Common mode impedance
What the choke presents to common mode noise, quoted at a stated frequency. Compare candidates at the same frequency or the numbers do not correspond.
インダクター製品
WHAC4532A Signal Line Common Mode Chokes
WHAC4532A is the largest body in the signal line range, for cases needing higher common mode impedance or more current headroom on the pair. Confirm the trace spacing and the effect on signal integrity before choosing it.
型番検索・選定
WHAC4532A Signal Line Common Mode Chokesの型番を検索
この表では、海外サイトの現行製品データ、公開済みの選定項目、型番別の技術資料リンクを使用しています。
※画像列と型番列は固定されています。横にドラッグしてすべての仕様を確認できます
| 画像 | データシート | 比較 | ダウンロード |
サイズ
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コモンモードインピーダンス（10MHz）最小値（Ω）
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コモンモードインピーダンス代表値（Ω）
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インダクタンス（uH）+50/–30%
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最大RDC（Ω）
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漏れインダクタンス（nH）代表値
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最小絶縁抵抗（MΩ）
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最大定格電流
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最大定格電圧（V）
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サンプル |
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| 画像 | 型番 | データシート | 比較 | ダウンロード | サイズ | コモンモードインピーダンス（10MHz）最小値（Ω） | コモンモードインピーダンス代表値（Ω） | インダクタンス（uH）+50/–30% | 最大RDC（Ω） | 漏れインダクタンス（nH）代表値 | 最小絶縁抵抗（MΩ） | 最大定格電流 | 最大定格電圧（V） | サンプル |
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WHLC-4532A-142T0 | SPEC | 4532 | - | 1400 | - | 0.25 | - | 10 | 700mA | 50 |
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WHAC-4532A-142T0 | SPEC | 4532 | - | 1400±25% | - | 148 | - | 10 | 1.0A | 50 |
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WHAC-4532A-102T0 | SPEC | 4532 | - | 1000±25% | - | 113 | - | 10 | 1.5A | 50 |
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WHAC-4532A-801T0 | SPEC | 4532 | - | 800±25% | - | 89 | - | 10 | 1.8A | 50 |
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WHAC-4532A-601T0 | SPEC | 4532 | - | 600±25% | - | 82 | - | 10 | 2.0A | 50 |
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WHAC-4532A-421T0 | SPEC | 4532 | - | 420±25% | - | 60 | - | 10 | 2.2A | 50 |
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WHAC-4532A-900T0 | SPEC | 4532 | - | 90±25% | - | 39 | - | 10 | 3.0A | 50 |
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WHAC-4532A-142T0 | SPEC | 4532 | - | 1400±25% | - | 148 | - | 10 | 1.0A | 50 |
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WHAC-4532A-102T0 | SPEC | 4532 | - | 1000±25% | - | 113 | - | 10 | 1.5A | 50 |
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WHAC-4532A-801T0 | SPEC | 4532 | - | 800±25% | - | 89 | - | 10 | 1.8A | 50 |
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WHAC-4532A-601T0 | SPEC | 4532 | - | 600±25% | - | 82 | - | 10 | 2.0A | 50 |
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WHAC-4532A-421T0 | SPEC | 4532 | - | 420±25% | - | 60 | - | 10 | 2.2A | 50 |
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WHAC-4532A-900T0 | SPEC | 4532 | - | 90±25% | - | 39 | - | 10 | 3.0A | 50 |
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WHAC-4532A-101U0 | SPEC | 4532 | 2000 | 5800 | 100 | 2.5 | 200 | 10 | 150mA | 50 |
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WHAC-4532A-510U0 | SPEC | 4532 | 1000 | 2800 | 51 | 1.8 | 150 | 10 | 200mA | 50 |
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WHAC-4532A-220U0 | SPEC | 4532 | 500 | 1200 | 22 | 1.4 | 80 | 10 | 200mA | 50 |
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WHAC-4532A-110U0 | SPEC | 4532 | 300 | 600 | 11 | 1.2 | 50 | 10 | 250mA | 50 |
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WHAC-4532A-101U0 | SPEC | 4532 | 2000 | 5800 | 100 | 2.5 | 200 | 10 | 150mA | 50 |
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WHAC-4532A-510U0 | SPEC | 4532 | 1000 | 2800 | 51 | 1.8 | 150 | 10 | 200mA | 50 |
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WHAC-4532A-220U0 | SPEC | 4532 | 500 | 1200 | 22 | 1.4 | 80 | 10 | 200mA | 50 |
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一致する型番がありません
選択した条件を広げるか、現在の検索条件をクリアしてください。
By interface
Chokes by interface: USB, CAN, Ethernet, HDMI
The interface sets the data rate and therefore what the choke is allowed to do to the signal.
選定方法
Selecting a signal line common mode choke in four steps
Interface first, then the failing band, then signal integrity, then the footprint.
- 01
Start from the interface
USB, CAN bus, Ethernet and HDMI each set a data rate and a signalling scheme. That determines how much the choke is allowed to affect the signal.
- 02
Find the failing band
Read the frequency range where the radiated or conducted scan exceeds the limit, then look for a part whose impedance is high across that range.
- 03
Protect the signal
Check the impedance peak does not sit near your signal's fundamental, and that DC resistance does not add unacceptable loss on the pair.
- 04
Verify on the real link
Measure the eye diagram and return loss on your own board. Datasheet curves are taken in a reference fixture, not in your layout.
Parameters
Reading signal line choke ratings
Impedance is quoted at a frequency; so is everything else that matters here.
定格電流
Matters when the pair also carries bias or power, as on some bus and PoE-adjacent designs. On a pure signal pair it is rarely the binding constraint.
DC resistance
Adds loss in the signal path and causes a voltage drop where the pair carries current. Read the maximum figure rather than a typical value.
Differential mode loss
How much of the wanted signal the part removes. Low values matter more as the data rate rises; verify by measurement rather than by datasheet alone.
Package size
Sets the board area and the spacing available between the differential traces. Smaller packages ease layout but usually offer lower impedance.
Mode conversion
Asymmetry between the two windings turns common mode into differential noise. It is the reason a choke can make an eye diagram worse rather than better.
比較
Signal line choke families side by side
Package size and impedance level separate the families; the interface decides which fits.
選定表に戻る ↑| サイズ | 型番数 | コモンモードインピーダンス（10MHz）最小値（Ω） | コモンモードインピーダンス代表値（Ω） | インダクタンス（uH）+50/–30% | 最大RDC（Ω） | 漏れインダクタンス（nH）代表値 | 最小絶縁抵抗（MΩ） | 最大定格電流 | 最大定格電圧（V） | 操作 |
|---|---|---|---|---|---|---|---|---|---|---|
| 2012 | 13 | - | 120, 1200, 1000, 800, 380, 360, 260, 180, 90, 75 | - | 0.3, 0.35, 0.4, 0.45, 0.55, 0.88, 1.3, 1.5 | - | 10 | 280mA、300mA、400mA | 50, 125 | 絞り込み → |
| 3225 | 6 | 300, 500, 1000, 2200, - | 550, 1100, 2600, 5100, - | 11, 22, 51, 80, 100, 200 | 0.8, 1, 1.6, 2.5, 4, 4.9 | 50, 70, 130, 180, - | 10 | 70mA、150mA、200mA、250mA、300mA | 80 | 絞り込み → |
| 4532 | 21 | 300, 500, 1000, 2000, - | 600, 1200, 2800, 5800, 90±25%, 420±25%, 600±25%, 800±25%, 1000±25%, 1400±25%, 1400 | 11, 22, 51, 100, - | 0.25, 1.2, 1.4, 1.8, 2.5, 39, 60, 82, 89, 113, 148 | 50, 80, 150, 200, - | 10 | 150mA、200mA、250mA、700mA、1.0A、1.5A、1.8A、2.0A、2.2A、3.0A | 50 | 絞り込み → |
用途別確認
Where signal line common mode chokes are fitted
Confirm the interface, the data rate and whether the pair also carries bias current.
USB data lines
- Confirm the USB generation and its data rate, then verify the eye diagram and return loss on the real board after fitting the choke.
CAN bus and automotive networks
- Check the bus common mode voltage range and whether the pair carries bias, then confirm the part's temperature rating suits the environment.
Ethernet interfaces
- Confirm the link speed and how the choke interacts with the LAN transformer already in the path, then measure link stability and emissions.
HDMI and display links
- High rates make insertion loss and mode conversion critical. Measure the eye before and after rather than relying on the datasheet curve.
Documents
Signal line choke datasheets and drawings
Datasheets carry the impedance curve, DC resistance and recommended land pattern.
代表的な入手可能資料を表示しています。特定のSKUは検索して確認してください。
- 21
- PDFデータシート掲載数
- 21
- 3Dファイル掲載数
- 21
- PCBフットプリント掲載数
VOOHUが公開する製品情報は、エンジニアリングチームが確認しています。仕様、ダウンロード資料、技術サポート情報は型番ごとに紐付けられているため、サンプルや見積もりを依頼する前に確認できます。
カテゴリー概要
Choosing a common mode choke for a differential pair
On a power line the choke only has to pass current. On a signal pair it has to pass a waveform intact, which makes the selection harder.
型番が決まっている場合は、サンプルまたは見積もりを依頼。
Why the interface comes first
A choke that works on a CAN bus can wreck a USB link, because the data rates differ by orders of magnitude. The interface sets how much insertion loss and how much impedance in the signal path the link can tolerate. Decide the interface and its rate before you start comparing impedance figures.
Where the impedance peak sits
You want high common mode impedance across the band that fails your scan, and low impact at your signal's own frequencies. If the peak sits near the fundamental, the choke will attenuate the wanted signal as well as the noise. Read the curve, locate your two frequencies on it, and check they are far apart.
Mode conversion is the hidden risk
Real parts are never perfectly symmetric. Any imbalance between the two windings converts common mode noise into differential noise, which lands directly on the signal. This is why a choke sometimes makes an eye diagram worse. It cannot be predicted from the datasheet, so measure the eye and return loss on your own board.
よくあるご質問
Signal line choke questions engineers ask
Answers cover interface fit, eye diagram impact and how to compare candidates.
When do I need the 4532 size?
When the failing band sits low enough to demand high impedance, or when the pair carries enough current that smaller parts run short of headroom. Both are real reasons. Board area rarely is, so confirm one of them applies before accepting the larger footprint.
How does size affect the differential layout?
A larger body forces the two traces further apart through the part, which can disturb the pair's impedance and symmetry. Follow the recommended land pattern, keep the legs equal in length, and verify differential impedance and return loss after the change.
Does rated current matter here?
It does when the differential pair also carries bias or supply current, which happens on some bus and power-over-data designs. Read the rated current as a maximum under stated conditions, and derate for ambient temperature and restricted airflow in the enclosure.
Is the largest part always the safest choice?
No. More core material generally moves the impedance peak toward lower frequencies, so a large part can perform worse at a high failing frequency. It also has more effect on a fast signal. Match the curve to your band rather than defaulting to the biggest.
How do I request 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 interface, the data rate, the frequency band where your scan fails and whether the pair carries current.
エンジニアサポート
製品選定後のご相談
候補型番と、確認が必要な条件をお送りください。候補が明確になった後にサンプル支援を追加でき、商取引に関するご質問も同じ技術相談の中でご相談いただけます。
- 1選択した型番
- 2エンジニア確認
- 3サンプル申請
- 4商談
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資料のリビジョンも記載してください
- 動作条件
温度、絶縁電圧、PoE電流の条件
- パッケージ制約
ピン数、ピッチ、ピン列間隔
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サンプルと評価の優先度確認に使用します
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適合資料、材料宣言、第三者機関レポートなど
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