Aerospace PCB Calculator
Avionics | Space Systems | Defense | UAV
Calculate trace parameters for aerospace and defense electronics.
Aerospace Application Categories
| Application | Standards | Quality Level | Key Requirements |
|---|---|---|---|
| Commercial Avionics | DO-178C / DO-254 | DAL A-E | High reliability |
| Space (LEO) | ECSS / MIL-PRF-31032 | Class 3/A | Radiation tolerant |
| Deep Space | NASA/ESA specs | Class 3/A | Rad-hard, extreme temp |
| Defense | MIL-PRF-31032 | Class 3 | Ruggedized |
Aerospace PCB Requirements
Extreme Environment
Wide temperature range (-55°C to +125°C), altitude derating, vibration resistance. Use polyimide or high-Tg materials. Consider thermal cycling effects.
High Reliability
MIL-PRF-31032 Class 3/A. Extensive testing, screening, and qualification. Redundancy for critical systems. Conformal coating mandatory.
Certification
DO-254 for airborne electronics hardware. AS9100 quality management. ITAR compliance for defense applications. Full traceability required.
Aerospace PCB Materials
Common Aerospace Laminates
Material Requirements
• Tg > 170°C minimum for most applications
• Low CTE for thermal cycling reliability
• CAF (Conductive Anodic Filament) resistant
• Low outgassing for space (ASTM E595)
• QPL listed for MIL applications
Key Design Considerations
Trace Design
- • Conservative current derating (50-75% of max)
- • Wider traces for reliability margin
- • Teardrops at pad connections
- • Avoid sharp corners (45° or curved)
- • Controlled impedance per IPC-2141
Via Design
- • Filled and capped vias for reliability
- • Via-in-pad with proper fill
- • Thermal via arrays for heat dissipation
- • Avoid micro-vias in Class 3/A
- • Conservative current capacity calculations
High-Speed Signals
- • SpaceWire: 100Ω differential
- • MIL-STD-1553: 70-85Ω differential
- • Space-rated transceivers
- • Radiation-tolerant design patterns
- • Redundancy for critical paths
Quality & Testing
- • IPC-6012 Class 3/A fabrication
- • 100% electrical testing
- • Thermal cycling qualification
- • X-ray inspection of vias
- • Ionic contamination testing
Calculate Aerospace Trace Dimensions
Trace width and via current use the IPC-2221 empirical power law; impedance uses published single-ended approximations. Results are estimates, with the assumptions shown on each page.
Aerospace PCB FAQ
What fabrication class for space?
IPC-6012 Class 3 minimum, Class 3/A (space addendum) for critical missions. This specifies tighter tolerances, testing, and documentation requirements.
How do I handle radiation effects?
Use radiation-tolerant components, implement SEU mitigation (TMR, EDAC), consider shielding, and use proven radiation-tolerant design patterns.
What about outgassing requirements?
Space PCBs must meet ASTM E595 outgassing requirements. TML <1.0% and CVCM <0.1%. Choose materials from NASA outgassing database.
How much current derating for aerospace?
Typically 50-75% of IPC-2221 calculated values. More conservative for flight-critical systems. Always verify with thermal analysis.
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