POE International Corp SPECIFICATION OF HIGH POWER CHIP RESISTOR M01-00-E-07 Ver: 1 Page: 1 of 7 ROHS compliance WF08P 1%, 5%, 0 High Power Chip Resistors Size 0805 1/4W Customer Approval No Issue Date : : : Customer Approval : POE International Corp SPECIFICATION OF HIGH POWER 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. Lead free termination upon customer requested APPLICATION n High accuracy dc-power supply n Digital multi-meter n Telecommunication n Computer n Automotive industry n Medical and military equipment 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 SPECIFICATION OF HIGH POWER CHIP RESISTOR Ver: 1 Page: 3 of 7 QUICK REFERENCE DATA Item General Specification Series No. WF08P Size code 0805 ( 2012 ) 1%, 5% Resistance Tolerance Resistance Range 0, 1 ~ 10M ( E96+E24 series) TCR (ppm/C) -55C ~ +155C 200 ppm/C O 10 O <= 10 - 300 ~ + 500 ppm/C Max. dissipation at Tamb =70C 1/4 W Max. Operation Voltage (DC or RMS) 150V Climatic category (IEC 60068) 55/155/56 Basic specification JIS C 5202 / IEC 60115-1 Note : 1. 0 0805,size maximum resistance Rmax < 25m and rated current < 4Amp 2. This is the maximum voltage that may be continuously supplied to the resistor element, see "IEC publication 60115-8" 3. 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: Part No WF08P L 2.00 0.10 W 1.25 0.10 Tt 0.40 0.20 Tb 0.40 0.20 t 0.50 0.15 Marking 3-digits marking for 5% resistance 4-digits marking for 1% resistance POE International Corp SPECIFICATION OF HIGH POWER CHIP RESISTOR M01-00-E-07 Ver: 1 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 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 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 POWER CHIP RESISTOR Page: 5 of 7 CATALOGUE NUMBERS The resistors have a catalogue number starting with . WF08 P 4702 D T _ Size code Type code Resistance code Tolerance Packaging code Termination code WF08 P : 1/4W E96 +E24: J : 5% T 3 significant digits followed by no. of zeros F : 1% _ = SnPb base ("_" means a blank) : 0805 P : 0 n Reeled tape packaging 102 =1020 37.4K =3742 220 =2200 : 8mm width paper taping 5000pcs per 7" reel. : 7" Reeled taping L = Sn base (lead free) POE International Corp SPECIFICATION OF HIGH POWER CHIP RESISTOR M01-00-E-07 Ver: 1 Page: 6 of 7 TEST AND REQUIREMENTS Basic specification : JIS C 5201-1 : 1998 TEST clause 4.8 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~+155C >10, 200ppm/C 10, -300 ~ +500ppm/C R1 : Resistance at reference temperature R2 : Resistance at test temperature t1 : 25C clause 4.13 Short time overload clause 4.17 Solderability clause 4.18 Resistance to soldering heat Permanent resistance change after a 5 second application of no visible damage 5 times rated power or twice of the limiting element voltage, R/R max. (2.0%+0.1) whichever is less. Termination SnPb base : Unmounted chips completely good tinning (>95% covered) immersed for 20.5 sec. in a solder bath at 2355C no visible damage Termination Sn base (lead free) : Unmounted chip completely immersed in a lead free solder bath, 245C5C, 31 sec After immersion into the flux, the immersion into solder shall no visible damage be carried out in solder bath at 51 seconds, 2605C R/R max. (1.0%+0.05) clause 4.19 1. 30 minutes at -55C3C, no visible damage Temperature cycling 2. 2~3 minutes at room temperature, R/R max. (1.0%+0.05) 3. 30 minutes at +1253C, 4. 2~3 minutes at room temperature, Total 5 continuous cycles clause 4.24 Load life in Humidity 1000 hours, at rated continuous working voltage in humidity no visible damage chamber controller at 40C2C and 90~95% relative R/R max. (5%+0.1) humidity, 1.5hours on and 0.5 hours off Load life (endurance) 702C, 1000 hours, loaded with RCWV or Vmax,1.5 hours no visible damage on and 0.5 hours off R/R max. (5%+0.1) clause 4.25.3 125C, 1000 hours, no load. clause 4.25.1 Endurance at the upper category temperature clause 4.32 Bending and Termination strength no visible damage R/R max. (5%+0.1) Resistors mounted on a 90mm glass epoxy resin PCB(FR4); no visible damage bending : 3 mm, once for 10 seconds R/R max. (1.0%+0.05) Pulling test : 5N, 10 seconds POE International Corp M01-00-E-07 Ver: 1 SPECIFICATION OF HIGH POWER CHIP RESISTOR Page: 7 of 7 PACKAGING Paper Tape specifications (unit :mm) Series No. A B W F E WF08P 2.400.20 1.650.20 8.000.30 3.500.20 1.750.10 Series No. P1 P0 D T WF08P 4.000.10 4.000.10 1.50 +-00..10 Max. 1.0 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 Production location in PDC- Tau Yuan within WTC Gro