LOW-COST GENERAL PURPOSE CONFORMAL COATED WIREWOUND RESISTOR Alloy resistance wirewound on fiberglass core SPP SERIES * * * * * ISO-9001 Registered Mechanically crimped termination assembly. Color band standard identification Coated or uncoated units Positive high TC's upon request Weldable and solderable magnetic leads Lower ranges available - contact factory EIA/MIL color code: first wide band indicates wirewound construction, blue indicator indicates flameproof. SPECIFICATIONS: IRC Type Standard Resistance (ohms) Standard Tolerance (%) Power Rating (watts) Load Life Stability Max. Continuous Working Voltage Min. Insulation Resistance - Dry Min. Insulation Resistance - Wet Min. Dielectric Withstanding Voltage Current Noise Temperature Rise at Rated Load, 25C Ambient Temperature Coefficient SPP-2 0.1 - 2400 5, 10 2W @ 85C 1W @ 140C ----2W @ 85C 10% PR 10,000 megohm 100 megohm 600 volts RMS Negligible Approx. 200C SPP-1 0.1 - 1200* 5, 10 1W @ 85C 3/4W @ 105C 1/2W @ 125C Derating to 0 @ 160C 1W @ 85C 10% PR 10,000 megohm 100 megohm 600 volts RMS Negligible Approx. 150C 600/C 0.10-0.91 300/C 1-1200 600/C 0.10-0.91 SPP-3 0.1 - 2400 5, 10 3W @ 85C 2W @ 145C 1W @ 190C --3W @ 85C 10% PR 10,000 megohm 100 megohm 600 volts RMS Negligible Approx. 225C 300/C 1-2400 600/C 0.10-0.91 300/C 1-2400 NOTE: Unless specified otherwise standard test centers are 1 3/4 inches. DIMENSIONS (Inches): IRC Type A B C.002 SPP-1 0.400 max. 0.148 max 0.032 SPP-2 0.570 max. 0.170 max 0.032 SPP-3 0.570 max. 0.170 max 0.032 A max. C B 1.125 min. FUSE/PULSE APPLICATIONS: SPP resistors normally fuse in less than one minute with five to ten times rated wattage depending on the range. By modifying the windings, using a different wire size or type, they can be made to fuse much faster. On the other hand, by using larger wire diameters and higher melt temperature alloys they can handle from five to fifty times overloads of film resistors depending on the range. WIREWOUND AND FILM TECHNOLOGIES DIVISION 736 Greenway Road * Boone, North Carolina 28607-1860 * Tel: 828-264-8861 * Fax: 828-264-8866 * www.irctt.com 1 ISO-9001 Registered SPP CHARACTERISTICS: MAXIMUM LIMITS Temperature Coefficient SPP-1 SPP-2 SPP-3 600/C 300/C 600/C 300/C 600/C 600/C 0.10-0.91 1.0-1200 0.10-0.91 1.0-2400 0.10-0.91 1.0-2400 Thermal Shock Low Shock Short Time Overload Commercial Short Time Overload Resistance to Solder Immersion Solderability Moisture Resistance Life Test Test Method 5% 5% 5% 5% 3% 95% minimum coverage 5% 5% EIA Specification RS-344 TEMPERATURE RISE: Temperature Rise (C) Percent Rated Power POWER DERATING: 100 80 SPP-3 60 SPP-1, 2 40 20 0 0 50 100 150 200 250 300 300 SPP-3 200 SPP-2 100 0 Ambient Temperature (C) SPP-1 0 20 20 40 60 40 80 100 60 80 100 Percent Rated Power HOW TO ORDER: Sample Part No.: SPP 1 1K 5% IRC Type Power (See specification chart for other power ratings) Resistance Value Expressed in ohms (Standard EIA/MIL values) Tolerance 5%, 10% standard 2 WIREWOUND AND FILM TECHNOLOGIES DIVISION 736 Greenway Road * Boone, North Carolina 28607-1860 * Tel: 828-264-8861 * Fax: 828-264-8866 * www.irctt.com