Semi-Precision Power Semi-Precision Power Semi-Precision Power Wirewound Resistors Wirewound Resistors Wirewound Resistors Welwyn Components Welwyn Components PPW PPW SeriesSeries PPW Series Ideal for pulse surge applications * Ideal forand pulse surge * Ideal for pulse andand surge 2 watts to 15 watts applications applications Resistance toto 0R1 15ohms wattsto 5K ohms * 2 watts watts to 15 watts * 23%, 2% or 1% tolerance to 0R1 ohms to 5K ohms * Resistance to 0R1 ohms to 5K ohms * Resistance 20 ppm/C TCR 3%, 2% or 1% tolerance * * 3%, 2% or 1% tolerance 20 ppm/C TCR * 20* ppm/C TCR * * * * * Electrical Data Electrical Data Power rating at 25C Power rating at 25C Resistance range Resistance range PPW-2 PPW-3 PPW-5 PPW-7 PPW-10 PPW-15 PPW-2 PPW-3 PPW-5 PPW-7 PPW-10 PPW-15 watts 2 3 5 7 10 15 watts 2 3 5 7 10 15 ohms 0R1 to 1K6 0R1 to 1K6 0R1 to 1K6 0R1 to 2K5 0R1 to 5K 0R1 to 5K ohms 0R1 to 1K6 0R1 to 1K6 0R1 to 1K6 0R1 to 2K5 0R1 to 5K 0R1 to 5K Please note: When ordering the alternate configuration please add an `A' after the part number (ie. PPW-3A) Please note: When ordering the alternate configuration please add an `A' after the part number (ie. PPW-3A) Lighting Surge Capabilities PPW-2 Lighting Surge Capabilities for for PPW-2 Resistive range Resistive range 1R to 9R9 1R to 9R9 10R to 29R9 10R to 29R9 30R to 99R 30R to 99R 100R to 1K6 100R to 1K6 1000V 1000V 500V 500V ohms ohms 10 x 1000* 10 x 1000* 250V 250V 500V 500V 600V 600V 1000V 1000V 10 x 360* 10 x 360* 650V 650V 850V 850V 1000V 1000V 1500V 1500V 600V 600V 300V 300V 1000 2000 3000 1000 3000 10002000 Volts 10x360sec 1000 Volts 10x360sec 1000 2000 3000 1000 3000 600 2000 Volts 10x1000sec 600 Volts 10x1000sec *10 microseconds - Maximum rise time to peak voltage. *10 microseconds Maximum rise time to peak voltage. 360 or 1000 -microseconds - minimum decay time to one half peak. 360 or 1000 microseconds - minimum decay time to one half peak. General Note General Note Welwyn General NoteComponents reserves the right to make changes in product specification without notice or liability. Welwyn Components reserves the right to make changes in product specification without notice or liability. A subsidiary of All information is subject to Welwyn's own data and is considered accurate at time of going to print. TT reserves theto right to make changes in product specification without notice or liability. A subsidiary of Allelectronics information is subject Welwyn's own data and is considered accurate at time of going to print. TT electronics plc All information is subjectComponents to TT electronics' Limited own data and is considered accurate at time of 7AA, goingUK to print. TT electronics plc (c) Welwyn * Bedlington, Northumberland NE22 www.bitechnologies.com www.irctt.com www.welwyn-tt.com (c) Welwyn Components Bedlington, NE22 7AA,info@welwyn-tt.com UK Issue B * 03.02 Telephone: +44 (0) 1670Limited 822181 * *Facsimile: +44Northumberland (0) 1670 829465 * Email: * Website: www.welwyn-tt.com Issue B * 03.02 Telephone: +44 (0) 1670 (c) TT electronics plc822181 * Facsimile: +44 (0) 1670 829465 * Email: info@welwyn-tt.com * Website: www.welwyn-tt.com 11. 11 115 115 Semi-Precision Power Semi-Precision Power Wirewound Resistors Wirewound Resistors PPW Series Welwyn Components PPW Series Physical Data Dimensions (mm) Standard Configuration Alternate Configuration W d E H 25.4 min L Type 3.17 max. L 0.8 W 0.8 H 0.8 d dia. E 0.8 PPW-2 1705 6.99 6.99 0.8 8.134 PPW-3 22.3 7.87 7.87 0.8 9.65 PPW-5 22.3 9.65 8.89 0.8 10.4 PPW-7 35.3 9.65 8.89 0.8 11.9 PPW-10 47.7 9.65 8.89 0.8 11.9 PPW-15 47.7 12.7 12.7 0.8 12.7 Power Derating 250 PPW-15 100 200 PPW-10 80 150 PPW-7 PPW-5 PPW-3 60 100 PPW-2 50 0 0 20 40 60 80 100 % Rated Load Hot Spot Temperature (C) Temperature Rise % Rated Load 65 PPW-2 PPW-3, 5, 7, 10 PPW-15 150 40 Max. Recommended Ambient Operating Temperature 150C 20 0 120 25 40 0 50 100 150 200 Ambient Temperature (C) 250 Ordering Procedure Example: PPW5 at 110 ohms and 1% tolerance in bulk pack - PPW5- 110RFI Type Configuration A Standard Alternate Value (use IEC62 code) Tolerance (use IEC62 code) F G 1% 2% H 3% Note: 1 & 3% preferred Packing I Bulk Standard (c) Welwyn Components Limited Bedlington, Northumberland NE22 7AA, UK Telephone: +44 (0) 1670 822181 * Facsimile: +44 (0) 1670 829465 * Email: info@welwyn-tt.com * Website: www.welwyn-tt.com General Note 116 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. Issue B * 03.02 www.bitechnologies.com www.irctt.com www.welwyn-tt.com (c) TT electronics plc 11. 11