60 Series Four Terminal Bare Element Ohmite’s Four Terminal Bare Element Resistors provide ultra low resistance values (to 0.0005Ω) for relatively high current requirements, with the advantages of a Kelvin configuration and PC Board mounting capability. These shunt resistors are specifically designed for low resistance applications requiring the highest accuracy and temperature stability. This Four Terminal version of Ohmite’s 60 Series Resistor is specially designed for use in a Kelvin configuration, in which a current is applied through two opposite terminals and sensing voltage is measured across the other two terminals. The Kelvin configuration enables the resistance and temperature coefficient of the terminals to be effectively eliminated. The four terminal design also results in a lower Temperature Coefficient of Resistance and lower self heating drift which may be experienced on two terminal resistors. The requirement to connect to the terminals at precise test points is eliminated, allowing for tighter tolerancing on the end application. F e at u r e s •Ideal for current sensing applications •1% tolerance standard, others available •Low inductance (non-inductive below 0.05Ω) •RoHS compliant •Radial, self-supporting, design is ideal for PC board mounting •High Power-to-size ratio •Decimal marked, silicone coated (650 Series only) S e r i e s s p e c i f i c at i o n s Series 610 650 Wattage Resistance Range (Ω)* 1W 0.002-0.050 5W 0.002-0.005 *Standard; others available Amps max. 32 100 Tolerance* 1% 1% characteristics Derating Terminals Tinned Copper Resistive element Manganin Alloy 100 Percent Rated Watts Operating Temperature Range -55˚C to +275˚C. Temperature Coefficient of Resistance 0˚C to 85˚C: ±50 PPM/˚C, .015Ω and higher; ±100 PPM/˚C, .015Ω and lower Environmental Performance Exceeds the requirements of MIL-PRF-49465 Power rating Based on 25˚C free air rating Overload 5 times rated wattage for 5 seconds 80 60 40 20 0 Thermal EMF Less than ±3µV/˚C 1.100" ±.010 0.040" (18AWG) 48 RoHS Compliant 60 Series Tolerance Ohm Value F = 1% Example: Wattage D = 0.5% R050= 0.05Ω 10 = 1.0 50 = 5.0 1.400" max. 1.000" ±.010 Terminals P = 4 terminals 610FPR050E 0.200" ±.010 650 Series (5 watt) 0.081" (12AWG) 175 225 275 Stdandard part numbers 0.200" ±.015 0.450" max. 0.100" (typ. to bend) 125 ORDERIN G IN F ORMATION 610 Series (1 watt) 0.100" (typ. to bend) 75 Ambient Temperature, ϒC Derating Linearly from 100% @ +25°C to 0% @ 275°C dimensions 0 25 0.180" (typ. tinned surface) 0.250" ±.010 1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • [email protected] Ohmic value 0.002 0.005 0.010 0.015 0.020 0.025 0.036 0.050 610 Series 650 Series 1 watt 5 watt 610FPR002E 650FPR002E 610FPR005E 650FPR005E 610FPR010E – 610FPR015E – 610FPR020E – 610FPR025E – 610FPR036E – 610FPR050E –