SFM
Vishay Electro-Films
Thin Film Top-Contact Resistor
FEATURES
• Wire bondable
Product may not
be to scale
• Small size: 0.020 inches square
• Resistance range: 1.0 Ω to 1 MΩ
• DC power rating: 250 mW
• Oxidized silicon substrate for good power dissipation
• Resistor material tantalum nitride, self passivating
• Moisture resistant
The SFM series single-value resistor chips offer a small size,
wide ohmic value range and excellent power capacity.
The SFMs tantalum nitride resistor material offers excellent
resistance to high moisture environments.
The SFMs are manufactured using Vishay Electro-Films
(EFI) sophisticated thin film equipment and manufacturing
technology. The SFMs are 100 % electrically tested and
visually inspected to MIL-STD-883.
APPLICATIONS
Vishay EFI SFM top-contact resistor chips are designed to handle substantial power loads in many types of hybrid packages.
They are ideally suited for this purpose because of their small size.
TEMPERATURE COEFFICIENT OF RESISTANCE, VALUES AND TOLERANCES
Tightest Standard Tolerance Available
0.1 %
PROCESS CODE
1 % 0.ꢀ %
CLASS H*
050
CLASS K*
123
2ꢀ ppmꢁ/C
ꢀ0 ppmꢁ/C
100 ppmꢁ/C
2ꢀ0 ppmꢁ/C
051
122
045
121
040
120
*MIL-PRF-38534 inspection criteria
1 Ω 10 Ω 30 Ω 100 Ω
200 kΩ 360 kΩ
620 kΩ 1 MΩ
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, 12ꢀ 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, + 1ꢀ0 /C, 100 h
Dielectric Voltage Breakdown
0.5 % max. ΔR/R
200 V
Insulation Resistance
1012 min.
Operating Voltage
100 V max.
250 mW
DC Power Rating at + 70 /C (Derated to Zero at + 17ꢀ /C)
ꢀ x Rated Power Short-Time Overload, + 2ꢀ /C, ꢀ s
0.25 % max. ΔR/R
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For technical questions, contact: efi@vishay.com
Document Number: 61017
Revision: 12-Mar-08