WK_15 Datasheet, PDF (4/5 Pages) Vishay Siliconix – High Power Metal Oxide Leaded Resistors

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2000 ^{WR 5/WK8}
WR 4
WK 2
1000
Secondary Conditions:
a) P^–_max. see diagram below
b) See diagram below
c) ϑu ≤ 70 °C
WK/WR
Vishay Draloric
0
10^-5
10^-4
10^-3
10^-2
MAX. PULSE VOLTAGE
10^-1
10⁰
10
SQUARE PULSE t_i [s]
130
10
WR4
120
WR5/WK8
1
110
WR5/WK8
100
0.1
WR4
90
1K
10K
NON-LINEARITY
100K
1M
10M
RESISTANCE VALUE IN Ω
0.01
10K
100K
CURRENT NOISE
1M
10M
RESISTANCE VALUE IN Ω
PERFORMANCE
TEST
CONDITIONS OF TEST
Rated Dissipation, P₇₀
IEC 60115-1, 4.25.1
1000 h at 70 °C 1.5 h ON, 0.5 h OFF
Endurance at UCT 
IEC 60115-1, 4.25.3
1000 h at 200 °C without load
Overload Test 
IEC 60115-1, 4.13
Short time overload 5 s at 2.5 x rated voltage or  ± twice the limiting
element voltage
Thermal Shock
IEC 60115-1, 4.19
Rapid change between upper and lower category temperature
Climatic Sequence 
IEC 60115-1, 4.23
Dry heat, damp heat cycle, cold, low air pressure
Damp Heat Steady State
IEC 60115-1, 4.24
56 days; 40 °C; 90 % to 95 % RH; loaded with 0.01 P₇₀
Resistance to Soldering Heat 
IEC 60115-1, 4.18
10 s at 260 °C solder bath temperature
Robustness of Terminations 
IEC 60115-1, 4.16
Tensile, bending and torsion
Vibration 
IEC 60115-1, 4.22
Frequency 10 Hz to 500 Hz; displacement 1.5 mm or
acceleration 10 g; three directions; 6 h
Note
(1) _{Limits for change of resistance at test}
APPLICABLE SPECIFICATIONS
• EN140100, EN60115-1, IEC 60115-1
REQUIREMENTS
(R MAX.) ⁽¹⁾
WK2  ± (5 % R + 0.1 )
WK8  ± (2 % R + 0.1 )
WR4, WR5  ± (5 % R + 0.1 )
WK2, WR4  ± (5 % R + 0.1 )
WR5, WK8  ± (1 % R + 0.1 )
 ± (0.25 % R + 0.05 )
 ± (0.25 % R + 0.05 )
 ± (0.5 % R + 0.1 )
 ± (1.5 % R + 0.1 )
 ± (0.25 % R + 0.05 )
 ± (0.25 % R + 0.05 )
 ± (0.25 % R + 0.05 )
Revision: 29-Oct-14
4
Document Number: 20128
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