POE International Corp SPECIFICATION OF POWER CHIP RESISTOR M01-00-E-07 Ver: 1 Page: 1 of 7 ROHS compliance WF25P 1%, 5% Power chip resistors Size 2512 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. 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 (lead 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. WF25P Size code 2512 ( 6432 ) 5% (E24); 1% (E24+E96) Resistance Tolerance Resistance Range 1 ~ 10M, Jumper (0) Rn < 1M 100 ppm/C FOR F tol. 10 Rn < 1M 200 ppm/C FOR J tol. TCR (ppm/C) 1 Max. dissipation at Tamb=70C 2W Max. Operation Voltage (DC or RMS) 300V Max. Overload Voltage (DC or RMS) 600V 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 x Resistance Value or Max. RCWV listed above, whichever is lower. 3. The resistance of Jumper is defined <0.05, Imax. = 0.8A. MECHANICAL DATA Symbol Dimensions (mm) L 6.400.20 W 3.200.20 T 0.600.10 Tt 0.650.25 Tb 0.900.25 MASS ( per 100pcs ) : 4.25 gram 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 POE International Corp SPECIFICATION OF 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 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 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 POWER CHIP RESISTOR Page: 5 of 7 CATALOGUE NUMBERS The resistors have a catalogue number starting with : WR25 X 472_ J T _ Size code Type code Resistance code Tolerance Packaging code Termination code WF25 : 2512 P : Power E24 : 2 significant digits followed by no. of zeros and a blank J : 5% T : 7" Reel taping _ = SnPb base ("_" means a blank) 4.7 =4R7_ 10 =100_ 220 =221_ Jumper =000_ F : 1% L = Sn base (lead free) P : Jumper ("_" means a blank) E96 : 3 significant digits followed by no. of zeros 102 =1020 37.4K =3742 TEST AND REQUIREMENTS Essentially all tests are carried out according to the schedule of IEC publication 115-8, category LCT/UCT/56 (rated temperature range : Lower Category Temperature, Upper Category Temperature; damp heat, long term, 56 days). The testing also meets the requirements specified by EIA, EIAJ and JIS. The tests are carried out in accordance with IEC publication 68, "Recommended basic climatic and mechanical robustness testing procedure for electronic components" and under standard atmospheric conditions according to IEC 60068-1, subclause 5.3. Unless otherwise specified, the following value supplied : Temperature: 15C to 35C. Relative humidity: 45% to 75%. Air pressure: 86kPa to 106 kPa (860 mbar to 1060 mbar). All soldering tests are performed with midly activated flux. 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, <1K@1.0V, <1M@25V, Natural resistance change per change in degree Test temperature -55 ~ +155C centigrade. 1 Rn < 9.76, 300 ppm/C R2 - R1 x 106 R1 (t2 - t1 ) (ppm/C) R1 : Resistance at reference temperature R2 : Resistance at test temperature t1 : 25C 10 Rn < 1M, 1M Rn < 10M, 200 ppm/C 300 ppm/C POE International Corp SPECIFICATION OF POWER CHIP RESISTOR TEST PROCEDURE M01-00-E-07 Ver: 1 Page: 6 of 7 REQUIREMENT Short time overload ( STOL ) Permanent resistance change after a 5second application of a R/R max. (2%+0.1) voltage 5 times RCWV or the maximum overload voltage specified in the above list, whichever is less. Resistance to soldering heat Unmounted chips 101 seconds, 2705C 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. (1%+0.05) 3. 30 minutes at +1553C, 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 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. (3%+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%+0.05) 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 6.900.20 3.600.20 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.