WK25V_J WALSIN | Alldatasheet
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Technical content
Page 1 of 8 ASC_WKxxV_J_AUTO_V01 DEC - 2013 WK25V, W K20V, WK12V, WK08V, WK06V Thick Film High Voltage Chip Resistors Automotive Grade AEC Q200 Compliant Size 2512,2010,1206, 0805, 0603 *Contents in this sheet are subject to change without prior notice.
Page 2 of 8 ASC_WKxxV_J_AUTO_V01 DEC - 2013 FEATURE 1. Special material and design for high working voltage require. 2. Compatible with flow and reflow soldering 3. Suitable for lead free soldering. 4. High limiting voltage 5. Automotive AEC Q200 compliant APPLICATION
- Power supply
- Automotive industry
- Measurement instrument
- Back light inverter
- Medical or 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 Tin (lead free) alloy. Fig 1. Construction of Chip-R
Page 3 of 8 ASC_WKxxV_J_AUTO_V01 DEC - 2013 QUICK REFERENCE DATA Item General Specification Series No. WK25V WK 20V WK12V WK08V WK06V Size code 2512(6432 ) 2010 ( 5025 ) 1206 ( 3216 ) 08 05 ( 2012 ) 0603 (1608) Resistance Range ±5%: 47 Ω ~ 51 M Ω ( E24) 47 Ω ~10 M Ω TCR (ppm/ °C) +500~ -200 ±200 ±100 47 Ω ~ 97.6 Ω 100 Ω ~ 549 Ω 560 Ω ~ 51MΩ 47 Ω ~ 464 Ω 470Ω ~ 51MΩ 47 Ω ~ 97.6 Ω 100 Ω ~ 51M Ω 47 Ω ~ 97.6 Ω 100 Ω ~ 51M Ω 47 Ω ~ 464 Ω 470Ω ~ 10MΩ Max. Dissipation at T amb =70 °C 1 W 1/2 W 1/4 W 1/8 W 1/10W Max. Operation Voltage (DC or RMS) 800V 500V 500V 400V 200V Max. Overload Voltage (DC or RMS) 1600V 1000V 1000V 800V 400V 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 Value Resistance Power Rated RCWV ×= or Max. RCWV listed above, whichever is lower. MECHANICAL DATA (unit : mm) Symbol WK25V WK20V WK12V WK08V WK06V 1 0 5
Page 4 of 8 ASC_WKxxV_J_AUTO_V01 DEC - 2013 MARKING For E24 series, Each resistor is marked with a three–digit code on the protective coating to designate the nominal resistance value. For E96 series, Each resistor is marked with a four–digit code on the protective coating to designate the nominal resistance value. WK06V E96 has no marking! Example: 105 = 1M Ω FUNCTIONAL DESCRIPTION Product characterization Standard values of nominal resistance are taken from the E24/E96 series for resistors with a tolerance of ±1%, ±5%. 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 Figure 2 Maximum dissipation in percentage of rated power as a function of the ambient temperature MOUNTING 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. 105
Page 5 of 8 ASC_WKxxV_J_AUTO_V01 DEC - 2013 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 Fig 3. Fig 3. Infrared soldering profile CATALOGUE NUMBERS The resistors have a catalogue number starting with . WK25 V 105 J T L J Size code WK25 : 2512 WK20 : 2010 WK12 : 1206 WK08 : 0805 WK06 : 0603 Type code V :High Voltage Resistance code 5%, E24: 2 significant digits followed by no. of zeros 100 Ω = 101_ 10K Ω = 103 1%, E24+E96: 3 significant digits followed by no. of zeros 100Ω =1000 37.4K Ω =3742 Tolerance J : ±5% G : ±2% F : ±1% Packaging code T : 7” inch reel 1206:paper tape, 5kpcs/reel 2010,2512 :plastic tape, 4kpcs/reel Termination code L = Sn base (lead free) Special code J = Automotive grade AEC Q200 compliant Tape packaging WK12, WK08, WK06 : 8mm width paper taping 5,000pcs per reel. WK25 ；WK20: 12mm width plastic taping 4,000pcs per reel. Marking code : For E24 series , 3 digit marking code for J tol.. E96 series, 4 digit marking code for F tol.
Page 6 of 8 ASC_WKxxV_J_AUTO_V01 DEC - 2013 TEST AND REQUIREMENTS – refer to AEC Q200 test standard
Page 7 of 8 ASC_WKxxV_J_AUTO_V01 DEC - 2013 0603: 600V, 0805: 1500V 1206/2010/2512: 300 0V 0603: 10N, 0805/1206/2010/2512: 17.7N, time: 60sec
Page 8 of 8 ASC_WKxxV_J_AUTO_V01 DEC - 2013 PACKAGING Tape specifications (unit :mm) Series No. A B W F E WK25V 6.90 ±0.20 3.60 ±0.20 WK20V 5.50 ±0.20 3.10 ±0.20 Series No. P1 P0 Φ D T WK25V WK20V 1.1 ±0.15 WK12V WK08V Max. 1.0 WK06V 0 . 050 . 1+ Φ Max. 0.8 Reel dimensions (unit : mm) Reel / Tape A B C D 7” reel for 12mm tape 13+1/0 7” reel for 8mm tape 9+1/0