Why are my components not passing SURG?
The Surge test (SURG mnemonic) applies a shot pulse(s) to the DUT and measures the decay characteristic due to this pulse. A shorter decay time and low SURG result is an indication of a shorted turn or insulation breakdown.
A good part is generally compared with a known bad part and the decay time (Volt-seconds) is then used as a test limit to select good parts.
If a part fails a SURG test the following may apply:
1. The part may have flashed over during the test, this may result in an AT3600 error message.
2. The part may have a shorted turn or has a compromised winding insulation.
3. Test conditions were changed slightly in models pre 1999 and if test limits were made using an older model results may be different with models sold after 1999. Please refer to Thread 1594 for details of this.
4. The SURG test voltage may be too high for the DUT