Transcription of Type SR Precision Current Sense Resistors - Caddock
1 2003-2017 Caddock Electronics, and Applications Engineering17271 North Umpqua , Oregon 97470-9422 Phone: (541) 496-0700 Fax: (541) 496-0408e-mail: web: Caddock Distributors listed by country see , Type SR Precision Current Sense Resistors Non-inductive Design - Compact Footprint Minimizes Circuit Board SpaceKelvin Terminals (Four Wire) - Resistance Values to Type SR Current Sense Resistors utilize Caddock 's Micronox resistance films to achieve a low cost resistor with Non-inductive Performance. This compact construction makes this Sense resistor ideal for many Current monitoring or control applications. The special performance features of these Type SR Current Sense Resistors include: Available in Standard Resistances down to 5 milliohm. Non-Inductive Design. Terminals are constructed for Kelvin connections to the circuit board. Compact Custom resistance values can be manufactured for high quantity applications.
2 Please contact Caddock Applications :Resistance Tolerance: Coefficient: TC referenced to +25 C, R taken at -15 C and +105 to ohm -50 to +100 ppm/ to ohm 0 to +150 ppm/ to ohm 0 to +200 ppm/ to ohm 0 to +300 ppm/ CLoad Life: 1000 hours at rated power at +70 C, R ( percent + ohm) Shock: Mil-Std-202, Method 107, Cond. A, R ( percent + ohm) Resistance: Mil-Std-202, Method 106, R ( percent + ohm) : Polymer over resistance Information:DIMENSIONS IN INCHES AND (MILLIMETERS) Measurement note: For purposes of these specifications, resistance measurement shall be made using Kelvin connections (four wire) with appropriate Current and Sense con-nections to the device terminals. C = Current connection S = Sense connection Circuit Board Layout: The circuit board traces connecting to the Current terminals must be sized appropriately for the Current flowing through the trace. For example; operated at Watts would have 20 amps flowing through the circuit board traces into the Current - - 1%Model Number:Resistor Value:ToleranceScale:actual sizeFront viewSide viewBack viewSR10 PACKAGE DIMENSIONSCIRCUIT BOARD LAYOUT.
3 365 .020( .51).370 .015( .38).125 .020( .51).045 ( ).025 (.64).090 ( ) .007(.81 .18) 1%Voltage RatingTerminal WattPower LimitedSolderableModel Rating at 70 C* WattsPower *Power rating:The power rating should be limited as shown by the derating curve based upon the maximum ambient temperature. The derating curve is based on still air with natural convection around the Derating Curve:2515002040100 RATED LOAD, %806070 TEMPERATURE, .007 (.81 .18) .400 .015( .38) 1%.090 MAX.( MAX.).565 .020( .51).125 .020( .51).045 ( ).025 (.64).200 ( ) Section ( ).100 ( ).200 ( ).045 ( ).025 (.64).025 (.64) ( ) Section ( ).100 ( ).100 ( ).045 ( ).025 (.64).025 (.64)AACSSCSR10SR20SR20 PACKAGE SR10 Standard Resistance Values:SR20 Standard Resistance Values.
