Package size and dimensions
Stated as length by width by height in millimetres. Height is often the binding constraint, and within one footprint the taller option usually carries more current.
Produits d’inductance
Molded Power Inductors
Molded construction encloses the winding in a magnetic compound, giving a self-shielded part with low audible noise and a soft saturation curve. The range runs from 4.4 by 4.2 millimetres up to 23.5 by 22, covering 0.1 to 150 microhenries and RMS currents to 70 amps.
Recherche et sélection de références
Trouver des références pour Molded Power Inductors
Le tableau utilise les fiches produits actuelles du site anglophone, les critères de sélection publiés et les liens vers les fichiers techniques propres à chaque référence.
* Colonnes Image et Référence figées · faites glisser horizontalement pour consulter toutes les caractéristiques
| Image | Fiche technique | Comparer | Téléchargements |
Dimensions du boîtier
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Dimensions (L×l×H)
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Valeur d’inductance
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DCR(mΩ)
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IRMS
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ISAT
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Échantillon |
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| Image | Référence | Fiche technique | Comparer | Téléchargements | Dimensions du boîtier | Dimensions (L×l×H) | Valeur d’inductance | DCR(mΩ) | IRMS | ISAT | Échantillon |
|---|---|---|---|---|---|---|---|---|---|---|---|
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WHYTP0320 series | SPEC | Série WHYTP | 3.4*3.2*1.8mm | 0.33-10uH | 21-422mΩ | 1.4-8A | 1.6-10A |
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By series
Molded inductor series by size band
Series split by footprint and height, which together set current capability and loss.
Comment sélectionner
Selecting a molded power inductor in four steps
Ripple sets the inductance; IRMS and ISAT set the size; height often decides.
- 01
Calculate the inductance
Derive it from input and output voltage, switching frequency and the ripple current you can accept. Then check the tolerance band at its worst corner.
- 02
Check both current ratings
IRMS caps the continuous current by temperature rise. ISAT caps the peak by inductance roll-off. Your design has to satisfy both, not the friendlier one.
- 03
Pick the size band
Larger footprints and taller bodies give lower DC resistance and higher current. Work back from the height clearance over the converter.
- 04
Verify on the board
Measure ripple, efficiency and the inductor's temperature at full load in the real enclosure, then confirm at the highest rated ambient.
Parameters
Reading molded inductor ratings
IRMS and ISAT are defined differently and both have to be satisfied.
Inductance value
Ranges from about 0.1 to 150 microhenries across the family. Low values suit high switching frequency; higher values reduce ripple at lower frequency.
DC resistance
From about 0.65 milliohm on the largest low-value parts up to several hundred milliohms on the small high-inductance ones. It sets conduction loss.
IRMS
The continuous RMS current producing the datasheet's stated temperature rise. It is the steady-state limit and must be derated for high ambient temperature.
ISAT
The current at which inductance falls by the stated percentage. It caps the instantaneous peak, including startup inrush and load transients.
Blindage
Molded construction encloses the winding in magnetic material, so the part is inherently shielded. That reduces coupling into nearby traces and lowers audible noise.
Comparer
Molded inductor series side by side
Footprint and height together decide what current and inductance are available.
Revenir au sélecteur ↑| Dimensions du boîtier | Références | Dimensions (L×l×H) | Valeur d’inductance | DCR(mΩ) | IRMS | ISAT | Action |
|---|---|---|---|---|---|---|---|
| Série WHYT | 11 | 7.0*6.6*2.8mm, 7.0*6.6*3.8mm, 7.0*6.6*4.8mm, 11.5*10*2.8mm, 11.5*10*3.8mm, 11.5*10*4.8mm, 13.45*12.6*4.8mm, 13.45*12.6*5.8mm, 13.45*12.6*6.5mm, 17.15*17.15*7mm, 23.5*22*12.6mm | 0.22-47uH, 0.68-47uH, 0.47-47uH, 0.22-33uH, 0.15-100uH, 0.22-100uH, 4.7-150uH, 4.7-100uH, 2.2-100uH, 1.00-100.00uH | 3-385mΩ, 4.8-320mΩ, 3.9-230mΩ, 0.89-160mΩ, 0.65-340mΩ, 0.8-290mΩ, 0.7-130mΩ, 9-350mΩ, 8.5-170mΩ, 2.5-130mΩ, 0.95-40mΩ | 1.5-24A, 1.8-17A, 2-20A, 4-50A, 2-45A, 2.1-37A, 3-50A, 1.5-15A, 3.5-16A, 3.7-29A, 11-70A | 2-34A, 2.5-19A, 2.6-21A, 2.6-33A, 2.3-75A, 2.8-65A, 5-75A, 2.7-24A, 4-24A, 5-34A, 9-60A | Filtrer → |
| Série WHYTA | 7 | 4.4*4.2*1.0mm, 4.4*4.2*1.8mm, 5.4*5.2*1.6mm, 5.4*5.2*2.8mm, 7.0*6.6*1.3mm, 7.0*6.6*1.6mm, 7.0*6.6*2.2mm | 0.15-4.7uH, 0.1-10uH, 0.47-10uH, 0.1-22uH, 0.22-22uH | 9-195mΩ, 4-282mΩ, 9-155mΩ, 3-125mΩ, 8.5-175mΩ, 2.3-350mΩ, 3-230mΩ | 1.8-7.5A, 1.6-13A, 2.5-10.5A, 3.2-25A, 2-10A, 1.8-25A, 2-21A | 2.2-15A, 2-22A, 3-15.5A, 3.5-30A, 3-16A, 2.3-38A, 2.5-34A | Filtrer → |
| Série WHYTP | 1 | 3.4*3.2*1.8mm | 0.33-10uH | 21-422mΩ | 1.4-8A | 1.6-10A | Filtrer → |
Analyse de l’application
Where molded power inductors are used
Confirm output current, switching frequency, ripple budget and height clearance.
DC-DC converters and POL rails
- Confirm the ripple budget and switching frequency, then check IRMS at the real ambient and ISAT against startup inrush.
Automotive and industrial supplies
- Ambient temperature and vibration both matter. Derate IRMS for the environment and confirm the mounting suits the vibration profile.
Compact consumer boards
- Height usually decides. Work back from the clearance available, then confirm the chosen size band still meets both current ratings.
Noise-sensitive equipment
- Molded parts are inherently shielded and quieter than open wirewound. Verify audible noise at your switching frequency on the real assembly.
Documents
Molded inductor datasheets and drawings
Datasheets carry the saturation curve, temperature rise data and land pattern.
Affichage de jeux de fichiers disponibles représentatifs. Recherchez un SKU précis.
WHYT2313 seriesSérie WHYT
WHYTP0320 seriesSérie WHYTP
WHYT1770 seriesSérie WHYT
WHYT1265 seriesSérie WHYT
WHYT1260 seriesSérie WHYT
WHYT1250 seriesSérie WHYT
- 19
- Fiches techniques PDF répertoriées
- 0
- Jeux de fichiers 3D répertoriés
- 0
- Empreintes PCB répertoriées
Le contenu produit publié par VOOHU est vérifié par son équipe technique. Les caractéristiques, les téléchargements et les informations d’assistance technique sont associés à des références précises afin que vous puissiez les vérifier avant de demander des échantillons ou un devis.
Présentation de la catégorie
Molded versus wirewound, and which current rating binds
Two questions decide most molded inductor selections: whether the construction is right for the design, and which of the two current figures limits you.
Discuter d’une nouvelle conception
Contacter l’équipe FAE pour une évaluation de remplacement.
Vous avez déjà une référence ? Demander des échantillons ou un devis.
What molded construction changes
The winding is encased in a magnetic composite rather than wound on an exposed core. That makes the part self-shielding, so it couples less into neighbouring traces, and it damps the movement that causes audible buzz. It also gives a softer saturation curve, where inductance falls gradually rather than collapsing.
IRMS and ISAT do different jobs
IRMS is a thermal limit: the continuous RMS current that produces the stated temperature rise. ISAT is a magnetic limit: the current at which inductance has dropped by a stated percentage. A design has to satisfy both. Steady-state load is checked against IRMS, and peaks including startup inrush against ISAT.
Height is usually the real constraint
Within the same footprint, a taller body has more winding volume, which means lower DC resistance and higher current for the same inductance. The range spans from one millimetre high up to more than twelve. In practice the clearance over the converter often decides the series before any electrical parameter does.
FAQ
Molded power inductor questions engineers ask
Answers cover molded versus wirewound, IRMS against ISAT, and shielding.
What is a molded power inductor?
It is an inductor whose winding is encased in a magnetic composite material rather than wound on an exposed core. The construction makes the part self-shielding, reduces audible noise and gives a softer saturation characteristic. They are widely used in DC-DC converters where board space and magnetic coupling both matter.
How does molded compare with wirewound construction?
Molded parts are self-shielded, so they couple less noise into nearby traces, and they are quieter because the winding cannot move. Their saturation curve is softer, falling gradually rather than collapsing. Open wirewound parts can offer lower cost at some sizes. Compare on DCR, IRMS, ISAT and the shielding your layout needs.
What is the difference between IRMS and ISAT?
IRMS is a thermal rating: the continuous RMS current that produces the temperature rise stated in the datasheet. ISAT is a magnetic rating: the current at which inductance has fallen by a stated percentage. Both must be satisfied, IRMS for steady-state load and ISAT for peaks including startup inrush.
Which one usually limits the design?
It depends on the load profile. A steady high current load is usually limited by IRMS and temperature rise. A load with large fast transients, or a converter with significant startup inrush, is usually limited by ISAT. Check both against your actual current waveform rather than assuming.
How do I choose between size bands?
Start from the height clearance over the converter, because that is often the binding mechanical constraint. Within a footprint, a taller body gives lower DC resistance and higher current for the same inductance. Then confirm the band you can fit still meets both current ratings with margin.
Does molded construction really reduce noise?
It reduces two things. Magnetically, the enclosed winding radiates less into neighbouring traces, which helps in dense layouts. Acoustically, the encapsulation damps the winding movement that causes audible buzz at switching frequencies in the audio band. Verify both on your own assembly.
How much should I derate for temperature?
IRMS is defined for a stated temperature rise from a stated ambient. If your enclosure runs hotter or has restricted airflow, the usable current is lower. Measure the part's temperature at full load in the real enclosure at the highest rated ambient rather than trusting the headline figure.
How do I request molded inductor samples or a quote?
With a complete part number, send the part number, quantity, delivery region and the date you need it. If you are still selecting, send the output current, switching frequency, ripple budget, height clearance and ambient temperature, and a sales engineer will shortlist candidates.
Assistance technique
Poursuivre après la sélection du produit
Envoyez la référence candidate et la condition à examiner. Vous pourrez demander des échantillons une fois la sélection précisée ; les questions commerciales peuvent être abordées au cours du même échange technique.
- 1Références sélectionnées
- 2Analyse technique
- 3Demande d’échantillons
- 4Échange commercial
Pour une étude de remplacement
- Référence d’origine et fiche technique
Indiquez la révision du document
- Conditions de fonctionnement
Température, tension d’isolement et conditions de courant PoE prises comme référence
- Contraintes du boîtier
Nombre de broches, pas et espacement entre les rangées de broches
- Phase du projet et volume annuel
Pour faciliter la priorisation des échantillons et de l’évaluation
- Date d’analyse souhaitée
Date à laquelle vous avez besoin de références candidates et d’un comparatif des différences
L’analyse technique identifie les références candidates et explique les différences.
Pour des échantillons et un devis
- Références candidates
Issues du sélecteur ou de l’analyse technique
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Prototypage / présérie / production
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Précisez séparément les délais des échantillons et de la production
- Documentation requise
Documents de conformité, déclarations de matières ou rapports de tiers
La quantité d’échantillons, le délai et le coût dépendent de la phase du projet et de la référence. L’équipe commerciale répond les jours ouvrés.
Études de remplacement publiées
Comparatif de sélection de transformateurs push-pull : VOOHU WHST06Q02E0 et Würth Elektronik 750316819
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