RTOP
Vishay Sfernice
Power Resistors for Mounting onto a Heatsink
Thick Film Technology
FEATURES
鈥?1% tolerance available
鈥?High power rating
鈥?Wide ohmic value range
鈥?Non inductive
鈥?Easy mounting
鈥?Low thermal radiation of the case
鈥?Standard Isotop case (SOT 227 B)
This series of thick 铿乴m power resistors include modules which can incorporate up to 2 different resistor values in the same SOT
227B package. Two types of terminations are available along with a 4 terminal device for measurement applications in the case
of the single resistor version. This product range bene铿乼s from Vishay Sfernice鈥檚 experience in thick 铿乴m power resistor technol-
ogy i.e high power: volume ratio, low tolerance or individual resistors and excellent overload capabilities (due to the trimming
technique).
DIMENSIONS
in millimeters
RTOP
V Connections
鈥?Tolerances unless otherwise speci铿乪d: 卤 0.3mm
MECHANICAL SPECIFICATIONS
Mechanical Protection
Substrate
Resistive Element
End Connection
Tightening Torque Connections
Tightening Torque Heatsink
Insulated case
Alumina on insulated base
Cermet
V connections: screw M4 x 6
1 Nm
2 Nm
ELECTRICAL SPECIFICATIONS
Resistance Range
Standard Tolerance
Power Rating
Temperature Coef铿乧ient
Standard
卤 300 ppm/藲C (R < 1)
卤 150 ppm/藲C (R > 1)
> 10
6
M鈩?/div>
0.046 to 1M鈩?/div>
卤 1% to 卤 10%
50W to 200W at + 25掳C
ENVIRONMENTAL SPECIFICATIONS
Temperature Range
Climatic Category
- 55掳C to + 125掳C
55/125/56
Insulation Resistance
Document Number: 50045
Revision 14-Jan-04
For technical questions, contact sfer@vishay.com
www.vishay.com
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