Environmental Testing MIL STD - 202H : 2015

MIL-STD-202H serves as the definitive Department of Defense benchmark for testing the durability of electronic and electrical component parts. Unlike system-level standards, this protocol rigorously evaluates how individual components—such as capacitors and relays—withstand harsh natural elements and military-grade physical stress. By validating against these test methods, manufacturers demonstrate that their components can survive the extreme realities of defense and aerospace operations.

• Environmental Resilience: Verifies resistance to moisture, salt atmosphere, and thermal shock.
• Physical Durability: Assesses structural integrity under vibration and high-impact mechanical shock.
• Electrical Stability: Ensures consistent performance (DC resistance, dielectric strength) after exposure to stress.
• Defense & Aerospace Compliance: Mandatory for components integrated into military hardware and high-reliability industrial systems.

Standard: MIL-STD-202H : 2015 (Department of Defense Test Method Standard: Electronic and Electrical Component Parts). Status: Active / Current. Revision Note: This version (Revision H) was issued on April 18, 2015, and supersedes the previous Revision G. It is the governing document for all new component qualification programs requiring military-grade verification.

This standard is specifically designed for component parts weighing up to 300 pounds. It does not apply to complex systems (like entire servers or vehicles), but rather the fundamental building blocks of electronics:

• Passive Components: Capacitors, Resistors, Inductors, and Transformers.
• Electromechanical Parts: Relays, Switches, Connectors, and Circuit Breakers.
• Protection Devices: Fuses and Insulators.
• RF Components: Attenuators and Waveguides.

Our testing scope covers the critical "100-Series" Environmental Tests defined within MIL-STD-202H, simulating the most destructive natural forces a component will face:

• Salt Atmosphere (Method 101): Corrosion resistance testing for naval/coastal applications.
• Humidity & Moisture Resistance (Method 103/106): Evaluating electrical failure risks in tropical or damp environments.
• Thermal Shock (Method 107): Testing seal integrity by rapid cycling between extreme high and low temperatures.
• Sand and Dust (Method 110): Assessing ingress protection against fine desert particulates.
• Life Testing (Method 108): Elevated temperature endurance to predict component longevity.

To ensure your test report is accepted by Defense contractors and Global OEMs, testing is conducted strictly under ISO/IEC 17025 accredited quality management systems.

• ILAC MRA Signatories: Reports are issued by NABL or A2LA accredited laboratories.
• Traceability: All environmental chambers and measurement equipment are calibrated with traceability to National Standards.

Timelines for MIL-STD-202H vary significantly based on the specific "Method" chosen, as some tests are time-fixed by the standard itself.

• Standard Environmental Tests (Shock/Vibration): 5 – 7 working days.
• Duration-Based Tests:
• Salt Spray: 48 to 96 hours (plus reporting time).
• Moisture Resistance: 10 days continuous cycling.
• Life Testing: Can range from 100 to 1,000+ hours depending on client specifications.
• Expedited services are available for time-critical defense bids.

The number of samples depends on whether the selected test method is Destructive or Non-Destructive.

• Typical Requirement: 10 to 15 samples per specific test method.
• Control Units: We recommend providing 2 extra "Golden Samples" for baseline comparison.
• Mounting: If specialized fixtures are required to mount the component in the chamber (e.g., specific torque for switches), please provide mounting accessories.

Costs are calculated based on the "Test Method" and the duration of chamber occupancy.

• Variable Factors: A 96-hour Salt Spray test costs more than a 48-hour test due to chamber time. Complex fixture fabrication for vibration testing may incur additional tooling charges.
• Volume Discounts: Testing multiple component SKUs simultaneously can significantly reduce the cost per unit.
• Contact us with your specific "Method Number" (e.g., Method 107) for an instant quote.

To initiate the testing process and ensure the correct parameters are applied, the following documents are required:

1. Technical Datasheet: detailing the component's rated voltage, current, and operating temperature range.
2. General Arrangement (GA) Drawing: To assist in fixture planning.
3. Test Specification Sheet: Clearly listing the specific Method Numbers and Test Conditions (e.g., "Method 101, Test Condition B").