Maximum Resistor Power Calculator
The below calculator is designed to calculate the maximum power that a resistor can dissipate based on a given heat sink size and ambient conditions. This calculator assumes 1°C/W for the thermal resistance of the resistor body to the heat sink case.
Enter values below and the result will automatically be calculated.
The table below offers a selection of our power resistors and their specifications, all of which are heat sink mountable:
|Series||Thermal Resistace||Resistance Range||Tolerance||TCR||Power Rating||Packaging|
|Caddock MP915||8.33°C/W||0.02Ω to 1kΩ||±1.0% (from 0.05Ω)||-20 to +80 ppm/°C (from 0.5Ω)||15W||TO-126 style|
|Caddock MP916||7.81°C/W||0.01Ω to 0.019Ω||±5.0%||0 to +500 ppm/°C||16W||TO-126 style|
|Caddock MP925||5.00°C/W||5kΩ to 100kΩ||±1.0%||-20 to +80 ppm/°C||25W||TO-220 style|
|Caddock MP930||4.17°C/W||0.02Ω to 4.99kΩ||±1.0% (from 0.05Ω)||-20 to +80 ppm/°C (from 0.5Ω)||30W||TO-220 style|
|Caddock MP9100||1.50°C/W||0.05Ω to 100Ω||±1.0%||-20 to +80 ppm/°C (from 0.5Ω)||100W||TO-247 style|
|Isabellenhütte PBH||4°C/W||0.002Ω to 100Ω||±0.5% (from 0.01Ω)||<50 ppm/°C||10W||TO-247 style|
|Isabellenhütte PBV||3°C/W||0.0005Ω to 1Ω||±0.5% (from 0.0015Ω)||<30 ppm/°C (from 0.01Ω)||10W||Non-standard|
|Isabellenhütte A-H2||3°C/W||0.001Ω to 100Ω||±0.1% (from 0.001Ω)||<30 ppm/°C||10W||Non-standard|