General Purpose Power Metal Glaze™ Resistor Fireproof high temperature ceramic case with stand-off PWRG Series • 3 and 5 watts • 1Ω to 1MΩ range Inorganic fireproof encapsulant • TC’s from +100 ppm/°C • Radial leads for PC mount Metal Glaze™ thick film resistive element Specifications - Power Rating: 3 and 5 watts - Resistance Range: 1Ω to 1MΩ -Tolerance: ±1%, ±2%, ±5%, and ±10%, - Flameproof inorganic construction Physical Data A B C Meniscus permitted to bottom of feet 0.080 ±0.032 LD 0.170 ±0.062 E D Dimensions (Inches and (mm)) IRC Type PWRG-3 PWRG-5 A B C D E LD 0.475 ±0.030 0.320 ±0.030 1.00 ±0.030 0.200 ±0.062 0.175 ±0.062 0.032 ±0.002 (12.0 ±0.8) (8.1 ±0.8) (25.4 ±0.8) (5.08 ±1.6) (4.44 ±1.6) (1.02 ±0.05) 0.500 ±0.030 0.350 ±0.030 1.00 ±0.030 0.200 ±0.062 0.175 ±0.062 0.032 ±0.002 (12.7 ±0.8) (8.8 ±0.8) (25.4 ±0.8) (5.08 ±1.6) (4.44 ±1.6) (1.02 ±0.05) 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. Wire and Film Technologies Division • 4222 South Staples Street • Corpus Christi Texas 78411 USA Telephone: 361 992 7900 • Facsimile: 361 992 3377 • Website: www.irctt.com A subsidiary of TT electronics plc PWRG Series Issue November 2008 Sheet 1 of 2 General Purpose Power Metal Glaze™ Resistor Power Derating Curve Temperature Rise Chart 200 PWRG - 3, 5 100 0 85 100 0 20 40 60 80 100 120 Hot Spot Temperature (°C) Hot Spot Temperature (°C) 300 PWRG - 3, 5 80 60 40 20 Rated Power (%) 0 0 50 100 150 Rated Power (%) 200 250 Ordering Data Sample Part No. PWRG 5 1202 K IRC Type PWRG Power Resistance Range Tolerance J = ±5%, K = ±10% Wire and Film Technologies Division • 4222 South Staples Street • Corpus Christi Texas 78411 USA Telephone: 361 992 7900 • Facsimile: 361 992 3377 • Website: www.irctt.com PWRG Series Issue November 2008 Sheet 2 of 2