General Purpose Surface Resistors Mounted Resistors General Purpose Surface Mounted Resistors General Purpose Surface WCR Series Mounted Resistors Excellent reliability WCR Series Welwyn Components Welwyn Components Wide range of sizes and ohmic values Excellent reliability WCR Series Wrap around terminations Wide range of sizes and ohmic values Inner electrode protection Excellent reliability Wrap around terminations Wide range of sizes and ohmic values Inner electrode protection Wrap around terminations Inner electrode protection AEC-Q200 grade available Electrical Data All parts are Pb-free and comply with EU Directive 2011/65/EU amended by (EU) 2015/863 (RoHS3) 0201 Electrical Data Power rating @ 70C 0402 0603 0805 1206 1210 2010 2512 0.1 0.125 0.25 0.5 1.0 0.05 0.25 0.063 watts Resistance range ohms 10R to 1M0 1R0 to 1M0 1R0 to 10M 0603 0805 1206 2010 2512 1210 0402 0201 150 25 50 75 Limiting element votage volts 200 0.1 0.125 0.25 0.5 1.0 0.05 0.063 Power ratingTCR* @ 70C watts 100 0.25 200 250 ppm/C Resistance range ohms 10R to 1M0 1R0 to 1M0 1R0 to 10M 1 Resistance Tolerance % 150 25 50 75 Limiting element votage volts 200 E24 or E96 Standard values 100 200 250 TCR* ppm/C -55 to 155 Ambient temperature range C 1 Resistance Tolerance % Zero-ohm Jumper Chip Rating amps 1.5 2 0.5 1 E24 or E96 Standard values <50 Zero-ohm Jumper Chip Resistance milliohms -55 to 155 Ambient temperature range C * Notes - TCR for low values 1R to 10R: -400 to +600ppm/C, 11R to 100R: 200ppm/C Zero-ohm Jumper Chip Rating amps 1.5 2 0.5 1 TCR for high values 3M3 to 10M: 300ppm/ <50 Zero-ohm Jumper Chip Resistance milliohms Physical Data Dimensions (mm) Physical Style DataL W 0.6 0.03 0.3 0.03 0201 Dimensions (mm) 1.0 0.1 0.5 0.05 0402 L T 1.6 W 0.1 Style 0.8 0.1 0603 0.6 0.03 0.03 2.00.3 0.15 0.03 1.25 0.23 0201 + 0.15 -0.1 0805 1.0 0.1 0.05 3.1 0.5 0.15 0.05 1.55 0.35 0402 + 0.15 -0.1 1206 1.6 0.1 0.45 0.1 3.1 0.8 0.1 0.1 0603 2.6 0.2 1210 2.0 0.15 0.55 0.1 5.0 + 0.15 0.1 -0.1 2.5 1.25 0805 0.2 2010 3.1 0.15 1.55 0.55 0.1 6.35+0.15 0.1 -0.1 3.2 1206 0.2 2512 3.1 0.1 0.55 0.1 2.6 0.2 1210 5.0 0.1 0.55 0.1 2.5 0.2 2010 Construction 6.35 0.1 0.55 0.1 3.2 0.2 2512 * Notes - TCR for low values 1R to 10R: -400 to +600ppm/C, 11R to 100R: 200ppm/C TCR for high values 3M3 to 10M: 300ppm/ T 0.23 0.03 0.35 0.05 0.45 C0.1 0.1 0.1 0.05 0.55 0.2 0.1 0.1 0.55 0.30.1 0.2 0.55 0.4 0.1 0.2 0.55 0.45 0.2 0.55 0.1 0.5 0.25 0.60 0.25 0.60 0.25 C 0.1 0.05 0.2 0.1 A 0.3 0.2 0.15 0.05 0.4 0.2 0.25 0.1 0.45 0.2 0.2 0.50.3 0.25 0.2 0.600.4 0.25 0.45 0.2 0.60 0.25 0.5 0.2 0.5 0.2 0.5 0.2 The chips have a high alumina substrate (96% minimum) with a ruthenium oxide resistance element and silver palladium, Figure 1 Construction nickel and tin plated terminations. A glazed protection coat The chips have a high alumina substrate (96% minimum) with is applied to the resistive element (See Fig.1) a ruthenium oxide resistance element and silver palladium, Terminations nickel and tin plated terminations. A glazed protection coat Solderability The terminations meet the requirements of is applied to the resistive element (See Fig.1) IEC 115-1, Clause 4.17.3.2. Terminations Strength The terminations meet requirements of Solderability The terminations meet the requirements of IEC 68.2.21. IEC 115-1, Clause 4.17.3.2. Strength A 0.15 0.05 0.25 0.1 0.3 0.2 0.4 0.2 0.45 0.2 0.5 0.2 A 0.5 0.2 0.5 0.2 Figure 1 C T L L A T Wrap-around terminations (3 faces) W A Tin Plating Nickel Barrier Dipped Conductor Tin Plating Epoxy Melamine Protection Nickel Barrier Glass Dielectric Silver Dipped Conductor Resistance Element Palladium Epoxy Melamine Protection Glass Dielectric Silver Resistance Element Palladium 96% min Alumina Substrate 96% min Alumina Substrate Welwyn Components reserves the right to make changes in product specification without notice or liability. All information is subject to Welwyn's own data and is considered accurate at time of going to print. General Note(c) Welwyn Components Limited * Bedlington, Northumberland NE22 7AA, UK General Note W Wrap-around terminations (3 faces) The terminations meet requirements of IEC 68.2.21. General Note C A A subsidiary of TT electronics plc BI Technologies IRC Welwyn Iss 07.03 Welwyn Components reserves the right to 822181 make in product notice or liability. Telephone: +44 (0) 1670 * Facsimile: +44 (0)specification 1670 829465 Email: info@welwyn-tt.com * Website: www.welwyn-tt.com TT Electronics reserves the right to make changes in changes product specification without noticewithout or* liability. All information is subject to Welwyn's own data and is considered accurate at time of going to print. All information is subject to TT Electronics' own data and is considered accurate at time of going to print. (c) Welwyn Components Limited * Bedlington, Northumberland NE22 7AA, UK (c) TT Electronics plc 822181 * Facsimile: +44 (0) 1670 829465 * Email: info@welwyn-tt.com * Website: www.welwyn-tt.com Telephone: +44 (0) 1670 A subsidiary of TT electronics plc www.ttelectronics.com/resistors Iss 07.03 11.18 General Purpose Surface GeneralResistors Purpose Surface Mounted Mounted Resistors WCR Series Welwyn Components WCR Series Table 1 Marking All resistors are individually marked with 3 digits. The first two digits are the significant figures and the third defines the number of added zeros. Jumpers are marked 000. Types 0201 and 0402 have no marking. Resistance value ohms 100R >100R, 10K >10K, 100K >100K, 1M0 >1M0 E96 1% components that can not be marked with 4 digits will be marked with a standard 3 digit code. Details can be supplied upon request. Noise dB -10 0 +15 +20 +30 Solvent Resistance The protective epoxy lacquer and marking are resistant to all normal industrial cleaning fluids suitable for printed circuits. Performance Data Maximum Change 0201 Load: 1000 hrs at 70C Shelf life: 12 months at room temp. 0402 0603 R% 10R-100K : 1 4R7-100K : 1 1R-100K : 1 R% 0805 1206 1210 2010 2512 1R-100K : 1 >100K : 2 1R-100K : 1 >100K : 2 1R-100K : 1 >100K : 2 3% + 0.1R 0.2 0.2 0.2 0.2 >100K : 2 >100K : 2 >100K : 2 1R-100K : 1 >100K : 2 0.2 0.2 0.2 0.2 zero @ 155 C Derate linearly to zero from 70C R% 2 2 2.5 2.5 2.5 2.5 2.5 5 Max voltage volts 50 100 100 200 400 400 400 400 Climatic R% 3 3 3 3 3 3 3 3 Short term overload (6.25 x rated power) Climatic Catagory Long term damp heat 55/125/56 1 R% Temperature rapid change R% 1 1 1 1 1 1 1 1 Resistance to solder heat R% 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 Vibration and bump R% 1 1 1 1 1 1 1 1 500 500 500 500 Noise see table 1 Insulation resistance ohms Voltage proof volts > 1G 100 300 500 Packaging Packaging All chips in 1210 size and smaller are tape mounted and supplied on standard 8mm paper tape, 2010 size on 12mm paper All chips are tape mounted and supplied on standard 8mm Resistor Labstock tape or plastic tape, and 2512 size on 12mm plastic tape reel, as Chip IEC publication 286-3. For Designers tape reel, as IEC publication 286-3. WCR chip resistors are available in a special package of the most 180mm (7 inch) reel is standard 180mm (7 inch) reel is standard carries 5,000 pieces. popular sizes containing 50 each of the E24 values. 250mm (10 inch) reel carrying double the standard quantity (Except 0402 carries 10,000 pieces) Please contact the sales desk for full details of this excellent can be supplied by agreement. Note: For zero ohm jumper chips use the dummy value & tolerance code R005J General Note BI Technologies IRC Welwyn TT Electronics reserves the right to make changes in product specification without notice or liability. All information subject TT Electronics' own data is considered time of going to print.* Website: www.welwyn-tt.com Telephone: +44is (0) 1670to822181 * Facsimile: +44 and (0) 1670 829465accurate * Email:atinfo@welwyn-tt.com (c) Welwyn Components Limited Bedlington, Northumberland NE22 7AA, UK Issue D * 01.11 07.03 www.ttelectronics.com/resistors (c) TT Electronics plc 11.18 General Purpose Surface Mounted Resistors WCR Series Ordering Procedure Ordering Procedure This product has two valid part numbers: European (Welwyn) Part Number: WCR1206-10KFI (1206, 10 kilohms 1%, Pb-free) W C R 1 2 1 0 6 - 1 0 2 K 3 1 2 3 4 Type Size Value1 Tolerance1 E24 = 3 characters E96 = 4 characters R = ohms K = kilohms M = megohms F = 1% WCR 0201 0402 0603 0805 1206 1210 2010 2512 F I 4 5 5 Grade / Packing I = Standard A = AEC-Q200 grade 2 Both grades use standard packing as follows: 0201 0402 0603, 0805, 1206, 1210 2010, 2512 20000/reel 10000/reel 5000/reel 4000/reel Note 1: For zero ohm jumper chips use the dummy value & tolerance code R005J Note 2: AEC-Q200 grade on resistor chips is not available in 0201 size. USA (IRC) Part Number: WCR-WCR1206LF-1002-F-P-LT W C R - W 1 R 1 2 2 21 Family Model WCR C WCR 0 6 L 3 3 4 Size 0201 0402 0603 0805 1206 1210 2010 2512 F - (1206, 10 kilohms 1%, Pb-free) 1 0 4 0 5 2 - F - P - 6 L T 7 5 6 7 Termination Value Tolerance Packing LF = Pb-free 3 digits + multiplier R = ohms for values <100 ohms F = 1% P-LT= Paper Tape 0201 20000/reel 0402 10000/reel 0603, 0805, 5000/reel 1206, 1210 2010 4000/reel E-LT = Plastic Tape 2512 4000/reel Note: For zero ohm jumper chips use value & tolerance code R000J General Note TT Electronics reserves the right to make changes in product specification without notice or liability. All information is subject to TT Electronics' own data and is considered accurate at time of going to print. BI Technologies IRC Welwyn www.ttelectronics.com/resistors (c) TT Electronics plc 11.18