Key Advantages:
Accelerated stress testing under high temperature and high humidity
Typical test conditions up to 130°C / 85% RH / 2–3 atm pressure
Significant reduction in testing time compared to standard humidity testing
Excellent sealing performance for pressure stability( 0.1 MPa to 0.3 MPa (1–3 atm))
High-precision temperature and humidity control
Compliant with JESD22-A110, JESD22-A102, IEC 60068
Designed for continuous and repeatable reliability testing
Key Specifications of HAST Test Chamber:
| Serial number | Capacity ( m3 ) | 0.018 | 0.048 | 0.088 | 0.199 | |
| 1 | Model | HAST Pressure Accelerated Aging Test Chamber | EQ-PCT-18 | EQ-PCT-48 | EQ-PCT-88 | EQ-PCT-199 |
| 2 | Internal Dimensions (Diameter ×D)mm | Ф300x250 | Ф450x300 | Ф500x450 | Ф650x600 | |
| 3 | External Dimension WxHxD (mm) | 500x500x700 | 580x850x650 | 800x750x900 | 950x900x1100 | |
| 4 | Steam Temperature Range | +110C to +135℃ | ||||
| 5 | Temperature Fluctuation | ≤ ± 0.5℃ | ||||
| 6 | Temperature Uniformity | ≤ 1.5℃ | ||||
| 7 | Humidity Range | 100%R.H Saturated vapor Or: 70 ~100%R.H (Steam humidity adjustable) | ||||
| 8 | Humidity Uniformity | ± 1.5% RH | ||||
| 9 | Humidity Uniformity | ± 3.0% RH | ||||
| 10 | Pressure range | 0 to +2 kg/cm² (Operational range: 0 to +3 kg/cm²) Absolute Pressure Range: 1.0-3.0 kg/cm² Safety Pressure Capacity: 4 kg/cm² Equal to 1 atmospheric pressure + 3 kg/cm² gauge pressure | ||||
| 11 | Circulation Mechanism | Natural convection of water vapor | ||||
| 12 | Test Time Setting | Programmable duration: 0-999 hours | ||||
| 13 | Pressurization Time | Achieves 0.00→2.00 kg/cm² in ≈30 min (non-linear ramp under no-load conditions) | ||||
| 14 | Temperature Ramp Profile | Ambient→132℃ in ≈30 min (air temperature-based control, not product temperature) | ||||
| 15 | Safety Protections | Dual-mode Water Management (Automatic/manual water replenishment, Automatic pressure relief) Critical Safeguards （Low-water cutoff protection，Overpressure interlock） | ||||
| 16 | Power | AC220V; 1phase 3 lines ; 50/60HZ AC380V; 3phase 5 lines ; 50/60HZ | ||||
Opening:
The HAST Test Chamber (Highly Accelerated Stress Test Chamber) is an advanced reliability testing system used to evaluate electronic components, semiconductor packages, and electronic devices under accelerated temperature, humidity, and pressure stress conditions.
By creating a highly controlled high-temperature and high-humidity environment with elevated pressure, HAST testing accelerates moisture penetration, corrosion reactions, and insulation degradation mechanisms. This allows engineers to detect potential reliability risks, validate product durability, and improve failure analysis efficiency before mass production.
HAST chambers are widely applied in semiconductor manufacturing, IC packaging, PCB reliability evaluation, automotive electronics, and electronic component qualification programs.
What is HAST Testing?
A HAST Chamber is an environmental reliability testing system that simulates severe temperature, humidity, and pressure conditions to accelerate moisture-related failure mechanisms in electronic devices.
Compared with traditional 85°C/85%RH (85/85) temperature humidity testing, HAST applies higher temperature and pressure conditions to significantly accelerate moisture stress testing, helping engineers identify defects such as corrosion, delamination, insulation resistance degradation, and package reliability issues within a shorter evaluation period.
TestEQ HAST Test Chamber is engineered for semiconductor, IC packaging, and electronic component reliability validation. Supporting JESD22-A110 HAST testing requirements, the system provides precise control of temperature, humidity, and pressure to help reliability engineers detect hidden failure risks and improve product qualification efficiency.
How to Choose a HAST Test Chamber for Semiconductor Reliability Testing?
Selecting the right HAST test chamber requires evaluating testing standards, temperature and humidity control, pressure capability, chamber capacity, and system reliability. A suitable system should support standards such as JESD22-A110 and IEC 60068 while providing stable high-temperature, high-humidity, and pressure conditions for repeatable semiconductor reliability testing. Engineers should also consider safety features, control accuracy, sample compatibility, and manufacturer support to ensure reliable test results for IC packages, electronic components, and advanced semiconductor applications.
HAST vs Temperature Humidity Testing:
| Feature | HAST Testing | Temperature Humidity Test |
|---|---|---|
| Temperature | Higher (110–130°C) | Lower (85°C typical) |
| Pressure | Elevated | Normal |
| Test Time | Short (hours–days) | Long (weeks–months) |
| Application | Semiconductor | General electronics |
| HAST | THB | |
|---|---|---|
| Pressure | High | Atmospheric |
| Duration | Short | Long |
| Failure Mode | Moisture penetration | Bias corrosion |
| Application | IC package | Electronic components |
Designed for Semiconductor Reliability:
HAST testing is critical for identifying:
Moisture ingress failures
Corrosion of metal interconnects
Delamination in IC packaging
Insulation breakdown
Electrochemical migration
It is widely required in JEDEC qualification standards for semiconductor devices.
Why Choose TestEQ:
Specialized in high-end environmental test chambers
Proven experience in semiconductor & electronics testing
Advanced pressure and sealing system design
Stable long-duration operation under extreme conditions
Custom engineering support for global standards compliance
Optional Configurations:
Biased HAST (with electrical loading)
Unbiased HAST mode
Automatic pressure control system
Data logging & remote monitoring
Multi-sample testing fixtures
Custom chamber sizes and layouts
Standards Supported:
1.Global Electronics:
•JEDEC JESD22-A110 (HAST), IPC-9701 (Board-Level Reliability).
2.Automotive:
•AEC-Q100/101/200, ISO 16750-2 (Humidity Resistance).
3.Military:
•MIL-STD-202 (Method 106), MIL-STD-750 (Method 1021).
4.Sustainability:
•Compliant with EU RoHS 2025/09 (hazardous substance limits) and China GB/T 2423.40-2025.
FAQ:
1. What is a HAST test chamber?
A HAST test chamber is used to perform highly accelerated stress testing under high temperature, humidity, and pressure to evaluate product reliability.
2. What is the difference between HAST and 85/85 testing?
HAST uses higher temperature and pressure, significantly reducing test time compared to standard 85°C / 85% RH testing.
3. What industries use HAST testing?
Industries include semiconductor, electronics, automotive, and telecommunications.
4. What standards does HAST comply with?
It complies with JESD22-A110, JESD22-A102, and IEC 60068 standards.
5. What is biased vs unbiased HAST?
Biased HAST applies electrical voltage during testing
Unbiased HAST does not apply electrical load
6. What temperature and humidity conditions are used in HAST testing?
HAST testing typically uses high temperature, high humidity, and elevated pressure conditions. Common test conditions include 110°C to 130°C temperature, 85% relative humidity or saturated vapor environments, and pressure levels above atmospheric pressure to accelerate moisture-related failure mechanisms.
7. What is the difference between HAST and PCT testing?
HAST and PCT both evaluate moisture resistance under high temperature and humidity conditions. The main difference is that HAST testing can apply electrical bias during testing and is commonly used for semiconductor reliability evaluation, while PCT (Pressure Cooker Test) mainly focuses on moisture resistance without electrical stress.
8. How do I choose the right HAST test chamber for semiconductor reliability testing?
When selecting a HAST test chamber, engineers should consider testing standards, temperature and pressure range, chamber capacity, control accuracy, safety functions, and compatibility with reliability requirements such as JESD22-A110. A suitable system should provide stable temperature, humidity, and pressure control for repeatable semiconductor reliability testing.
Internal Linking Module
Recommended Equipment
A standard environmental chamber designed for temperature and humidity reliability testing. It is widely used for 85°C/85% RH aging tests and long-term moisture resistance evaluation of electronic components.
Designed for Environmental Stress Screening (ESS), this system helps identify latent defects in electronics and semiconductor products through accelerated thermal cycling and environmental stress testing.
Related Standards
A complete guide to the JEDEC JESD22-A110 standard, covering HAST test conditions, failure mechanisms, pressure requirements, and semiconductor qualification procedures.
Learn the fundamentals of IEC 60068 environmental testing methods for temperature, humidity, vibration, and combined stress reliability evaluation.
Technical Resources
Understand how Highly Accelerated Stress Testing works and how HAST chambers accelerate moisture-induced failures for semiconductor and electronics reliability validation.
Compare HAST and Temperature Humidity Bias (THB) testing in terms of pressure, duration, failure mechanisms, and application scenarios to select the right reliability test method.
Applications:
The HAST test chamber is widely used in:
Semiconductor Reliability Testing
Evaluate IC packages and semiconductor devices under high temperature, humidity and pressure stress to identify moisture-related failures.
PCB and Electronic Assembly Testing
Validate PCB assemblies and electronic components against moisture penetration, corrosion and insulation degradation risks.
Automotive Electronics Validation
Support reliability testing of ECUs, sensors, power modules and automotive electronic components for harsh environments.
LED and Optoelectronic Device Testing
Assess LED packages and optical devices for moisture resistance, corrosion protection and long-term performance stability.
Connector and Cable Reliability Testing
Test connectors, terminals and cable assemblies for corrosion resistance, insulation performance and moisture durability.
Moisture Resistance and Corrosion Testing
Accelerate moisture and corrosion failure analysis to improve product reliability and service life.
Call To Action:
Need Help Choosing Between HAST and THB Testing?
Our engineers can help you select the appropriate test method and chamber configuration based on your products, standards, and reliability requirements.
Get Expert Advice from TestEQ
Customized HAST and THB chamber solutions
Temperature range up to 150°C and humidity control up to 100% RH
Compliance with JEDEC and IEC standards
OEM and turnkey laboratory projects available
We will contact you within 1 working day, please pay attention to the email with
the suffix "@test-eq.com".
We will contact you within 1 working day, please pay attention to the email with the suffix "@test-eq.com".
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