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| 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 IRC Type Power Rating @ 25C (watts) Resistance Range (ohms) 1 - 10K W21 3.0 0.5 - 10K 0.1 - 10K 1 - 15K W215 5.0 0.5 - 15K 0.1 - 15K 1 - 20K W22 7.0 0.5 - 20K 0.1 - 20K 1 - 60K W23 10.0 1 - 60K 0.15 - 60K 1 - 100K W24 14.0 1 - 100K 0.2 - 100K *See temperature rise graph Tolerance (%) 1 2 5 1 2 5 1 2 5 1 2 5 1 2 5 TCR (-55C to 200C) (ppm/C) Typical: <+75 Maximum: +200 Limiting Element Voltage (volts) Thermal Impedance* (C/watt) Operating Temperature Range (C) 100 88 -55 to 350 Typical: <+75 Maximum: +200 160 58 -55 to 350 Typical: <+75 Maximum: +200 200 44 -55 to 350 Typical: <+75 Maximum: +200 500 29 -55 to 350 Typical: <+75 Maximum: +200 750 22 -55 to 350 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 Vitreous Enamelled Wirewound Resistors Physical Data d dia. D L f Dimensions (mm) and Weight (g) IRC Type W21 W215 W22 W23 W24 L max 12.7 22.0 22.2 38.0 53.5 D max 5.6 7.0 8.0 8.0 8.0 f min 22.75 23.1 23.1 ----d nom 0.8 0.8 0.8 0.8 0.8 Wt. nom 1 2 2 3.5 5 CONSTRUCTION A high purity ceramic substrate is assembled with interference fit end caps to which are welded the termination wires. The resistive element is wound on the substrate and welded to the caps; the vitreous enamel protective coating is then applied. TERMINATIONS Material: Copper clad steel wire, nickel plated and solder-coated. Length: W23's and W24's are not supplied on tape. Minimum length is 30mm. MARKING The resistors are legend marked with type reference, resistance value and tolerance. SOLVENT RESISTANCE The body protection and marking are resistant to all normal industrial cleaning solvents suitable for printed circuits. 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 W20 Series Issue December 2008 Sheet 2 of 4 Vitreous Enamelled Wirewound Resistors Temperature Rise Curve 400 W22 W215 W22 W23 W24 Temperature Rise (C) 300 200 100 0 5 10 15 Dissipation (watts) 20 Environmental Data Test Load at Commercial Rating: 1000 Hours @ room temperature Dry Heat: 1000 hours @ 200C Shelf Life: 12 months at room temperature Short Term Overload Climatic Long Term Damp Heat Temperature Rapid Change Resistance to Solder Heat Vibration and Bump Noise (In a Decade of Frequency) Robustness Insulation Resistance Voltage Proof R% R% R% R% R% R% R% R% R% V/V R% ohms volts Actual Performance Maximum 5 2 0.03 .47 0.5 0.05 0.5 0.25 0.25 zero 0.4 >1 G ohm 500 min Typical 3.5 1 0.02 0.1 0.2 0.02 0.2 0.03 0.05 zero 0.05 >1 G ohm 500 min APPLICATION NOTES The terminations should not be bent closer than 1.6mm from the body, and the recommended minimum bend radius is 1.2 mm. Terminations are solderable to within 4mm from the body. When cold, vitreous enamel has excellent insulation resistance. In common with all insulations the specific resistance of the enamel decreases with increase in temperature. Therefore, resistors operated at near maximum temperature cannot be classed as insulated and should not be used in contact with any conducting material. Care must be taken when determining clearance distance between the resistor body and printed circuit board or other components to ensure these are not overheated. Resistance is measured 6mm from the resistor body. 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 W20 Series Issue December 2008 Sheet 3 of 4 Vitreous Enamelled Wirewound Resistors Packaging For W21, W215, and W22 resistors the standard method of packaging is taped in ammo packs. Alternatives available by special request are: - Taped and reeled - Loose packed in boxes (minimum lead length 30mm). W23's and W24's are available only as loose packed in boxes. 6 f1 b 6 f2 10 0.5 Type W21 W215 W22 Body location: f1 - f2 1.4mm A 63 2 73 2 73 2 Standard Quantities Per Package Type Ammo Pack Reel Small Box Large Box Code A R SB LB W21 1000 1000 200 800 W215 600 800 100 500 W22 500 700 100 300 W23 ----50 --W24 ----25 --- Ordering Data Specify type, reference, etc. as indicated in this example of W21, 0.1K, 5%, taped and ammo packed. Sample Part No. IRC Type Value Tolerance Code J = 5%, G = 2%, F = 1% W21 9K1 J A Packaging Details 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 W20 Series Issue December 2008 Sheet 4 of 4 |
Price & Availability of W219K1GA
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