WK202070C1001FD500 Datasheet, PDF (1/5 Pages) Vishay Siliconix – High Power Metal Oxide Leaded Resistors

WK/WR
Vishay Draloric
High Power Metal Oxide Leaded Resistors
FEATURES
• Rugged metal oxide film
• High power dissipation in small size (1 W/0207
size to 4 W/0922 size)
• High temperature coating (up to 200 °C),
non-flammable
• Lead (Pb)-free solder contacts
• Pure tin plating provides compatibility with lead (Pb)-free
and lead containing soldering processes
• Compliant to RoHS directive 2002/95/EC
STANDARD ELECTRICAL SPECIFICATIONS
MODEL
SIZE
RATED DISSIPATION
P₇₀
W
LIMITING ELEMENT
VOLTAGE U_max.
V≅
TEMPERATURE
COEFFICIENT
ppm/K
TOLERANCE
%
RESISTANCE
RANGE
E-SERIES
WK2
0207
1.0
500
± 50
±1
4.7 Ω to 1 MΩ E24, E96
WK2
0207
1.0
500
± 100
±2
4.7 Ω to 1 MΩ E24, E48
±5
4.7 Ω to 1 MΩ
E24
WK2
0207
1.0
500
± 200
±5
0.22 Ω to 1 MΩ
E24
WR4
0414
2.0
500
± 200
±2
1 Ω to 1 MΩ
E24, E48
±5
0.33 Ω to 1 MΩ
E24
WR5
0617
3.0
750
± 200
±2
1 Ω to 100 kΩ E24, E48
±5
0.22 Ω to 560 kΩ
E24
WK8
0922
4.0
750
± 200
±2
1 Ω to 68 kΩ
E24, E48
±5
0.22 Ω to 100 kΩ
E24
Notes
• Coating: Green
• Marking: WK2 and WR4 have color code band marking. TCR band will be given to only WK2, 100 ppm, 5 %. WR5 and WK8 are printed marked.
TECHNICAL SPECIFICATIONS
PARAMETER
UNIT
WK2
WR4
WR5
WK8
Rated Dissipation, P₇₀
Limiting Element Voltage, U_max.(1)
Insulation Voltage, U_ins (1 Min)
Thermal Resistance, R_th
Insulation Resistance
W
1.0
V≅
500
V
> 500
K/W
≤ 140
Ω
2.0
500
> 500
≤ 100
> 10⁹
3.0
750
> 500
≤ 70
4.0
750
> 500
≤ 60
Category Temperature Range ⁽²⁾
°C
- 55 to + 200
Failure Rate
10^-8/h
<1
Weight
g
0.2
0.7
1.5
3.5
Notes
(1) _{Rated Voltage P x R}
(2) _{For values < 10R the upper limiting temperature is 155 °C. The power rating is correspondingly lower and can be calculated by Rth.}
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For technical questions, contact: [e-mail]
Document Number: 20128
Revision: 26-May-10