Environmental Test Standards Explained: Matching IEC, ASTM, and MIL-STD to Your Products
1. Temperature Cycling & Thermal Shock
IEC 60068-2-14: -40°C to +85°C range, 3°C/min ramp rate, for aerospace PCBs, automotive sensors.
JESD22-A104: -55°C to +125°C, 500 cycles, targeting semiconductor device reliability.
2. Steady-State & Cyclic Humidity
IEC 60068-2-78: 40°C, 93%RH for 21 days; typical for consumer electronics and enclosures.
IEC 60068-2-30: 25/55°C cyclic, high humidity, used in automotive interior electronics.
JESD22-A101: Bias voltage + humidity for ICs.
3. Salt Fog & Corrosion
ASTM B117: 35°C salt spray for 96–1000 hours, general corrosion testing for coatings and metals.
IEC 60068-2-52: Cyclic salt mist simulating coastal environments.
4. Military-Grade Environmental Tests
MIL-STD-810H Method 507.6: Humidity cycles at 30–60°C for rugged field devices.
MIL-STD-810H Methods 501/502: High and low temperature extremes for portable defense electronics.
Table: Standard–Product–Condition Mapping
| Standard | Type | Range/Condition | Products |
|---|---|---|---|
| IEC 60068-2-14 | Thermal Cycling | -40°C~+85°C, 3°C/min | Aerospace PCBs |
| JESD22-A104 | Temp Cycling | -55°C~+125°C, 500 cycles | ICs |
| IEC 60068-2-78 | Steady Humidity | 40°C, 93%RH, 21 days | Consumer Electronics |
| ASTM B117 | Salt Spray | 35°C salt fog, 96–1000 hrs | Marine Equipment |
