Approval sheet MR18X, MR20X, MR25X 1%, 5% Power chip resistors Size 1218, 2010, 2512 ( Automotive & Anti-sulfuration ) *Contents in this sheet are subject to change without prior notice. Page 1 of 7 ASC_MR18-20-25X_V03 June.2011 Approval sheet FEATURE 1. High power rating and compact size 2. High reliability and stability 3. Reduced size of final equipment 4. RoHS compliant and Lead free product APPLICATION * Power supply * Industry * Motor control * M/B Computer * Automotives * Servo DESCRIPTION The resistors are constructed in a high grade ceramic body (aluminum oxide). Internal metal electrodes are added at each end and connected by a resistive paste that is applied to the top surface of the substrate. The composition of the paste is adjusted to give the approximate resistance required and the value is trimmed to nominated value within tolerance which controlled by laser trimming of this resistive layer. The resistive layer is covered with a protective coat. Finally, the two external end terminations are added. For ease of soldering the outer layer of these end terminations is a Tin (lead free) alloy. Fig 1. Construction of 2512, 2010 Chip-R Fig 2. Construction of 1218 Chip-R Page 2 of 7 ASC_MR18-20-25X_V03 June.2011 Approval sheet QUICK REFERENCE DATA Item General Specification Series No. MR18 MR20 MR25 Size code 1218(3248) 2010 ( 5025 ), 2512(6432) 5% (E24); 1% (E24+E96) Resistance Tolerance Resistance Range 1 ~ 10M, Jumper (0) < 10 200 ppm/C 200 ppm/C 200 ppm/C 10 ~ 1M 100 ppm/C 100 ppm/C 100 ppm/C > 1M 200 ppm/C 200 ppm/C 200 ppm/C 1W 0.5 W 1W Max. Operation Voltage (DC or RMS) 200V 200V 250V Max. Overload Voltage (DC or RMS) 400V 400V 500V TCR (ppm/C) Max. dissipation at Tamb=70C Climatic category (IEC 60068) 55/155/56 Test conditions for jumper ( 0 ohm ) Type MR18X MR20X MR25X 1W 1/2 W 1W Resistance Max. 50mR Max. 50mR Max. 50mR Rated Current 4.5 A 3.2 A 4.5 A Peak Current 11 A 8A 11 A Power Rating At 70C Operating Temperature -55C ~ 155 Note : 1. This is the maximum voltage that may be continuously supplied to the resistor element, see "IEC publication 60115-8" 2. Max. Operation Voltage : So called RCWV (Rated Continuous Working Voltage) is determined by RCWV = Rated Power x Resistance Value or Max. RCWV listed above, whichever is lower. MECHANICAL DATA (unit : mm) TYPE MR18 MR20 MR25 L 3.050.15 5.000.20 6.400.20 W 4.600.20 2.500.20 3.200.20 T 0.550.10 0.550.10 0.600.10 Tt 0.450.25 0.650.25 0.650.25 Tb 0.500.25 0.600.25 0.900.25 Page 3 of 7 ASC_MR18-20-25X_V03 June.2011 Approval sheet MARKING Each resistor is marked with a four-digit code on the protective coating to designate the nominal resistance value 5%, 1% tolerance ! Size 5% 1% 2512, 2010, 1218 4-digits marking 4-digits marking FUNCTIONAL DESCRIPTION Product characterization Standard values of nominal resistance are taken from the E96 & E24 series for resistors with a tolerance of 5% & 1%. The values of the E24/E96 series are in accordance with "IEC publication 60063". Derating curve The power that the resistor can dissipate depends on the operating temperature; see Fig.3 Fig 3 Maximum dissipation in percentage of rated power as a function of the ambient temperature MOUNTING Due to their rectangular shapes and small tolerances, Surface Mountable Resistors are suitable for handling by automatic placement systems. Chip placement can be on ceramic substrates and printed-circuit boards (PCBs). Electrical connection to the circuit is by individual soldering condition. The end terminations guarantee a reliable contact. SOLDERING CONDITION The robust construction of chip resistors allows them to be completely immersed in a solder bath of 260C for 10 seconds. Therefore, it is possible to mount Surface Mount Resistors on one side of a PCB and other discrete components on the reverse (mixed PCBs). Surface Mount Resistors are tested for solderability at 235C during 2 seconds. The test condition for no leaching is 260C for 30 seconds. Typical examples of soldering processes that provide reliable joints without any damage are given in Fig 4. Fig 4. Infrared soldering profile for Chip Resistors Page 4 of 7 ASC_MR18-20-25X_V03 June.2011 Approval sheet CATALOGUE NUMBERS The resistors have a catalogue number starting with . MR25 X 472_ Size code Type code Resistance code Tolerance Packaging code MR25 : 2512 X : F : 1% T MR20 : 2010 5%: 1-10M 5%: E24: 2 significant digits followed by no. of zeros J : 5% Q : 10" Reeled taping MR18 : 1218 1%: 10-1M P : Jumper G : 13" Reeled taping 100 = 101_ 10K = 103 W: 1%: < 10; >1M J T B L : 7" Reeled taping Termination code L = Sn base (lead free) : Bulk 11%: E96: 3 significant digits followed by no. of zeros 102 =1020 37.4K =3742 * Anti-Sulfuration test conditions: H2S 3ppm, 40'C, RH 90%, 1000hrs, criteria: +/-1% ! * 100% CCD visual inspection to guarantee visual quality ! TEST AND REQUIREMENTS Essentially all tests are carried out according to the schedule of IEC publication 115-8, category LCT/UCT/56(rated temperature range : Lower Category Temperature, Upper Category Temperature; damp heat, long term, 56 days). The testing also meets the requirements specified by EIA, EIAJ and JIS. The tests are carried out in accordance with IEC publication 68, "Recommended basic climatic and mechanical robustness testing procedure for electronic components" and under standard atmospheric conditions according to IEC 60068-1, subclause 5.3. Unless otherwise specified, the following value supplied : Temperature: 15C to 35C. Relative humidity: 45% to 75%. Air pressure: 86kPa to 106 kPa (860 mbar to 1060 mbar). All soldering tests are performed with midly activated flux. TEST PROCEDURE / TEST METHOD REQUIREMENT 0 Resistor Electrical - DC resistance values measurement Within the specified tolerance Characteristics - Temperature Coefficient of Resistance (T.C.R) Refer to "QUICK REFERENCE DATA" Natural resistance change per change in degree centigrade. JISC5201-1: 1998 Clause 4.8 R2 - R1 x 106 R1 (t2 - t1 ) (ppm/C) t1 : 20C+5C-1C R1 : Resistance at reference temperature R2 : Resistance at test temperature Resistance to soldering heat Un-mounted chips completely immersed for 101second in a SAC R/R max. (0.5%+0.05) solder bath at 2705C No visible damage (R.S.H) MIL-STD-202 method 210 Page 5 of 7 ASC_MR18-20-25X_V03 June.2011 Approval sheet TEST Solderability J-STD-002 PROCEDURE / TEST METHOD a) Bake the sample for 155 dwell time 4hrs/ solder dipping 235/ 5sec. b) Steam the sample dwell time 1 hour/ solder dipping REQUIREMENT 0 Resistor 95% coverage min., good tinning and no visible damage 260/ 7sec. Temperature cycling 1000 cycles, -55 ~ +155, dwell time 5~10min R/R max. (0.5%+0.05) No visible damage JESD22 <50m Method JA-104 Moisture Resistance 652C, 80~100% RH, 10 cycles, 24 hours/ cycle R/R max. (0.5%+0.05) <50m No visible damage MIL-STD-202 method 106 Bias Humidity 1000+48/-0 hours; 85C, 85% RH, 10% of operation power MIL-STD-202 R/R max. (1.0%+0.05) No visible damage <50m R/R max. (1%+0.05) No visible damage <50m method 103 Operational Life 1000+48/-0 hours; 35% of operation power, 1252C MIL-STD-202 method 108 High Temperature 1000+48/-0 hours; without load in a temperature chamber R/R max. (1.0%+0.05) Exposure controlled 1553C No visible damage 1/2 Sine Pulse / 1500g Peak / Velocity 15.4ft/sec Within the specified tolerance <50m MIL-STD-202 Method 108 Mechanical Shock MIL-STD-202 No visible damage <50m method 213 Board Flex Resistors mounted on a 90mm glass epoxy resin PCB(FR4), R/R max. (1.0%+0.05). AEC-Q200-005 bending once 2mm for 10sec No visible damage Terminal strength Pressurizing force: 1.8Kg, Test time: 601sec. No remarkable damage or removal of Test 5g's for 20min., 12 cycles each of 3 orientations R/R max. (1.0%+0.05) the terminations AEC-Q200-006 Vibration <50m MIL-STD-202 No visible damage <50m method 204 Thermal shock Test -55 to 155/ dwell time 15min/ Max transfer time 20sec R/R max. (0.5%+0.05) MIL-STD-202 300cycles No visible damage Test contact 3.0KV R/R max. (1.0%+0.05). <50m method 107 ESD AEC-Q200-002 Page 6 of 7 No visible damage ASC_MR18-20-25X_V03 <50m June.2011 Approval sheet PACKAGING Plastic Tape specifications (unit :mm) Type A B WR18 4.900.20 3.550.30 WR20 5.500.20 2.800.20 WR25 6.900.20 3.600.20 Type P1 WR18 8.000.10 WR20 W F E 12.000.30 5.500.10 1.750.10 P0 D T 4.000.10 1.50 +-00..10 1.300.20 4.000.10 MAX1.2 WR25 Reel dimensions Symbol A B C D (unit : mm) 178.02.0 60.01.0 13.00.2 14.00.2 Taping quantity WR20, WR25 by plastic tape taping 4,000 pcs per reel. WR18 by plastic tape taping 3,000 pcs per reel Page 7 of 7 ASC_MR18-20-25X_V03 June.2011