Reliability Test Item for VFD
Futaba VFDs are designed and manufactured to satisfy the reliability tests shown in the below table. 108hour of MTTF was confirmed in accordance with field experience. Luminance life expectancy is designed to satisfy the requirements of the application fully. For consumer application, the life expectancy is estimated more than 30000 hours.
○：Applicable ×：Not Applicable
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Test Item |
Test Conditions |
Application |
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| Application | Automotive Use | |||
| Function Durability | Life | Lighted for 1,000 hours at room temperature with applying the rated voltage. |
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| Vibration Fatigue | Lighted 4.4G acceleration, 2,000 cpm vibration applied for 4 hours in the X and each 2 hours in the Y and Z directions. |
× |
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| High Temperature Operation | Lighted for the period of 96 hours at 85±2℃. |
× |
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| Low Temperature Operation | Lighted for the period of 96 hours at －40 ±3℃. |
× |
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| Temperature Cycling | Lighted, subject to the specified test conditoin as shown for 5 cycles. |
× |
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| Heater Cycling | Filament voltage at 120% of the rated voltage and 20,000 cycles without voltage applied to anode and grid. |
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| Environment Test | High Temperature Storage | Unlighted, subject at 85±2℃ for the period of 72 hours. |
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| Low Temperature Storage | Unlighted, subject at －40±3℃ for the period of 72 hours. |
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| Thermal Shock | Unlighted, subject to the specified test condition as shown for 5 cycles. |
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| Humidity(Steady State) | Unlighted, subject to a relative humidity of 90 to 95% and a temperature of 40±2℃ for the period 96 hours. |
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| Physical Characteristicst | Vibration(1) | Unlighted, 1.5mm total excursion, 10～55Hz frequency, sweep time cycle 1 minute vibration applied for 2 hours in each X, Y, and Z directions. |
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| Vibration(2) | Unlighted, 4G acceleration, 55～200Hz frequency, sweep time cycle 10 minutes vibration applied for 2 hours in each X, Y, and Z directions. |
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| Shock | Unlighted, 100G maximum acceleration, 6ms duration time, half sine wave 3 times in each X, X', Y, Y', and Z, Z'directions(18 times in total in unlightedstate). |
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| Solderability | Immerse in a 230±5℃ solder pot for 5 seconds. |
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| Resistance to Soldering Heat | Immerse in a 280 ±5℃ solder pot for 30 ±2 seconds. |
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| Terminal Strength | A 250g weight, bend 90°and then return to original position, 3 cycles. |
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