Cooper Bussmann BRICK 6125TD - Manual (Page 30)

Title: Engineering Product Specification Telecom Circuit Protector Revision: L
Printed on: 7/14/2003 Sheet 16 of 18
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.
13. ENVIRONMENTAL (RELIABILITIY / QUALIFICATION) DATA
13.1 Life Test:
MIL-STD-202, Method 108A, Test Condition D
13.2 Load Humidity Test:
MIL-STD-202, Method 103B except:
13.2.1 Environmental chamber 85%+2% relative humidity at 85 ° C+2 ° C
13.2.2 100% of rated DC current, at any voltage less than or equal to rated voltage for 1000 hours
13.2.3 At 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%.
13.2.4 After 1000 hours is completed, samples are split into two equal lots.
13.2.5 One group is tested to the non-destructive 100% Current Carry Test. After current carry test is
complete, half of the samples are subjected to the Maximum Current Carry Test with the
remaining samples subjected to the Time Current Characteristic Curve Generation.
13.2.6 The other group is tested to the destructive Current Overload Test.
13.3 Moisture Resistance Test:
MIL-STD-202, Method 106E except:
13.3.1 Samples are placed in a temperature/moisture chamber and subjected to 50 cycles.
13.3.2 Temperature and humidity measurements are recorded at 0 cycles, 25 cycles, and 50 cycles.
13.3.3 At 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%,
13.3.4 One cycle is:
1) Start at 90-100% RH and 25 ° +2 ° C
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 80-100% RH
5) Ramp back up to 65
°
C+2
°
C within 2 ½ hours with 90-100% RH
6) Remain at 65
°
C+2
°
C for 3 hours
7) Ramp down to 25
°
C+2
°
C within 2 ½ hours with 80-100% RH
8) Remain at 25
°
C+2
°
C for 8 hours with 90-100% RH
13.3.5 Samples are split into two equal lots
13.3.6 One set is tested to the non-destructive 100% Current Carry Test. After completion, the samples
are subjected to the Time Current Characteristic Curve Generation.
13.3.7 The other set is subjected to the destructive Current Overload Test
13.4 Terminal 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%)