Caddock Current Sense Resistors Visit CaddockOs Website at www.caddock.com Type MK Radial Lead Precision Power Resistor, CK06 Size, 1 Ohm to 100 Meg, 0.75 Watt Rating EACH Stock No. Mfr.Os Type Wattage 125C Max. Voltage Ohms/ Range 1-9 10-24 25-49 524-5XXX MK 132 .75 400 1 - 20 50 100 - 50K 100K - 500K 1M-5M 5.77 3.61 3.00 3.61 4.67 5.25 3.28 2.73 3.28 4.25 4.81 3.01 2.50 3.01 3.89 524-5XXX MK 632 .75 400 10 M 20 M 50 M - 100 M 4.96 5.96 5.96 4.51 5.42 5.42 4.13 4.96 4.96 Comparison of Type MK and ORNO Ratings and Dimensions This table of ORNO style axial-lead resistors shows the many sizes and power ratings that can be replaced with one of the type MK precision film resistors within the maximum allowable voltage ratings. Resistor Type Maximum Resistance .75W 100 Megohms .200 (5.08) RN50 .05W 1 Megohm RN55 .10W 5 Megohms RN60 .125W 10 Megohms RN65 .25W 20 Megohms .400 (10.15) .500 (12.70) .625 (15.90) .875 (22.20) RN70 .50W 40 Megohms MK 132 or MK 632 Standard Tolerance: 1%. Temperature Coefficient: 5 ohm to 5 Meg, 50 ppm/C; <5 ohm 200 ppm/C; >5 Meg, 80 ppm/C; TC referenced to +25C, AER taken at 15C and +105C. Operating Temperature: 55C to +175C, 100% rated power at +125C derated linearly to zero at +175C. Leadwire: Tinned copper. Ohms XX Ohms XX Ohms XX Ohms XX Ohms XX Ohms XX 1 5 20 50 020 050 098 158 100 200 500 1K 202 243 306 356 2K 10K 20K 50K 400 522 575 655 100K 200K 500K 1M 717 759 627 877 2M 5M 10M 20M 905 906 924 935 50M 100M N N 950 975 N N Mounting Hole Spacing Power Rating 1.000 (25.40) Type SR Precision Current Sense Resistors, Kelvin Terminals, 0.008 1/2 to 1.00 1/2, 1.0 and 2.0 Watt Versions 11 Standard Tolerance: 1%. Temperature Coefficient. TC taken at 15C and 105C; 0.081 ohms and above, 50 to +100 ppm/C; below 0.081 ohms down to 0.025 ohm, 0 to +150 ppm/C; below 0.025 ohm down to 0.008 ohm, 0 to +200 ppm/C. Load Life: 1000 hours at rated power at 70C AER 0.2% max. *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 resistor. Measurement Note: For purposes of these specifications, resistance measurement shall be made using Kelvin connections (four wire) with appropriate current and sense connections to the device terminals. Circuit Board Layout: The circuit board traces connecting to the current terminals must be sized appropriately for the current flowing through the trace to avoid excessive heating of the trace. For example; 0.008 1/2 operated at 1.0 watts would have 11.2 amps flowing through the circuit board traces into the current terminals. Stock No. Mfr.Os Type Power Rating Max. Voltage Ohms 524-4120 524-4122 524-4124 524-4126 524-4128 524-4130 524-4132 524-4134 524-4136 524-4138 524-4140 524-4142 524-4144 524-4146 524-4148 524-4150 524-4152 SR10 1% 0.008 SR10 1% 0.010 SR10 1% 0.015 SR10 1% 0.020 SR10 1% 0.025 SR10 1% 0.030 SR10 1% 0.033 SR10 1% 0.040 SR10 1% 0.050 SR10 1% 0.075 SR10 1% 0.10 SR10 1% 0.20 SR10 1% 0.25 SR10 1% 0.40 SR10 1% 0.50 SR10 1% 0.75 SR10 1% 1.00 1.0 Watt* 1.0 Watt* 1.0 Watt* 1.0 Watt* 1.0 Watt* 1.0 Watt* 1.0 Watt* 1.0 Watt* 1.0 Watt* 1.0 Watt* 1.0 Watt* 1.0 Watt* 1.0 Watt* 1.0 Watt* 1.0 Watt* 1.0 Watt* 1.0 Watt* Power Ltd. Power Ltd. Power Ltd. Power Ltd. Power Ltd. Power Ltd. Power Ltd. Power Ltd. Power Ltd. Power Ltd. Power Ltd. Power Ltd. Power Ltd. Power Ltd. Power Ltd. Power Ltd. Power Ltd. 0.008 0.010 0.015 0.020 0.025 0.030 0.033 0.040 0.050 0.075 0.100 0.200 0.250 0.400 0.500 0.750 1.000 654 b ALLIED EACH 1-9 10-24 25-49 Stock No. Mfr.Os Type Power Rating Max. Voltage Ohms 3.20 3.20 3.20 2.77 2.77 2.77 2.77 2.77 2.77 2.77 2.77 2.77 2.77 2.77 2.77 2.77 2.77 2.91 2.91 2.91 2.52 2.52 2.52 2.52 2.52 2.52 2.52 2.52 2.52 2.52 2.52 2.52 2.52 2.52 2.67 2.67 2.67 2.31 2.31 2.31 2.31 2.31 2.31 2.31 2.31 2.31 2.31 2.31 2.31 2.31 2.31 524-4160 524-4162 524-4164 524-4166 524-4168 524-4170 524-4172 524-4174 524-4176 524-4180 524-4182 524-4184 524-4186 524-4188 524-4190 524-4192 N SR20 1% 0.008 SR20 1% 0.010 SR20 1% 0.015 SR20 1% 0.020 SR20 1% 0.025 SR20 1% 0.030 SR20 1% 0.033 SR20 1% 0.040 SR20 1% 0.050 SR20 1% 0.10 SR20 1% 0.20 SR20 1% 0.25 SR20 1% 0.40 SR20 1% 0.50 SR20 1% 0.75 SR20 1% 1.00 N 2.0 Watts* 2.0 Watts* 2.0 Watts* 2.0 Watts* 2.0 Watts* 2.0 Watts* 2.0 Watts* 2.0 Watts* 2.0 Watts* 2.0 Watts* 2.0 Watts* 2.0 Watts* 2.0 Watts* 2.0 Watts* 2.0 Watts* 2.0 Watts* N Power Ltd. Power Ltd. Power Ltd. Power Ltd. Power Ltd. Power Ltd. Power Ltd. Power Ltd. Power Ltd. Power Ltd. Power Ltd. Power Ltd. Power Ltd. Power Ltd. Power Ltd. Power Ltd. N 0.008 0.010 0.015 0.020 0.025 0.030 0.033 0.040 0.050 0.100 0.200 0.250 0.400 0.500 0.750 1.000 N EACH 1-9 10-24 25-49 4.79 4.79 4.79 4.16 4.16 4.16 4.16 4.16 4.16 4.16 4.16 4.16 4.16 4.16 4.16 4.16 4.16 4.36 4.36 4.36 3.78 3.78 3.78 3.78 3.78 3.78 3.78 3.78 3.78 3.78 3.78 3.78 3.78 3.78 4.00 4.00 4.00 3.47 3.47 3.47 3.47 3.47 3.47 3.47 3.47 3.47 3.47 3.47 3.47 3.47 3.47 See Our Manufacturer Index Located In Section 1