| Image | Part Number | Description / PDF | Quantity | Rfq |
|---|---|---|---|---|
 |
J.W. Miller / Bourns |
ADJUSTABLE INDUCTOR 70NH TH |
0 |
|
 |
J.W. Miller / Bourns |
ADJUSTABLE INDUCTOR 148NH TH |
0 |
|
 |
J.W. Miller / Bourns |
ADJUSTABLE INDUCTOR 15MH TH |
0 |
|
 |
J.W. Miller / Bourns |
ADJUSTABLE INDUCTOR 460NH TH |
0 |
|
 |
J.W. Miller / Bourns |
ADJUSTABLE INDUCTOR 286NH TH |
0 |
|
 |
J.W. Miller / Bourns |
ADJUSTABLE INDUCTOR 238NH TH |
0 |
|
 |
J.W. Miller / Bourns |
ADJUSTABLE INDUCTOR 41NH TH |
0 |
|
 |
J.W. Miller / Bourns |
ADJUSTABLE INDUCTOR 193NH TH |
0 |
|
 |
J.W. Miller / Bourns |
ADJUSTABLE INDUCTOR 103NH TH |
0 |
|
 |
J.W. Miller / Bourns |
ADJUSTABLE INDUCTOR 339NH TH |
0 |
|
 |
J.W. Miller / Bourns |
ADJUSTABLE INDUCTOR 390NH TH |
0 |
|
 |
J.W. Miller / Bourns |
ADJUSTABLE INDUCTOR 37NH TH |
0 |
|
|
J.W. Miller / Bourns |
ADJUSTABLE INDUCTOR 296NH TH |
0 |
|
|
J.W. Miller / Bourns |
ADJUSTABLE INDUCTOR 150NH TH |
0 |
|
|
J.W. Miller / Bourns |
ADJUSTABLE INDUCTOR 86NH TH |
0 |
|
|
J.W. Miller / Bourns |
ADJUSTABLE INDUCTOR 335NH TH |
0 |
|
|
J.W. Miller / Bourns |
ADJUSTABLE INDUCTOR 184NH TH |
0 |
|
|
J.W. Miller / Bourns |
ADJUSTABLE INDUCTOR 117NH TH |
0 |
|
|
J.W. Miller / Bourns |
ADJUSTABLE INDUCTOR 258NH TH |
0 |
|
|
J.W. Miller / Bourns |
ADJUSTABLE INDUCTOR 226NH TH |
0 |
|
Adjustable inductors are electromagnetic components with variable inductance values, enabling precise control of current and voltage in electronic circuits. Unlike fixed inductors, these components incorporate mechanical or electronic adjustment mechanisms to modify their magnetic properties. They play critical roles in RF tuning circuits, power supply regulation, and signal processing systems, offering flexibility in modern electronics such as communication devices, automotive electronics, and industrial control systems.
| Type | Functional Characteristics | Application Examples |
|---|---|---|
| Variable Inductors | Mechanically adjustable magnetic cores | Radio frequency tuning circuits |
| Digitally Controlled Inductors | Programmable inductance via IC interfaces | Smart power supplies |
| Magnetically Adjustable Inductors | External magnetic field control | Industrial motor drives |
| Step-Tunable Inductors | Discrete inductance level selection | Telecom infrastructure equipment |
Typical adjustable inductors consist of: - Bobbin-wound copper coils with enamel insulation - Adjustable magnetic cores (ferrite, powdered iron, or amorphous alloys) - Mechanical adjustment mechanisms (screw actuators or rotary knobs) - Shielded enclosures for EMI reduction - Termination options (SMD pads or through-hole leads) The core movement mechanism enables inductance variation by altering magnetic flux paths, with precision tolerances down to 1%.
| Parameter | Description | Importance |
|---|---|---|
| Inductance Range | Adjustable value span (e.g., 1-100 H) | Determines application flexibility |
| Q Factor | Quality factor (50-300 typical range) | Affects frequency selectivity |
| Rated Current | Max DC/AC current capacity | Prevents saturation failure |
| Temperature Stability | 0.05%/ C typical drift | Ensures performance consistency |
Primary applications include: - Telecommunications: 5G base stations, software-defined radios - Automotive: EV charging systems, ADAS sensors - Industrial: Smart grid controllers, motor drives - Consumer Electronics: Wireless chargers, audio filters - Medical: MRI scanner gradient coils, implantable devices
| Manufacturer | Product Series | Key Features |
|---|---|---|
| Coilcraft | X2XX Adjustable Inductors | 100 nH-10 H range, 18 GHz bandwidth |
| TDK | EFM Series | Automotive-grade, AEC-Q200 compliant |
| Bourns | 434 Series | PCB-mount, 1-100 MHz operation |
| API Delevan | 7000 Series | High-precision ( 0.5%) military-grade |
Key considerations: - Required inductance range and adjustment resolution - Operating frequency vs. Q factor requirements - Current rating with safety derating margin - Environmental conditions (temperature, vibration) - Mounting compatibility (SMD vs. through-hole) Application Case: In RF filter design, select high-Q ( 150) inductors with sub-nH precision to meet 2.4 GHz ISM band requirements.
Current development trends include: - Miniaturization through advanced magnetic materials - Integration with sensor networks for smart systems - Digital control interfaces (I2C/PWM compatibility) - Increased power density for EV applications - Enhanced temperature stability (-55 C to +155 C operation)