WF08U4302DTL

Approval Sheet WF25T/U, WF20T/U, WF10T/U, WF12T/U, WF08T/U, WF06T/U, WF04T/U, WF02T/U. ±1%, ±0.5%, ±0.25%, ±0.1%, ±0.05%, ±0.01% TC50 ,TC25 High Precision Thin Film Chip Resistors Size 2512, 2010, 1210, 1206, 0805, 0603, 0402, 0201 *Contents in this sheet are subject to change without prior notice. Page 1 of 10 ASC_WFxxT & U Mar - 2019 Approval Sheet FEATURE 1. SMD metal film resistor 2. High reliability and stability of 0.25% and below per customer request 3. High performance of TCR: 50 & 25 ppm/°C and below per customer request 4. Low current noise 5. RoHS compliant and lead free APPLICATION • Medical equipment • Measuring instrument • Communication device • Computer • Printer 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 layer that is applied to the top surface of the substrate. The composition of the resistive layer 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 environmental soldering issue, the outer layer of these end terminations is a Lead-free solder . Fig 1. Construction of Chip-R WFxxT /U Page 2 of 10 ASC_WFxxT & U Mar - 2019 Approval Sheet Item General Specification Series No. Size Code WF25 WF20 WF10 WF12 WF08 WF06 WF04 WF02 T&U T&U T&U T&U T&U T&U T&U T&U 2512 2010 1210 1206 0805 0603 0402 0201 (6432) (5025) (3225) (3216) (2012) (1608) (1005) (0603) ±1.0%, ±0.5%, ±0.1% ±0.05% ±0.01% Resistance Tolerance ±1.0%, ±0.5%, ±0.25%, ±0.1%, ±0.05%,±0.02%, ±0.01% Resistance Range 1Ω ~ 3MΩ 4.7Ω ~ 3MΩ 4.7Ω ~ 2.49MΩ 1Ω ~ 2.49MΩ 4.7Ω ~ 2MΩ 3.9Ω ~ 1MΩ 10Ω ~ 255KΩ 100Ω ~ 12KΩ ± 50 & 25 ppm/°C TCR Max. Dissipation at Tamb=70°C 3/4W 1/2W 1/4W 1/8W 1/10W 1/16W 1/16W 1/32W Max. Operation Voltage 200V 200V 200V 200V 100V 50V 50V 15V Max. Overload Voltage 400V 400V 400V 400V 200V 100V 100V 30V Operating Temperature - 55~ +155’C QUICK REFERENCE DATA 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 × Resistance Value or Max. RCWV listed above, whichever is lower. DIMENSIONS:(unit: mm) Type WF25T&U WF20T&U WF10T&U WF12T&U WF08T&U WF06T&U WF04T&U WF02T&U L 6.35 ± 0.10 5.00 ± 0.10 3.10 ± 0.10 3.05 ± 0.15 2.00 ± 0.10 1.55 ± 0.10 1.00 ± 0.10 0.6 ± 0.03 W 3.20 ± 0.15 2.50 ± 0.15 2.60 ± 0.15 1.55 ± 0.15 1.25 ± 0.10 0.80 ± 0.10 0.50 ± 0.05 0.3 ± 0.03 A 0.60 ± 0.20 0.60 ± 0.20 0.50 ± 0.20 0.40 ± 0.20 0.25 ± 0.20 0.25 ± 0.15 0.30 ± 0.15 0.10 ± 0.05 B 0.90 ± 0.25 0.60 ± 0.25 0.50 ± 0.20 0.40 ± 0.20 0.40 ± 0.20 0.30 ± 0.15 0.30 ± 0.15 0.15 ± 0.05 T 0.55 ± 0.10 0.55 ± 0.10 0.55 ± 0.10 0.55 ± 0.15 0.50 ± 0.15 0.45 ± 0.15 0.35 ± 0.05 0.23 ± 0.03 Protective coat t End termination B Resistive layer A Ceramic Substrate W T Page 3 of 10 1001 L ASC_WFxxT & U Mar - 2019 Approval Sheet MARKING 3-digits marking for 0603 size WFxx T/ U has same marking rule as WRxx ±1%. Nominal resistance Description 1.E-24 series As 0603 WR06X ±5%. 2.E-96 series The 1st two digit codes are referring to the CODE on the table, the 3rd code is the index of resistance value : Y=10-2，X=10-1，A=100，B=101，C=102，D=103，E=104，F=105 EX : 17.8Ω=25X，178Ω=25A，1K78 =25B 17K8=25C， 178K=25D， 1M78=25E 3. Remark There is no marking for the items are not under E-24 and E-96 series CODE R_value CODE R_value CODE R_Value CODE R_value CODE R_value CODE R_value CODE R_value CODE R_value 01 100 13 133 25 178 37 237 49 316 61 422 73 562 85 750 02 102 14 137 26 182 38 243 50 324 62 432 74 576 86 768 03 105 15 140 27 187 39 249 51 332 63 442 75 590 87 787 04 107 16 143 28 191 40 255 52 340 64 453 76 604 88 806 05 110 17 147 29 196 41 261 53 348 65 464 77 619 89 825 06 113 18 150 30 200 42 267 54 357 66 475 78 634 90 845 07 115 19 154 31 205 43 274 55 365 67 487 79 649 91 866 08 118 20 158 32 210 44 280 56 374 68 499 80 665 92 887 09 121 21 162 33 215 45 287 57 383 69 511 81 681 93 909 10 124 22 165 34 221 46 294 58 392 70 523 82 698 94 931 11 127 23 169 35 226 47 301 59 402 71 536 83 715 95 953 12 130 24 174 36 232 48 309 60 412 72 549 84 732 96 976 4-digits marking for 2512, 2010, 1210, 1206, 0805 size For E24+E96, each resistor is marked with a four digits code on the protective coating to designate the nominal resistance value. For values below 97Ω6 the R is used as a digit. For values of 100Ω or greater, the first 3 digits are significant, the fourth digit indicates the number of multiple to follow. Example RESISTANCE 100Ω 6800Ω 47000Ω 4-digits marking 1000 6801 4702 No marking code for 0402 and 0201 size FUNCTIONAL DESCRIPTION Product characterization Standard values of nominal resistance are taken from the E192 & E24 series for resistors with a tolerance of ±1.0%, ±0.5%, ±0.25%, ±0.1%. The values of the E24/E192 series are in accordance with “IEC publication 60063”. Page 4 of 10 ASC_WFxxT & U Mar - 2019 Approval Sheet 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. 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. Page 5 of 10 ASC_WFxxT & U Mar - 2019 Approval Sheet 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 235°C during 2 seconds within lead-free solder bath. The test condition for no leaching is 260°C for 30 seconds. Typical examples of soldering profile and condition that provide reliable joints without any damage are given in Fig 3. and Table 1. Fig. 3 Infrared soldering profile for Chip Resistors Table 1. Infrared soldering condition for Chip Resistors Temperature Condition Exposure Time Average ramp-up rate (217°C to 260°C) Less than 3°C/second Between 150 and 200°C Between 60-120 seconds > 217°C Between 60-150 seconds Peak Temperature 260ºC +0/-5°C Time within 245°C Min. 30 seconds Ramp-down rate (Peak to 217°C) Less than 6°C/second Time from 25°C to Peak No greater than 480 seconds Page 6 of 10 ASC_WFxxT & U Mar - 2019 Approval Sheet CATALOGUE NUMBERS The resistors have a catalogue number starting with . WF06 Size code WF25: 2512 WF20: 2010 U Type code T: TCR= 50ppm U: TCR= 25ppm WF10: 1210 WF12: 1206 WF08: 0805 xxxx B Resistance code Tolerance R is first code followed T : ±0.01% by U: ±0.02% 3 significant digits. A : ±0.05% 100Ω =1000 B : ±0.10% 37.4KΩ =3742 C : ±0.25% WF06: 0603 D : ±0.50% WF04: 0402 F : ±1.00% T L Packaging code Termination code T : 7” Taped &Reel L : lead free A : 7” Reel 15k pcs WF02: 0201 1. Reeled tape packaging: 8mm width paper taping. 5,000pcs/reel for WF10, WF12, WF08, WF06; 10,000pcs/reel for WF04; 15,000pcs/real for WF02. 2. Reeled tape packaging: 12mm width paper taping 4,000pcs/reel for WF25,WF20. Page 7 of 10 ASC_WFxxT & U Mar - 2019 Approval Sheet TEST AND REQUIREMENTS(JIS C 5201-1 : 1998) REQUIREMENT TEST PROCEDURE Resistor DC resistance DC resistance values measured Within the specified tolerance Clause 4.5 Temperature Coefficient of Resistance(T.C.R) Clause 4.8 Natural resistance change per change in degree Refer to centigrade. “ QUICK REFERENCE DATA “ R2 − R1 × 106 R1 (t2 − t1 ) (ppm/°C) R1 : Resistance at reference temperature R2 : Resistance at test temperature t1 : 20°C+5°C-1°C t2 : 125°C+5°C-1°C Short time overload (S.T.O.L) Clause 4.13 Permanent resistance change after a 5second ∆R/R max. ±(0.1%+0.05Ω) application of a voltage 2.5 times RCWV or the maximum overload voltage specified in the above list, whichever is less. Resistance to soldering Un-mounted chips completely immersed heat(R.S.H) 10±1second in a SAC solder bath at 260℃±5ºC IEC 60068-2-58:2004 Solder ability IEC 60068-2-58:2004 Temperature cycling Clause 4.19 Load Life (Endurance) Clause 4.25 Humidity Clause 4.24 for no visible damage ∆ R/R max. ±(0.1%+0.05Ω) Un-mounted chips completely immersed for 2±0.5 good tinning (>95% covered) second in a SAC solder bath at 235℃±5℃ no visible damage 30 minutes at -55°C±3°C, 2~3 minutes at no visible damage 20°C+5°C-1°C, 30 minutes at +155 °C±3°C, 2~3 ∆R/R max. ±(0.25%+0.05Ω) minutes at 20°C+5°C-1°C, total 5 continuous cycles 70±2ºC, 1000 hours, loaded with RCWV or Vmax,1.5 ∆R/R max. ±(0.25%+0.05Ω) hours on and 0.5 hours off 1000 hours, at rated continuous working voltage in ∆R/R max. ±(0.25%+0.05Ω) humidity chamber controller at 40°C±2°C and 90~95% relative humidity, 1.5hours on and 0.5 hours off Clause 4.33 Resistors mounted on a 90mm glass epoxy resin ∆R/R max. ±(0.1%+0.05Ω) PCB(FR4); bending : 3 mm, once for 10 seconds. Adhesion Pressurizing force: 5N, Test time: 10±1sec. Bending strength Clause 4.32 Page 8 of 10 ASC_WFxxT & U No remarkable damage or removal of the terminations. Mar - 2019 Approval Sheet PACKAGING Paper Tape specifications (unit :mm) Series No. Tape A B W D E WF25 Plastic 6.90±0.20 3.60±0.20 12.00±0.30 5.50±0.10 1.75±0.10 WF20 Plastic 5.50±0.20 2.80±0.20 12.00±0.30 5.50±0.10 1.75±0.10 WF12 Paper 3.60±0.20 2.00±0.20 8.00±0.30 3.50±0.20 1.75±0.10 WF10 Paper 3.60±0.20 3.00±0.20 8.00±0.30 3.50±0.20 1.75±0.10 WF08 Paper 2.40±0.20 1.65±0.20 8.00±0.30 3.50±0.20 1.75±0.10 WF06 Paper 1.90±0.20 1.10±0.20 8.00±0.30 3.50±0.20 1.75±0.10 WF04 Paper 1.20±0.10 0.7±0.10 8.00±0.20 3.50±0.05 1.75±0.10 WF02 Paper 0.67±0.05 0.37±0.05 8.00±0.30 3.50±0.05 1.75±0.10 Page 9 of 10 Series No. P1 P0 ΦD T WF25 4.00±0.10 4.00±0.10 Φ1.50 +−00..10 Max 1.2 WF20 4.00±0.10 4.00±0.10 Φ1.50 +−00..10 Max 1.2 WF12 4.00±0.10 4.00±0.10 Φ1.50 +−00..10 Max. 1.0 WF10 4.00±0.10 4.00±0.10 Φ1.50 +−00..10 Max. 1.0 WF08 4.00±0.10 4.00±0.10 Φ1.50 +−00..10 Max. 1.0 WF06 4.00±0.10 4.00±0.10 Φ1.50 +−00..10 0.65±0.05 WF04 2.00±0.10 4.00±0.10 Φ1.50 +−00..10 0.40±0.05 WF02 2.00±0.05 4.00±0.05 Φ1.50 +−00..10 0.45±0.05 ASC_WFxxT & U Mar - 2019 Approval Sheet Reel dimensions B C A D WF25 , WF20 Symbol A B C D (unit : mm) Φ178.0±2.0 Φ60.0±1.0 13.0±0.2 14.0±0.5 WF12 , WF10 , WF08 , WF06 , WF04 Symbol A B C D (unit : mm) Φ178.0±2.0 Φ60.0±1.0 13.0±0.2 9.0±0.5 Symbol A B C D (unit : mm) Φ180 +−10..50 Φ60 +−10..50 13.0±0.2 Φ9 +−10..00 WF02 Taping quantity - Chip resistors 4,000 pcs per reel ( WF25, WF20 ) - Chip resistors 5,000 pcs per reel ( WF10, WF12, WF08, WF06 ) - Chip resistors 10,000 pcs per reel ( WF04 ) - Chip resistors 15.000 pcs per reel ( WF02 ) Page 10 of 10 ASC_WFxxT & U Mar - 2019