Surface Insulation Resistance (SIR) Testing
The most effective when determining the cleanliness and reliability of electronic assemblies
Surface Insulation Resistance (SIR) testing evaluates the long-term reliability of electronic materials and processes by exposing circuits to controlled temperature, humidity, and electrical bias to identify potential failure mechanisms caused by electrochemical reactions. It assesses production process chemistries such as solder masks, flux, paste, and wire, as well as assembly processes like reflow, SMT parameters, and cleaning methods. High-temperature and humidity aging tests simulate years of service in days, providing critical insights into material integrity and reliability. With tailored test profiles, SIR testing helps predict service life, ensuring quality and durability in electronic assemblies.
Magnalytix SIR Test Board Designs are representative of today’s production hardware. The test boards are designed to assess SMT, Thru-Hole, Wave or Selective, and Manual Soldering. MGX offers the test boards as kits with all the components needed to assemble. The standard test board designs are in stock and ready for delivery upon receipt of your order.
MGX test boards have become the standard for SIR testing. The components selected are leadless and bottom-terminated, making the test boards ideal for qualifying and validating your assembly process.
Why Choose This Test?
- • Assesses leakage current from ionic or active residues
- • Detects electrochemical dendritic growth across conductors of opposite polarity
- • Identifies harmful residues during assembly that lower insulation resistance
- • Provides clear pass/fail metrics for process validation
- • Helps investigate root causes of failures and process variations
- • Tests for major process changes, including flux, cleaning agents, suppliers, and solder alloys