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| General Purpose Power Wirewound Resistors PW Series Welwyn Components * 2 watts to 25 watts * 0.10 ohms to 30K ohms * 10% or 5% tolerance * TC's from 300 ppm/C to +5500 ppm/C Electrical Data PW-2 Power rating at 25C Resistance range over R range watts ohms 0.03%/C +0.55%/C +0.45%/C +0.25%/C 2 0R15 to 2K4 0.15 to 0.99 1.0 to 2.4K 0.1 to 30 0.24 to 130 1.0 to 10 PW-3 3 0R1 to 7K5 0.1 to 0.99 1.0 to 7.5K 0.1 to 86 0.1 to 270 0.24 to 20 PW-5 5 0R1 to 8K5 0.1 to 0.99 1.0 to 8.5K 0.1 to 68 0.1 to 300 0.27 to 22 PW-7 7 0R1 to 18K 0.1 to 0.99 1.0 to 18K 0.1 to 150 0.15 to 680 1.0 to 51 PW-10 10 0R18 to 30K 0.18 to 0.99 1.0 to 30K 0.1 to 240 1.0 to 82 PW-15 15 0R18 to 30K 0.18 to 0.99 1.0 to 30K 0.1 to 240 1.0 to 82 PW-18 18 0R18 to 22K 0.18 to 0.99 1.0 to 22K 0.1 to 200 1.0 to 70 PW-22 22 0R27 to 18K 0.27 to 1.3 1.5 to 12K 0.15 to 360 1.0 to 120 PW-25 25 0R27 to 18K 0.27 to 1.3 1.5 to 10K 0.15 to 300 1.5 to 100 Temperature coefficient 0.06%/C 0.24 to 1100 0.24 to 1100 0.24 to 1100 0.36 to 1800 0.36 to 1200 Please note: When ordering the alternative configuration please add an `A' after the part number. (i.e., PW-2A) Physical Data Dimensions (mm) L 0.8 PW-2 PW-3 PW-5 PW-7 PW-10 PW-15 PW-18 PW-22 PW-25 17.5 22.4 22.4 35.3 47.8 47.8 47.8 63.5 63.5 W 0.8 6.35 7.87 9.65 9.65 9.65 12.7 12.7 12.7 12.7 H 0.8 6.35 7.87 8.64 8.64 8.64 12.7 12.7 12.7 12.7 d dia. 0.8 0.91 0.91 0.91 0.91 0.91 0.91 1.0* 1.0* E 0.8 7.87 9.65 10.4 11.9 11.9 16.0 16.0 16.0 16.0 LL min. 36.6 36.6 38.1 38.1 38.1 38.1 38.1 38.1 38.1 F (ref.) 1.60 1.60 1.60 3.18 3.18 3.18 3.18 3.18 3.18 * Copper Clad Steel Standard Configuration d W H LL L 0.125 max. Alternate Configuration E F 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 111 General Purpose Power Wirewound Resistors PW Series Power Derating 100 Percent of Rated Load 80 PW-3, 5, 7, 10 60 PW-15, 18, 22, 25 40 20 0 25 40 85 300 PW-2 Temperature Rise (C) 250 200 150 100 50 0 0 20 40 60 80 100 120 Percent of Rated Load PW-22, 25 PW-15, 18 PW-10 PW-7 PW-5 PW-3 Welwyn Components Temperature Rise 0 50 100 150 200 Ambient Temperature (C) 250 Packaging Resistors are supplied bulk packed. Quantity 500. (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 112 Issue B * 03.02 General Purpose Power Wirewound Resistors PW Series Welwyn Components * 20 watts to 50 watts * 0.10 ohms to 2.0K ohms * 10% or 5% tolerance * Customs Electrical Data PW-20E Power rating at 25C Resistance range watts ohms 20 0R1 to 2K PW-30 30 0R5 to 1K2 PW-40 40 0R65 to 1K5 PW-50E 50 0R08 to 1K8 Please note: When ordering the alternative configuration please add an `A' after the part number. (i.e., PW-2A) Dimensions (Inches) A 0.030 PW-20E 1.875 PW-30 2.00 PW-40 2.45 PW-50E 3.075 PW-20E Wirewound B 0.060 2.50 2.55 3.00 3.625 0.250 (Typ.) 5/32 Dia. Thru (2) 0.0320.0025 PW-30, 40 and 50E Wirewound 5/32 Dia. Thru (2) A A 0.2820.020 0.0320.0025 0.1570.020 0.750.030 0.25 B 0.375 0.75 0.50.030 0.50.030 0.750.030 0.875 Power Derating 100 Percent of Rated Load 80 60 PW-20E, PW-30, PW-40 PW-50E without bracket 0.205 or 0.1870.005 0.1250.015 0.200 (Typ.) 40 20 0 0.0690.005 0.250.031 0.1350.015 0 50 100 150 200 Ambient Temperature (C) 250 PW-20E Alternate Terminal Configuration Printed Circuit Terminal With Bracket: PW-30 Increased to 40 watts PW-40 Increased to 50 watts PW-50 Increased to 60 watts PW-15E 0.5000.030 0.020 0.250 min. Temperature Rise 300 Temperature Rise (C) PW-50E 250 2.0000.040 1.4100.040 200 PW-20E 150 100 50 0 0 25 50 75 100 Percent of Rated Load 125 PW-30 PW-40 0.060 Dia. (2) 0.1870.010 1.050 Min. 0.8400.040 0.5000.030 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 113 General Purpose Power Wirewound Resistors PW Series Welwyn Components PW-30E 0.2500.020 Meniscus allowable to the termination edge 0.2050.020 1.1060.050 0.9000.050 0.3750.040 0.7090.030 0.062 Rad. (2) 0.125 Rad. (Ref.) 0.1550.005 0.5000.030 0.2730.010 Dia. 0.2900.030 0.6850.060 1.0000.040 3.0000.040 2.3750.040 0.3130.050 0.020 0.1870.020 0.020 0.5000.040 0.900 0.050 0.060 Dia. (2) See Meniscus Note Packaging Resistors are supplied bulk packed. Quantity 500. (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 114 Issue B * 03.02 |
Price & Availability of PW-10
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