Low Resistance Value Chip Resistors Low Resistance Value Chip Resistors(Current Sensing Resistors) 0603, 2512 Type: ERJM03 ERJM1W ■ Features ● ● ● ● ● ● Low resistance values and high precision(1 mΩ to 20 mΩ) Stable resistance not influenced by measurement position High heat emission Low profile, strong body Inductance less than 1.0 nH for the metal plate structure RoHS compliant ■ Packaging Methods, Land Pattern, Soldering Conditions and Safety Precautions Please see Data Files ■ Explanation of Part Numbers ● ERJM03 1 2 3 4 5 6 7 8 9 10 11 12 & 3 + . / ' . 7 Size, Power Rating Type: inch Power R. M03 : 0603 0.25 W Product Code Thick Film Chip Resistors Packaging Methods Packaging Resistance Tolerance Type Code N General type Code F J Tolerance ±1% ±5% Code V Punched Carrier Taping 4 mm pitch, 5,000 pcs. Resistance Value Shown by 3 digits or letters. Decimal point is expressed by M as 10 m?=10M ● ERJM1W 1 2 3 4 5 6 7 8 9 10 11 12 & 3 + . 8 4 ' . 6 Product Code Thick Film Chip Resistors Size, Power Rating Type: inch Power R. M1W : 2512 1W Type Code S General type T Wide terminal type Resistance Tolerance Code F J Tolerance ±1% ±5% Packaging Methods Packaging Embossed Carrier Taping U 4 mm pitch, 3,000 pcs. Code Resistance Value Shown by 3 digits or letters. Decimal point is expressed by M as 3 m?=3M0, 10 m?=10M 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. 01 Aug. 2012 14 Low Resistance Value Chip Resistors ■ Construction ● ERJM03 ● ERJM1W Terminal; Plated Metal Terminal; Plated Metal Resistive Body; Alloy Plate Resistive Body; Alloy Plate Protective coating; Resin Protective coating; Resin ■ Dimensions in mm (not to scale) ● ERJM1W a T T ● ERJM03 a L Type (inch size) ERJM03N (0603) W b W L Dimensions (mm) L W T a b 1.60±0.15 0.8±0.15 0.35±0.10 0.45±0.15 0.65±0.15 Mass (Weight) [g/1000 pcs.] Type 1.7 S Type Dimensions (mm) Type (inch size) ERJM1WS (2512) ERJM1WT T Type (2512) L 6.40 W ±0.25 70 ±0.30 90 1.00 ±0.25 0.80 ±0.40 Mass (Weight) [g/1000 pcs.] a ±0.25 3.20 6.40 T ±0.30 2.10 ■ Ratings Type Power Rating Standard (inch size) at 70 °C (W) Resistance (mΩ) ERJM03N (0603) 0.25 1 ERJM1WT (2512) 10 3, 4 ERJM1WS (2512) Resistance Tolerance (%) 5, 6, 10, 15, 20 T.C.R. (×10 -6/°C) Category Temperature Range (°C) Circuit board of use ±100 –55 to +155 – –55 to +170 You should use the aluminum substrate when the added wattage exceeds 0.5 W. ±350 F: ±1, J: ±5 ±100 1, 1.5 350±100 2, 3, 4 100±50 ✽ Please contact the factory for other values and the range Power Derating Curve For resistors operated in ambient temperatures above 70 °C, power rating shall be derated in accordance with the figure on the right. 120 Rated Load (%) 100 70 °C 80 ERJM1W 60 ERJM03 40 20 0 –55 –40 170 °C 155 °C 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. 01 Aug. 2012 15