WF08G206JTL

Approval sheet WF12G, WF08G, WF06G, WF04G ±1%, ±5%, 11MΩ~100MΩ High ohm chip resistors Size 1206, 0805, 0603, 0402 *Contents in this sheet are subject to change without prior notice Page 1 of 7 ASC_WFxxG_V13 Feb - 2015 Approval sheet FEATURE 1. Small size and light weight 2. High reliability and stability 3. Reduced size of final equipment 4. Higher component and equipment reliability 5. RoHS compliant and lead free products. APPLICATION • Power supply • PDA • Digital meter • Computer • Palmtop computers 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 paste that is applied to the top surface of the substrate. The composition of the paste 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 ease of soldering the outer layer of these end terminations is Tin (lead free) alloy. Fig 1. Construction of Chip-R Page 2 of 7 ASC_WFxxG_V13 Feb - 2015 Approval sheet QUICK REFERENCE DATA Item General Specification Series No. WF12G WF08G WF06G WF04G Size code 1206 ( 3216 ) 0805 ( 2125 ) 0603 ( 1608 ) 0402 ( 1005 ) ±1%, ±5% Resistance Tolerance Resistance Range TCR (ppm/°C) 10MΩ < R ≤ 100MΩ 10MΩ < R ≤ 30MΩ ( E24 series) ≤ ± 200 ppm/°C ≤ ± 300 ppm/°C Max. dissipation at Tamb=70°C 1/4 W 1/8 W 1/10 W 1/16W Max. Operation Voltage (DC or RMS) 200V 150V 50V 50V Climatic category (IEC 60068) 55/155/56 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) series WF12G WF08G WF06G WF04G L 3.10 ± 0.15 2.00 ± 0.10 1.60 ± 0.10 1.00 ± 0.05 W 1.60 ± 0.15 1.25 ± 0.10 0.80 ± 0.10 0.50 ± 0.05 Tt 0.50 ±0.25 0.40 ± 0.20 0.30 ± 0.10 0.20 ± 0.10 Tb 0.50 ± 0.25 0.40 ± 0.20 0.30 ± 0.15 0.25 ± 0.10 T 0.55 ± 0.10 0.50 ± 0.15 0.45 ± 0.15 0.35 ± 0.05 MARKING 3-digits marking Each resistor is marked with a three digits code on the protective coating to designate the nominal resistance value. Example 306 = 30 MΩ 186 = 18 MΩ Page 3 of 7 ASC_WFxxG_V13 Feb - 2015 Approval sheet FUNCTIONAL DESCRIPTION Product characterization Standard values of nominal resistance are taken from the E96 & E24 series for resistors with a tolerance of ±1%, ±5%. The values of the E24/E96 series are in accordance with “IEC publication 60063”. Derating The power that the resistor can dissipate depends on the operating temperature; see Fig.2 Figure 2. Maximum dissipation in percentage of rated power As a function of the ambient temperature 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. 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 below. WF04G is not guaranteed with wave soldering process due to its 0402 size. Page 4 of 7 ASC_WFxxG_V13 Feb - 2015 Approval sheet CATALOGUE NUMBERS The resistors have a catalogue number starting with : WF06 G 226_ J T L Size code Type code Resistance code Tolerance Packaging code Termination code WF12 : 1206 G : High ohmic >10MΩ J : ±5% T : 7” Reeled taping WF08 : 0805 1206 size=0.25W 5% E24: 2 significant digits followed by no. of zeros and a blank F : ±1% B : Bulk L = Sn base (lead free) WF06 : 0603 0805 size=0.125W WF04 : 0402 0603 size=0.10W 11MΩ =116_ 22MΩ =226_ 30MΩ =306_ (“_” means a blank) 1%, E24+E96: 3 significant digits followed by no. of zeros 100Ω =1000 37.4KΩ =3742 1. Reeled tape packaging : 8mm width paper taping 5000pcs per 7” reel for 1206, 0805, 0603 ( 10,000pcs for 0402 ) 2. Bulk packaging : 5000pcs per polybag TEST AND REQUIREMENTS(JIS C 5201-1 : 1998) TEST Temperature Coefficient of Resistance (T.C.R) Clause 4.8 PROCEDURE Natural resistance change per change in degree centigrade. R2 − R1 × 106 R1 (t2 − t1 ) REQUIREMENT Refer to quick reference data for T.C.R specification. (ppm/°C) R1 : Resistance at reference temperature R2 : Resistance at test temperature t1 : 20°C+5°C-1°C t2 : Test temperature. Short time overload (S.T.O.L) Permanent resistance change after a 5 second application of a No visible damage. voltage 2.5xUR or max. Overload voltage, whichever is less. ∆R/R max. J:≦ ±(2%+0.1Ω) Clause 4.13 Solderability Clause 4.17 Resistance to soldering heat(R.S.H) F:≦ ±(1%+0.05Ω) Un-mounted chips completely immersed for 2±0.5 second in a SAC good tinning (>95% covered) solder bath at 235℃±5℃. no visible damage Un-mounted chips completely immersed for 10±1second in a SAC No visible damage. solder bath at 260℃±5ºC ∆R/R max. J:≦ ±(1%+0.1Ω) F:≦ ±(0.5%+0.05Ω) Clause 4.18 Page 5 of 7 ASC_WFxxG_V13 Feb - 2015 Approval sheet TEST PROCEDURE REQUIREMENT Temperature cycling 1. 30 minutes at -55°C±3°C, No visible damage. Clause 4.19 2. 2~3 minutes at 20°C+5°C-1°C, ∆R/R max. J≦ ±(1%+0.1Ω) 3. 30 minutes at +155°±3°C, 4. 2~3 minutes at 20°C+5°C-1°C, F≦ ±(0.5%+0.05Ω) Total 5 continuous cycles. Load life (endurance) 1000 +48/-0 hours, loaded with RCWV or Vmax in chamber No visible damage. controller 70±2ºC, 1.5 hours on and 0.5 hours off ∆R/R max. J≦ ±(3%+0.1Ω) Clause 4.25 F≦ ±(1%+0.05Ω) Load life in Humidity 1000 +48/-0 hours, loaded with RCWV or Vmax in humidity chamber No visible damage. controller at 40°C±2°C and 90~95% relative humidity, 1.5hours on Clause 4.24 ∆R/R max. J≦ ±(3%+0.1Ω) and 0.5 hours off F≦ ±(1%+0.05Ω) Bending strength Clause 4.33 Adhesion Resistors mounted on a 90mm glass epoxy resin PCB(FR4); ∆R/R max. ±(1%+0.10Ω) bending : 3 mm, once for 10 seconds Pressurizing force: 5N, Test time: 10±1sec. Clause 4.32 Insulation Resistance Apply the maximum overload voltage (DC) for 1minute No remarkable damage or removal of the terminations. R≧10GΩ Clause 4.6 Dielectric Withstand Apply the maximum overload voltage (AC) for 1 minute No breakdown or flashover Voltage Clause 4.7 Page 6 of 7 ASC_WFxxG_V13 Feb - 2015 Approval sheet PACKAGING Paper Tape specifications (unit :mm) Series No. A B W F E WF12G 3.60±0.20 2.00±0.20 8.00±0.30 3.50±0.2 1.75±0.10 WF08G 2.40±0.20 1.65±0.20 8.00±0.30 3.50±0.2 1.75±0.10 WF06G 1.90±0.20 1.10±0.20 8.00±0.30 3.50±0.2 1.75±0.10 WF04G 1.20±0.10 0.70±0.10 8.00±0.30 3.50±0.2 1.75±0.10 P1 P0 ΦD T WF12G 4.00±0.10 4.00±0.10 WF08G 4.00±0.10 4.00±0.10 WF06G 4.00±0.10 4.00±0.10 WF04G 2.00±0.10 4.00±0.10 Series No. Max. 1.0 Φ1.50 +−00..10 0.65±0.1 0.40±0.05 Reel dimensions Symbol A B C D (unit : mm) Φ178.0±2.0 Φ60.0±1.0 13.0±0.2 9.0±0.5 Taping quantity - Chip resistors 5,000 pcs/reel for 1206, 0805, 0603 ( 10,000 pcs/reel for 0402 ) Page 7 of 7 ASC_WFxxG_V13 Feb - 2015