© 2015 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 11/04/15
Metal-Oxide Varistors (MOVs)
High Reliability Varistors
Table 4. Quality Assurance Acceptance Tests
Screen
MIL-STD-750
Method
Condition TX Requirements
High Temperature Life
(Stabilization Bake)
1032 24 hours min at max rated storage temperature. 100%
Thermal Shock
(Temperature Cycling) 1051
No dwell is required at 25°C. Test condition A1, 5 cycles -55°C to +125°C
(extremes) >10 minutes.
100%
Humidity Life 85°C, 85% RH, 168 Hrs. 100%
Interim Electrical V
N(DC)
V
C
(Note 3)
As specified, but including delta parameter as a minimum. 100% Screen
Power Burn-In 1038 Condition B, 85°C, rated V
M(AC)
, 72 hours min. 100%
Final Electrical +V
N(DC)
V
C
(Note 3)
As specified - All parameter measurements must be completed within 96
hours after removal from burn-in conditions.
100% Screen
External Visual
Examination
2071 To be performed after complete marking. 100%
3) Custom Types
In addition to our comprehensive high-reliability series, Littelfuse can screen and condition to specific requirements.
Additional mechanical and environmental capabilities are defined in Table 5.
Table 5. Mechanical And Environmental Capabilities (Typical Conditions)
Test Name Test Method Description
Terminal Strength MIL-STD-750-2036 3 Bends, 90° Arc, 16oz. Weight
Drop Shock MIL-STD-750-2016 1500g’s, 0.5ms, 5 Pulses, X
1
, V
1
, Z
1
Variable Frequency Vibration MIL-STD-750-2056 20g’s, 100-2000Hz, X
1
, V
1
, Z
1
Constant Acceleration MIL-STD-750-2006 V
2
, 20,000g’s Min
Salt Atmosphere MIL-STD-750-1041 35°C, 24Hr, 10-50g/m
2
Day
Soldering Heat/Solderability MIL-STD-750-2031/2026 260°C, 10s, 3 Cycles, Test Marking
Resistance to Solvents MIL–STD–202-215 Permanence, 3 Solvents
Flammability MIL–STD–202-111 15s Torching, 10s to Flameout
Cyclical Moisture Resistance MIL–STD–202-106 10 Days
Steady-State Moisture Resistance MIL–STD–750-1021.3 85/85 96Hr
Biased Moisture Resistance MIL–STD–750-1021.3 Not Recommended for High-Voltage Types
Temperature Cycle MIL–STD–202-107 -55°C to 125°C, 5 Cycles
High-Temperature Life (Nonoperating) MIL-STD-750-1032 125°C, 24Hr
Burn-In MIL-STD-750-1038 Rated Temperature and V
RMS
Hermetic Seal MIL-STD-750-1071 Condition D
