RK73B*RK73H*RK73Z-RT EU RoHS Flat Chip Resistors (Anti Sulfuration) Construction L c c W t RK73Z RK73H d RK73B Reference Standards IEC 60115-8 JIS C 5201-8 EIAJ RC-2134C Ni plating Solder plating Ceramic substrate Dimensions mm Weight (g) (1000pcs) W c d t 0.20.02 0.10.03 0.110.03 0.130.02 0.04 0.30.03 0.10.05 0.150.05 0.230.03 0.14 0.50.05 0.20.1 0.25 +0.05 0.350.05 0.68 -0.1 0.80.1 0.30.1 0.30.1 0.450.1 2.14 1.250.1 0.40.2 0.3 +0.2 0.50.1 4.54 -0.1 9.14 1.60.2 +0.2 0.4 -0.1 2.60.2 15.5 0.60.1 2.50.2 24.3 0.50.3 0.650.15 3.10.2 37.1 L 0.40.02 0.60.03 1.0 +0.1 -0.05 1.60.2 2.00.2 3.20.2 5.00.2 6.30.2 1 RK73Z 1 Exemption RK73Z Applications z z Car electronics, Power supply, Industrial robot Derating Curve RK73B * RK73H * RK73Z-RT Ambient temperature RK73B * RK73H * RK73Z-RT Terminal part temperature 100 80 1F 1H,1E,1J,2A,2B 2E,W2H,W3A(1W) 60 40 20 0 -60 -40 -20 0 20 40 60 80 100 120 140 160 -55 70 155 125 Ambient temperaturep!C 70 (RK73B,RK73H) (RK73Z) For resistors operated at an ambient temperature of 70 or above, a power rating (for RK73B, RK73H) or a current rating (for RK73Z) shall be derated in accordance with the above derating curve. RK73BRK73H-RT Terminal part temperature W3A2 100 100 80 Percent rated power Features z z z z z RoHS RoHS z AEC-Q2001F z Excellent anti-sulfuration characteristic due tousing high sulfuration-proof inner top electrodematerial. z Excellent heat resistance and weather resistanceare ensured by the use of metal glaze thick film. z High stability and high reliability with the triple-layer structure of electrode. z Suitable for both flow and reflow solderings. z Products with lead free termination meet EU-RoHS requirements. EU-RoHS regulation is not intended for Pbglass contained in electrode, resistor element and glass. z AEC-Q200 qualified (Exemption 1F). Type (Inch Size Code) 1F01005 1H0201 1E0402 1J0603 2A0805 2B1206 2E1210 W2H2010 W3A2512 1 W3A22512 Percent rated power for RK73B, RK73H RK73Z Percent rated current for RK73Z Dimensions RK73B, RK73H Coating color BlackRK73B 1F, 1H, 1E, 1J, 2A, 2B, 2E, W2H, W3A, W3A2 RK73H 1F, 1HRK73Z 1J, 2A, 2B, 2E, W2H, W3A Blue RK73H 1E, 1J, 2A, 2B, 2E, W2H, W3A GreenRK73Z 1H, 1E Protective coating Resistive film Inner electrode RK73B, RK73H Percent rated power for RK73B, RK73H RK73Z Percent rated power for RK73Z Flat Chip Resistors THICK FILM (ANTI SULFURATION) 1H,1E,1J,2A,2B,2E, W2H,W3A(1W) 60 40 20 0 -60 -40 -20 -55 0 20 40 60 80 100 120 140 125 160 155 Terminal part temperature 80 60 40 20 0 -60 -40 -20 0 -55 20 40 60 80 100 120 140 160 95 Terminal part temperature 155 "" For resistors operated terminal part temperature of described for each size or above, a power rating shall be derated in accordance with derating curve. Please refer to"Introduction of the derating curves based on the terminal part temperature"on the beginning of our catalog before use. Type Designation Example RK73H 2A RT TD 1002 F RK73Z 2A RT TD Product Code Power Rating Terminal Surface Material Taping Nominal Resistance Resistance Tolerance Product Code Current Rating Terminal Surface Material Taping RK73B RK73H 1F : 0.03W 1H : 0.05W 1E : 0.1W 1J : 0.1W 0.125W 2A : 0.25W 2B : 0.25W 2E : 0.5W W2H : 0.75W W3A : 1W W3A2 : 2W RT: Sn D : 0.5% F : 1% G : 2% J : 5% RK73Z 1H : 0.5A 1E : 1A 1J : 1A 2A : 2A 2B : 2A 2E : 2A W2H : 2A W3A : 2A RT: Sn TX:4mm width-1mm pitch RK73B : 3 digits plastic embossed RK73H: 4 digits TBL * TC * TCM:2mm pitch press paper TPLTP:2mm pitch punch paper TD: 4mm pitch punch paper TE: 4mm pitch plastic embossed BK:Bulk TC * TCM:2mm pitch press paper TPL * TP:2mm pitch punch paper TD:4mm pitch punch paper TE:4mm pitch plastic embossed BK:Bulk EU-RoHS C. Contact us when you have control request for environmental hazardous material other than the substance specified by EU-RoHS. For further information on taping, please refer to APPENDIX C on the back pages. Specifications given herein may be changed at any time without prior notice. Please confirm technical specifications before you order and/or use. Contact our sales representatives before you use our products for applications including automotives, medical equipment and aerospace equipment. Malfunction or failure of the products in such applications may cause loss of human life or serious damage. Nov. 2018 www.koaglobal.com RK73B, RK73H Type 1F 1H 1E 1J 2A 2B 2E W2H W3A W3A2 / Resistance Range Packaging & Q'ty/Reelpcs Max. Rated Max. Rated RK73H RK73B Power T.C.R. Ambient Terminal Working Overload x10-6/K D0.5 F1 G2 J5 Rating TX TBL TCTCM TPLTP TD Temp. Part Temp. Voltage Voltage E24E96 E24E96 E24 E24 200 100k2M 100k1M 100k10M 250 20V 30V 40,000 20,000 0.03W 70 1091k 1091k 1091k 0300 19.1 19.1 200 100100k 1001M 1001M TC 10,000 TCM15,000 0.05W 70 125 25V 50V 300 1091 1097.6 100 1001M 101M TPL20,000 0.1W 70 125 TP 10,000 200 1.02M10M 1010M 110M 100 1.02k1M 1.02k1M 75V 100V 0.1W 200 1.02M10M 1.1k10M 1.1k10M 70 125 TP 10,000 5,000 100 1001k 101k 0.125W 200 101k 11k 100 1001M 101M 0.25W 70 125 150V 200V TP 10,000 5,000 200 1.02M10M 1010M 110M 100 1001M 101M 0.25W 70 125 5,000 200 1.02M10M 1010M 110M 100 1001M 101M 0.5W 70 125 5,000 200 101M 110M 200V 400V 100 101M 101M 0.75W 70 125 19.76 200 110M 1.02M10M 110M 100 101M 101M 1W 70 125 200 1.02M10M 1010M 110M 100 101M 101M 2W 95 200V 400V 200 1.02M10M 1010M 110M TE 4,000 4,000 4,000 4,000 4,000 4,000 Operating Temperature Range-551251F-551551H*1E*1J*2A*2B*2E*W2H*W3A*W3A2 RK73H1FF1%E24 The nominal resistance value for RK73H1F (F:1%) is E24. x Rated voltage = Power RatingxResistance value or Max. working voltage, whichever is lower. 1417"" If any questions arise whether to use the"Rated Ambient Temperature"or the"Rated Terminal Part Temperature"in your usage conditions, please give priority to the"Rated Terminal Part Temperature". For more details, please refer to"Introduction of the derating curves based on the terminal part temperature"in page 14 to 17. While using under high power, the temperature of the product may increase depending on the condition of heat dissipation from PCB. Be sure to check the terminal part temperature as well as precausions to use on delivery specifications before use. RK73Z Type Rated Ambient Temperature Rated Terminal Part Temp. Resistance Current Rating Max. Overload Current 70 125 100m 100mmax. 0.5A 1A 70 125 50m 50mmax. 1A 2A 1H 1E 1J 2A 2B 2E W2H W3A 5A 70 125 50m 50mmax. 2A Operating Temp. Range -55155 10A / Packaging & Q'ty/Reelpcs TC * TCM TPL * TP TD TC 10,000 TCM15,000 TPL20,000 TP 10,000 TP 10,000 TP 10,000 5,000 5,000 5,000 5,000 TE 4,000 4,000 4,000 4,000 4,000 Performance RK73H, RK73B Performance Requirements R0.1 Limit Typical Within specified tolerance RK73Z Performance Requirements Limit Typical R100m1H R90m1H R50manother R40manother Within specified T.C.R. +25/-55 and +25/+125 OverloadShort time 2 11F 0.8another R100m1H R50manother R90m1H R40manother Resistance to soldering heat Rapid change of temperature 110R1M 3R10, R1M 11F 0.5another R100m1H R50manother R100m1H R50manother R90m1H R40manother R90m1H R40manother Moisture resistance 21J, 2A, 2B 3another R150m1H R100manother R100m1H R50manother 402, 90%95%RH, 1000h 1.5ON0.5OFF 1.5h ON/0.5h OFF cycle 70 Endurance at 70 High temperature exposure 21J, 2A, 2B 3another 1R10, R1M 0.5another 0.51F 0.3another 0.751J, 2A, 2B 1.51F 1another 0.751J, 2A, 2B 1another RK73B,RK73H : x2.551E, 2B, W3A2x2 RK73B,RK73H : Rated voltage x2.5 for 5s1E, 2B, W3A2Rated voltagex2 for 5s RK73Z : 5 Max. overload current, 5s 1 0.5 R150m1H R100manother R150m1H R100manother R100m1H R50manother R100m1H R50manother Sulfuration test 5 0.31F, 1H 0.2another R150m1H R100manother R100m1H R50manother 702, 1000h 1.5ON0.5OFF 1.5h ON/0.5h OFF cycle 125, 1000h1F 155, 1000h1H, 1E, 1J, 2A, 2B, 2E, W2H, W3A, W3A2 3.5%1053 500h Soaked in industrial oil with sulfur substance 3.5% contained 105 3 500h Test Items Resistance T.C.R. Test Methods 25 2605, 10s1s -55 (30min.) /+125 (30min.) 100 cycles Precautions for Use z W2H/W3A/W3A2 ON/OFFFR-4 1F2EW2H/W3A/W3A2 ON/OFF z RK73B1FRK73H1F z The substrate of chip resistors is alumina. Cracks may occur at the connection of solder (solder fillet portion) due to the difference of the coefficient of thermal expansion from amounting board when heat stress like heat cycle, etc. are repeatedly given to them. Care should be taken to the occurrence of the cracks when the change in ambient temperature or ON/OFF of load is repeated, especially when large types of W2H/W3A/W3A2 which have large thermal expansion and also self heating. By general temperature cycle test using glass-epoxy (FR-4) boards under the maximum/minimum temperatures of operating temperature range, the crack does not occur easily in the types of 1F2E, but the crack tends to occur in the types ofW2H/W3A/W3A2. The occurrence of the crack by heat stress may be influenced by the size of a pad, solder volume, heat radiation of mounting board etc., so please pay careful attention todesigning when a big change in ambient temperature and conditions for use like ON/OFF of load can be assumed. z Care should be taken that RK73B1F and RK73H1F may be damaged when static electricity occurs and is applied in the equipment assembly process. Specifications given herein may be changed at any time without prior notice. Please confirm technical specifications before you order and/or use. Contact our sales representatives before you use our products for applications including automotives, medical equipment and aerospace equipment. Malfunction or failure of the products in such applications may cause loss of human life or serious damage. Nov. 2018 www.koaglobal.com Flat Chip Resistors Ratings