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  www.vishay.com 52 nma....si vishay draloric document number 20123 revision 02-aug-02 for technical questions, contact ff1aresistors@vishay.com nma0207si + 4500 500 36r 5% a5 model tc resistance tolerance packaging ppm/k range ? % a5 ammopack -5000 pcs ordering information metal film resistors, fusible type features fusible resistor for constant current designed for overload protection high positive temperature coefficient flame retardent coating defined switch-off behaviour model power rating temperature tolerance resistance e-series p 70?c coefficient range w ppm/k % ? nma0207si 0.35 + 4500/ 500 5, 10, 20 1r0 - 47r 12 - 24 10, 20 r10 - r91 12 nma0309si 0.45 + 4500/ 500 5, 10, 20 1r0 - 47r 12 - 24 10, 20 r10 - r91 12 nma0411si 0.5 + 4500/ 500 5, 10, 20 1r0 - 47r 12 -24 10, 20 r10- r91 12 ? further values on request ? coating: beige ? marking: additional 5 th band, black standard electrical specifications parameter unit nma0207si nma0309si nma0411si rated dissipation at 70 c w 0.35 0.45 0.5 minimum overload to fuse w 1.5 2.0 3.0 time to fuse (max) s 30 40 50 thermal resistance (max) k/w 220 190 150 max. applicable voltage after fusing v 85 category temperature range c - 55 / + 155 failure rate 10 -9 /h < 30 weight g 0.22 0.31 0.52 technical specifications 120 100 80 60 40 20 0 derating - 55 - 25 0 25 50 75 100 125 155 175 200 ambient temp. in ?c rated power in % 70
www.vishay.com 53 nma....si vishay draloric document number 20123 revision 02-aug-02 for technical questions, contact ff1aresistors@vishay.com 4 3 2 1 1 2 3 4 5 6 7 8 9 10 20 30 40 50 60 60 50 40 30 20 10 7 5 model reel box min. order qty min. order qty pieces / reel code packaging units pieces / box code packaging units nma0207si 5000 r5 1 5000 a5 1 2000 a2 2 nma0309si 5000 r5 1 5000 a5 1 2000 a2 2 nma0411si 2500 re 1 1000 a1 2 test conditions of test requirements endurance at 70 c 1000 hours at 70 c 1.5 hours "on", 0.5 hours "off" 1% iec 60115-1 4.25.1 endurance at uct 1000 hours at 155 c without load 1% iec 60115-1 4.25.3 thermal shock rapid change between upper and lower category temperature 0.25% iec 60115-1 4.19, iec 60068-2-14 damp heat steady state 56 days at 40 c and 93% relative humidity 1.5% iec 60115-1 4.24, iec 60068-2-3 resistance to soldering heat 10 seconds at 260 c solder bath temperature 0.25% iec 60115-1 4.18, iec 60068-2-20 performance packaging dimensions ? taping in acc. with iec60286-1 ? d and l measured in acc. with iec60294 ? d according to iec60301 model dimensions [in millimeters] dll 1max bde nma0207si 2.3 -0.3 6.1 -0.5 8.1 53 1 1) 0.6 7.5 nma0309si 2.9 -0.3 8.1 -0.6 10.1 53 1 0.7 10.0 nma0411si 3.5 -0.3 10.5 -0.6 12.5 53 1 0.7 12.5 1) also available in 26mm tape metal film resistors, fusible type 4 3 2 1 1 2 3 4 5 6 7 8 9 10 20 30 40 50 60 60 50 40 30 20 10 7 5 time to fuse (secs) fusing performance nma 0309si time to fuse (secs) fusing performance nma 0207si nma 0411si l 1 l d d b e 6 mm power in watts power in watts


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