Current-Sensing Resistors minimize thermal expansion.
Press Release Summary:
Surface-mount Series LR72 A/B/C resistors, with open-center shapes, offer tolerance of +/-5%, inductance value under 10nH, and resistance ratings as low as 0.002 ohms. Types A and B have TCR of +/-100 ppm/deg C and power ratings of 1/2 W @25 deg C and 1/4 W @25 deg C, respectively. Type C has TCR of +/-350 ppm/deg C and power ratings of 1 W @70 deg C and 2 W @25 deg C. Flameproof resistors have 60/40 plate pads suitable for flow and reflow soldering.Original Press Release:
Current Sensing Resistors Offer Minimal Thermal Expansion Cycling
Bradford, PA - February 1, 2002 - KOA Speer Electronics introduces its new line of current sensing surface mount resistors designed for lesser thermal expansion/contraction, allowing for fewer mismatches and/or separations between the part and the PCB. The unique open-center shapes of the LR72A/B/C series provide cooler operation as the flexible leads also allow for thermal expansion and aid in alleviating stress to the component. KOA Speer current sensing resistors minimize current interference.
The LR72 A/B/C series resistors offer a standard tolerance of ±5%, an inductance value of under 10nH and standard resistance ratings as low as 0.002 ohms. Types A& B feature a TCR of ±100ppm/°C and power ratings of 1/2W @25°C and 1/4 W @25°C respectively. Type C features a TCR of ±350ppm/°C and power ratings of 1W @70°C and 2W @25°C. KOA Speer LR72 A/B/C series resistors are flameproof and designed with 60/40 plate pads suitable for flow and reflow soldering.
KOA Speer LR72 A/B/C series resistors may be used in current sensing, low inductance, feedback, surge and pulse, and AC applications (consult KOA Speer factory regarding AC use).
KOA Speer Electronics is a QS 9000, ISO 9002 certified company that has been serving the electronics industry since 1980. An affiliate of KOA Corporation of Japan, KOA Speer is a leading supplier of surface rrouit aniid hru-hlole resistors, tantalum chip capacitors, inductors, resistor networks, integrated passive components, and ferrite beads. These products are distributed primarily to the North American market for applications including automotive, telecommunications, computer and instrumentation.
