MR18X WALSIN | Alldatasheet
Document overview
- Manufacturer or author: Provided By ALLDATASHEET.COM(FREE DATASHEET DOWNLOAD SITE)
- PDF pages: 7
Technical content
Page 1 of 7 ASC_MR18-20-25X_V04 DEC 2016 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 2 of 7 ASC_MR18-20-25X_V04 DEC 2016 FEATURE 1. High power rating and compact size 2. High reliability and stability 3. Automotive AEC Q-200 compliant 4. 100% CCD visual inspection 5. 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 gra de 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 a nd 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 3 of 7 ASC_MR18-20-25X_V04 DEC 2016 QUICK REFERENCE DATA Item General Specification Series No. MR18 MR20 MR25 Size code 1218(3248) 2010 ( 5025 ), 2512(6432) Resistance Tolerance 5% (E24); 1% (E24+E96) Resistance Range 1 ~ 10M, Jumper (0) TCR (ppm/C) < 10 10 ~ 1M > 1M 200 ppm/C 200 ppm/C 200 ppm/C 100 ppm/C 100 ppm/C 100 ppm/C 200 ppm/C 200 ppm/C 200 ppm/C Max. dissipation at Tamb=70C 1W 0.75 W 1W Max. Operation Voltage (DC or RMS) 200V 200V 250V Max. Overload Voltage (DC or RMS) 400V 400V 500V Climatic category (IEC 60068) 55/155/56 Test conditions for jumper ( 0 ohm ) Type MR18X MR20X MR25X Power Rating At 70C 1 W 3/4 W 1 W Resistance Max. 50mR Max. 50mR Max. 50mR Rated Current 4.5 A 3.2 A 4.5 A Peak Current 11 A 8 A 11 A 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 ValueResistancePower RatedRCWV or Max. RCWV listed above, whichever is lower. MECHANICAL DATA (unit : mm) TYPE MR18 MR20 MR25
Page 4 of 7 ASC_MR18-20-25X_V04 DEC 2016 MARKING Each resistor is marked with a four -digit code on the protective coating to designa te 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 suita ble 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 260 C 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 260 C 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 5 of 7 ASC_MR18-20-25X_V04 DEC 2016 CATALOGUE NUMBERS The resistors have a catalogue number starting with . MR25 X 472_ J T L Size code MR25 : 2512 MR20 : 2010 MR18 : 1218 Type code X : 5%: 1-10M 1%: 10-1M W : Resistance code 5%: E24: 2 significant digits followed by no. of zeros 100 = 101_ 10K = 103 11%: E96: 3 significant digits followed by no. of zeros 102 =1020 37.4K =3742 Tolerance F : 1% J : 5% P : Jumper Packaging code T : 7” Reeled taping Q : 10” Reeled taping G : 13” Reeled taping B : Bulk Termination code L = Sn base (lead free) * 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 un der standard atmospheric conditions according to IEC 60068-1, subclause 5.3. Unless otherwise specified, the following value supplied : Temperature: 15°C to 35°C. 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 Resistor 0 Electrical Characteristics JISC5201-1: 1998 Clause 4.8 - DC resistance values measurement - Temperature Coefficient of Resistance (T.C.R) Natural resistance change per change in degree centigrade. 121 12 10 ttR RR (ppm/C) t1 : 20°C+5°C-1°C R1 : Resistance at reference temperature R2 : Resistance at test temperature Within the specified tolerance Refer to “QUICK REFERENCE DATA” Resistance to soldering heat (R.S.H) MIL-STD-202 method 210 Un-mounted chips completely immersed for 10±1second in a SAC solder bath at 270℃±5ºC No visible damage
Page 6 of 7 ASC_MR18-20-25X_V04 DEC 2016 TEST PROCEDURE / TEST METHOD REQUIREMENT Resistor 0 Solderability J-STD-002 a) Bake the sample for 155℃ dwell time 4hrs/ solder dipping 235℃/ 5sec. b) Steam the sample dwell time 1 hour/ solder dippi ng 260℃/ 7sec. 95% coverage min., good tinning and no visible damage Temperature cycling JESD22 Method JA-104 1000 cycles, -55℃ ~ +155℃, dwell time 5~10min R/R max. (0.5%+0.05) No visible damage <50m Moisture Resistance MIL-STD-202 method 106 652C, 80~100% RH, 10 cycles, 24 hours/ cycle R/R max. (0.5%+0.05) No visible damage <50m Bias Humidity MIL-STD-202 method 103 1000+48/-0 hours; 85C, 85% RH, 10% of operation power R/R max. (1.0%+0.05) No visible damage <50m Operational Life MIL-STD-202 method 108 1000+48/-0 hours; 35% of operation power, 1252C R/R max. (1%+0.05) No visible damage <50m High Temperature Exposure MIL-STD-202 Method 108 1000+48/-0 hours; without load in a temperature chamber controlled 1553C No visible damage <50m Mechanical Shock MIL-STD-202 method 213 1/2 Sine Pulse / 1500g Peak / Velocity 15.4ft/sec Within the specified tolerance No visible damage <50m Board Flex AEC-Q200-005 Resistors mounted on a 90mm glass epoxy resin PC B(FR4), bending once 2mm for 10sec No visible damage <50m Terminal strength AEC-Q200-006 Pressurizing force: 1.8Kg, Test time: 60±1sec. No remarkable damage or removal of the terminations Vibration MIL-STD-202 method 204 Test 5g’s for 20min., 12 cycles each of 3 orientations R/R max. (1.0%+0.05) No visible damage <50m Thermal shock MIL-STD-202 method 107 Test –55 to 155℃/ dwell time 15min/ Max transfer time 20sec 300cycles No visible damage <50m ESD AEC-Q200-002 No visible damage <50m
Page 7 of 7 ASC_MR18-20-25X_V04 DEC 2016 PACKAGING Plastic Tape specifications (unit :mm) Type A B W F E MR18 4.90±0.20 3.55±0.30 MR25 6.90±0.20 3.60±0.20 Type P1 P0 D T MR18 8.00±0.10 4.00±0.10 1.0 0.050.1 1.30±0.20 MR20 4.00±0.10 MAX1.2 MR25 Reel dimensions Symbol A B C D Taping quantity MR20, MR25 by plastic tape taping 4,000 pcs per reel. MR18 by plastic tape taping 3,000 pcs per reel