SPACE TESTING FLOW CHART
Qualifying Magnetics for Space Applications
Comprehensive Testing Sequence for MIL-STD-981 Class “S” Compliance
At Vanguard Electronics, we are committed to ensuring that our magnetic components meet the stringent requirements for space applications. Here is a detailed overview of the testing sequence required to qualify magnetics for use in space, as outlined in the MIL-STD-981 Class “S” standards.ost accurate and comprehensive information to ensure the successful integration of our high-reliability inductors and transformers into various applications. Our application notes are designed to offer in-depth guidance and technical insights, helping you make informed decisions and optimize the performance of your systems.
Understanding MIL-STD-981 Class “S”
MIL-STD-981 Class “S” is a rigorous standard for space applications, ensuring that components can withstand the harsh conditions of space. The testing sequence is divided into two main groups: Group A and Group B, each with specific subgroups.
Group A: Inspection & Tests
Subgroup I (100% of Units)
- DC Resistance: Measure the direct current resistance to ensure it meets the specified values.
- Thermal Shock: Subject the components to 25 cycles of thermal shock to test their durability under extreme temperature variations. Monitor continuity during the last cycle.
- Radiographic Inspection: Perform X-ray inspections to check for any internal defects or anomalies.
- No Load Burn-In: Conduct a 96-hour no-load burn-in at the maximum operating temperature (MOT) to stress the component and identify any potential failures.
- Dielectric Withstanding Voltage: Test the dielectric strength to ensure the component can withstand high voltages without breakdown.
- Insulation Resistance: Measure the insulation resistance to verify that it meets the required standards.
- Inductance, Q, DCR, SRF: Measure inductance, quality factor (Q), direct current resistance (DCR), and self-resonant frequency (SRF) to ensure electrical performance.
- Visual & Mechanical Inspection: Conduct a visual and mechanical inspection to check for any physical defects or damage.
Group B: Inspection & Tests
Subgroup I (Sample 2 Units)
- Initial Electrical Tests: Perform initial electrical tests to baseline the component’s performance.
- Low Temperature Operation: Test the component’s operation at low temperatures to ensure functionality.
- Temperature Rise: Measure the temperature rise during operation to ensure it is within acceptable limits.
- Overload Test: Subject the component to an overload test to verify its ability to handle excessive current or voltage.
- Moisture Resistance: Test the component’s resistance to moisture to ensure it can operate reliably in humid environments.
- Inductance & Q: Measure inductance and Q at different temperatures to ensure stability.
- High Temperature Exposure: Expose the component to high temperatures to test its thermal stability.
- Final Electrical Tests: Conduct final electrical tests after all other tests to ensure the component still meets the required specifications.
- Bond Strength: Test the bond strength between the windings and the core to ensure mechanical integrity.
- Solderability: Verify the solderability of the component to ensure it can be reliably soldered onto a PCB.
Subgroup I (Sample 2 Units)
- Operational Life Test: Conduct a 2000-hour operational life test at the maximum operating temperature (MOT) to evaluate the component’s long-term reliability.
- Final Electrical Tests: Perform final electrical tests after the operational life test to ensure the component still meets the required specifications.
Why Choose Vanguard Electronics?
At Vanguard Electronics, we are dedicated to providing high-reliability magnetic components that meet the most stringent standards for space applications. Our comprehensive testing sequence ensures that our components can withstand the harsh conditions of space, providing you with the confidence you need for your mission-critical systems.
Contact Us Today
For more information on our space testing flow chart or to discuss your specific requirements, please contact our experienced engineering team. We are committed to helping you achieve the highest performance and reliability in your space applications.