WM07B WALSIN | Alldatasheet
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Page 1 of 12 ASC_WMxxB&C Aug - 2018 WM07B, WM04B, WM07C, WM04C TC50 , TC25 High Precision Thin Film MELF Resistors Size: 0207, 0204 *Contents in this sheet are subject to change without prior notice.
Page 2 of 12 ASC_WMxxB&C Aug - 2018 FEATURE 1. SMD enabled structure thin film resistor 2. High reliability and stability of 0.5% and below per customer request 3. High precision of TCR: 50 & 25 ppm/ C and below per customer request 4. Best in class pulse load capability 5. RoHS compliant and lead free 6. AEC-Q200 compliant APPLICATION Medical equipment Measuring instrument Communication device Power / Meter Converter
DESCRIPTION
A uniform alloy film is deposited on a high grade ceramic body (Al2O3) and achieved the desired temperature coefficient by annealing. Nickel plated termination caps are firmly attached on the ceramic body. It is achieved the target value by smoothly cutting a helical groove in the resistive layer without damaging the ceramic body. The resistive film is covered by a protective coating designed for electrical, mechanical and climatic protection. For environmental soldering issue, Nickel plated terminations receive a final pure tin on it. Four color code rings designate the resistance value in accordance with IEC 60062. Fig 1. Construction of MELF
Page 3 of 12 ASC_WMxxB&C Aug - 2018 QUICK REFERENCE DATA Item General Specification Series No. WM07B WM07C WM04B WM04C Size code 0207 ( 6123 ) 0204 ( 3715 ) Resistance Tolerance 1%, 0.5%, 0.25%, 0.1% Resistance Range 0.2Ω ~1M 10~1M 0.2Ω ~1M 10~1M TCR (ppm/C) ±50ppm/C ±25ppm/C ±50ppm/C ±25ppm/C Max. dissipation at Tamb=70C 1/2W 1/4W Max. Operating Voltage (DC or RMS) 300V 200V Max. Overload Voltage (DC or RMS) 600V 400V Operating temperature - 55 ~ +125 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 ValueResistancePowerRatedRCWV or Max. RCWV listed above, whichever is lower. DIMENSIONS:( unit:mm) Type 0207 0204 L 5.90 0.20 3.50 0.10 D 2.20 0.10 1.40 0.15 K 1.40 0.10 0.90 0.10 Weight (g) 1000pcs 85.14 20.13 K L D
Page 4 of 12 ASC_WMxxB&C Aug - 2018 MARKING & RESISTANCE RANGE / TOLERANCE Standard Resistance Values E192 100 115 133 154 182 210 243 280 324 374 432 499 576 665 768 887 101 117 135 156 184 213 246 284 328 379 437 505 583 673 777 898 102 118 137 158 187 215 249 287 332 383 442 511 590 681 787 909 104 120 138 160 189 218 252 291 336 388 448 517 597 690 796 920 105 121 140 162 191 221 255 294 340 392 453 523 604 698 806 931 106 123 142 164 193 223 258 298 344 397 459 530 612 706 816 942 107 124 143 165 196 226 261 301 348 402 464 536 619 715 825 953 109 126 145 167 198 229 264 305 352 407 470 542 626 723 835 965 110 127 147 169 200 232 267 309 357 412 475 549 634 732 845 976 111 129 149 174 203 234 271 312 361 417 481 556 642 741 856 988 113 130 150 178 205 237 274 316 365 422 487 562 649 750 866 114 132 152 180 208 240 277 320 370 427 493 569 657 759 876 Color 1 Coding Color 2 Coding Color 3 Coding Color 4 Coding 0 0 100 1 1 1 101 2 2 2 102 3 3 3 103 4 4 4 104 5 5 5 105 6 6 6 7 7 7 8 8 8 10-1 9 9 9 10-2 Resistance values more than two digiting tags (<1R) or more than three digiting tags (>1R) will not provide marking. 2 4 9 10 = 2.49K 1 2 3 4 = 4 color coding
Page 5 of 12 ASC_WMxxB&C Aug - 2018 FUNCTIONAL DESCRIPTION Product characterization Standard values of nominal resistance are taken from the E192 series for resistors with a tolerance of 1%, DERATING The power that the resistor can dissipate depends on the operating temperature; see Fig.2 MOUNTING Due to their rectangular shapes and small tolerances, Surface Mountable Resistors are suitable for handling by automatic placement systems. Cylindrical placement can be on ceramic rods and printed-circuit boards (PCBs). Electrical connection to the circuit is by individual soldering condition. The end terminations guarantee a reliable contact. RECOMMEND LAND PATTERN Type 0207 0204 A (mm) 3.0 1.6 B (mm) 1.7 1.2 C (mm) 2.4 1.6 A B C
discrete components on the reverse (mixed PCBs). provide reliable joints without any damage are given in Fig 3. and Table 1. Table 1. Infrared soldering condition for MELF Resistors
Page 7 of 12 ASC_WMxxB&C Aug - 2018 CATALOGUE NUMBERS The resistors have a catalogue number starting with . WM07 C xxxx B T L Size code WM07 : 0207 WM04 : 0204 TCR code B : TCR 50 ppm C : TCR 25 ppm Resistance code 102 =1020 37.4K =3742 220 =2200 20 =20R0 0.1 =R100 0.033 =R033 Tolerance F : 1.0% D : 0.5% C : 0.25% B : 0.1% Packaging code T : Taped & Reeled Termination code L : Sn base (lead free) 1. Reeled tape packaging: 12mm width plastic taping for WM07. 2. Reeled tape packaging: 8mm width plastic taping for WM04. 2,000pcs/reel for WM07. 3,000pcs/reel for WM04.
Page 8 of 12 ASC_WMxxB&C Aug - 2018 TEST AND REQUIREMENTS (JIS C 5201-1 : 1998) TEST PROCEDURE REQUIREMENT 10Ω to 270KΩ <10Ω & >270KΩ Electrical Characteristics IEC 60115-1 4.8 - DC resistance values measurement - Temperature Coefficient of Resistance (T.C.R) Natural resistance change per change in degree centigrade. 12 1 12 10 ttR RR (ppm/ C) t 1 : 20°C+5°C-1°C R1 : Resistance at reference temperature (20°C+5°C/-1°C) R2 : Resistance at test temperature (-55°C or +125°C) Refer to “ QUICK REFERENCE DATA “ Short time overload (S.T.O.L) IEC60115-1 4.13 Permanent resistance change after a 5second applica tion of a voltage 2.5 times RCWV or the maximum overload volt age specified in the above list, whichever is less. 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 260 ±5ºC no visible damage Solderability IEC-60115-1 4.17 Un-mounted chips completely immersed for 2±0.5 seco nd in a SAC solder bath at 235 good tinning (>95% covered) no visible damage Temperature cycling JESD22 method JA- 104 Test 1000 cycles (-55 to +125 ), dwell time 30min. Maximum. Measurement at 24±4 hours after test conclusion no visible damage Biased Humidity MIL-STD-202 Method 103 1000 +48/-0 hours, loaded with 10% rated power in h umidity chamber controller at +85 Endurance IEC60115-1 4.25 1000 +48/-0 hours, loaded with RCWV or Vmax in cham ber controller 70 ±2ºC, 1.5 hours on and 0.5 hours off High Temperature Exposure MIL-STD-202 Method 108 1000 hours @ +125 , un-powered ±0.25%+0.05Ω ±1%+0.05Ω Moisture Resistance AEC-Q200 -6 MIL-STD-202 Method 106 65 2C, 80~100% RH, 10 cycles, 24 hours/ cycle ±0.25%+0.05Ω Mechanical Shock MIL-STD-202 Method 213 1/2 Sine Pulse / 100g Peak / Normal duration 6 Vibration MIL-STD-202 Method 204 5 g's for 20 min , 12 cycles each of 3 orientations Terminal strength AEC-Q200-006 1.8 kg for 60 s No broken Board flex AEC-Q200-005 Bending 2mm for 60 sec ±0.1%+0.05Ω ±0.5%+0.05Ω
Page 9 of 12 ASC_WMxxB&C Aug - 2018 PACKAGING Paper Tape specifications (unit :mm) Series No. A B W E F Series No. P0 P1 P2 D0 T Reel dimensions ABC D Symbol A B C D Taping quantity - Cylinder resistors 2,000 pcs per reel ( WM07 ) - Cylinder resistors 3,000 pcs per reel ( WM04 )
Page 10 of 12 ASC_WMxxB&C Aug - 2018 PULSE LOAD PERFORMANCE: Single Pulse Single Pulse for R ≥ 10 Ω 50 rectangular pulse amplitudes are applied to the component at intervals of 60seconds, permissible the resistance to be varied by ± (0.5% R + 0.01Ω). Continuous Pulse Continuous Pulse for R ≥ 10 Ω Continuous load is a pulse period generated by the repetitive rectangular pulse amplitude, the applied power dissipation is at a rated power of 70 ° C. Permissible the resistance to be varied by ± (0.5% R + 0.01Ω). 10us 100us 1ms 10ms 100ms 1s 10s Pulse Duration (Sec) 10us 100us 1ms 10ms 100ms 1s 10s Pulse Duration (sec) WM07 WM04 WM07 WM04
Page 11 of 12 ASC_WMxxB&C Aug - 2018 Pulse Voltage Pulse Surge Overload 1.2 / 50us Pulse According to IEC 60115-1 4.27 1.2 / 50us use 5 pulses at 12sec intervals pulse shapes test resistor,permissible the resistance to be varied by ± (0.5% R + 0.01Ω). 10us 100us 1ms 10ms 100ms 1s 10s Pulse Duration (sec) WM07 WM04 10 100 1K 10K 100K 1M Resistance (Ohm) 1.2/50us Pulse Voltage WM07 WM04
Page 12 of 12 ASC_WMxxB&C Aug - 2018 10 / 700us Pulse According to IEC 60115-1 4.27 10 / 700us use 10 pulses at 60sec intervals pulse shapes test resistor, permissible the resistance to be varied by ± (0.5% R + 0.01Ω). 10 100 1K 10K 100K 1M Resistance (Ohm) WM07 WM04 10/700us Pulse Voltage