SFN
Vishay Electro-Films
NiCr Thin Film, Top-Contact Resistor
FEATURES
• Wire bondable
• Chip size: 20 inches square
• Resistance range: 10 Ω to 510 kΩ
• Resistor material: Nichrome
• Oxidized silicon substrate
• 250 mW power
Product may not
be to scale
The SFN series resistor chips offer a combination of
nichrome stability, good power rating and small size.
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*
209
208
10 ppmꢁ/C
2ꢀ ppmꢁ/C
ꢀ0 ppmꢁ/C
100 ppmꢁ/C
200
201
202
203
204
205
*MIL-PRF-38534 inspection criteria
ꢀ10 kΩ
20 Ω
ꢀ0 Ω 100 Ω
1 kΩ
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.
Stability, 1000 h, + 12ꢀ /C, ꢀ0 mW
0.25 % max. ΔR/R
- 55 °C to + 125 °C
0.25 % max. ΔR/R
0.5 % max. ΔR/R
200 V
Operating Temperature Range
Thermal Shock, MIL-STD-202, Method 107, Test Condition F
High Temperature Exposure, + 1ꢀ0 /C, 100 h
Dielectric Voltage Breakdown
Insulation Resistance
1012 min.
Operating Voltage
100 V max.
DC Power Rating at + 70 /C (Derated to Zero at + 17ꢀ /C)
ꢀ x Rated Power Short-Time Overload, + 2ꢀ /C, ꢀ s
250 mW
0.25 % max. ΔR/R
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For technical questions, contact: efi@vishay.com
Document Number: 61025
Revision: 12-Mar-08