. When adjusting, change the distance or area between the two pieces.
Fine-tuning capacitors are made of two pieces or two groups of small metal springs with a dielectric sandwiched between them. The appearance of a semi-adjustable capacitor. Semi-adjustable capacitors generally have no handles and can only be adjusted with a screwdriver, so they are often used in places where frequent adjustment is not required.
Semi-adjustable capacitors are used as compensation capacitors or correction capacitors in various tuning and oscillation circuits. -
4. What is the difference between fixed capacitors and variable capacitors?
The main difference between fixed capacitors and variable capacitors is whether the capacitance value can be changed. The capacitance value of fixed capacitors is fixed, while variable capacitors can change their capacitance value by manual adjustment.
Fixed capacitors
A fixed capacitor is a capacitor with a fixed capacitance value. Its basic structure is two conductive plates that are very close to each other, separated by an insulating medium such as air, paper or ceramic. Fixed capacitors are mainly used in circuits for power filtering, signal filtering, signal coupling, resonance, filtering, compensation, charging and discharging, energy storage and DC isolation. Common types of fixed capacitors include paper capacitors and electrolytic capacitors. Paper capacitors are made by sandwiching paper soaked in paraffin between two layers of lead foil and rolling them into a cylindrical shape; electrolytic capacitors use electrolysis to produce a very thin oxide insulating layer on the aluminum film as a dielectric, which has a large capacitance value, but the two poles have fixed polarity.
Variable capacitors
A variable capacitor is a capacitor whose capacitance can be continuously adjusted within a certain range. It is usually composed of a set of fixed plates and a set of moving plates, and the capacitance value is changed by changing the position of the moving plates. Variable capacitors are mainly used in circuits as tuning capacitors in radio receiving circuits. The capacitance value is changed by manually adjusting the position of the moving plates, thereby achieving circuit adjustment. Variable capacitors include fine-tuning capacitors, whose capacitance value can be slightly adjusted. They are usually made of two pieces or two groups of small metal springs with a dielectric sandwiched between them. When adjusting, the distance or area between the two pieces is changed.
