SFN
Vishay Electro-Films
CHIP
RESISTORS
NiCr Thin Film, Top-Contact Resistor
FEATURES
• Wire bondable
• Chip size: 20 inches square
Product may not
be to scale
• Resistance range: 10 Ω to 510 kΩ
• Resistor material: Nichrome
• Oxidized silicon substrate
The SFN series resistor chips offer a combination of
nichrome stability, good power rating and small size.
• 250 mW power
The SFNs are manufactured using Vishay Electro-Films
(EFI) sophisticated thin film equipment and manufacturing
technology. The SFNs are 100 % electrically tested and
visually inspected to MIL-STD-883.
APPLICATIONS
Vishay EFI SFN resistor chips are widely used in hybrid packages where space is limited. Designed with capacity to handle
substantial power loads, they also have the benefit of nichrome stability.
Recommended for hermetic environments where die is not exposed to moisture.
TEMPERATURE COEFFICIENT OF RESISTANCE, VALUES AND TOLERANCES
Tightest Standard Tolerance Available
PROCESS CODE
0.1 %
CLASS H*
CLASS K*
± 10 ppm/°C
208
209
± 25 ppm/°C
200
201
± 50 ppm/°C
202
203
± 100 ppm/°C
204
205
*MIL-PRF-38534 inspection criteria
20 Ω
50 Ω
100 Ω
510 kΩ
1 kΩ
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.
Stability, 1000 h, + 125 °C, 50 mW
± 0.25 % max. ΔR/R
Operating Temperature Range
- 55 °C to + 125 °C
Thermal Shock, MIL-STD-202, Method 107, Test Condition F
± 0.25 % max. ΔR/R
High Temperature Exposure, + 150 °C, 100 h
± 0.5 % max. ΔR/R
Dielectric Voltage Breakdown
200 V
1012 min.
Insulation Resistance
Operating Voltage
100 V max.
DC Power Rating at + 70 °C (Derated to Zero at + 175 °C)
5 x Rated Power Short-Time Overload, + 25 °C, 5 s
www.vishay.com
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For technical questions, contact: efi@vishay.com
250 mW
± 0.25 % max. ΔR/R
Document Number: 61025
Revision: 12-Mar-08