Counterfeit power semiconductors: what buyers should add to incoming-inspection checks

Good-Ark outlines a five-step defense against fake power diodes, from document and marking checks to X-ray, electrical, and decapsulation verification across the lot.

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TL;DR — 三句話摘要

  • Good-Ark names three counterfeit entry paths for power semiconductors: recycled, re-marked, and cloned parts, with forged documents travelling alongside them (S1).
  • The guide treats the lot - marking quality, date-code spread, lead finish, and document coherence - as the unit of suspicion, not the individual part (S1).
  • Verification ladder runs visual, X-ray, electrical (forward voltage, hot reverse leakage, surge, thermal), XRF, and decapsulation, with depth tied to part criticality (S1).

取自 key_takeaways （實際欄位，最多 3 筆）。事實與分析分別標示。

Counterfeit power semiconductors: what buyers should add to incoming-inspection checksEditorial cover for a component sourcing brief. Power motif; headline "Counterfeit power semiconductors: what buyers should add to incoming-inspection checks". No reported key numbers on this brief, so no number strip is drawn. 1 cited source. Static cover (no animation).Counterfeit power semiconductors: whatbuyers should add to incoming-inspectionchecksXAIPART
Cover image generated from data already shown on this page: the category motif, the headline, and reported key numbers. No decorative illustration; no third-party image.

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XAIPART 預測

本簡報包含可證偽的預測。

跳至完整預測及其證偽規則 ›
受影響零件

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Reported by Good-Ark Electronics on October 11, 2026. Summarized and analyzed by XAIPART Editorial.

What happened

Good-Ark Electronics published a guide on avoiding counterfeit power semiconductors, framing the problem as a process covering entry paths, signal checks, equipment verification, authorized sourcing, and rapid reaction to suspect parts.S1

The guide identifies three entry paths: recycled parts pulled from scrap and re-marked, re-marked lower-grade dies relabeled as a higher grade, and cloned parts built to imitate the original without its qualification.S1 It warns that a counterfeit lot typically travels with a plausible datasheet, certificate, and packaging photo assembled from fragments of legitimate documentation.S1

On visual and document signals, the guide lists crispness of laser or pad marking, lead and package finish (solder residue, rework signs, polished lead surfaces), date-code spread across the lot, and document consistency between lot numbers, date codes, and the manufacturer's datasheet wording.S1 It places the lot - not a single part - as the unit of suspicion, since a mixed lot assembled from recycled stock reveals itself through incoherent codes or reprinted labels.S1

For verification depth, the guide recommends X-ray inspection of die size, bond-wire pattern, and lead-frame structure against a known-good reference, followed by electrical tests of forward voltage, reverse leakage at temperature, surge behavior, and thermal response against the datasheet range.S1 It also names X-ray fluorescence for materials and destructive decapsulation as a conclusive option when stakes justify it, and ties verification depth to part criticality: a safety-grade automotive device from a non-authorized source earns the full ladder of X-ray, electrical, and decapsulation, while an authorized benign part may close with visual and lot checks.S1

The guide closes by directing buyers to the Good-Ark official site as the authorized sales channel for product status, packaging, and qualification documents, and recommends that an authorized request specify part number, package, quantity, datasheet revision, qualification status, and material declarations up front.S1

Key numbers
MetricReported value
Counterfeit entry paths described3 (recycled, re-marked, cloned)S1
Verification layers listedVisual, X-ray, electrical, XRF, decapsulationS1
Electrical parameters cited for power-part screeningForward voltage, reverse leakage at temperature, surge behavior, thermal responseS1
Document items the buyer should requestDatasheet revision, qualification status, material declarations, packaging/lot infoS1

Background timeline

  1. No prior milestones disclosed by the source.

XAIPART take

Technical impact

The guide's electrical-screening checklist (forward voltage, reverse leakage at temperature, surge, thermal response) is already standard for incoming inspection of rectifiers and TVS diodes, but the emphasis on hot-leakage as the discriminator for re-marked lower-grade dies is the most actionable point for power-diode buyers sourcing through brokers.

Tying decapsulation to part criticality rather than to budget is the correct posture for automotive and safety lines; for benign consumer rails, lot-level document coherence and a 5- to 10-piece electrical sample are usually enough to clear risk before SMT.

Market impact

The framing - that allocation and long lead times push buyers to brokers and open-market listings, where fakes concentrate - matches what we see on power MOSFET, Schottky, and TVS lines that have been in allocation for multiple quarters. Lead-time pressure is still the dominant counterfeit vector, so any resourcing plan that re-routes a line item through authorized channels will pay back on returns, RMAs, and field-failure analysis.

Brokers listing date-code spreads inconsistent with the manufacturer's format, or quoting well below authorized distribution, remain the highest-probability counterfeit signal; both should trigger sample-based electrical and X-ray verification before release to production.

Action

For each active BOM line item on allocation, add a one-page incoming-inspection addendum covering marking and lead-finish checks, document/lot coherence, and a defined electrical sample matrix (forward voltage and hot-leakage at minimum) before parts reach SMT. File the inspection record with the BOM so the next revision of the part selection has an audit trail.

For automotive, medical, or any safety-class line sourced off-authorized channel, escalate to X-ray and decapsulation on the first mixed signal in the lot rather than after a field failure. For authorized-channel lines, keep the request packet narrow (part number, package, quantity, datasheet revision, qualification status, material declarations) so the channel returns traceable documents rather than generic marketing PDFs.

XAIPART Forecast

XAIPART expects that, within 9 months of this brief's publication, at least one major broker-listed power-diode MPN family flagged by the source's three signals (price far below market, irregular marking, or mismatched date-code spread) will surface in a public counterfeit advisory or recall; if no such advisory is filed against any major power-semi MPN by 2027-07-19, this forecast is wrong. XAIPART analysis

Facts are as reported by the cited source. The design-in, sourcing and forward-looking statements above are XAIPART's analysis, not the source's claims. The source frames the problem as a process rather than reporting incident counts; counterfeit-event figures, MPN-level statistics, and named broker investigations were not disclosed by Good-Ark and should be treated as unconfirmed until an industry body publishes them.

Corrections: none at publication. This brief will be updated with a timestamp if the source corrects its report.

替代品與生命週期

已建檔的替代品——目錄範圍，並非市場排名
零件關係生命週期依據
— 檔案中無替代品 需要資料 — 需要 match_type 在任何前代標籤出現之前

「前代」與「替代」標籤僅來自已記錄的相符類型、生命週期狀態或來源文字。未記錄相符項目時，不顯示任何標籤。我們自家的刊登內容不構成市場參考。

值得關注

可證偽預測 — 門檻、時間窗與目前狀態。已證偽的預測仍保留可見。
主張門檻作者狀態
XAIPART expects that, within 9 months of this brief's publication, at least one major broker-listed power-diode MPN family flagged by the source's three signals (price far below market, irregular marking, or mismatche... no such advisory is filed against any major power-semi MPN by 2027-07-19 Pending

事後證明錯誤的預測會保留可見並加以標記。我們不會刪除。

受影響零件

無目錄相符項目。 此消息未對應到 XAIPART 目前上架的任何零件。我們不會推測相符項目，也不會顯示佔位清單。

各維度成本壓力

Source: FRED · Generated · reference output z and composite are algorithm outputs, not a fetch snapshot

Cost pressure by dimension — composite stateDiverging bars for three dimensions around a zero midpoint. Input Cost has no reading; Supply Demand z -1.4711, notable; Fx Energy z 0.1243, neutral. Composite index -10.1, band neutral.0Input costno readingSupply/demandz −1.4711 · notable46 dFX & energyz +0.1243 · neutral5 dcomposite −10.1 · neutral−100 · −40 · −15 · 0 · +15 · +40 · +100
Underlying values — copyable for verification.
DimensionFRED series IDUnitLagAs of
Input costPCOPPUSDM, PALUMUSDM, PNICKUSDMUSD/mt52 d
Supply/demandPCU334413334413, IPG3344Sindex(1982=100) / index(2017=100)46 d
FX & energyDEXCHUS, DCOILBRENTEU, DHHNGSPrate / USD/bbl / USD/MMBtu5 d

No free authoritative interface for: gold · silver · rare earth · polysilicon · lithium carbonate · market share — listed rather than approximated.

本內容的產生方式

流程證據 — 擷取、來源合理性、模型與閘門
此簡報的稽核軌跡
Source fetched Good-Ark Electronics · blog.goodark.com · 6,026 chars
Source sanity (S1) ok — passed before any model call (no s1_ block recorded)
Model / prompt MiniMax-M3 · prompt Blog Agent - News Summary (v2.8-final) · 7,198 tokens · 37.4s · run completed
Gate verdict hold · 6/6 applicable checks passed · spec v2.9 · C10 ratio 0.015138 · C10 rounds 0

上述每一列皆由流程產生，並非人工撰寫。

編輯評分

確定性閘門結果 — 純 PHP，判定過程無模型參與
閘門評分明細 6 項適用檢查， 6通過： 100 百分比. Hold items: C3(insufficient_evidence), C13 (falsifiable forecast), C17 (timeline depth) — sent to human review. Gate spec: v2.9 (S0 + S1 + C1–C20) · Source affinity (C20): 0.7818. 適用檢查已通過 6 / 6 = 100% · 判定： hold Hold items: C3(insufficient_evidence), C13 (falsifiable forecast), C17 (timeline depth) — sent to human review Gate spec: v2.9 (S0 + S1 + C1–C20) · Source affinity (C20): 0.7818 是否發布由審核關卡決定。獨立稽核分數僅供參考。

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來源

  1. Avoiding counterfeit power semiconductors: sourcing and verification in a tight market — https://blog.goodark.com/?p=1762 · rss · 存取於

事實標記為 S1/S2，並可追溯至連結來源。標示為 分析 是 XAIPART 自身的推理，與報導事實分開保留。來源連結會被追蹤，而非 nofollow ——署名為刻意為之。