POE International Corp SPECIFICATION OF HIGH OHMIC CHIP RESISTOR M01-00-E-07 Ver: 1 Page: 1 of 7 ROHS compliance WF12G, WF08G, WF06G, WF04G 5% High ohmic chip resistors Size 1206, 0805, 0603, 0402 Customer : Approval No : Issue Date : Customer Approval : POE International Corp SPECIFICATION OF HIGH OHMIC CHIP RESISTOR M01-00-E-07 Ver: 1 Page: 2 of 7 FEATURE 1. Small size and light weight 2. High reliability and stability 3. Reduced size of final equipment 4. High precision 5. Higher component and equipment reliability 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 a Lead-tin or Tin (lead free) alloy. Fig 1. Consctruction of Chip-R POE International Corp M01-00-E-07 Ver: 1 SPECIFICATION OF HIGH OHMIC CHIP RESISTOR Page: 3 of 7 QUICK REFERENCE DATA Item General Specification Series No. WF12G WF08G WF06G WF04G Size code 1206 ( 3216 ) 0805 ( 2125 ) 0603 ( 1608 ) 0402 ( 1005 ) Resistance Range and tolerance 5% tolerance 10M < R 30M ( E24 series) 300 ppm/C TCR (ppm/C) Max. dissipation at Tamb =70C 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) 55/125/56 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 x Resistance Value or Max. RCWV listed above, whichever is lower. Dimensions: series WF12G WF08G WF06G WF04G L 3.10 0.10 1.60 0.10 0.50 0.20 0.45 0.20 0.60 0.15 2.00 0.10 1.25 0.10 0.40 0.20 0.40 0.20 0.50 0.15 1.60 0.10 1.00 0.05 0.80 0.10 0.50 0.05 0.30 0.10 0.20 0.10 0.30 0.20 0.25 0.10 0.45 0.15 0.35 0.05 W Tt Tb T Marking 3-digits marking Each resistor is marked with a three digits code on the protective coating to designate the nominal resistance value. For values up to 910 the R is used as a decimal point. For values of 1K or greater the first 3 digits apply to the resistance value and fourth indicate the number of zeros to follow. Example 306 = 30 M 186 = 18 M POE International Corp M01-00-E-07 Ver: 1 SPECIFICATION OF HIGH OHMIC CHIP RESISTOR Page: 4 of 7 FUNCTIONAL DESCRIPTION Product characterization Standard values of nominal resistance are taken from the E96 & E24 series for resistors with a tolerance of 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 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. SOLDERING CONDITION The robust construction of chip resistors allows them to be completely immersed in a solder bath of 260C for one minute. 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 230C during 2 seconds. The test condition for no leaching is 260C for 60 seconds. Typical examples of soldering processes that provide reliable joints without any damage are given in Fig 3. Fig 3. Infrared soldering profile for Chip Resistors POE International Corp M01-00-E-07 Ver: 1 SPECIFICATION OF HIGH OHMIC CHIP RESISTOR Page: 5 of 7 CATALOGUE NUMBERS The resistors have a catalogue number starting with : WF06 G 226_ J T _ Size code Type code Resistance code Tolerance Packaging code Termination code WF12 : 1206 G : High ohmic >10M E24: J : 5% T : 7" Reeled taping WF08 : 0805 B : Bulk _ = SnPb base ("_" means a blank) WF06 : 0603 WF04 : 0402 2 significant digits followed by no. of zeros and a blank 11M =116_ 22M =226_ 30M =306_ L = Sn base (lead free) ("_" means a blank) 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 TEST Temperature Coefficient of Resistance (TCR ) PROCEDURE Natural resistance change per change in degree centigrade. R2 - R1 x 106 R1 (t2 - t1 ) (ppm/C) REQUIREMENT Test temperature -55~+125C 300ppm/C R1 : Resistance at reference temperature R2 : Resistance at test temperature t1 : 25C Short time overload (STOL ) Permanent resistance change after a 5second application of a R/R max. (3%+0.10) voltage 2.5 times RCWV or the maximum overload voltage specified in the above list, whichever is less. Resistance to soldering heat Unmounted chips 101 seconds, 2605C Solderability Termination SnPb base : Unmounted chips completely good tinning (>95% covered) immersed for 20.5 sec. in a solder bath at 2305C no visible damage Termination Sn base (lead free) : Unmounted chip completely immersed in a lead free solder bath, 245C5C, 31 sec Temperature cycling 1. 30 minutes at -55C3C, no visible damage 2. 2~3 minutes at room temperature, R/R max. (3%+0.10) 3. 30 minutes at +1253C, 4. 2~3 minutes at room temperature, no visible damage R/R max. (2%+0.10) Total 5 continuous cycles POE International Corp SPECIFICATION OF HIGH OHMIC CHIP RESISTOR TEST PROCEDURE M01-00-E-07 Ver: 1 Page: 6 of 7 REQUIREMENT Load life (endurance) 702C, 1000 hours, loaded with RCWV or Vmax,1.5 hours on R/R max. (3%+0.1) and 0.5 hours off Load life in Humidity 1000 hours, at rated continuous working voltage in humidity R/R max. (5%+0.1) chamber controller at 40C2C and 90~95% relative humidity, 1.5hours on and 0.5 hours off Bending and Termination strength Resistors mounted on a 90mm glass epoxy resin PCB(FR4); R/R max. (1%+0.10) bending : 5 mm, once for 10 seconds Pulling test : 500grams POE International Corp M01-00-E-07 Ver: 1 SPECIFICATION OF HIGH OHMIC CHIP RESISTOR Page: 7 of 7 PACKAGING Paper Tape specifications (unit :mm) A B W F E WF12G 3.600.20 2.000.20 8.000.30 3.500.2 1.750.10 WF08G 2.400.20 1.650.20 8.000.30 3.500.2 1.750.10 WF06G 1.900.20 1.100.20 8.000.30 3.500.2 1.750.10 P1 P0 D T 4.000.10 4.000.10 Series No. Series No. WF12G WF08G 4.000.10 4.000.10 WF06G 4.000.10 4.000.10 0.650.1 1.50 +-00..10 0.650.1 0.650.1 Reel dimensions Symbol A B C D (unit : mm) 178.02.0 60.01.0 13.00.2 9.00.5 Taping quantity - Chip resistors 5,000 pcs/reel for 1206, 0805, 0603 ( 10,000 pcs/reel for 0402 )