Resistors Chip Resistor Arrays Chip Resistor Arrays Welwyn Components WNCR Series WNCR Seriesplacement cost * Reduced * * * Compact size Reduced placement cost Compact sizealso available Zero ohms Zero ohms also available Design flexibility Design flexibility NOT RECOMMENDED FOR NEW DESIGNS (BCN is preferred) All parts are Pb-free and comply with EU Directive 2011/65/EU amended by (EU) 2015/863 (RoHS3) Electrical Data WNCR Power rating per resistor at 70C Resistance range (E24) TCR -55 to 125C watts 0.063 ohms 10 to 1M ppm/C Resistance tolerance 200 % 5 Maximum overload voltage volts 100 Maximum working overload volts Ambient temperature range C 50 -55 to +125 Physical Data Dimensions (mm) W a b c d p t 3.20 1.60 0.50 0.5 0.35 0.40 0.8 0.45 0.15 0.15 0.15 0.15 0.15 L W a b c d p t 3.20 1.60 0.60 0.40 0.25 0.30 0.8 0.50 0.10 0.10 0.15 0.15 0.15 0.20 WNCR 164 Concave L P t L Type c d c d W 0.10 a b Terminations Type WNCR 168 Convex 0.10 p d c d c W a Terminations b t L Schematic 8 Solderability 5 At least 95% of the terminal area shall be covered by continuous smooth new solder. Marking 1 4 Construction Substrate Resistor Terminations Alumina Ruthenium Oxide Nickel & solder plated Normal resistance value is marked on the top of the resistor with three digits. The first two digits are significant of the nominal value and the third digit is the multiplier. General GeneralNote Note Welwyn Components reserves right to make changesspecification in product without specification notice or liability. TT Electronics reserves the right tothe make changes in product noticewithout or liability. Allinformation informationisissubject subject own accurateatattime timeofofgoing going print. All to to TTWelwyn's Electronics' owndata dataand andisis considered considered accurate to to print. BI Technologies IRC Welwyn (c) Welwyn Components Limited * Bedlington, Northumberland NE22 7AA, UK (c) TT Electronics Telephone: +44 (0) plc 1670 822181 * Facsimile: +44 (0) 1670 829465 * Email: info@welwyn-tt.com * Website: www.welwyn-tt.com 80 A subsidiary of TT electronics plc www.ttelectronics.com/resistors Issue B * 03.02 06.18 Chip Resistor Chip Resistor Arrays Chip ChipResistor Resistor Arrays WNCR Series Arrays Arrays Welwyn Components Welwyn Components WNCR Series WNCR Series WNCR Series Welwyn Components NOT RECOMMENDED FOR NEW DESIGNS Performance Data Performance Data Performance Data Short term overload Typical Performance R% 2.5 Typical Performance 2.0 Typical Performance 2.5 0 2.5 2.0 3.0 2 2.0 3.0 2 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 R% R% R% R% R% R% R% R% R% R% R% R% R% R% R% R% R% Resistance to solder heat Short term overload Temperature cycling Short term overload Resistance to solder heat Moisture load life: 1000 Resistance to solder heathrs at 40C Temperature cycling Load life: 1000 hrs at 70C Temperature cycling Moisture load life: 1000 hrs at 40C Low temperature hrs at -55C Moisture load life:exposure: 1000 hrs 1000 at 40C Load life: 1000 hrs at 70C High temperature Load life: 1000 hrsexposure: at 70C 1000 hrs at 125C Low temperature exposure: 1000 hrs at -55C Humidity exposure: 1000 hrs1000 at 40C Low temperature exposure: hrs at -55C High temperature exposure: 1000 hrs at 125C High temperature exposure: 1000 hrs at 125C Humidity exposure: 1000 hrs at 40C Humidity exposure: 1000 hrs at 40C Power Rating For ambient temperature above 70C, the power shall be derated as follows: Power Rating Power Rating For ambient temperature above 70C, the power shall be derated as follows: For ambient temperature above 70C, the power shall be derated as follows: Percent of Rated Wattage Percent of (%) Percent of Rated Wattage Rated (%) Wattage (%) Ambient Temperature (oC) 1/16 watt / resistor at 70oC Ambient Temperature (oC) Ambient (oC) oC 1/16 wattTemperature / resistor at 70 1/16 watt / resistor at 70oC Packaging Ordering Procedure E xample: WNCR with concave terminations at Ordering Procedure Ordering Procedure 4.7 kilohms and 5% tolerance on a reel of 5000 pieces Taping Characteristics (mm) Packaging Packaging Taping Characteristics (mm) Taping Characteristics (mm) 8 . 08.00.30 . 38 . 0 0 . 3 1 . 7 5 0 . 1 2 . 0 0 . 0 5 4 . 0 0 . 1 O1.5 +0.1 -0 2 . 0 0 . 0 5 4 . 0 0 . 1 2 . 0 0 . 0 5 4 . 0 0 . 1 +0.1 O1.5 -0 O1.5 +0.1 -0 1 . 7 5 0 . 1 3 . 5 0 . 0 5 1 . 7 5 0 . 1 Example: WNCR with concave terminations at Example: WNCR with concave terminations at 4.7 kilohms and 5% tolerance 6 4of- 5000 4 K 7pieces JI W N on C Ra 1reel 4.7 kilohms and 5% tolerance on a reel of 5000 pieces Type WNCR164- 4K7JI WNCR164- 4K7JI Type Terminations Type B 2.75 3 . 5 0 . 0 5 B 3 . 5 0 . 0 5 2.75 2.75 WNCR WNCR WNCR Packaging A 4 . 0 0 . 1 2 . 0 0 . 0 5 4 . 0 0 . 1 2 . 0 0 . 0 5 4 . 0 0 . 1 2 . 0 0 . 0 5 B t A t A t A t B 2.0 +0.1 A -0.15 A 2.0 +0.1 2.0 +0.1 -0.15 -0.15 0.8 t 0.2 t 0.8 0.8 0.2 0.2 3.75 +0.1 B -0.15 B 3.75 +0.1 3.75 +0.1 -0.15 -0.15 Resistor arrays are supplied tape and reel. Packaging Quantity 5,000 pcs per reel. Packaging Resistor arrays are supplied tape and reel. Resistor Quantityarrays 5,000are pcssupplied per reel.tape and reel. Quantity 5,000 pcs per reel. General Note (c) Welwyn Components Limited Bedlington, Northumberland NE22 7AA, UK 164 Concave Terminations 168 Convex Terminations 164 Concave 164 Concave 168 Convex Value (use IEC62 code) 168 Convex Value (use(use IEC62 code) Tolerance IEC62 code) Value (use IEC62 code) J 5% Tolerance (use IEC62 code) Tolerance (use IEC62 code) J 5% Packing J 5% I Tape 5000/reel Standard I Tape 5000/reel 5000/reel Standard Standard Packing Packing I Tape BI Technologies IRC Welwyn TT Electronics reserves the right to make changes+44 in product specification notice or liability. Telephone: +44 (0) 1670 822181 * Facsimile: (0) 1670 829465 * without Email: info@welwyn-tt.com * Website: www.welwyn-tt.com All information subject to TT Electronics' own Bedlington, data and is considered accurateNE22 at time of going (c) Welwyn isComponents Limited Northumberland 7AA, UK to print. Telephone: +44Components (0) 1670 822181Limited * Facsimile:Bedlington, +44 (0) 1670 829465 * Email: info@welwyn-tt.com * Website: www.welwyn-tt.com (c) Welwyn Northumberland NE22 7AA, UK Telephone: +44 (0) 1670 (c) TT Electronics plc 822181 * Facsimile: +44 (0) 1670 829465 * Email: info@welwyn-tt.com * Website: www.welwyn-tt.com Issue B * 03.02 www.ttelectronics.com/resistors Issue B * 03.02 Issue B * 03.02 06.18 81 81 81