Siliconix Hermetic
Supporting Long-Term Availability for Siliconix Hermetic Devices
Looking Beyond The Datasheet?
Not sure if your part is still available?
ES Components can help determine:
✔ Current availability
✔ Legacy inventory options
✔ Alternate sourcing paths
✔ Manufacturing solutions
When “Obsolete” Doesn’t Mean Gone — But Still Stops Your Program
The Reality Engineers Are Facing Today
A $25 part can trigger a $300K redesign.
An “obsolete” device can delay a program by 8+ weeks.
And in many cases…
The part still exists.
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Across aerospace, defense, medical, and industrial programs, we’re seeing a consistent pattern:
> Components labeled “obsolete” are often still available
> But not through traditional channels
> And not when teams wait too long to look
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What This Means for Your Program
When availability is evaluated too late:
• redesign becomes the default
• schedules slip
• costs increase
• risk grows
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But in many cases, that outcome can be avoided.
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What We’re Seeing with Siliconix Hermetic Devices
Many legacy Siliconix hermetic components continue to be available through:
• original die
• existing inventory
• qualified manufacturing flows
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Meaning:
> “Obsolete” doesn’t always mean unavailable
> It means you may need a different sourcing approach
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How ES Components Supports This
We help engineers and buyers:
• determine true availability
• avoid unnecessary redesign
• maintain continuity in proven designs
• source legacy Siliconix hermetic devices
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Because sometimes the best solution…
isn’t changing the design.
It’s finding what still exists.
Real-World Impact
$25 part → avoided $300K redesign
“Obsolete” device → prevented 8-week delay
Legacy component → sourced without redesign
ES Components Your Source For Siliconix
Commercial & Hermetic Military Products
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In 2017, ES Components strategically expanded its semiconductor capabilities by acquiring Siliconix’s complete inventory of Military JFETs, MOSFETs, and analog switches—along with all associated finished goods, assembly, and test equipment. This acquisition significantly strengthened ES Components’ position in the high-reliability market, enabling deeper support for both legacy and next-generation designs. In addition to fully qualified military products, ES Components gained access to millions of Siliconix Hi-Rel finished goods and wafers—ideal for non-MIL-PRF-19500 and MIL-PRF-38535 assemblies—delivering unmatched flexibility, performance, and supply assurance to engineers tackling the most demanding applications.
ES Components subcontracted our JAN JFET and MOSFETS (MIL 19500) Production and Test to VPT Components. Per the DLA the assemblies must be marked with the VPT brand not Siliconix or ES Components but, the internal Qualified SILICONIX Silicon chips made in Santa Clara and outperform the competition as they always have.
The Analog Switch and other Military components previously offered by SILICONIX are now Assembled and Qualified by ES Components to (Mil 38535) and carry the ES Components Brand not Siliconix and like the JAN JFETS have SILICONIX Qualified Siliconix chips Inside. The same Siliconix Military products with a different brand.
In addition to Military Qualified products, ES Components received millions of SILICONIX Hi Reliability finished goods and wafers of both JFETS/MOSFETS and Analog Switches, for non Mil 19500 and Mil 38535 assemblies to be tested and marked with the ES Components Brand not the Siliconix. Like the Military products all Die are SILICONIX manufactured and meet the same performance and quality standards.
SILICONIX also offered Specials, Custom, Non-Standard Military grade and Hi Reliability assemblies. ES Components has the ability to supply those same assemblies using SILICONIX Die, screened to all requirements or any other custom configuration a customer may need.
In conclusion SILICONIX Military and Industrial equivalents are still alive and available from ES Components. Bring us your requirements, we have seamless solutions.
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o MOSFETS
o JFETS
o CURRENT REGULATORS
o LOW LEAKAGE DIODES
o HERMETIC ANALOG SWITCHES
o VOLTAGE CONTROLLED REGULATORS
o CUSTOMER SPECIFIC
o COTS Commercial Off-The-Shelf
o OTS Hermetic Off-The-Shelf
o MOTS Military Off-The-Shelf (MIL-PRF-19500 and MIL-PRF-38535)
o SOTS Up Screened -2 -3 Off-The-Shelf (MIL-PRF-19500 and MIL-PRF-38535)
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Many legacy Siliconix hermetic devices — including JFETs, MOSFETs, and analog switches — continue to be available through:
• Original die
• Remaining inventory
• Qualified manufacturing flows—
> Meaning A redesign may not be necessary
> A delay may not be unavoidable—
But only if this is identified early enough.
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The issue isn’t always the component.
> It’s when availability is evaluated
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When this happens late in the process:
• Design is already locked
• Timelines are committed
• Pressure is high
• Options are limited—
At that point, even a solvable sourcing challenge becomes:
> a schedule delay
> a cost increase
> a program risk -
At ES Components, we help engineers and buyers determine:
• Whether an “obsolete” part is truly unavailable
• What sourcing paths still exist
• How to maintain continuity in proven designs
• How to avoid unnecessary redesign and requalification—
Our focus includes continued supply of Siliconix hermetic devices through:
• Legacy inventory
• Die-based solutions
• Qualified manufacturing processes—
Because sometimes the best solution isn’t changing the design.
It’s finding what still exists.
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A low-cost component nearly triggered a six-figure redesign
An “obsolete” device created an 8-week delay risk
A legacy part was sourced without requiring redesign
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These situations are becoming more common.
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And they’re avoidable — with the right visibility early.
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If you’re working with a Siliconix hermetic device that is:
• difficult to source
• labeled obsolete
• creating schedule risk—
We can help you determine what options still exist.
> Contact ES Components to discuss your application and sourcing needs.
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