Current Sensing Resistors, Metal Plate Type Current Sensing Resistors, Metal Plate Type Type: ERJM1W Features Low resistance values and high precision (1 m to 20 m) Stable resistance not in uenced by measurement position High heat emission Low pro le, strong body Inductance less than 1.0 nH for the metal plate structure RoHS compliant As for Packaging Methods, Soldering Conditions and Safety Precautions, Please see Data Files Explanation of Part Numbers 1 2 3 4 5 6 7 8 9 10 11 12 E R J M 1 W S F 3 M 0 U Size, Power Rating Type Resistance Tolerance Packaging Methods Product Code Code Thick Film Packaging Code Inch Power R. S General type Code Tolerance Code Chip Resistors Embossed Carrier Taping M1W 2512 1 W T Wide terminal type F 1 % U 4 mm pitch, 3,000 pcs. J 5 % Resistance Value Shown by 3 digits or letters. Decimal point is expressed by M as 3 m=3M0, 10 m=10M Ratings Category Part No. Power Rating Standard Resistance T.C.R. -6 Temperature Circuit board of use (inch size) at 70 C (W) Resistance (m) Tolerance (%) (10 /C) Range (C) 3, 4 350 ERJM1WS You should use the (2512) 5, 6, 10, 15, 20 100 aluminum substrate 1 F: 1, J: 5 55 to +170 when the added 1, 1.5 350100 ERJM1WT watt age exceeds 0.5 W. (2512) 2, 3, 4 10050 Please contact the factory for other values and the range Power Derating Curve 120 For resistors operated in ambient temperatures above 100 70 C, power rating shall be derated in accordance 70 C with the figure on the right. 80 60 40 20 155 C 170 C 0 55 40 0 40 80 120 160 200 Ambient Temperature (C) Design and specifications are each subject to change without notice. Ask factory for the current technical specifications before purchase and/or use. Should a safety concern arise regarding this product, please be sure to contact us immediately. 08 Oct. 2014 Rated Load (%)Current Sensing Resistors, Metal Plate Type Construction Dimensions in mm (not to scale) a L Terminal Plated Metal Resistive Body Alloy Plate Dimensions (mm) Part No. Protective coating Resin Type Mass (Weight) (inch size) LWT a g/1000 pcs. ERJM1WS 0.25 0.25 S Type 6.40 1.00 70 (2512) 0.25 0.30 3.20 0.80 ERJM1WT 0.40 0.30 T Type 6.40 2.10 90 (2512) Recommended Land Pattern An example of a land pattern a Wiring pattern (copper trace) Land pattern Dimensions (mm) Part No. Solder resist ab c ERJM1WS 2.1 3.4 4.2 c ERJM1WT 3.1 3.4 2.2 Design and specifications are each subject to change without notice. Ask factory for the current technical specifications before purchase and/or use. Should a safety concern arise regarding this product, please be sure to contact us immediately. 08 Oct. 2014 b T W