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FR2256
Vitreous Enamelled Wirewound Resistors W20 Series • • • • • • • High stability and reliability High purity ceramic substrate High power dissipation for size Suitable for harsh environments Rugged all-welded construction Impervious lead free vitreous enamel coating Overload characteristics ideal for protection circuits Electrical Data 14.0 1 0.5 - 20K 2 1 - 60K 2 1 - 100K 2 100 88 -55 to 350 160 58 -55 to 350 200 44 -55 to 350 500 29 -55 to 350 750 22 -55 to 350 5 1 Operating Temperature Range (°C) 5 1 Thermal Impedance* (°C/watt) 5 0.2 - 100K W24 2 1 - 100K 10.0 0.5 - 15K 0.15 - 60K W23 1 Limiting Element Voltage (volts) 5 1 - 60K 7.0 2 0.1 - 20K W22 0.5 - 10K Typical: <+75 Maximum: +200 1 - 20K 5.0 1 0.1 - 15K W215 TCR (-55°C to 200°C) (±ppm/°C) 1 - 15K 3.0 Tolerance (±%) 0.1 - 10K W21 Power Rating @ 25°C (watts) Resistance Range (ohms) 1 - 10K IRC Type 5 Typical: <+75 Maximum: +200 Typical: <+75 Maximum: +200 Typical: <+75 Maximum: +200 Typical: <+75 Maximum: +200 *See temperature rise graph 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 W20 Series Issue December 2008 Sheet 1 of 4
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