www.vishay.com 24 NMM0207SI vishay draloric document number 20001 revision 24-jun-02 for technical questions contact : ff1aresistors@vishay.com features fusible resistor for constant current designed for overload protection high positive temperature coefficient flame retardant coating defined switch?ff behaviour metal film, cylindrical, fusible resistors ordering information NMM0207SI + 4500 / 500 36r 5% bp model tc resistance value tolerance packaging ppm / k ? % bp-blistertape 1500 pcs technical specifications parameter unit NMM0207SI rated dissipation at 70 c w 0.35 minimum overload to fuse w 1.5 time to fuse (max) s 30 max. applicable voltage after fusing v 85 thermal resistance k/w 220 category temperature range c - 55 / + 125 failure rate 10 ? /h < 30 weight / 1000pcs g 71 coating: beige marking: additional 5 th band black; for further information see appropriate catalog or web page standard electrical specifications model power rating temperature tolerance resistance e-series p 70 c 1) coefficient range w ppm/k % ? NMM0207SI 0.35 + 4500/ 500 5, 10, 20 1r0 ?47r 12 ?24 NMM0207SI 0.35 + 4500/ 500 10, 20 r10 ?r91 12 1) power rating depends on the maximum temperature at the solder point, the component placement density and the substrate material. packagimg: see smm0207
www.vishay.com 25 NMM0207SI vishay draloric document number 20001 revision 24-jun-02 for technical questions contact : ff1aresistors@vishay.com metal film, cylindrical, fusible resistors model dimensions [in millimeters] d max d * l a max a min NMM0207SI 2.2 d -0.4 5.8 - 0.3 1.2 0.6 * d measured in the middle of the resistor solder pad dimensions [in millimeters] model reflow soldering wave soldering ab l a b l NMM0207SI 1.8 2.5 2.9 2.4 2.5 2.8 performance test conditions of test requirements endurance test at 70 c 1000 hours at 70 c, 1.5 hours "on", 0.5 hours "off" 2 % iec 60115-1 4.25.1 endurance at uct 1000 hours at 125 c without load 2 % iec 60115-1 4.25.3 overload test short time overload for 2 seconds 2 % iec 60115-1 4.13 thermal shock rapid change between upper and lower category temperature 2 % iec 60115-1 4.19 iec 60068-2-14 damp heat steady state 56 days at 40 c and 93% relative humidity 2 % iec 60115-1 4.24 iec 60068-2-3 resistance to soldering heat 10 seconds at 260 c solder bath temperature 1 % iec 60115-1 4.18 iec 60068-2-20 soldering information for reflow soldering only board has to be thoroughly cleaned after soldering. all flux materials must be completely removed. dimensions ambient temp. in c -55 -25 0 25 50 75 100 125 20 40 60 80 100 120 0 power rating p in % derating 70 power in w 1 2 345678910 2 3 4 5 7 10 1 fusing time in s fusing performance 20 30 40 50
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