CHIP
RESISTORS
www.vishay.com For technical questions, contact: efi@vishay.com
Document Number: 61021
62 Revision: 12-Mar-08
PWB
Vishay Electro-Films
Thin Film Power Resistors
The PWB series resistor chips offer a 1 W power rating in a
relatively small size. They offer one of the best combinations
of size and power available.
The PWBs are manufactured using Vishay Electro-Films
(EFI) sophisticated thin film equipment and manufacturing
technology. The PWBs are 100 % electrically tested and
visually inspected to MIL-STD-883.
FEATURES
• Wire bondable
• Power: 1 W
• Chip size: 0.070 inches square
• Resistance range: 0.3 Ω to 20 kΩ
• Oxidized silicon substrate for good power dissipation
• Resistor material: Tantalum nitride, self-passivating
APPLICATIONS
The PWB resistor chips are used mainly in higher power circuits of amplifiers where increased power loads require a more
specialized resistor.
Product may not
be to scale
TEMPERATURE COEFFICIENT OF RESISTANCE, VALUES AND TOLERANCES
PROCESS CODE
CLASS H* CLASS K*
001 005
000 004
008 009
*MIL-PRF-38534 inspection criteria
± 250 ppm/°C
± 50 ppm/°C
± 100 ppm/°C
0.5 %
20 kΩ50 Ω0.3 Ω 2 Ω 10 Ω 10 kΩ
1 %5 %
Tightest Standard Tolerance Available
* ± 600 ppm/C R < 2 Ω
*
STANDARD ELECTRICAL SPECIFICATIONS
PARAMETER
Noise, MIL-STD-202, Method 308
100 Ω - 250 kΩ
< 100 Ω or > 251 kΩ
- 35 dB typ.
- 20 dB typ.
MoistureResistance, MIL-STD-202
Method 106
± 0.5 % max. ΔR/R
Stability, 1000 h, + 125 °C, 500 mW ± 0.5 % max. ΔR/R
Operating Temperature Range - 55 °C to + 125 °C
Thermal Shock, MIL-STD-202,
Method 107, Test Condition F
± 0.1 % max. ΔR/R
High Temperature Exposure, + 150 °C, 100 h ± 0.2 % max. ΔR/R
Dielectric Voltage Breakdown 200 V
Insulation Resistance 10
12
min.
Operating Voltage
Steady State
5 x Rated Power
100 V max.
200 V max.
DC Power Rating at + 70 °C (Derated to Zero at + 175 °C)
(Conductive Epoxy Die Sttach to Alumina Substrate)
1 W
5 x Rated Power Short-Time Overload, + 25 °C, 5 s ± 0.25 % max. ΔR/R %
