Semtech Corporation — MIL-PRF-19500 legacy JAN, JANTX, JANTXV & JANS diode sourcing
Semtech Corporation (Nasdaq: SMTC) — the Camarillo, California analog and mixed-signal semiconductor company best known today for LoRa low-power wide-area IoT — is a historic MIL-PRF-19500 QPL holder. For more than six decades, its Space & HiRel discrete diode line supplied JAN, JANTX, JANTXV and JANS rectifiers, TVS devices and space-level flows to U.S. defense and space programs. Semtech formally divested that High Reliability Discrete Diodes and Assemblies business to Micross Components, Inc. on May 3, 2022, but Semtech-branded JAN lots remain specified on legacy DoD BOMs and continue to move through the excess and long-term stocking channels that Hybrid Electronics supports.
- 1960Founded
- Camarillo, CAHQ
- NASDAQ: SMTCTicker
- Legacy / HistoricQPL-19500 Status
- May 3, 2022HiRel Divested
- JAN → JANSQuality Levels
About Semtech and its HiRel discrete legacy
Semtech Corporation was founded in 1960 by Gustav H.D. Franzen and Harvey Stump, Jr., one year after the same two engineers founded Diodes Incorporated. The pair established Semtech with a narrow, deliberately specialized mission: supply the U.S. military and aerospace industries with high-reliability semiconductor rectifiers — the devices that convert alternating current to direct current inside aircraft power systems, missile guidance electronics, radar, and early spacecraft. From the first year of operation, Semtech targeted applications where "failure was not an option," and the company built its manufacturing processes around the environmental extremes of military and space use.
Semtech went public on the American Stock Exchange in 1967, funding expansion of its discrete rectifier and diode line. Through the 1970s the company grew to roughly $15 million in annual sales while remaining focused on high-reliability niches that larger volume-oriented semiconductor makers ignored. In 1993 Semtech launched its first commercial line of transient voltage suppressor (TVS) diodes, translating the hermetic protection know-how of its military line into the emerging commercial and telecom markets. That commercial TVS product family became transformative for the company — and the discrete high-reliability diode operation continued alongside it as a distinct, quietly profitable business serving defense and space.
The center of gravity for Semtech shifted decisively toward analog and mixed-signal in the 2010s. Semtech acquired the French startup Cycleo in 2012, which brought the long-range wireless modulation technology now marketed as LoRa, and Semtech went on to help found and steward the LoRa Alliance and the LoRaWAN protocol used across global low-power IoT networks. Semtech is today headquartered at 200 Flynn Road, Camarillo, CA 93012 and trades on Nasdaq under the symbol SMTC. Its ongoing product portfolio — protection (commercial TVS), power management, optical PHY (CopperEdge, DirectEdge, FiberEdge), sensing (PerSe), LoRa, and cellular IoT via the 2023 Sierra Wireless acquisition — does not include hermetic JAN-level discretes. The MIL-PRF-19500 line has moved on.
QPL-19500 status — legacy holder, business transferred to Micross
Semtech Corporation was a longtime certified manufacturer on the DLA MIL-PRF-19500 Qualified Products List. Historic QPL-19500 revisions maintained by the DLA Land and Maritime office list Semtech Corporation among the qualified sources across multiple slash sheets, in parallel with names such as Microsemi, International Rectifier, Alpha Industries, Motorola, and Siemens. The Semtech DSCC-certified production facility in Reynosa, Mexico produced JANS-qualified diodes marketed under the "Space JANS-PDA" catalog identity familiar to defense procurement teams.
The status changed on May 3, 2022. On that date Semtech completed the divestiture of its High Reliability Discrete Diodes and Assemblies business to Micross Components, Inc. — a Behrman Capital portfolio company — in an all-cash transaction valued at approximately $30 million gross, or roughly $26.2 million net of cash disposed. The divested business had generated approximately $14 million in fiscal 2022 revenue, and every employee plus the Reynosa, Mexico manufacturing footprint moved to Micross. Semtech CEO Mohan Maheswaran characterized the sale as consistent with Semtech's practice of exiting non-strategic businesses that do not align with its Smarter Planet initiatives. The Micross press release noted that the acquired product families had served military and space applications for more than 60 years.
The practical consequence for anyone reading a legacy DoD bill of materials is this: the Semtech Corporation brand itself is now a historic MIL-PRF-19500 holder. Current-production equivalents of the qualified diode families are made at Micross Semiconductor Solutions, and current QPL/QML-19500 entries reflect that transfer. Legacy Semtech-branded JANS lots, however, remain fully genuine JAN-level product with valid DSCC traceability. They continue to be searched, quoted, and specified by name and part number on older aerospace and defense programs, which is exactly the sourcing gap Hybrid Electronics was set up to close.
MIL-PRF-19500 quality levels — what JAN, JANTX, JANTXV, and JANS actually mean
MIL-PRF-19500 is the U.S. Department of Defense performance specification for hermetically-sealed discrete semiconductor devices — diodes, rectifiers, transistors, thyristors, SCRs, and TVS devices — administered by the DLA Land and Maritime office in Columbus, Ohio (the successor organization to DSCC-VQ). The specification defines a stack of ascending product-assurance levels, indicated by the prefix on a part number:
| Prefix | Level name | What it adds | Typical use case |
|---|---|---|---|
| JAN | Joint Army-Navy | Baseline qualification against slash sheet, Group A/B/C conformance | Ground defense, ruggedized industrial |
| JANTX | JAN with eXtra Testing | Adds 168-hour burn-in and additional 100% electrical screening | Airborne, avionics, missile |
| JANTXV | JANTX with Visual inspection | Adds 100% pre-cap internal visual inspection | Higher-reliability avionics, tactical space |
| JANS | Joint Army-Navy-Space | Adds wafer lot acceptance, Group E conformance and full space screening | Launch vehicles, satellites, deep space |
| JANHC / JANKC | Chip / die-level | Unencapsulated die screening for downstream hybrid assembly | MIL-PRF-38534 hybrids, custom modules |
A defining feature of the MIL-PRF-19500 flow is Percent Defective Allowable (PDA), a lot-acceptance ceiling: if the fraction of parts failing burn-in or the Group A electrical screen exceeds the PDA specified for the level and slash sheet, the whole lot is rejected. This is why lot-level traceability matters so much on legacy JAN parts, and why marketing documents such as the Semtech Space JANS-PDA catalog put "PDA" directly in the title — it is the shorthand for a lot that has cleared every screen, not just the individual parts. On top of the older per-part-type Qualified Products List (QPL) model, the DoD now also operates the line-level Qualified Manufacturers List (QML) framework, which is how successor manufacturers of former QPL-19500 lines maintain certification against the specification.
Semtech's historical MIL-PRF-19500 product portfolio
Semtech's HiRel discrete catalog was tightly focused on rectifier diodes and TVS devices — the two device categories the company had built continuous manufacturing expertise in since 1960. In line with buyer intent, this page describes part families and slash sheets rather than individual JAN part numbers; specific part-number availability is confirmed on quote. The families below are drawn directly from the Semtech Space JANS-PDA catalog that Hybrid Electronics hosts in its own inventory reference library.
Superfast recovery rectifiers — MIL-PRF-19500/477
Semtech was a widely-specified source for hermetic superfast recovery rectifiers on slash sheet /477, covering the 50 V through 150 V reverse-voltage range at continuous forward currents of 2.5 A and 6.0 A. Both axial-lead and surface-mount package options were available across JAN, JANTX, JANTXV and JANS quality levels. These families remain heavily specified in switching power converters, motor drives and pulse-width-modulated power stages on legacy defense and space platforms.
Fast recovery rectifiers — MIL-PRF-19500/411
The fast recovery axial rectifier line covered slash sheet /411 at 50 V through 600 V reverse voltage and continuous forward currents up to 4.5 A. These devices sit between the standard-recovery and superfast lines and are commonly used in freewheeling, snubber and clamp positions in avionics and space power electronics.
Standard recovery axial rectifiers — MIL-PRF-19500/420 and /427
For general power conversion, Semtech carried two standard recovery axial families across JAN through JANS. Slash sheet /420 covered 200 V through 1000 V at 5.0 A, and slash sheet /427 covered the same voltage range at 2.0 A. Axial-lead glass hermetic packages dominated this line, with matching surface-mount "US" variants offered on selected part numbers.
Transient Voltage Suppressors (TVS) — MIL-PRF-19500/516
Hermetic 500 W axial bi-polarity TVS diodes on slash sheet /516 were a major share of the Semtech HiRel catalog, with JANS versions offered in both axial-lead and surface-mount packages. TVS devices protect sensitive circuit nodes against ESD, secondary lightning, and inductive switching transients on military avionics, ground vehicle power buses, and space power distribution.
HR500S space-level flow — Semtech's JANS-equivalent up-screening
Alongside the formal MIL-PRF-19500 JANS parts, Semtech offered a proprietary space-level screening flow called HR500S, described in the company's marketing literature as "JANS equivalent." The flow started from a JANTXV platform device and added the additional screens required to reach JANS-level product assurance. HR500S could be applied both to standard QPL diodes and to QPL-equivalent diodes manufactured on Semtech's DSCC-certified line. Similar catalog-level screening was also offered as Source Controlled Document (SCD) parts, processed from wafer fabrication through the JANS screening requirement.
Rectifier assemblies and packaged discretes
Beyond individual devices, Semtech supplied packaged discrete rectifier assemblies in both catalog and custom configurations, spanning single-phase to multi-phase, high-voltage and high-current arrangements. These are the multi-device modules commonly used in avionics and ground power supplies where a single hermetic package replaces a discrete diode bridge.
Packaging heritage
The Semtech HiRel line was built around traditional axial-lead glass hermetic bodies (DO-4, DO-5, DO-13, DO-41-style) with matching surface-mount MELF and "US" suffix equivalents for the rectifier and TVS families that migrated to board-level SMT assembly.
Semtech Space JANS-PDA catalog — hosted in the Hybrid Electronics library
Hybrid Electronics hosts the first-party Semtech Space JANS-PDA catalog in its own inventory reference library at hybridelectronics.com/images/cataloug/s/SpaceJANS-PDA.pdf. The catalog was published by Semtech Corporation from its 200 Flynn Road, Camarillo, California headquarters and lists the DSCC-qualified JANS product families available at the time from the Reynosa, Mexico production facility. It remains the most useful single reference document for identifying Semtech-branded MIL-PRF-19500 part families by slash sheet and product-assurance level, and it maps directly to the families we quote against today.
Buyers working from an older aerospace or defense bill of materials can use the catalog to translate a slash-sheet reference (for example /477 superfast recovery, /411 fast recovery, /420 standard recovery, or /516 TVS) into the specific Semtech JAN product family the BOM was written against, and then send Hybrid Electronics the shortage list for pricing and lead-time.
How Hybrid Electronics sources legacy Semtech JAN parts
Hybrid Electronics Corporation is a Sanford, Florida-based independent stocking distributor and sourcing agent, founded in 1981 as Knight Electronics. We are not an authorized distributor, agent, licensee, or franchised partner of Semtech Corporation. What we do is help defense, aerospace and industrial buyers close JAN-level BOMs on legacy, obsolete and discontinued Semtech-branded MIL-PRF-19500 product — the specific date-coded lots that predate the 2022 transfer of the Semtech HiRel line to Micross Components and that continue to be specified by name on older aerospace and defense programs.
Obsolete and discontinued Semtech JAN inventory
Semtech-marked JAN, JANTX, JANTXV and JANS parts from the Reynosa, Mexico production era — superfast, fast and standard-recovery rectifiers, hermetic TVS devices, and HR500S space-level flow lots. We source from OEM excess, contract-manufacturer surplus, and long-term storage stocks, with date-code traceability where available.
Slash-sheet and BOM-line sourcing
Have a MIL-PRF-19500 slash-sheet reference — /411, /420, /427, /477, or /516 — but a settled Semtech-brand part number the authorized channel no longer supports? Send us the line item; we will confirm what we can source in what package and at what lead time.
Cross-reference sourcing to current QPL sources
When the legacy Semtech-branded lot cannot be found, we can quote form-fit-function equivalents from other current MIL-PRF-19500 qualified manufacturers, including Micross Semiconductor Solutions (which now holds the transferred line) and other QPL-19500 sources on adjacent slash sheets.
Frequently asked questions
Is Semtech still on the MIL-PRF-19500 QPL?
Not under its own name. Semtech Corporation was a longtime holder on the DLA MIL-PRF-19500 Qualified Products List for JAN, JANTX, JANTXV and JANS diodes, rectifiers, and TVS devices, but the entire High Reliability Discrete Diodes and Assemblies business was divested to Micross Components, Inc. on May 3, 2022. Legacy Semtech-branded JANS lots remain in the DoD supply chain and are still specified on many older BOMs.
When did Semtech exit the JAN diode business?
On May 3, 2022, Semtech completed the sale of its High Reliability Discrete Diodes and Assemblies business to Micross Components, Inc. — a Behrman Capital portfolio company — for approximately $30 million in cash, roughly $26.2 million net of cash disposed. The business had generated approximately $14 million in fiscal 2022 revenue, and all employees plus the Reynosa, Mexico manufacturing operation transferred to Micross.
What Semtech JAN quality levels and slash sheets are relevant to legacy sourcing?
Semtech's historical MIL-PRF-19500 catalog covered JAN, JANTX, JANTXV and JANS quality levels across superfast rectifiers per slash sheet /477, fast recovery rectifiers per /411, standard recovery rectifiers per /420 and /427, and 500 W bi-polar TVS devices per /516. Semtech also offered its proprietary HR500S space-level flow, described as JANS-equivalent up-screening applied to JANTXV platform devices.
What is PDA and why does it appear in the Semtech catalog title?
Percent Defective Allowable (PDA) is a MIL-PRF-19500 lot-acceptance criterion: a maximum permissible fraction of parts that may fail burn-in or the Group A electrical screen before the entire lot is rejected. Semtech's space-level catalog was marketed as "Space JANS-PDA" to make clear that its JANS diodes shipped from lot-qualified, PDA-cleared production — not just as individually screened parts.
What Semtech HiRel part families does Hybrid Electronics source?
Hybrid Electronics sources legacy Semtech-branded hermetic discrete part families across all four JAN quality levels: superfast, fast and standard-recovery axial rectifiers, hermetic TVS devices, packaged rectifier assemblies, and HR500S / SCD space-level flow parts. We work by exact part number, by MIL-PRF-19500 slash-sheet reference, and against full BOMs, with a focus on obsolete, allocated and hard-to-find Semtech-marked lots.
Does Hybrid Electronics have a Semtech HiRel catalog reference?
Yes. Hybrid Electronics hosts Semtech's Space JANS-PDA catalog in its own inventory reference library at hybridelectronics.com/images/cataloug/s/SpaceJANS-PDA.pdf — a first-party Semtech marketing document listing DSCC-qualified JANS diodes across the /411, /420, /427, /477 and /516 slash sheets, along with the HR500S space-level flow.
Is Hybrid Electronics an authorized Semtech distributor?
No. Hybrid Electronics is an independent stocking distributor and sourcing agent. We are not a distributor, reseller, agent, licensee, partner, or authorized service provider of Semtech Corporation. All trademarks are the property of their respective owners.
Trademark and affiliation notice. All company names, product names, and trademarks referenced on this page are the property of their respective owners. Hybrid Electronics Corporation is an independent stocking distributor and sourcing agent; we are not a distributor, reseller, agent, licensee, partner, or authorized service provider of Semtech Corporation unless expressly stated. Component sourcing is subject to availability and inspection. Hybrid Electronics does not sell counterfeit parts and does not offer repair services. MIL-PRF-19500 and JAN quality-level designations are administered by the U.S. Defense Logistics Agency (DLA).