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| Semi-Precision Power Wirewound Resistors PPW Series Welwyn Components * Ideal for pulse and surge applications * 2 watts to 15 watts * Resistance to 0R1 ohms to 5K ohms * 3%, 2% or 1% tolerance * 20 ppm/C TCR Electrical Data PPW-2 Power rating at 25C Resistance range watts 2 PPW-3 3 PPW-5 5 PPW-7 7 PPW-10 10 PPW-15 15 0R1 to 5K ohms 0R1 to 1K6 0R1 to 1K6 0R1 to 1K6 0R1 to 2K5 0R1 to 5K Please note: When ordering the alternate configuration please add an `A' after the part number (ie. PPW-3A) Lighting Surge Capabilities for PPW-2 Resistive range 1R to 9R9 10R to 29R9 30R to 99R 100R to 1K6 ohms 10 x 1000* 250V 500V 600V 1000V 10 x 360* 650V 850V 1000V 1500V 1000V 500V 1000 2000 3000 1000 Volts 10x360sec *10 microseconds - Maximum rise time to peak voltage. 360 or 1000 microseconds - minimum decay time to one half peak. 600V 300V 1000 2000 3000 600 Volts 10x1000sec General Note 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. A subsidiary of TT electronics plc Issue B * 03.02 (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 115 Semi-Precision Power Wirewound Resistors PPW Series Welwyn Components Physical Data Dimensions (mm) Standard Configuration d W H 25.4 min Type PPW-2 PPW-3 PPW-5 PPW-7 PPW-10 PPW-15 Alternate Configuration E L 3.17 max. L 0.8 1705 22.3 22.3 35.3 47.7 47.7 W 0.8 6.99 7.87 9.65 9.65 9.65 12.7 H 0.8 6.99 7.87 8.89 8.89 8.89 12.7 d dia. 0.8 0.8 0.8 0.8 0.8 0.8 E 0.8 8.134 9.65 10.4 11.9 11.9 12.7 Temperature Rise Hot Spot Temperature (C) 250 200 150 100 50 0 0 20 40 60 80 100 120 % Rated Load PPW-15 PPW-10 PPW-7 PPW-5 PPW-3 PPW-2 Power Derating 100 80 PPW-3, 5, 7, 10 % Rated Load 60 150 40 20 0 0 50 100 150 200 Ambient Temperature (C) 250 Max. Recommended Ambient Operating Temperature 150C 25 40 65 PPW-2 PPW-15 (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 116 Issue B * 03.02 |
Price & Availability of PPW
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