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Εταιρικά Νέα :
- Temperature Considerations for DC Relays | TE Connectivity
For a given relay design, these factors can be summed together into a value called the “coil to ambient thermal resistance” of the relay The dimensions of such a value are °C Watt The thermal resistance is analogous to the electrical resistance and the temperature rise created by coil power dissipation follows the equation:
- Themal management of solid state relays
To calculate all the thermal resistances in the circuit (Rjc, Rcs, and Rsa), use Ohm’s law To calculate the thermal resistance of a heat sink: Most SSR manufacturers provide Rcs, Rjc and VDrop It’s important to be aware of the maximum ambient temperature and maximum current to be used
- Temperature its effect on Electro Mechanical Relay Operation
The time taken to reach the final coil temperature is commonly known as the thermal time constant of the coil, whilst the temperature rise per unit of applied coil power is the thermal resistance of the relay
- solid state relay - Why and when do SSRs heat? - Electrical . . .
10 amps of current, squared, times the resistance when on of your SSR = heat What looks to be a poorly designed heatsink (and is there any sort of thermal pad ensuring excellent contact between the SSR and heatsink?) means they get hot, even with "only" 1 4 load
- Basics of Thermal Resistance and Heat Dissipation - Rohm
Thermal resistance is a quantification of how difficult it is for heat to be conducted Thermal resistance is represented as the quotient of the temperature difference between two given points by the heat flow between the two points (amount of heat flow per unit time)
- RELAYS AND TEMPERATURE VARIATIONS - Leach Corp
Most relay parameters are specified as maximum values over the rated temperature range of the specific relay Users often find that key parameters differ significantly at ambient temperature (20-25°C) and sometimes fall into the trap of specifying their system around these ambient parameters
- Understanding Solid-state relays - IDC-Online
Example: What is the required heat sink thermal resistance characteristic for a solid- state relay with a voltage drop of 1 6V and a thermal resistance (junction-to-case) of 1 02°C W, with a load of 20A and ambient temperature of 25°C?
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