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Diodes - Variable Capacitance (Varicaps, Varactors)
Diodes - Variable Capacitance (Varicaps, Varactors)

Diodes - Variable Capacitance (Varicaps, Varactors) - Category Overview

Definition & Functionality
Variable capacitance diodes, commonly known as varicaps or varactors, are specialized semiconductor devices designed to function as voltage-controlled capacitors. These diodes exploit the inherent capacitance variation across their PN junction when reverse-biased, enabling precise tuning of resonant circuits in RF applications. Unlike standard diodes, varactors prioritize capacitive reactance over rectification, making them essential in frequency modulation, phase-locked loops (PLLs), and voltage-controlled oscillators (VCOs).

Product Types & Key Variations
This category encompasses multiple varactor diode configurations, including:
- Abrubt Junction Varactors: Optimized for high-Q, low-loss performance in microwave systems.
- Hyperabrubt Varactors: Deliver steeper capacitance-voltage (C-V) curves for wide-tuning-range applications like TV tuners.
- GaAs Varactors: Offer superior high-frequency stability in 5G and millimeter-wave designs.
- Silicon Tuning Diodes: Cost-effective solutions for consumer electronics and industrial RF circuits.

Selection Guidelines
When sourcing varicap diodes, consider these critical parameters:
1. Capacitance Range (Cj): Match the diode s min/max Cj to your tuning requirements (e.g., 2 20pF for VCOs).
2. Q Factor: Select high-Q (>100) variants for low-noise oscillator designs.
3. Voltage Sensitivity (C-V Slope): Hyperabrupt types provide wider tuning per volt (e.g., 1:4 ratio).
4. Package Type: SOT-23 for compact PCBs; ceramic packages for high-power RF.

Why Choose This Category?
Varactors bridge analog tuning and digital control, reducing system complexity in modern RF architectures. Their compatibility with automated tuning algorithms makes them indispensable for 5G base stations, satellite transceivers, and IoT connectivity modules. For engineers prioritizing frequency agility, this category delivers proven performance with parametric precision.

Found 1160 items

MA46483-186

DIODE,VARACTOR,HYPER,DUAL,STRIPL


MAVR-000401-0287FT

VARACTOR,PLASTIC,CK,LEAD-FREE,SO


HVC316TRU-E

VARIABLE CAPACITANCE DIODE


BB639E7904HTSA1

DIODE VAR CAP 30V 20MA SOD-323


HVU363ATRU-E

VARIABLE CAPACITANCE DIODE


SMV1263-079LF

DIODE VARACTOR 15V 20MA SC-79


SMV1232-011LF

SOD 323 N-TYPE SINGLE LEAD FREE


1SV281(TPH3,F)

DIODE VCO V/UHF 10V ESC


1SV270TPH3F

DIODE VARICAP VCO UHF USC


MAVR-000081-0287AT

VARACTOR, PLASTIC, LEAD-FREE


SMV2204-040LF

DIODE VARACTOR


SMV1213-079LF

DIODE VARACTOR


SVC720-TL-E

FM VARICAP TWIN VR 4V


KVX3901A-23-4

SI TVAR NON HERMETIC PLASTIC SMT


BB131,135

DIODE VHF VAR CAP 30V SOD323


SVC203SPA

VARIABLE CAPACITANCE DIODE


BB914

BB914 - VARACTOR DIODE


BB187,115

DIODE VHF VAR CAP 32V SOD523


SMV2026-040LF

DIODE VARACTOR


MA46H072-1056

DIODE, VARACTOR, GAAS


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