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Class B is outlined in MIL-F-28861 and is prescribed for
most military/aerospace requirements. It is more stringent
than MIL-F-15733 requiring 100% screening that includes
thermal shock, voltage conditioning and x-ray.
Periodic Group B testing is performed on units selected
at random from production lots.
Class B testing is performed on every production lot of EMI Filters and Capacitors
Class B Test Sequence Summary
Group II
- Voltage and temperature limits of capacitance
- Insertion loss: @ 25°C, +125°C, -55°C
- AC voltage drop: (AC rated parts only)
- Temperature rise
- Barometric pressure
- Insulation resistance: @ 25°C and 125°C
- Overload: Apply 140% of rated current for 15 minutes
- Resistance to solvents
Group III
- Vibration: 3 planes
- Vibration: (random) 3 planes
- Thermal shock: 5 cycles
- Seal test
- Resistance to solder heat
- Salt spray
- X-ray inspection
Group IV
- Shock
- Terminal strength
- Thermal shock
- Seal
- X-ray inspection
Group V
Group VI
Performance Tests
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