PWA
Vishay Electro-Films
Thin Film Power Resistors
FEATURES
• Wire bondable
Product may not
• 500 mW power
be to scale
• Chip size: 0.030 x 0.045 inches
• Resistance range 0.3 Ω to 1 MΩ
• Oxidized silicon substrate for good power dissipation
• Resistor material: Tantalum nitride, self-passivating
The PWA series resistor chips offer a 500 mW power rating
in a small size. These offer one of the best combinations of
size and power available.
APPLICATIONS
The PWAs are manufactured using Vishay Electro-Films
(EFI) sophisticated thin film equipment and manufacturing
technology. The PWAs are 100 % electrically tested and
visually inspected to MIL-STD-883.
The PWA resistor chips are used mainly in higher power
circuits of amplifiers where increased power loads require a
more specialized resistor.
TEMPERATURE COEFFICIENT OF RESISTANCE, VALUES AND TOLERANCES
Tightest Standard Tolerance Available
ꢀ %
1 %
0.ꢀ %
0.1 %
PROCESS CODE
CLASS H*
002
CLASS K*
006
2ꢀ ꢁꢁmꢂ/C
ꢀ0 ꢁꢁmꢂ/C
001
005
100 ꢁꢁmꢂ/C
000
008
1ꢀ0 ꢁꢁmꢂ/C
009
010
*MIL-PRF-38534 inspection criteria
0.3 Ω 2 Ω
ꢀ Ω
2ꢀ Ω
100 Ω
200 kΩ ꢀ00 kΩ
300 kΩ 1 MΩ
*600, - 100 ꢁꢁm R < 2 Ω, 2ꢀ0 ꢁꢁm ꢃor 2 Ω to ꢀ Ω
STANDARD ELECTRICAL SPECIFICATIONS
PARAMETER
Noise, MIL-STD-202, Method 308
100 Ω - 2ꢀ0 kΩ
< 100 Ω or > 2ꢀ1 kΩ
- 35 dB typ.
- 20 dB typ.
Moisture Resistance, MIL-STD-202
Method 106
0.5 % max. ΔR/R
Stability, 1000 h, + 12ꢀ /C, 2ꢀ0 mW
0.5 % max. ΔR/R
Oꢁerating Temꢁerature Range
- 55 °C to + 125 °C
Thermal Shock, MIL-STD-202,
Method 107, Test Condition F
0.1 % max. ΔR/R
High Temꢁerature Exꢁosure, + 1ꢀ0 /C, 100 h
Dielectric Voltage Breakdown
Insulation Resistance
0.2 % max. ΔR/R
200 V
1012 min.
Oꢁerating Voltage
Steady State
ꢀ x Rated Power
100 V max.
200 V max.
DC Power Rating at + 70 /C (Derated to Zero at + 17ꢀ /C)
(Conductive Eꢁoxy Die Attach to Alumina Substrate)
500 mW
ꢀ x Rated Power Short-Time Overload, + 2ꢀ /C, ꢀ s
0.1 % max. ΔR/R
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For technical questions, contact: efi@vishay.com
Document Number: 61019
Revision: 12-Mar-08