TVS Diode Patents: Top Companies & Filing Trends 2026
- Filing has cooled since 2017. The peak year saw 40 records; the trend line runs flat to declining through the 2022 midpoint of 13, before the expected reporting lag understates the most recent years.
- The top 10 hold just over a third. The ranked leaders' top 10 combined account for 150 of 441 records in scope (34.0%) — concentrated, but not a closed field.
- Protective circuit claims dominate the IPC mix. H02H (protective circuit arrangements) appears on 63.0% of the 441 records, more than any semiconductor-device class.
What this landscape covers
This landscape tracks 441 published records filed between 2015 and 2026 that describe transient voltage suppressors, TVS diode arrays and surge protection devices, narrowed by claim language around clamping voltage, peak pulse power and ESD robustness. The scope sits at the intersection of protective circuit design (H02H) and the semiconductor structures (H01L, H10D) that implement it, plus adjacent resistor-based protection (H01C).
Filing activity peaked in 2017 and has not returned to that level since, which points to a field where the core clamping and array-structure claims were staked out early and later filings refine rather than redefine the approach. Publication lags filing by roughly 18 months, so any apparent drop in the last one to two years should be read with that lag in mind rather than as a hard signal of declining interest.
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Filing trends and technology composition
Two views of the same 441 records: filing volume over time, and how those records distribute across IPC subclasses. Because a single record can carry several IPC codes, the composition shares add up to more than 100%.
A 2017 peak followed by a flat-to-declining run
Filings hit 40 in 2017, the high point of the whole window, then settled toward a 2022 midpoint of 13. That pattern is more consistent with a maturing claim space than with a technology still being actively opened up.
Protective circuits outweigh device structure claims
H02H covers 63.0% of the 441 records — the largest single subclass — ahead of H01L (38.8%) and H10D (21.8%). Resistor-based protection under H01C sits at 12.5%, a smaller but non-trivial slice worth checking before assuming TVS diode structure claims are the only relevant prior art.
Shares are the percentage of the 441 records in scope. A patent can carry several IPC classes, so the shares add up to more than 100%.
Go deeper on TVS Diodes and Circuit Protection Devices with Eureka
This page is one run against one query. Ask Eureka your own question about tvs diodes and circuit protection devices and every answer comes back with the patent numbers behind it.
Try EurekaThe most-cited prior art in this space
US11239654B1 — Surge protection device for complex transients
A three-stage surge protection device protects against complex, time-variant voltage transients, including those from a high-altitude nuclear electromagnetic pulse or a solar coronal mass ejection, by combining a snubbing low-pass filter, a transient voltage suppressor and an electronic crowbar circuit. The filter lowers let-through voltage for short-duration pulses and spreads energy so the TVS stage clamps more effectively, while the crowbar circuit takes over once the TVS can no longer manage the transient.Filed by Faraday Defense Corporation, published 2022-02-01.
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | US4901183A | Surge protection device | 229 |
| 2 | US20070073807A1 | Latch-up free vertical TVS diode array structure using trench isolation | 133 |
| 3 | US6775121B1 | Power line surge protection device | 72 |
| 4 | US20140167218A1 | Circuit configuration and manufacturing processes for vertical transient voltage suppressor (TVS) and EMI fil… | 49 |
| 5 | US20090268361A1 | Transient voltage suppressor (TVS) with improved clamping voltage | 44 |
| 6 | US7880223B2 | Latch-up free vertical TVS diode array structure using trench isolation | 44 |
| 7 | US20100321840A1 | Bottom source NMOS triggered zener clamp for configuring an ultra-low voltage transient voltage suppressor (T… | 41 |
| 8 | US8218276B2 | Transient voltage suppressor (TVS) with improved clamping voltage | 37 |
| 9 | US10062682B1 | Low capacitance bidirectional transient voltage suppressor | 32 |
| 10 | US20160148921A1 | Circuit configuration and manufacturing processes for vertical transient voltage suppressor (TVS) and EMI fil… | 32 |
Citation counts reflect influence within this searched corpus and skew toward older filings; treat them as a signal of foundational status, not current commercial relevance.
Each row carries its publication number; clicking a row searches Eureka by that number.
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Three patterns stand out once volume, timing and classification are put side by side.
The top 10 hold a third, not a majority
The ranked leaders' top 10 combined for 150 of 441 records (34.0%), with the leader alone at 30. That leaves roughly two-thirds of the field spread across a long tail of single- and few-filing entrants, which is a workable entry pattern for a new filer with a genuinely distinct clamping or array approach.
Filing peaked in 2017 and has not recovered
The 2022 midpoint of 13 filings confirms a declining trend rather than a temporary dip. Combined with the 18-month publication lag, this suggests core clamping-voltage and array-structure claims were largely staked out in the 2016-2018 window.
Circuit-level claims outnumber device-structure claims
H02H protective circuit arrangements appear on nearly two-thirds of records, ahead of H01L semiconductor device claims at 38.8%. A filer focused purely on die structure is competing in a smaller slice of the field than one addressing circuit-level integration.
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to tvs diodes and circuit protection devices, with the prior art for and against each one.
Who is active, and where the gaps sit
The assignee ranking spans 100 companies, from semiconductor device makers to connector and lighting firms folding surge protection into their own product claims. Recent-year momentum data shows several previously active filers at zero in the latest year, consistent with the overall decline in trend volume.
A clear leader, not a runaway one
The top-ranked assignee holds 30 records, well ahead of fifth place at 12 and tenth place at 8 — a gradual taper rather than a cliff, which means displacement at any single rank is plausible for a well-differentiated filer.
US and China dominate the receiving-office split
The United States (195) and China (87) together account for the bulk of filings, with Europe (53) and WIPO/PCT (31) as secondary routes. India and Canada are minor but present, suggesting some filers are already building a modest international footprint.
Co-filing is rare and concentrated
Only 10 co-assignee pairs appear across the dataset, with the strongest pair linked on 4 records. This is largely a field of single-assignee filings rather than joint-development patenting.
| Assignee | Recent year | YoY |
|---|---|---|
| Alpha & Omega Semiconductor (Cayman) Ltd. | 0 | — |
| BOBDE MADHUR | 0 | — |
| Littelfuse Semiconductor (Wuxi) Co., Ltd. | 0 | -100% |
| Mersen USA Newburyport-MA LLC | 0 | — |
| John Mezzalingua Associates, Inc. | 0 | — |
| Huawei Technologies Co., Ltd. | 0 | — |
| Alpha & Omega Semiconductor Inc. | 0 | — |
| RIPD IP ASSETS LTD | 0 | — |
Where to take this analysis
The dataset points to a field with a settled core and an open periphery. Two directions make sense depending on whether the goal is defensive clearance or new filing.
Map claim boundaries around the 2017 filing cluster
Because filing peaked in 2017 and has declined since, the highest-value clearance work is checking whether a new clamping or array-structure approach reads on claims from that period rather than on recent filings.
Explore claim charts in EurekaTest white-space branches before drafting
Resistor-based protection, switch-integrated designs and telephonic-line applications carry lower filing density than the core H02H/H01L claims. Running a freedom-to-operate check on these branches before drafting can surface a cleaner first claim.
Run a white-space search in EurekaCommon questions on TVS diode patents
The dataset ranks 100 assignees by record count, with the leader holding 30 of the 441 records in scope. The next few ranks taper gradually — fifth place holds 12 and tenth place holds 8 — rather than dropping off sharply, so the field has one clear leader but no single dominant gatekeeper. The top 10 assignees combined account for 34.0% of all records, meaning the majority of filings sit outside the most active ten filers.
Filing volume peaked in 2017 at 40 records and has trended flat to declining since, with the 2022 midpoint at 13 filings. That pattern suggests the core clamping-voltage and array-structure claims were largely established in the mid-2010s. Recent years look lower still, but publication typically lags filing by about 18 months, so the most recent one to two years in any such dataset will always appear understated.
Protective circuit arrangements (IPC class H02H) appear on 63.0% of the 441 records, the single largest category, ahead of semiconductor device structure claims under H01L (38.8%) and H10D (21.8%). Resistor-based protection under H01C covers 12.5% of records. Because a record can carry multiple IPC codes, these figures overlap rather than summing to a whole field.
Lower-density branches in this dataset include resistor-based surge limiting, switch- and relay-integrated protection, and telephonic line protection, all of which carry meaningfully fewer records than the core protective-circuit and semiconductor-structure classes. These are not guaranteed to be open, but they carry less claim density than the crowded H02H and H01L core, making them a reasonable starting point for a freedom-to-operate check before drafting.
US11239654B1, assigned to Faraday Defense Corporation and published in 2022, claims a three-stage surge protection device combining a snubbing low-pass filter, a transient voltage suppressor and an electronic crowbar circuit, aimed at complex transients such as those from a high-altitude electromagnetic pulse or solar event. It matters because it stakes out a multi-stage architecture rather than a single clamping element, which narrows the room for a competing multi-stage design that follows the same filter-then-clamp-then-crowbar sequence.
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Disclaimer. This page is generated from Patsnap Eureka data drawn from a limited snapshot of global patent and scientific-literature records, and is provided for general information and reference only.
Patent data carries inherent limitations: recent filings (typically the most recent 18–24 months) are under-counted due to standard publication lag; counts may be reported at either a patent-family or a patent-record basis and are not always directly comparable; classification, applicant-name, and citation data may contain errors, duplicates, or omissions; and the underlying search query defines and constrains the scope shown. As a result, the analysis may be incomplete or inaccurate and may not reflect the full technology landscape.
Nothing on this page constitutes an exhaustive prior-art, novelty, freedom-to-operate, or validity search, nor does it constitute legal, financial, investment, or professional advice, and it should not be relied upon as such. Any patent, commercial, or strategic decision should be verified independently and reviewed with qualified patent, legal, and domain professionals. Patsnap makes no warranties, express or implied, as to the accuracy, completeness, or fitness for any particular purpose of the information presented.
Machine translation. Assignee and organisation names originally recorded in Chinese, Japanese or Korean have been rendered into English by an AI translation step so that the tables stay readable. These renderings are best-effort and may not match a company’s registered English name; the original name is what the underlying patent record carries, and it is what any Eureka query launched from this page uses.