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| riedon inc. 300 cypress avenue alhambra ca 91801 (626) 284-9901 (626) 284-1704 www.riedon.com 09/08 type wattage rating ( watts ) ohmic values tolerances tcr dimensions a 0.040? [1mm] b 0.020? [0.5mm] c 0.002? [0.05mm] d min mffs-1 1 1 ohm to 10k ohms 5% 250ppm/k 0.375 [9.5] 0.138 [3.5] 0.024 [0.6] 0.98 [25] mff-1 1 0.472 [12.0] 0.157 [4.0] 0.032 [0.8] 0.94 [24] mffs-2 2 0.472 [12.0] 0.157 [4.0] 0.032 [0.8] 0.94 [24] mff-2 2 0.630 [16.0] 0.217 [5.5] 0.032 [0.8] 1.26 [32] MFFS-3 3 0.630 [16.0] 0.217 [5.5] 0.032 [0.8] 1.26 [32] mff series fusible resistor resistances from 1 ohm to 10k ohms power rating 1 to 3 watts resistance tolerances of 5% tcr: 250ppm/k standard ? ? ? ? ? specifications part number - resistance - tolerance example: mff-2 10 ohm 5% speci cation value minimum fusing overload ( time ) fusing characteristics 1 ohm to 3.6 ohms 1.1k ohms to 3k ohms 15 times rated power ( 30s max ) 3.9 ohms to 1k ohms 12 times rates power ( 30s max ) temperature range -55c to +155c insulation resistance >10000 mohms max working voltage 300v ( 250v mffs-1 ) max overload voltage 600v ( 400v mffs-1 ) dielectric voltage 400v environmental performance (mil-std 202) r load life 5% resistance to solder heat 0.5% + 0.05 ohm temperature cycling 1% + 0.02 ohm short time overload 2% metal film, fusible resistors ordering information
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