Espec
EHS-222M-L
Provisional entry — research in progress
This page was generated automatically from cited public sources and hasn't completed the full research pass yet. Every specification shown carries its source; more detail is added as research completes.
The EHS-222M-L is an ESPEC highly accelerated stress test system. The EHS-222M-L has an interior dimension of φ394×L626 mm.[1]
What it is
How it works
The EHS-222M-L operates across a temperature range of +105.0°C to +142.9°C, a humidity range of 75% to 100%RH, and a pressure range of 0.019 to 0.193MPa.[2][3]
The EHS-222M-L provides an expanded chamber depth for large boards and multiple fixtures, and it supports up to 120 bias terminals at up to 1,000V.[2][3]
Where it fits in the process flow
General reference — not yet source-verifiedThe EHS-222M-L fits in reliability qualification and validation rather than in wafer fabrication or assembly processing.
The chamber is used after boards or electronic assemblies have been built and configured for test, when accelerated exposure is needed to evaluate robustness under combined thermal, humidity, voltage, and pressure stress.
Applications
The EHS-222M-L supports reliability testing of large multilayer PCBs and high-density electronic assemblies.[2]
The EHS-222M-L is aimed at accelerated reliability validation for AI hardware, automotive electronics, and data center systems.[2]
The EHS-222M-L is intended for complex testing configurations that require many bias connections and high-voltage stressing.[2][3]
What do the numbers mean?
Power & electrical2
Vacuum & pumping1
Control & software1
- Control modes
- Wet and dry bulb temperature control (M type), unsaturated control, wet saturated control[1]
Dimensions & facilities2
Configuration & options7
Vintage & configurations
What does it need to run?
Site utility requirements, footprint, and infrastructure needed to install and operate this tool. Sourced from public records.
Where are the manuals?
Generated from public-source data on file. Enter your email to access — nothing is published; details are routed privately.
Not publicly documented
Field notes
No research found yet — worked with this tool? Share what you know.
Frequently asked questions
What specimen size does the EHS-222M-L support?
The EHS-222M-L accommodates board sizes up to 290×460mm.[2]
How many bias terminals does the EHS-222M-L provide?
The EHS-222M-L provides up to 120 bias terminals.[2]
What maximum bias voltage is supported?
The EHS-222M-L supports bias voltage up to 1,000V.[2]
What environmental ranges does the EHS-222M-L cover?
The EHS-222M-L operates across +105.0°C to +142.9°C, 75% to 100%RH, and 0.019 to 0.193MPa.[2][3]
What kinds of products is the EHS-222M-L intended to test?
The EHS-222M-L is intended for large multilayer PCBs, high-density electronic assemblies, AI hardware, automotive electronics, and data center systems.[2]
Not publicly documented
The following facts about the EHS-222M-L are absent from this record as of this revision. First-hand knowledge or a citation closes a gap; every submission is reviewed before publication.
No publicly documented production dates or lifecycle milestones (introduction, end of production, EOL) for the EHS-222M-L are on record.
Answerable by: OEM historical records or a trade-press announcement
The control-system platform and OS era of the EHS-222M-L are not on record.
Answerable by: an engineer who operated it or OEM installation records
No publicly documented failure modes or field errata for the EHS-222M-L are on record.
Answerable by: a field service engineer, process engineer, or maintenance technician
The process node or technology generation of the EHS-222M-L is not on record.
Answerable by: an OEM datasheet or a fab qualification report
No publicly documented compatible parts, consumables, or accessories for the EHS-222M-L are on record.
Answerable by: an OEM parts catalog or a service engineer
No research found yet — worked with this tool? Share what you know.
Sources & citations
Sources (3)Every fact above is drawn from these public sources
- [1]espec.co.jp — espec.co.jpespec.co.jp
- [2]circuitsassembly.com — circuitsassembly.comcircuitsassembly.com
- [3]ESPEC HAST System EHS-222M-L for AI Semiconductors and Automotive Electronics | エスペック株式会社＿ESPEC CORP. posted on the topic | LinkedIn — linkedin.comlinkedin.com
Last updated Oct 11, 2026.
