Saturday, July 15, 2006
Power resistors aren't troubled by overloads
A new series of power wirewound resistors with high temperature ceramic shells is available with power ratings up to 60W.
Providing design engineers with a high power flameproof resistive device capable of handling overload conditions, TT electronics IRC Wire and Film Technologies Division has developed a series of power wirewound resistors with high temperature ceramic shells, in power ratings up to 60W. Designated the PW and PWR Series, the resistors are available in both axial and radial lead configurations. According to Keith Chipman, Product Manager at IRC's Wire and Film Technologies Division, the PW and PWR Series resistors are specifically designed for power applications and are excellent at handling overloads.
'The resistors feature high-temperature ceramic shells with inorganic fill materials to create a flameproof construction', said Chipman.
'Additionally, the PW Series can be ordered with TCRs as high as +5500ppm/C, making them ideal to protect circuits from thermal runaway or circuits that require temperature compensation'.
Applications for the PW and PWR Series devices include power electronics circuits as inrush, pulse or protection resistors; voltage dividers, bleeders, current limiters, and load banks.
They are specified in power supplies, motor controllers, white goods and automotive applications.
The PW Series resistors, with power ratings from 2 to 25W in axial lead configurations and 20 to 60W in radial terminal configurations, are available in resistance values ranging from 0.10ohm to 30kohm at standard tolerances of +/-10% or +/-5%.
TCRs range from +300 to +5500ppm/C.
The PWR Series resistors are radial leaded (vertical) devices with power ratings from 3 to 10W, and resistance values ranging from 0.10ohm to 18kohm, with standard tolerances of +/-10 or +/-5%.
The PW/PWR Series resistors are constructed using alloy resistance wire wound on glass-fibre substrates, packaged in high temperature ceramic shells with fireproof inorganic encapsulate material.
PC board standoffs are optional on the PW Series devices.
IRC will also produce devices outside these specifications to meet customer requirements.
Typical pricing for the PW Series resistors ranges from $0.15 to $0.20 in quantities of 10,000.
Providing design engineers with a high power flameproof resistive device capable of handling overload conditions, TT electronics IRC Wire and Film Technologies Division has developed a series of power wirewound resistors with high temperature ceramic shells, in power ratings up to 60W. Designated the PW and PWR Series, the resistors are available in both axial and radial lead configurations. According to Keith Chipman, Product Manager at IRC's Wire and Film Technologies Division, the PW and PWR Series resistors are specifically designed for power applications and are excellent at handling overloads.
'The resistors feature high-temperature ceramic shells with inorganic fill materials to create a flameproof construction', said Chipman.
'Additionally, the PW Series can be ordered with TCRs as high as +5500ppm/C, making them ideal to protect circuits from thermal runaway or circuits that require temperature compensation'.
Applications for the PW and PWR Series devices include power electronics circuits as inrush, pulse or protection resistors; voltage dividers, bleeders, current limiters, and load banks.
They are specified in power supplies, motor controllers, white goods and automotive applications.
The PW Series resistors, with power ratings from 2 to 25W in axial lead configurations and 20 to 60W in radial terminal configurations, are available in resistance values ranging from 0.10ohm to 30kohm at standard tolerances of +/-10% or +/-5%.
TCRs range from +300 to +5500ppm/C.
The PWR Series resistors are radial leaded (vertical) devices with power ratings from 3 to 10W, and resistance values ranging from 0.10ohm to 18kohm, with standard tolerances of +/-10 or +/-5%.
The PW/PWR Series resistors are constructed using alloy resistance wire wound on glass-fibre substrates, packaged in high temperature ceramic shells with fireproof inorganic encapsulate material.
PC board standoffs are optional on the PW Series devices.
IRC will also produce devices outside these specifications to meet customer requirements.
Typical pricing for the PW Series resistors ranges from $0.15 to $0.20 in quantities of 10,000.
# posted by Swathi @ 3:12 AM 
