PW SERIES GENERAL PURPOSE AXIAL LEADED POWER WIREWOUND RESISTOR * * * * * Fireproof high temperature ceramic case - stand offs optional 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 Alloy resistance wire on fiberglass substrate Lead-/free, ROHS Compliant Construction Available SPECIFICATIONS: Power Rating @ 25C IRC Type PW-2 PW-3 PW-5 PW-7 PW-10 PW-15 PW-18 PW-22 PW-25 (watts) 2 3 5 7 10 15 18 22 25 Standard Resistance Automatically clamped termination lead assembly Standard Temperature Coefficient 0.06%/C Range (ohms) over R range 0.15 to 2.4K 0.15 to 0.99 0.1 to 7.5K 0.1 to 0.99 0.1 to 8.5K 0.1 to 0.99 0.1 to 18K 0.1 to 0.99 0.18 to 30K 0.18 to 0.99 0.18 to 30K 0.18 to 0.99 0.18 to 22K 0.18 to 0.99 0.27 to 18K 0.27 to 1.3 0.27 to 18K 0.27 to 1.3 Inorganic fireproof encapsulant Special Temperature Coefficients 0.03%/C over R range 1.0 to 2.4K 1.0 to 7.5K1.0 to 8.5K 1.0 to 18K 1.0 to 30K 1.0 to 30K 1.0 to 22K 1.5 to 12K 1.5 to 10K +0.55%/C +0.45%/C +0.25%/C over R range 0.1 to 30 0.1 to 86 0.1 to 68 0.1 to 150 0.1 to 240 0.1 to 240 0.1 to 200 0.15 to 360 0.15 to 300 over R range 0.24 to 130 0.1 to 270 0.1 to 300 0.15 to 680 0.24 to 1100 0.24 to 1100 0.24 to 1100 0.36 to 1800 0.36 to 1200 over R range 1.0 to 10 0.24 to 20 0.27 to 22 1.0 to 51 1.0 to 82 1.0 to 82 1.0 to 70 1.0 to 120 1.5 to 100 E0.03 (0.8) 0.31 (7.87) 0.38 (9.65) 0.41 (10.4) 0.47 (11.9) 0.47 (11.9) 0.63 (16.0) 0.63 (16.0) 0.63 (16.0) 0.63 (16.0) LL min. 1.44 (36.6) 1.44 (36.6) 1.50 (38.1) 1.50 (38.1) 1.50 (38.1) 1.50 (38.1) 1.50 (38.1) 1.50 (38.1) 1.50 (38.1) F (ref.) 0.063 0.063 0.063 0.125 0.125 0.125 0.125 0.125 0.125 Please note: When ordering the alternate configuration please add an 'A' after the part number. (i.e., PW-2A) PW DIMENSIONS IRC Type PW-2 PW-3 PW-5 PW-7 PW-10 PW-15 PW-18 PW-22 PW-25 (Inches and (mm)): L0.03 (0.8) W0.03 (0.8) 0.69 (17.5) 0.25 (6.35) 0.88 (22.4) 0.31 (7.87) 0.88 (22.4) 0.38 (9.65) 1.39 (35.3) 0.38 (9.65) 1.88 (47.8) 0.38 (9.65) 1.88 (47.8) 0.50 (12.7) 1.88 (47.8) 0.50 (12.7) 2.50 (63.5) 0.50 (12.7) 0.50 (12.7) 2.50 (63.5) H0.03 (0.8) 0.25 (6.35) 0.31 (7.87) 0.35(8.89) 0.35(8.89) 0.35(8.89) 0.50 (12.7) 0.50 (12.7) 0.50 (12.7) 0.50 (12.7) *Copper Clad Steel D Dia.0.002 0.032 (0.8) 0.036 (0.91) 0.036 (0.91) 0.036 (0.91) 0.036 (0.91) 0.036 (0.91) 0.036 (0.91) 0.040 (1.0)* 0.040 (1.0)* Alternate Configuration Standard TEMPERATURE RISE: Percent of Rated Load Temperature Rise (C) POWER DERATING: Ambient Temperature (C) Percent of Rated Load General Note IRC reserves the right to make changes in product specification without notice or liability. All information is subject to IRC's own data and is considered accurate at time of going to print. WIREWOUND AND FILM TECHNOLOGIES DIVISION 736 Greenway Road * Boone, North Carolina 28607-1860 * Tel: 828-264-8861 * Fax: 828-264-8866 * www.irctt.com A subsidiary of TT elec Issue Preliminary PW SERIES GENERAL PURPOSE RADIAL TERMINAL POWER WIREWOUND RESISTOR * * * * * Inorganic fireproof encapsulant 20 watts to 50 watts 0.10 ohms to 2.0K ohms 10% or 5% tolerance Custom parts available - consult factory RoHS-compliant version available Tinned steel Steatite ceramic case Allow resistance wire on fiberglass substrate SPECIFICATIONS: (watts) 20 30 40 50 (ohms) 0.1 - 2.0K 0.5 - 1.2K 0.65 - 1.5K 0.08 - 1.8K Percent of Rated Load Resistance Range POWER DERATING: (without bracket) Temperature Rise (C) IRC Type PW-20E PW-30 PW-40 PW-50E TEMPERATURE RISE at Power at 25C - Flameproof inorganic construction - EIA RS-344, Insulated fixed Ambient Temperature (C) wirewound resistors With Bracket: PW-30 Increased to 40 watts PW-40 Increased to 50 watts PW-50 Increased to 60 watts Percent of Rated Load - 1000 hour load life at 25C: 5% max. - Moisture no load 240 hours: 2% max. - Temperature cycling (5 cyc.): 5% max. DIMENSIONS (Inches): PW-20E Wirewound PW-30, 40 and 50E Wirewound 5/32 Dia. Thru (2) 0.250 (Typ.) A A 0.0320.0025 0.1570.020 0.0320.0025 0.2820.020 5/32 Dia. Thru (2) 0.750.030 0.50.030 0.25 B 0.750.030 0.375 0.875 0.50.030 PW-20E Alternate Terminal Configuration - 0.020" Tin coated Steel IRC Type PW-20E PW-30 PW-40 PW-50E 0.75 B 7/32 Dia. 0.205 or 0.1870.005 0.250.031 0.0690.005 0.1250.015 0.200 (Typ.) 0.1350.015 Printed Circuit Terminal A (0.030) 1.875 2.00 2.45 3.075 B (0.060) 2.50 2.55 3.00 3.625 General Note IRC reserves the right to make changes in product specification without notice or liability. All information is subject to IRC's own data and is considered accurate at time of going to print. WIREWOUND AND FILM TECHNOLOGIES DIVISION 736 Greenway Road * Boone, North Carolina 28607-1860 * Tel: 828-264-8861 * Fax: 828-264-8866 * www.irctt.com A subsidiary of TT elec Issue Preliminary HOW TO ORDER: Sample Part No. PW 18 12K 10% LF IRC Type Power 18 = 18watts Resistance Value (standard EIA values) Tolerance 10 or 5% standard Lead Free Construction General Note IRC reserves the right to make changes in product specification without notice or liability. All information is subject to IRC's own data and is considered accurate at time of going to print. WIREWOUND AND FILM TECHNOLOGIES DIVISION A subsidiary of TT electronics plc 736 Greenway Road * Boone, North Carolina 28607-1860 * Tel: 828-264-8861 * Fax: 828-264-8866 * www.irctt.com