TC50 High Precision Power Thin Film chip resistors (RoHS compliant Halogen Free) Size 1206, 0805, 0603

Transcription

1 WF2Q, WF08Q, WF06Q ±%, ±0.5%, ±0.25%, ±0.%, ±0.05% TC50 High Precision Power Thin Film chip resistors (RoHS compliant Halogen Free) Size 206, 0805, 0603 *Contents in this sheet are subject to change without prior notice. Page of 9 ASC_WFxxQ_V2 Dec. 205

2 FEATURE. SMD metal film resistor 2. High reliability and stability of ± 0.5% and below per customer request 3. High performance of TCR: 50 ppm/k and below per customer request 4. High power rating 5. Low current noise APPLICATION. Medical equipment 2. Measuring instrument 3. Communication device 4. Computer 5. 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. Construction of Chip-R WFxxQ Page 2 of 9 ASC_WFxxQ_V2 Dec. 205

3 QUICK REFERENCE DATA Item General Specification Series No. WF2Q WF08Q WF06Q Size code 206 ( 326 ) 0805 ( 202 ) 0603( 608 ) Resistance Tolerance ±%, ±0.5%, ±0.25%, ±0.%, ±0.05% Resistance Range 4.7Ω ~ MΩ 4.7Ω ~ MΩ 4.7Ω ~ 680KΩ ( E24 +E92 ) ( E24 +E92 ) ( E24 +E92 ) TCR (ppm/ C) +50 ~ -50 ppm/ C Max. dissipation at T amb=70 C /4W /8W /0W Max. Operation Voltage (DC or RMS) 200V 50V 75V Max. Overload Voltage (DC or RMS) 400V 300V 50V Operation temperature - 55~ +55 C Note :. This is the maximum voltage that may be continuously supplied to the resistor element, see IEC publication 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. 3. Tolerance ±0.05% is upon requested DIMENSIONS:(unit:mm) Type WF2Q WF08Q WF06Q L 3.05 ± ± ± 0.0 W.55 ± ± ± 0.0 A 0.40 ± ± ± 0.5 B 0.40 ± ± ± 0.5 t 0.55 ± ± ± 0.5 Protective coat t B A End termination Resistive layer W T 00 Ceramic Substrate L Page 3 of 9 ASC_WFxxQ_V2 Dec. 205

4 MARKING 3-digits marking for 0603 size WFxxQ has same marking rule as commodity ±%. 3-digits marking(±% : 0603) Nominal resistance.e-24 series As 0603 WR06X ±5%. 2.E-96 series Description The st two digit codes are referring to the CODE on the table, the 3rd code is the index of resistance value : Y=0-2,X=0 -,A=0 0,B=0,C=0 2,D=0 3,E=0 4,F=0 5 EX : 7.8Ω=25X,78Ω=25A,K78 =25B 7K8=25C, 78K=25D, M78=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 digits marking for 0805/206 size Each resistor is marked with a four digits code on the protective coating to designate the nominal resistance value of E24+E96. For values below 97Ω6 the R is used as a digit. For values of 00Ω or greater, the first 3 digits are significant, the fourth digit indicates the number of multiple to follow. Example RESISTANCE 0Ω 2Ω 00Ω 6800Ω 47000Ω 4-digits marking 0R0 2R Page 4 of 9 ASC_WFxxQ_V2 Dec. 205

5 FUNCTIONAL DESCRIPTION Product characterization Standard values of nominal resistance are taken from the E24 & E92 series for resistors with a tolerance of ±%, ±0.5%, ±0.25%, ±0.%. The values of the E24/E92 series are in accordance with IEC publication 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 9 ASC_WFxxQ_V2 Dec. 205

6 SOLDERING CONDITION The robust construction of chip resistors allows them to be completely immersed in a solder bath of 260 C for 0 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. Fig. 3 Infrared soldering profile for Chip Resistors Table. Infrared soldering condition for Chip Resistors Temperature Condition Exposure Time Average ramp-up rate (27 C to 260 C) Less than 3 C/second Between 50 and 200 C Between seconds > 27 C Between seconds Peak Temperature 260ºC +0/-5 C Time within 245 C Min. 30 seconds Ramp-down rate (Peak to 27 C) Less than 6 C/second Time from 25 C to Peak No greater than 480 seconds Page 6 of 9 ASC_WFxxQ_V2 Dec. 205

7 CATALOGUE NUMBERS The resistors have a catalogue number starting with. WF08 Q xxxx D T L Size code WF2: 206 WF08: 0805 WF06: 0603 Type code Q: TCR 50ppm & High power Resistance code E24 +E92: 3 significant digits followed by no. of zeros 02Ω = KΩ = Ω =2200. Reeled tape packaging: 8mm width paper taping. 5,000pcs/reel for WF2Q, WF08Q, WF06Q; Tolerance A : ±0.05% B : ±0.0% C : ±0.25% D : ±0.50% F : ±.0% Packaging code T : Reeled Termination code L = Sn base (lead free) Page 7 of 9 ASC_WFxxQ_V2 Dec. 205

8 TEST AND REQUIREMENTS(JIS C 520- : 998) TEST PROCEDURE REQUIREMENT DC resistance Clause 4.5 Temperature Coefficient of Resistance(T.C.R) Clause 4.8 Short time overload (S.T.O.L) Clause 4.3 Resistance to soldering heat(r.s.h) Clause 4.8 Solderability Clause 4.7 Temperature cycling Clause 4.9 Load life (endurance) Clause 4.25 Load life in Humidity Clause 4.24 Bending strength Clause 4.33 Adhesion Clause 4.32 Insulation Resistance Clause 4.6 Dielectric Withstand Voltage DC resistance values measured <0Ω@0.V, <00Ω@0.3V, <KΩ@.0V, <0KΩ@3V, <00KΩ@0V,<MΩ@25V, <0MΩ@30V Natural resistance change per change in degree centigrade. R R R ( t t ) 2 (ppm/ C) R : Resistance at reference temperature R 2 : Resistance at test temperature t : 20 C+5 C- C t2 : 25 C+5 C- C Permanent resistance change after a 5second application of a voltage 2.5 times RCWV or the maximum overload voltage specified in the above list, whichever is less. Un-mounted chips completely immersed for 0±second in a SAC solder bath at 260 ±5ºC Un-mounted chips completely immersed for 2±0.5 second in a SAC solder bath at 235 ±5 30 minutes at -55 C±3 C, 2~3 minutes at 20 C+5 C- C, 30 minutes at +55 C±3 C, 2~3 minutes at 20 C+5 C- C, total 5 continuous cycles 70±2ºC, 000 hours, loaded with RCWV or Vmax,.5 hours on and 0.5 hours off 000 hours, at rated continuous working voltage in humidity chamber controller at 40 C±2 C and 90~95% relative humidity,.5hours on and 0.5 hours off Resistors mounted on a 90mm glass epoxy resin PCB(FR4); bending : 3 mm, once for 0 seconds. Pressurizing force: 5N, Test time: 0±sec. Apply the maximum overload voltage (DC) for minute Apply the maximum overload voltage (AC) for minute Within the specified tolerance Refer to QUICK REFERENCE DATA R/R max. ±(0.5%+0.05Ω) no visible damage R/R max. ±(0.25%+0.05Ω) good tinning (>95% covered) no visible damage no visible damage R/R max. ±(0.5%+0.05Ω) R/R max. ±(0.5%+0.05Ω) R/R max. ±(0.5%+0.05Ω) R/R max. ±(0.%+0.05Ω) No remarkable damage or removal of the terminations. R 0GΩ No breakdown or flashover Clause 4.7 Page 8 of 9 ASC_WFxxQ_V2 Dec. 205

9 PACKAGING Paper Tape specifications (unit :mm) Series No. A B W D E WF2 3.60± ± ± ± ±0.0 WF ± ± ± ± ±0.0 WF06.90±0.20.0± ± ± ±0.0 Series No. F P0 ΦD T WF2 4.00± ± Φ Max..0 WF ± ± Φ Max..0 WF ± ± Φ ±0.05 Reel dimensions Symbol A B C D (unit : mm) Φ78.0±2.0 Φ60.0±.0 3.0± ±0.5 Taping quantity - Chip resistors 5,000 pcs per reel ( WF2Q, WF08Q, WF06Q ) Page 9 of 9 ASC_WFxxQ_V2 Dec. 205