WK2, WR4, WR5, WK8
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Vishay Draloric
Revision: 03-Mar-16
7
Document Number: 20128
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TESTS PROCEDURES AND REQUIREMENTS
All tests are carried out in accordance with the following
specifications:
• EN 60115-1, generic specification (includes tests)
The test and requirements table contains only the most
important tests. For the full test schedule refer to the
documents listed above.
The tests are carried out in accordance with IEC 60068-2-xx
test method and under standard atmospheric conditions in
accordance with IEC 60068-1, 5.3.
Climatic category -40 / 200 / 56 (rated temperature range:
lower category temperature, upper category temperature;
damp heat, steady state, test duration: 56 days) is valid.
Unless otherwise specified the following values apply:
• Temperature: 15 °C to 35 °C
• Relative humidity: 45 % to 75 %
• Air pressure: 86 kPa to 106 kPa (860 mbar to 1060 mbar).
For performing some of the tests, the components are
mounted on a test board in accordance with IEC 60115-1,
4.31.
In the Test Procedures and Requirements table, only the
tests and requirements are listed with reference to the
relevant clauses of IEC 60115-1 and IEC 60068-2-xx test
methods. A short description of the test procedure is also
given.
TEST PROCEDURES AND REQUIREMENTS
IEC 60115-1
CLAUSE
IEC 60068-2
TEST
METHOD
TEST PROCEDURE
REQUIREMENTS PERMISSIBLE
CHANGE (R
max.
)
4.13 - Short time overload
Room temperature;
P = 6.25 x P
n
;
(voltage not more than 2 x limiting voltage);
5 s
± (0.25 %R +0.05)
4.16
21 (Ua
1
)
21 (Ub)
21 (Uc)
Robustness of
terminations
Tensile, bending, and torsion
No damage
± (0.25 %R +0.05)
4.18 20 (Tb)
Resistance to
soldering heat
Unmounted components
(260 ± 5) °C; (10 ± 1) s
± (0.25 %R +0.05)
4.19 14 (Na)
Rapid change of
temperature
30min at -55 °C and
30min at +155 °C;
5cycles
± (0.25 %R +0.05)
4.20 29 (Eb) Bump 3x1500bumps in three directions; 40g
No damage
± (0.25 %R +0.05)
4.22 6 (Fc) Vibration
Frequency 10 Hz to 500 Hz;
displacement 1.5 mm or acceleration 10 g;
3 directions;
total 6 h (3 x 2 h)
No damage
± (0.25 %R +0.05)
4.23 Climatic sequence:
R
ins min.
: 1 G
± (0.5 % R +0.1)
4.23.2 2 (Ba) Dry heat 16 h; 155 °C
4.23.3 30 (Db)
Damp heat,
cyclic
24 h; 55 °C
90 % to 100 % RH; 1 cycle
4.23.4 1 (Aa)
1
st
cycle,
cold
2 h; -55 °C
4.23.5 13 (M) Low air pressure
2 h; 8.5 kPa
15 °C to 35 °C
4.23.6 30 (Db)
Damp heat,
remaining cyclic
5days; 55°C
95% to100 %RH; 5 cycles
4.23.7 30 (Db) DC load apply rated power for 1 min
4.24 78 (Cab)
Damp heat
(steady state)
56 days; 40 °C;
90 % to 95 % RH;
loaded with 0.01 P
70
(steps: 0 V to 100 V)
± (1.5 %R +0.1)
4.25.1 -
Endurance
(at70 °C)
1000 h; loaded with P
70
or U
max.
;
1.5 h ON and 0.5 h OFF
WK2, WR4, WR5 ± (5 % R + 0.1 )
WK8 ± (2 % R + 0.1 )
4.25.3 - Endurance at 200 °C 1000 h; without load
WK2, WR4 ± (5 % R + 0.1 )
WR5, WK8 ± (1 % R + 0.1 )
