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DZD 100.00
Inductors and Coils
30 results
Inductors and chokes for switching power supplies, filtering and DC-DC conversion: shielded or unshielded SMD models, radial, toroidal and common mode filters.
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30 results
478 available
DZD 35.00
DZD 60.00
DZD 30.00
DZD 30.00
22UN730691-06
Unshielded SMD Inductor PCD0403 (4.5x4x3.2mm) - 47uH
DZD 30.00
22UN730691-09
Unshielded SMD Inductor PCD0403 (4.5x4x3.2mm) - 22uH
DZD 30.00
DZD 30.00
22UN730691-12
Unshielded SMD Inductor PCD0403 (4.5x4x3.2mm) - 68uH
DZD 30.00
22UN730691-14
Unshielded SMD Inductor PCD0403 (4.5x4x3.2mm) - 33uH
DZD 30.00
DZD 30.00
6KG1P30682-02
Shielded SMD Inductor SLW6040S (6x6x4mm) - 10uH
DZD 35.00
DZD 120.00
22UN730691-03
Unshielded SMD Inductor PCD0403 (4.5x4x3.2mm) - 15uH
DZD 30.00
DZD 60.00
DZD 70.00
Choosing an inductor or choke
An inductor is chosen first on three values: inductance in µH or mH, the current it supports without saturating, and its series resistance. If the current exceeds the stated value, the core saturates, the inductance drops and the converter heats up or whistles. In a DC-DC circuit, the value is given by the regulator's datasheet: respect it, as well as the current margin.
- Shielded SMD (SDI103R, SDI104R, SLW6040S): the shielding contains the magnetic field, useful near an analog trace, a sensor or an antenna.
- Unshielded SMD (PCD0403, 4.5x4x3.2 mm): more compact and more economical, keep away from sensitive circuits.
- Radial through-hole (TDK EL0606RA, T50-270J): high values in mH for filtering, breadboard prototyping or repair.
- Toroidal and ferrite core (TBV-470M, SBCP-80HY, RD0810): good current/loss compromise for power stages.
- Common mode filter (UU1ØLFNP-B682): at the mains input or on a power line, against conducted noise.
Also check the tolerance (5 %, 10 %) and the height footprint. Other passives useful to a power stage can be found in the Components category.
Frequently asked questions
What is the difference between a shielded and an unshielded inductor?
The shielded version encloses the magnetic field within its housing, which limits interference with nearby circuits. The unshielded version radiates more but remains fine in a corner of the board, away from sensitive signals.
How do I know what maximum current to choose?
Pick an inductor whose saturation current exceeds the expected peak current in the circuit by at least 30 %. Below that, the inductance collapses under load and the converter's efficiency drops.
Can a choke be replaced with an approximate value?
Yes, to a certain extent: a slightly higher value reduces current ripple, a lower value increases it. Above all, keep the same package size, the same rated current and a comparable series resistance.
What is a common mode filter used for?
It blocks high-frequency noise that travels in the same direction on both conductors of a power line, without affecting the useful current. It is placed at the mains input or at a power supply input to reduce conducted interference.
Why do prices vary so much from one inductor to another?
The price depends on the core type, rated current, tolerance, shielding and brand. A small SMD signal inductor and a ferrite-core power inductor are not in the same category.