Title: Engineering Product Specification Telecom Circuit Protector | Revision: L |
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Printed on: 7/14/2003 | Sheet 16 | of | 18 |
13. ENVIRONMENTAL (RELIABILITIY / QUALIFICATION) DATA
13.1 Life Test:
13.2 Load Humidity Test:
13.2.1Environmental chamber 85%+2% relative humidity at 85°C+2°C
13.2.2100% of rated DC current, at any voltage less than or equal to rated voltage for 1000 hours
13.2.3At 168h, 504h, and completion of test, the power is turned off. Resistance readings are taken
after temperature stabilization. Change in resistance from the original value is calculated and recorded. ∆R<10%.
13.2.4After 1000 hours is completed, samples are split into two equal lots.
13.2.5One group is tested to the
13.2.6The other group is tested to the destructive Current Overload Test.
13.3Moisture Resistance Test:
13.3.1Samples are placed in a temperature/moisture chamber and subjected to 50 cycles.
13.3.2Temperature and humidity measurements are recorded at 0 cycles, 25 cycles, and 50 cycles.
13.3.3At the completion of 50 cycles.
Samples are stabilized at 25°C+5°C for a minimum of 15 minutes and a maximum of 24 hours. The change in resistance from the original value is calculated and recorded. ∆R<10%,
13.3.4One cycle is:
1)Start at
2)Ramp up to 65°C+2°C within 2 ½ hours
3)Remain at 65°C+2°C for 3 hours
4)Ramp down to 25°C+2C within 2 ½ hours with
5)Ramp back up to 65°C+2°C within 2 ½ hours with
6)Remain at 65°C+2°C for 3 hours
7)Ramp down to 25°C+2°C within 2 ½ hours with
8)Remain at 25°C+2°C for 8 hours with
13.3.5Samples are split into two equal lots
13.3.6One set is tested to the
13.3.7The other set is subjected to the destructive Current Overload Test
13.4Terminal Strength Test:
Downward force is applied to cause a 1mm deflection for 1 minute (no physical evidence of mechanical or physical damage, change in resistance < 5%)
This bulletin is intended to clearly present comprehensive product data and provide technical information that will help the end user with design applications. Bussmann reserves the right, without notice, to change design or construction of any products and to discontinue or limit distribution of any products. Bussmann also reserves the right to change or update, without notice, any technical information contained in this bulletin. Once a product has been selected, it should be tested by the user in all possible applications.
