Wednesday, September 20, 2006
Power resistors are thermally optimised
Noninductive power resistor is rated up to 20W and housed in a small, thin TO-263 package suitable for high density PCB installation.
Providing design engineers with a thermally efficient high current resistor in a surface mount package, TT Electronics BI Technologies SMT Division has developed a noninductive power resistor rated up to 20W. Designated the SMHP Series, the resistor is housed in a small, thin TO-263 package suitable for high density PCB installation. According to Jim Rieley, Sales Director for BI Technologies' SMT Division, the TO-263 style package offers extremely low thermal resistance.
'The SMHP Series resistors are thermally enhanced and the design of the package allows them to be directly mounted to a heatsink', Rieley said.
'Because the design provides complete thermal flow throughout the device, the resistors are being specified for applications in automotive electronics, switch-mode power supplies, and high frequency snubber and pulse handling circuits'.
The surface mount power resistors are also ideal for high precision CRT colour video amplifiers, pulse generator load resistors, inrush current protection, and bleeder resistors.
The SMHP Series device is an extension of the company's MHP Series through-hole resistors.
The MHP Series noninductive high power resistors are available in five power ratings (20 to 140W) and three TO-style package types, including TO-126, TO-220 and TO-247.
The SMHP Series resistors are rated for 20W power dissipation, with resistance ranges from 0.01 to 220ohm with values to 51kohm available.
TCRs range from 50 to 250ppm/C, with tolerances of +/-5 and +/-1%.
Maximum operating voltage is 500V and dielectric withstanding voltage is 2000V DC.
Thermal resistance is 3.3C/W from the resistor's 'hot spot' to the package's metal flange and operating temperature range is -55 to +155C.
BI Technologies will also produce devices outside these specifications to meet customer requirements, with comprehensive application engineering and design support available for customers worldwide.
Providing design engineers with a thermally efficient high current resistor in a surface mount package, TT Electronics BI Technologies SMT Division has developed a noninductive power resistor rated up to 20W. Designated the SMHP Series, the resistor is housed in a small, thin TO-263 package suitable for high density PCB installation. According to Jim Rieley, Sales Director for BI Technologies' SMT Division, the TO-263 style package offers extremely low thermal resistance.
'The SMHP Series resistors are thermally enhanced and the design of the package allows them to be directly mounted to a heatsink', Rieley said.
'Because the design provides complete thermal flow throughout the device, the resistors are being specified for applications in automotive electronics, switch-mode power supplies, and high frequency snubber and pulse handling circuits'.
The surface mount power resistors are also ideal for high precision CRT colour video amplifiers, pulse generator load resistors, inrush current protection, and bleeder resistors.
The SMHP Series device is an extension of the company's MHP Series through-hole resistors.
The MHP Series noninductive high power resistors are available in five power ratings (20 to 140W) and three TO-style package types, including TO-126, TO-220 and TO-247.
The SMHP Series resistors are rated for 20W power dissipation, with resistance ranges from 0.01 to 220ohm with values to 51kohm available.
TCRs range from 50 to 250ppm/C, with tolerances of +/-5 and +/-1%.
Maximum operating voltage is 500V and dielectric withstanding voltage is 2000V DC.
Thermal resistance is 3.3C/W from the resistor's 'hot spot' to the package's metal flange and operating temperature range is -55 to +155C.
BI Technologies will also produce devices outside these specifications to meet customer requirements, with comprehensive application engineering and design support available for customers worldwide.
# posted by Swathi @ 2:54 AM 
