Thin Film High Precision Chip Resistors

Transcription

1 Thin Film High Precision Chip Resistors WF Series Size 252, 200, 20, 206, 0805, 0603, 0402, 020 Tolerance ±%, ±0.5%, ±0.25%, ±0.%, ±0.05% TCR ±50ppm, ±25ppm, ±5ppm, ±0ppm, ±5ppm RoHS Compliant *Contents in this sheet are subject to change without prior notice. Page of 8 ASC_TF_V02 Sep - 204

2 FEATURES. SMD metal film resistor 2. High reliability and stability of 0.% per customer request 3. Full product range from 020 ~ 252 size 4. Full TCR range from 50 ~ 5ppm 5. Low current noise 6. ±0.05% is available upon the customer request. 7. RoHS compliant with complete lead free APPLICATION Medical equipments Testing & Measuring instruments Communication devices Base station, AP Router, Power supply & Server High end audio system 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 Page 2 of 8 ASC_TF_V02 Sep - 204

3 QUICK REFERENCE DATA TYPE Operation temperature Rated power MWV * MOV *2 DWV *3 TCR ppm/c Resistance Range ( E24+E92) & Tolerance ±0.05% ±0.% ±0.25% ±0.5% ±% WF02 (020) +25 C /20W (± 0.5%) /30W (± 0.%) ±50-00-K K - 5V 30V 30V ±25-00-K K - ± K 0-00K 0-00K 0-00K 0-00K WF04 (0402) +55 C /6W 25V 50V 50V ± K 0-00K 0-00K 0-00K 0-00K ± K 25-20K 25-20K - - ± K 25-20K 25-20K - - ±5 25-8K 25-8K 25-8K - - ± K K K K K WF06 (0603) +55 C /6W /0W 50V 75V 00V 50V 00V 50V ± K K K K K ± K 25-00K 25-00K - - ± K 25-00K 25-00K - - ± K 25-40K 25-40K - - ± M 4.7-M 4.7-M 4.7-M 4.7-M WF08 (0805) +55 C /0W /8W 00V 50V 200V 300V 200V 300V ± M 4.7-M 4.7-M 4.7-M 4.7-M ± K K K - - ± K K K - - ± K 25-80K 25-80K - - ± M 4.7-M 4.7-M 4.7-M 4.7-M WF2 (206) +55 C /8W /4W 200V 400V 400V ± M 4.7-M 4.7-M 4.7-M 4.7-M ± K K K - - ± K K K - - ± K 25-20K 25-20K - - WF0 (20) +55 C /4W 2/5W 200V 400V 400V ±50 0-M 0-M 0-M 0-M 0-M ±25 0-M 0-M 0-M 0-M 0-M WF20 (200) +55 C /2W 3/4W 200V 400V 400V ± M 0-.5M 0-.5M 0-.5M 0-.5M ± M 0-.5M 0-.5M 0-.5M 0-.5M WF25 (252) +55 C 3/4W W 200V 400V 400V ± M 0-.5M 0-.5M 0-.5M 0-.5M ± M 0-.5M 0-.5M 0-.5M 0-.5M. This is the maximum voltage that may be continuously supplied to the resistor element, see IEC publication 605-8! 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. 2. * MWV = Max. Working Voltage; *2 MOV = Max. Overload Voltage; *3 DWV = Dielectric Withstand Voltage Page 3 of 8 ASC_TF_V02 Sep - 204

4 DIMENSIONS:( unit:mm) Type SIZE L W t A B WF ± ± ± ± ± 0.20 WF ± ± ± ± ± 0.20 WF ± ± ± ± ± 0.20 WF ± ± ± ± ± 0.20 WF ± ± ± ± ± 0.20 WF ± ± ± ± ± 0.5 WF ± ± ± ± ± 0.0 WF ± ± ± ± ± 0.05 Protective coat t B A End termination Resistive layer W T 00 Ceramic Substrate L Page 4 of 8 ASC_TF_V02 Sep - 204

5 MARKING 3-digits marking for 0603 size WF has same marking rule as WR. 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 252, 200, 20, 206, 0805 size For E24/E96 series, each resistor is marked with a four digits code on the protective coating to designate the nominal resistance value. For non E24/E96 series, no marking is applied! Example RESISTANCE 0Ω 2Ω 00Ω 6800Ω 47000Ω 4-digits marking 0R0 2R No marking code for 0402/ 020 size Page 5 of 8 ASC_TF_V02 Sep - 204

6 FUNCTIONAL DESCRIPTION Product characterization Standard values of nominal resistance are taken from the E92 & E24 series for resistors with a tolerance of ±%, ±0.5%, ±0.25%, ±0.%, ±0.05%. 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 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 processes that provide reliable joints without any damage are given in Fig 3. Page 6 of 8 ASC_TF_V02 Sep - 204

7 CATALOGUE NUMBERS The resistors have a catalogue number starting with. Size code WF06 R xxxx B T L WF25: 252 WF20: 200 WF0: 20 WF2: 206 WF08: 0805 WF06: 0603 WF04: 0402 WF02: 020 Type code T: TCR 50 Q: TCR 50 U: TCR 25 R: TCR 25: F: TCR 5 W: TCR 0 Z: TCR 5 Resistance code E92+E24: 3 significant digits followed by no. of zeros 02Ω = KΩ = Ω =2200. Reeled tape packaging: 8mm width paper taping. Tolerance F : ±.0% D : ±0.5% C: ±0.25% B : ±0.% A : ±0.05% Packaging code T : 7 RL A : 7 RL 5,000pcs/RL 5,000pcs/reel for WF0, WF2, WF08, WF06; 0,000pcs/reel for WF04; 5,000pcs/reel for WF02 2. Reeled tape packaging : 2mm width plastic taping, 4,000pcs/reel for WF25, WF20 Termination code L = Sn base (lead free) Page 7 of 8 ASC_TF_V02 Sep - 204

8 TEST AND REQUIREMENTS(JIS C 520- : 998) TEST 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 PROCEDURE DC resistance values measured at the test voltages specified below : <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 /-0 hours, loaded with RCWV or Vmax in chamber controller 70±2ºC,.5 hours on and 0.5 hours off /-0 hours, loaded with RCWV or Vmax 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 REQUIREMENT Resistor Within the specified tolerance Refer to QUICK REFERENCE DATA For TCR50/25, R/R max. ±(0.2%+0.05Ω) For TCR5/0/5, R/R max. ±(0.%+0.05Ω) no visible damage R/R max. ±(0.%+0.05Ω) good tinning (>95% covered) no visible damage no visible damage For TCR50/25, R/R max. ±(0.2%+0.05Ω) For TCR5/0/5, R/R max. ±(0.%+0.05Ω) For TCR50/25, R/R max. ±(0.5%+0.05Ω) For TCR5/0/5, R/R max. ±(0.25%+0.05Ω) For TCR50/25, R/R max. ±(0.5%+0.05Ω) For TCR5/0/5, R/R max. ±(0.25%+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 8 ASC_TF_V02 Sep - 204

9 PACKAGING Tape specifications (unit :mm) Series No. A B W F E WF ± ± ± ±0.0.75±0.0 WF ± ± ± ±0.0.75±0.0 WF0 3.60± ± ± ± ±0.0 WF2 3.60± ± ± ± ±0.0 WF ± ± ± ± ±0.0 WF06.90±0.20.0± ± ± ±0.0 WF04.20± ± ± ± ±0.0 WF ± ± ± ± ±0.0 Series No. P P0 ΦD T WF ± ± Φ.50 WF ± ± Φ.50 MAX.2 MAX.2 WF0 4.00± ± Φ.50 + Max..0 WF2 4.00± ± Φ.50 + Max..0 WF ± ± Φ.50 + Max..0 WF ± ± Φ ±0.05 WF ± ± Φ ±0.05 WF ± ± Φ ±0.05 Remark: Plastic tape for WF25, WF20; Paper tape for WF0, WF2, WF08, WF06, WF04, WF02. Page 9 of 8 ASC_TF_V02 Sep - 204

10 C B A D Symbol A B C D (unit : mm) Φ78.0±2.0 Φ60.0±.0 3.0± ±0.5 Taping quantity - Chip resistors 4,000 pcs per reel ( WF25, WF20 ) - Chip resistors 5,000 pcs per reel ( WF0, WF2, WF08, WF06 ) - Chip resistors 0,000 pcs per reel ( WF04 ) - Chip resistors 5,000 pcs per reel ( WF02 ) - Page 0 of 8 ASC_TF_V02 Sep - 204