POE International Corp SPECIFICATION OF POWER CHIP RESISTOR M01-00-E-07 Ver: 1 Page: 1 of 7 ROHS compliance WF20P 1%, 5% Power chip resistors Size 2010, 1 watt Customer : Approval No : Issue Date : Customer Approval : POE International Corp SPECIFICATION OF POWER CHIP RESISTOR M01-00-E-07 Ver: 1 Page: 2 of 7 FEATURE 1. 1 watt high power rating and compact size 2. High reliability and stability 3. Reduced size of final equipment 4. Lead free product is available. APPLICATION * Power supply * PDA * Digital meter * Computer * Automotives * Battery charger * DC-DC power converter 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 (Pb free) alloy. Fig 1. Consctruction of Chip-R POE International Corp M01-00-E-07 Ver: 1 SPECIFICATION OF POWER CHIP RESISTOR Page: 3 of 7 QUICK REFERENCE DATA Item General Specification Series No. WF20P Size code 2010 (5025) 5% (E24); 1% (E24+E96) Resistance Tolerance Resistance Range TCR (ppm/C) 1 ~ 10M 1 Rn < 9.76 300 ppm/C 10 Rn < 1M 200 ppm/C 1M Rn < 10M 300 ppm/C Max. dissipation at Tamb=70C 1W Max. Operation Voltage (DC or RMS) 200V Max. Overload Voltage (DC or RMS) 400V 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. Mechanical Data Symbol Dimensions (mm) L 5.000.20 W 2.500.20 T 0.550.10 Tt 0.650.25 Tb 0.600.25 POE International Corp SPECIFICATION OF POWER CHIP RESISTOR M01-00-E-07 Ver: 1 Page: 4 of 7 Marking Each resistor is marked with a four-digit code on the protective coating to designate the nominal resistance value. Example: 1R00 = 1 1001 = 1000 FUNCTIONAL DESCRIPTION Product characterization Standard values of nominal resistance are taken from the E96 & E24 series for resistors with a tolerance of 5% & 1%. The values of the E24/E96 series are in accordance with "IEC publication 60063". Derating curve The power that the resistor can dissipate depends on the operating temperature; see Fig.2 Fig. 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. POE International Corp M01-00-E-07 Ver: 1 SPECIFICATION OF POWER CHIP RESISTOR Page: 5 of 7 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 WF20P CATALOGUE NUMBERS The resistors have a catalogue number starting with . WF20 P 472_ Size code Type code Resistance code Tolerance Packaging code Termination code WF20 : 2010 P : High power type E24 : 2 significant digits followed by no. of zeros and a blank F : 1% T : 7" Reeled taping _ = SnPb base ("_" means a blank) 4.7 =4R7_ 10 =100_ 220 =221_ Jumper =000_ ("_" means a blank) E96 : 3 significant digits followed by no. of zeros 102 =1020 37.4K =3742 J J : 5% T _ L = Sn base (lead free) POE International Corp M01-00-E-07 Ver: 1 SPECIFICATION OF POWER CHIP RESISTOR Page: 6 of 7 TEST AND REQUIREMENTS TEST DC resistance PROCEDURE DC resistance values measured at the test voltages Within the specified tolerance specified below : <10@0.1V, <10K@3V, <10M@30V Temperature Coefficient of Resistance ( TCR ) REQUIREMENT <100@0.3V, <100K@10V, Natural resistance centigrade. R2 - R1 x 106 R1 (t2 - t1 ) change per <1K@1.0V, <1M@25V, change (ppm/C) in degree Test temperature -55 ~ +125C 1 Rn < 9.76, 300 ppm/C 10 Rn < 1M, 200 ppm/C 1M Rn < 10M, 300 ppm/C R1 : Resistance at reference temperature R2 : Resistance at test temperature t1 : 25C Short time overload (STOL) Permanent resistance change after a 5second application R/R max. (2%+0.1) of a 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 Isolation voltage AC 500V, 60 sec. no visible damage or flashover R1G Temperature cycling 1. 30 minutes at -55C3C, no visible damage 2. 2~3 minutes at room temperature, R/R max. (1%+0.05) 3. 30 minutes at +1253C, 4. 2~3 minutes at room temperature, no visible damage R/R max. (1%+0.05) Total 5 continuous cycles Load life (endurance) 702C, 1000 hours, loaded with RCWV or Vmax,1.5 R/R max. (5%+0.1) hours on and 0.5 hours off Load life in Humidity 1000 hours, at rated continuous working voltage in R/R max. (5%+0.1) humidity 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 R/R max. (1%+0.05) PCB(FR4); bending : 2 mm, once for 10 seconds Pulling test : 500grams POE International Corp M01-00-E-07 Ver: 1 SPECIFICATION OF POWER CHIP RESISTOR Page: 7 of 7 PACKAGING Plastic Tape specifications (unit :mm) Symbol A B W F E Dimensions 5.500.20 2.800.20 12.000.30 5.500.1 1.750.10 Symbol P1 P0 D T Dimensions 4.000.10 4.000.10 1.50 +-00..10 Max. 1.2 Reel dimensions Symbol A B C D (unit : mm) 178.02.0 60.01.0 13.00.2 14.00.2 Taping quantity - Chip resistors 4,000 pcs per reel. - Production location in PDC- Tau Yuan within WTC Group.