Ohmite’s TDH resistor is an economical solution to intermediate power application design requirements. TDH’s reliable thick film on alumina substrate construction can be easily heat sinked for higher power performance. TDH resistors are ideal for pulse-loading, pre-charge, bleeder, and snubber applications.
Features
- 35 Watt power rating at 25°C
- SMD - D2PAK package configuration
- Heat resistance to cooling plate: Rth <4.28°C/W
- A molded case for environmental protection./li>
- Resistor element is electrically insulated from the metal sink tab.
Characteristics
Derating
Derating (thermal resistance): 0.23W/°C (4.28°C/W). The
case temperature is to be used for purposes of establishing
the applied power limit. The case temperature measurement
must be made with a thermocouple contacting the center of
the component mounted on the designed heat sink. Thermal
grease should be applied propperly.
Dimensions
Tape Dimensions
750 pc./reel
Ordering Information
Standard Part Numbers
THIS PRODUCT IS DESIGNED FOR USE WITH PROPER HEATSINKING.
Maximum base plate temperature of the resistor must be monitored and kept within specified limits to establish the power rating. Best technique is to attach a thermocouple to the side of the base plate of the resistor. Temperature of plastic housing or heat sink cannot be used to establish rating of the resistor.